2022 Apr 28 to 29:

Installed a new remote handling 4" indium joint for new beamline 4 north section. Issues were encountered in clearance between the downstream steering magnet and the compression collar of the joint. Joint installation itself went smoothly. 

The drive screw is a 17mm hex instead of a 5/8". This was noted in the install of the blank off plate in 2016.

See attached pdf report for photos and more description.

 beamlines replaced leaking insulator on q15, circuit #4. See updated pdf for replacement part and location.

The M9 Q1Q2 magnet assembly was installed in the M9 beam line today. 

Attached to elog is an inspection report of the indium ring that will be used in the M9 T2 Q1 joint.

Today we attempted to scrape remnant indium from T2 M9 exit port and clean B1 knife flange for the new magnet. Report of todays activities attached to the elog.

The Beam Position Monitor between 1VB1 and 1VM3 has been installed. The indium joints are leak tight, however the V flanges are leaking slightly. The leak is small enough to still be able to run beam.

The Pin drive at the BPM and 1VB1 joint was replaced with a new one. The pin drive that was originally there had a bent screw drive so it was retired. The clamping collars at both joints were reused.

 The M9 B1 was removed from the M9 channel surveyed and moved to the remote handling warm cell for refurbishment.

The warm cell is currently locked. Remote Handling should be contacted if access is needed to B1.

A field map of B1 is attached as a pdf file.

Beamlines shot the position of the M9 T2 port and B1 flange for setting the M9 test stand flanges today. We removed the target jigs after this was done.

Annotated drawing of TBP0425D attempting to capture the repairs of 1A Q15 triplet magnet ceramic insulator/coils over the years.

Note that the file contains embedded comments visible only if opening the file in adobe acrobat reader.

Surveyed contents of storage flask located at TNF. The lid was lifted off roughly 12" up and a pole monitor was swept over the opening. The fields of the combined items in the flask were 9.84 mSv/h at 12-24". Extrapolated, the field is approximately 3.7 mSv/h at 1/2 m. 

The flask contains an indium blank off plate, ISAC beam window and some miscellaneous used water fittings. The ISAC window is probably the largest contributor to the field.

A list of the contents and the dates the were placed into the flask are attached to the top of the flask lid.

 Found original installation notes for the initial installation of M9 Q1Q2 generation 2 in 1988.

Dated May 17th there is a notation that the 15 inch indium ring was loaded with "Gummy Mag". Note that the rationale for using an elastomer seal in an indium knife application is still unknown.

See attached scan for repair notes regarding M20 Q2 during the 2019 winter shutdown. The repair method for M20 Q2 was instigated by Doug Preddy and Beamlines group. Cooling line was blanked off during the 2019 winter shutdown in order to keep the M20 beamline running without removing the magnet and doing a complete repair on the leaking coil. 

Today leak checked the M9 exit port with Edi and we found no leaks. The usual delayed helium response in the M20/Collimator B/ M8(?) area is still persistent, however Edi says the vacuum level at T2 is the same as before.

Shielding should be restored next week.

1. Blank off installed 11:40 with Dan McDonald, east spring ear looks 'deeper" than west.

- Reused all hardware from last install, most active hardware was around 10 mSv/h on contact

- Zero point was at the 1/2 turn marker pen mark

- Installed at 1.5 turns from "finger tight" zero.

2. Spring eye zero set on a spare flange with spare pins.

- backed off 1/2 turn then mounted to exit port.

- tightened .5 turn to get to zero, then 1.5 turns on east and west sides to seal, in increments of .5 turns alternating.

3. Called Edi to start pumping on T2 at 12:50

Removed all Leica tracker targets from M9 pit, I will proceed with blanking off T2 exit port sometime this week. Alignment group has taken possession of their laser equipment and the target jigs.

Installed the remaining laser tracker jigs for beam lines. No issues. Made sure 8" target the mounting poles did not interfere with each other and pin drive was engaged with no issues.

Video imaged T2 port post blank off removal, looks roughly the same as last year. Knife edge looks clean.

Attached composite photo of flange face, ring is a stand off to maintain focus distance to camera. Also attached partial composite image of 2017 video inspection.

Blank off removed this morning, video recorded the T2 flange,B1 flange and B1 vacuum box interior. Blank off is 150 uSv/h @ .5m, 3 mSv/h on contact at the spring eye ears. Not swiped yet, not tagged. Currently tucked between an 18' shield block and the ME27 block.

Waiting for beam lines to install the target spheres on the target jigs, expecting to install them tomorrow.

Set up shielding canyon for M9 laser tracker job.

Fill shielding blocks are not removed yet, to be done tomorrow.

Uncovered and placed bridges for 1a q12 q13 for doug's re cabling work. See WP C2018-02-13-2: work permit

1.) Completed covering up 1A Q15.

2.) RH flask currently contains the 8 insulators removed from Q15. 3.6 mSv/h on contact, 40-60 uSv/h @ .5 m. Double bagged. Bag exterior was swiped clean, inside was not checked (didn’t want to breach interior bag just to swipe components).

Correction that all supply side (even numbered insulators) ceramic insulators on Q15 have been replaced with new old stock insulators as of today. Beamlines finds no power or water issues. Expected to cover up tomorrow moving on to the Q12 and Q13 magnet area next week.

T2 vacuum started today.

One of the cracked insulators is being stored temporarily in the warm cell (it is contaminated), Scott M. will be analyzing the broken ceramic once he has decontaminated it.

Beamlines has changed out another 2 insulators on Q15 after discovering two additional leaks. Insulators #2 & #4 were replaced. One of them failed on installation (broken ceramic?)  and was replaced by another stocked replacement. Magnet was pressure tested and now enegerized as part of power testing. Doug P. expects repairs to be complete and to cover up the area by tomorrow.

Assisted beamlines in replacing 2 insulators on 1A Q15 magnet. #10 and #14 insulators were found to be leaking at the ceramic, where the stainless steel fitting joins the insulator. They were both replaced. During re-installation of the #10 ceramic, the VCR coil termination broke off the coil end and a new one with updated design (see TBP0379) had to be soldered back in its place. The original SS fittings are deemed to have problems in their construction and have been replaced over the years.

Video capture shows soldered fitting with a large glob of excess solder on bottom. Other photos show new fitting soldered in place and completed assembly of fitting with new insulator.

test

On Monday found leaking joint was the ring directly downstream of T2. Vacuum group has been spraying Vacseal (http://www.vacseal.net/Pages/default.aspx) sealant over the last 3 days attempting to get it in between the flanges and have partial vacuum to draw in the fluid. Seven sprays have been completed as of March 16th.

Tomorrow, 2 more applications will be made and then Vacuum group will pump the T2 volume over the weekend.

Started uncovering the area above the T2 to Q13 joint:

Restored shielding to T2 M9 void, blocks seem more crooked compared to previous years.

Leak checked the blank off at T2 M9 exit port with Dimo Y. and Edi D.V. (Vac Group) and they confirm it is leak tight. Blank off installed on the 15th, pumping started on morning of the 16th and leak checked today in the morning on the 17th.

Starting to clean up work area.

Installed the blank off on the T2 M9 exit port:

Blank off 2013 installation procedure: 2.5 turns of the preload nut, after pins are engaged and springs are at free length.

Blank off 2015 installation procedure: 1.5 turns of the preload nut, after pins are engaged and springs are at free length. (one less turn for insurance?)

2017 (this year) installed blanking plate via hammering/tapping pins into place:

1. Spring eyes were set at spring free length and then placed down
2. Pins did not slide through eyes as was expected.
3. Nuts were then backed off roughly 1 turn, then pins were lightly tapped down into place
4. Nuts then turned back to zero/starting position
5. Then alternating east west by .5 turn tightened to 1.5 turns, 1/2 turn indicated by half bar pen marking.

This year different than prior years due to tapping pins into place rather than backing off eyelet nuts and sliding pins into place *then* tightening to zero point and then tightening to preload.

Blank off installed at 11:15, vacuum group not able to pump on T2 until tomorrow.

Attached a quick comparison of M9 exit port flanges WRT indium remnants: looks roughly the same. Will attempt to install blanking plate tomorrow morning.

Installed all jigs and Alignment group did their shoots successfully. Used individual pins on the 15" target jig and worked ok. 8" target jig has some previously undiscovered issues from the previous shoot from 2015 but did not affect this shoot.

Prepared m9 and b1 flanges for accepting their target jigs. The target jigs need to be reset by alignment group, 15" was bumped and 8" lost 2 of the target balls into the beam line. Reflector balls were recovered with a magnet on a stick, contaminated with 250 CPM, need alignment group to decontaminate and clean them before use and reset the two jigs.

Syd installed two springs on the 8" target jig and only one spring is needed.

 - Removed blank off from t2 m9 port, had to pry off with screw driver via spring ears. Clean removal it seems.

- Blank off is 200 uSv @ .5 m, 5000 CPM above bg.

- looks like 2 knife steps all around with oozing on the left and right, 0 and 180 deg positions. 0 and 180 look like 2.5 steps. Looks like it took one turn to remove/loosen blank off.

- Junk indium at bottom of exit port still present, indium knife edge seems clean. Ribbon stayed in blank off.

Removed temporary shielding blocks from M9 hole and placed in temporary bunker. Capped with 18' shielding block. Blank off ready to be removed and target jigs ready to be installed, weather permitting.

Raw leak check results from vacuum group attached as pdf.

Finished setting up work area around T2 M9 front end.

Week of Jan 23 to 27:

- Uncovered shielding around T2 M9 area.

- Initially set up remote handling bridge thing but stopped because of the stacked 12 x 2 x 3 blocks, looks precariously tall, wobbly. Suggested to postpone leak checking work and configure bridge to a more usual setup for safety.

 - Moved some bridges around, put some lights in cable tray area.

- Beamlines tied in M9 floor markings to the meson hall grid on the 18th

- Beamlines tied in B1 alignment to meson hall grid on 26th

- He leak checked around T2 area with Dimo and Edi, nothing found. Suspicious leak at M20 scraper area but cannot rule out drift toward the collimator joint. Will need to reassess later on in the shutdown when we go to that area.

- Doug and electricians looked around the cable tray feeding to M9, via tunnel and mezzanine.

Re-installed indium vacuum joint for 1VQ4, routing installation. R. Kuramoto sprayed silicone grease on to the threads and bushings on pin drive. Drove down tapererd pins and stopped 1/16" short of old marker markings.  RK. Commented on the drive screw bending under load, reversed drive 1/2 turn to relieve the stress on the screw.

Contacted E. Dalla Valle to continue assembling beam line down stream and pump when ready.

 On 14March2016, 4VQ1&Q2 were removed from BL4V and lowered into the Vault basement B3 level where they were stored in the south west corner on their respective wood pallets.  The hot ends of both magnets were place against the west wall.  4VQ2 was lifted out first and moved temporarily downstream where it was separated from its magnet stand. Q2 was then craned into the basement where it was tipped 45^o to lay on the flat side of the magnet face.  Q2’s magnet  stand and it’s mounting brackets were then craned down onto another pallet and moved to the same storage area.

4VQ1 was pulled about 3-4 ft. downstream using a pair of ¾ Ton come-along winches to clear the overhead Elevating Jacks platform.   Q1 was then separated from its stand where both were lowered onto pallets like Q2 and moved to the storage area.  Four concrete shield blocks were postioned down stream of 4VCM1 to shield the beam exit port.

The total accumulated dose received was 0.46mSv spread amongst 5 people.  See W/P C2016-03-11-5 for Rad survey levels of Q1 & Q2.

See the attached photos.

 On 8March2016, under W/P C2016-03-08-2, 4VQ3 was lifted out of BL4V with the vault orbit crane where it was first weighed then lifted onto the RH flat deck rail dolly.  It was then moved into the RH basement where it was surveyed before lifting it up onto the Red wagon cart in the RH loading bay.  It was then pulled to the Meson Hall loading bay by fork lift where and then over the Cycloton vault to the top of the E-Hall roof beams under the 10 Ton crane.  4VQ3 weighed 5900 Lbs. using Plants Groups "RON Load scale".  It was 60uSv/Hr @ 0.5 M on the upstream side with no contamination on the swipes.

The total accumulated dose received was 0.34mSv spread amongst 7 people.

See the attached photos.

Attempted to remove RH parts between Q1, 2 and monitor vacuum box. Removed Q1 to monitor box parts, could not remove monitor to Q2 parts, pin drive and indium ring are stuck in place. Indium joint is severed however. Collar was removed.

East leg of pin drive was bent trying to remove the stuck indium ring, it is stuck to the monitor box.

Recommend to proceed with removal of magnet regarless of the current state of the indium ring.

Pails with RH parts marked 1384, 1385, 1386 and stored in north end of vault tunnel on grey shelf. RPG storage book updated to reflect this.

Rolled indium into new blanking plate turned down to 5.550". Dry fit with no indium ok. Assembled hook eyes from the previous blank off plate (removed from the slits box?). Used the same 20.5 mm spring compression (1.5 turns of the nut from finger tight). Hooks did not move 100% completely freely, but seemed ok.

Blanked off CM1: Reused CM1 pin drive (was written on the pin drive) Pin drive was 500 uSv/h on contact. Working at beam plane level seemed to have lower dose rate. Drove down to 1/8" just before shoulder on taper. Intended to use WD-40 but can was empty. Vacuum leak check will have to wait until a later date.

2016 02 23: Attached scanned inspection report of as installed blanking plate.

Continued with work blanking off CM1 flange.

- Placed lead shot on left and right side of the CM1 flange to lower fields. No significant change, went from 2.8 mSv to 1.9-2 mSv.

- Inspected indium flange, some residue on 3 and 9 (left and right) clock sides of knife flange. No significant indium stuck on, some small cleanup done.

- Spare blank off test fitted, did not fit: rocking felt from side to side. CM1 flange seems to be ovalized. Test fitted an aluminum carrier ring (B-3471), fit. Difference in OD sizes is 5.560 vs 5.550 (indium carrier ring is smaller). Will skim blanking plate to 5.550" and reassemble blank off.

Work to continue next week.

Disconnected all 4V beamline joints. Parts for indium joints removed except for the Q1 to downstream monitor box and monitor upstream to Q2 due to access issues (no space for ingress). Removed pin drive and collars currently piled on top of the beam line stands near the concrete shielding block on the north side of the vault. These need to be sorted for storage as waste or spares. Indium ring carriers were all bagged and left in the area waiting for a storage location.

Returned work permit C2016-01-27-2 due to tank lid being raised and elevated fields make the work area un-favourable to work in. Work will resume to blank off the combination magnet flange when the tank lid is closed in March.

Tasks remaining:

- Inspect combination magnet flange, document valve stand

- Clean indium off of flange (if necessary)

- Install indium blank off and helium leak check

Today:

Disconnected and removed 4VVR1 gate valve and removed from beamline.

- Pin drives removed and stored in bags near by

- Hook collar removed and stored in separate bags. The hook collar used at CM1 was marked with an "X".

- Indium rings also removed and stored in separate bags. Indium appeared to not stick on to the flange during removal on the tank side flange. A closer inspection will be needed at a more convenient date.

- Craning out the valve proved difficult as the shiv block was interfering with the motor lift. Lifting the valve on to the combination magnet, adjusting the sling length shorter and then final craning was the procedure used.

Cyclotron tank flange entrance at combination magnet has been covered with plastic bag and taped off. Valve was then transported to the north tunnel alcove for intermediate storage as per instructions from RPG.

Note that during cart transport, the valve tipped and fell off the cart. No visible damage could be seen on initial inspection.

Today: Restored filler shielding in T2 M9 Q1Q2 hole.

- Blocks marked with beam direction on this installation. Active faces point toward target monument.

- Checked spring eye spacing after installation under vacuum overnight, appears to be equal on both sides. 1/16" spacing.

- Remote handling equipment has been removed from work area and restoration of shelding around T2 has begun as of 15:00.

Yesterday (Apr 15):

1) Installed TB22265 on to M9 exit port at 18:48 with no vacuum and left over night. Done per 2013 installation procedure (1.5 turns of the preload nut, after pins are engaged and springs are at free length)

 - On this installation, the nuts (TB22264) and tool block (TB22263) were reused from the 2013 blanking plate. The blanking plate (TB22267), spring eyes, springs and washers were new parts. Reused parts were 900 uSv/h on contact and 50 uSv/h @ 1/2m.

 - Spring eye, spring eye washers and nuts had fitment issues due to manufacturing errors. No dry fitting of parts was performed before hand. Spring eye used was a new style single piece machined type.

 - Selected springs were used in this installation: East spring rate: 4762 lbs/in, West spring rate 4972 lbs/in. See attached spreadsheet for spring rate test details.

2) 2013 TB22265 (previous) blanking plate was discovered to have a stuck spring eye on the East side.

 - Spring eye would not rotate or slide freely when moved by hand. Upon removing the spring eye with a mallet, evidence of aluminum galling could be seen.

 - Pin diameters measured were .499, diameters on drawing were .497 -.002/+.0. Specified hole diameter on blanking plate is .500 +.001/-.0. These spring eyes were of the 2pc welded type.

 - Despite larger than drawing size, west spring eye could still slide freely. On east spring eye near the welded area filing marks could be seen near the galling. This area measured .4995 at one point.

- Suspect this manufacturing defect (a lump) caused the spring eye to bind and cause the indium knife to stop advancing.

Today (Apr 16):

1) Leak checked blank off after leaving clamped over night. Vacuum pumping started at 9:00, leak check began at 11:00. Appears to be leak tight. (leak check results attached)

- Spring eye gaps appear to be the same as the previous day.

2) Began tear down of bridge and shielding setup.

- Surveyed the following radioactive items for storage in RH lead flask:

- M9 B1 pin drive hold down bolt; 800 uSv/h on contact,  50uSv/h @ 0.5 m. no removable contamination.

- TB22265 2013 blank off; 3900 uSv/h on contact, 200 uSv/h @ 0.5 m. 3000 cpm, on gamma detector (44-2) and 1600 cpm contamination on RM-14.

Yesterday:

1) Addressed mounting issue with the 15" alignment jig: removed material from the spring eye to make the hole from 1" to 0.75" when bottomed out. This would cause the spring eye and mounting eyelets on B1 to have 0.226" of starting overlap, vs the original 0.024" negative overlap previously seen.

2) M9B1 15" pin drive was removed along with the securing bolt. The bearing block on the pin drive had seized up and could not be rotated. It was decided to remove the screw drive from the pins and drive down the pin assembly in a manner similar to installing the 8" target. Installation of the 15" jig will continue today.

Today:

1) installed 15" and 8" sighting jigs, Beamlines group completed multiple passes for measurements. 15" pin drive was installed without the drive mechanism which was seized, pins were slipped into place (same procedure as 8" rubber seal blanking plate).

2) Reinstalled dust cover on to B1 flange, wiped off vacuum pump (?) oil from inner side of cover with acetone. Also wiped B1 flange with acetone + lint free cloth. The inner surface of the B1 flange and knife edge will need to be cleaned with specialized tooling.

3) 15" pin drive was replaced as follows: Seized screw drive was partially re-threaded into the taper pins, pins were lowered into place into receiving holes and the hook block that locates the pin drive was re-engaged. The pin drive securing bolt was left out. Not that this particular pin drive is not to be used in the future, high field parts were replaced for storage purposes.

Continued with installation of target jigs:

1) Craned in equipment for alignment group.

2) Attempted to install target jig over B1 flange;

- Not enough horizontal distance south of B1 flange to install the target flange vertically and into place, jig must be maneuvered in side ways from the east of B1 into position.

- Spring eyes were designed such that after driving the taper pins into place the spring eyes were not being loaded due to a lack of allowing for spring compression. Design is being studied to fix this problem.

- B1 sighting flange was subsequently removed and one spring eye removed from the assembly (taper pins were left partially engaged in the top ear of the T2 M9 @70 Turns up (20 turns down)). Total amount of turns to drive down pins is 90 turns.

3) T2 M9 Q1 8" sighting jig was installed into place successfully

- Threaded pole used to install the 8" jig could not be unscrewed due to the pole tool securing nuts interfering with the pole used to install the pin drive (no clearance for tools). Poles are to be left in situ, screwed into their respective equipment until job is completed.

3) Alignment group sighted the T2Q1 target flange and the mushroom pad jig. They will continue on Monday with the B1 flange should the spring eye problem be addressed by then.

1) Vented T2 and removed rubber seal blanking plate, vacuum level appeared to be at normal operating ranges prior to the indium seal developing a small leak.

2) Removed B1 dust cover, cover was stuck to B1 flange due to oil residue. Oil residue is believed to be from a vacuum pump being turned on in the disconnected section of M9B line. Residue was seen on the bottom half of the B1 to Q2 flange, it was cleaned off using a cotton glove and acetone attached to a 20ft pole. Attempting to clean with wipealls left lint behind.

3) Mushroom pad jig installed in place, shielding reconfigured and platform plates in place. Target flanges to be installed tomorrow.

1) Visual inspection of T2 M9 flange: no obvious indium deposits on T2 flange knife edge seen, left over indium from before 2013 is still present on counter bore. See screen captures. Screen captures show state of flange after removing blanking plate, no cleaning was performed after removal.

2) Rlanking plate with rubber seal installed on T2M9 exit port at noon. T2 volume pumping started around 13:00.

2)  Plot of pressure over a week period of 1ACG3, units in Torr:

work to prepare for installation of alignment jigs on T2M9 and M9B1 continues:

1) Vented T2 volume and removed M9 blanking plate. Volume was not fully vented so plate was stuck and had to be pried off slightly. Around 2 turns of the nuts were required to undo the spring eyes, this is likely less than the total number of turns that were used to tighten the assembly since the indium knife embeds itself in the indium. Blank off is currently bagged in the hot block bunker.

2) Visual inspection of indium impression: 3 knife steps seen all around, east and west sides have indium that look like they have made contact with the bottom of the counter bore. Top and bottom have show distinct "oozing out", but not flattened.

3) Blank off plate fields: 3.9mSv/h on contact, 200µSv/h @ 1/2m. contamination on indium area: 5500 cpm on 44-2, 22000 cpm on rm14; contamination on central aluminum only area: 1300 cpm on 44-2, 1000 cpm on rm14.

Work completed for Thursday:

1) Shielding filler blocks removed from M9Q1Q2 hole. Highest field was 5mSv/h coming from TSH0081 on the end facing the monolith. Blocks and frame had 1000-1200 CPM of contamination.

2) Filler blocks were placed in bunker formed by 18' shielding blocks. An additional 18' block was placed over the bunker to shield the south mezzanine from the field coming from the filler blocks. Bridge setup around M9T2 hole reconfigured slightly for fall protection purposes.

3) Blanking plate nuts on T2M9 exit port were tightened by 1/2 turn at 16:00 (first West side then east, by 1/4 increments. eg 1/4 + 1/4 West, 1/4 + 1/4 East). No immediate effect on vacuum observed.

Attached is survey of steel filler shielding blocks. Contamination on the support frame is unknown, either 0 contamination or not recorded.

1) Block and bridge setup is mostly complete for T2 M9 sighting job. Waiting on approving drawing TB22322 in order to continue with installing sighting equipment.

2) He leak checked upstream of T2 and surrounding area. Appears to be a small leak at the M9T2 exit port through the blanking plate seal. Mode of failure undetermined at this time. Leak does not impact operation of beam line 1A according to vacuum group.

Started to uncover and create work space around T2 M9 area, setup is mostly complete. Some misc items to be craned into position. RH set up is mostly to do He leak checking of 1A beamline due to vacuum leak somewhere in the area around T2, bridge on B1 side of M9 has not been set yet.

1) Quick connect fittings on the rotary collimator were leaking (the two red collared fittings in photo below).

Replaced quick disconnect connectors on rotary collimator with compression fitting unions and bypassed the bulk head on the collimator, water hoses are hanging loose.

1. (top) supply line has an additional union + spliced line 90deg section
2. (bottom) is return line

The hoses should be shut off at their supply and then disconnected by undoing the fittings, if the collimator is to be removed. 

2) Replaced leaking fitting on 1AQ9 water cooled indium joint. Copper refrigerator tubing that runs down the shielding block cable chase that feeds T1 from the water package. Replaced both return and supply section as they were corroded (joined) together. Unsure which is supply or which is return line, or if it matters.

Final state of top of collimator area in picture below, inlet and outlet tagged (2015 mar 5).

2015 mar 6: the replaced supply joint was leaking a small amount of water through one of the union joints, decided to remove both the suspect union joints and connect the metal hose to the copper line. Appears to be okay/dry.

He leak checked T1M13Q1 joint, is leak tight.

 - Detected a small leak in nearby M15 slits box. 4.3x10E-9 atm cc/sec was highest leak rate recorded (Vac group says is small leak, okay to run).

 - Will be tearing down bridge setup and cover up area.

Blanking plate with indium between T1 and M13Q1 flange has been installed, joint will be He leak checked tomorrow. Vac group informs that pumping of T1 volume will start this afternoon going over night.

- The spring eyes on Q2 vacuum box are ~0.2" above the pin supports, the gap changes by 0.05" between open and closed positions.

- Pin drives were driven down to 34 turns (left a 1/8" gap between the bar and the top of the T1 flange)

- A thermocouple wire was attached to the blanking plate, leads are not yet connected however.

"Hector" shield block installed into place, Q1Q2 Vacuum box still actuates normally. It does not appear that the position of the pin drive has shifted. Some additional shielding steel is to be placed on top of the shield block once RH setup is removed.

Remote handling equipment installed around T1 ready to install indium blanking plate between T1 and M13Q1.

Installed Q1Q2 pin drive and attempted to align it to the vacuum box. Spent majority of the day trying to align the pin drive/anchor.

- Pneumatic drive does not actuate smoothly, appears to be binding/catching, possibly due to some kind of misalignment, issues with the pneumatics. A 1" space between T1 and Q1 flanges has been set but has a slight taper, starting 1" wide on the north east side tapering down by ~1/16 (to 15/16") to the west.

- Gap has been set as a comprimise between smooth pneumatic operation and alignment of the flanges. The alignment of the flanges is independant of the axis of the vacuum box due to the front end alignment bellows.

The replacement pin drive anchor (see TB22300) for M13 Q1Q2 vacuum box lowered into initial position. The original B1 base plate was able to rock when weight was placed upon it; A concrete block was used to counterweight the base while the new pin drive was being installed. The pindrive has not been adjusted into final position.

Installed 4" indium seal at 1VM3 to IVQ4. No real problems with installation.

Removed M13 B1 magnet from beam line without issues, Q2 vacuum box is covered with bag and vacuum box "extended" with air off. Field is now 3000uSv @ 1/2m from the open vacuum box where B1 magnet was.

work continues on T1 M13 area for UCN.

- He leak checked T1 M13Q1 joint (sealed with rubber) and surrounding uncovered area, no leaks found.

- Moved back B1 jaws box enough to clear the spring eyes on the Q2 vacuum box.

• Removed and vacuumed bags of lead shot that were placed on the vacuum box between jaws box and bender magnet coils. Some loose shot fell on the floor.
• Did this by loosening the restraining screws of the vacuum box on either end of the magnet (on top only)
• Removed 2 C clamps holding the jaws box down to the magnet subframe (J. Chak and L. Lee pried clamps off)
• J. Chak pried downstream end of vacuum box to shift the jaws box by the required 1/4 inch

- Tidied work area in preperation for removing the bridge setup and to remove the B1 magnet.

- The water line to the T1(?) water cooled indium ring is leaking water near the top of the target station, water system was shut off. The leaking swage lock fitting must be replaced.

RH beam line work for UCN continues at T1.

- Attempted to scrape t1 flange, narrow scraping tool does not fit into space because of the headers on the water system of the magnet. Decided to continue installing blanking plate with rubber anyway.

- Installed blanking plate between T1 and M13Q1 with rubber.

• Q2B1 joint was closed up and pins driven down to anchor the vacuum box in place.
• Joint was opened and then blanking plate was inserted into place against T1 flange. Q1Q2 vacuum chamber was extended to preload the plate.
• The flange needed to be adjusted into place slightly and then the pins driven down to load the plate further where it then needed to be pried into position. After this the pins could be driven down completely.
• Bolt stops on the Q1 flange that brace against the magnet were seen in video inspection. Also bolt lugs like as on the M9 and M20 vacuum box were seen although without bolts present in them.

- Q2B1 joint was disconnected again. Spring eyes are still not fully clear enough to lift away B2 magnet.

T1 M13Q1Q2 work continued:

- Removed T1 Q1 indium seal ring, collapsed center vacuum box bellows using pneumatic cylinders. The bellows restraint was able to be rotated slightly so that the cylinders could be retracted. The brace/restraint bar could only be rotated until the bar made contact with the electrical connectors on Q1.

- T1 Q1 pins driven back down to anchor Q1 vacuum box.

- Separated Q2 B1 joint: Q2 vacuum box spring eyes are still partially trapped. Vacuum box cannot fully retract due to the bar from the bellows bracing/restraint contacting the field plate on Q1 magnet. The joint will have to be manually separated with some other means.

Work continues on T1 M13Q1 joint:

- Discovered some sort of vacuum box brace restricting the collapse of the vacuum box when the air cylinders were actuated. Upon closer observation the air cylinders appear to work, unsure if the "retract" and "extend" port markings work as labeled.

- The brace appears not to be removable, further investigation of this piece is required.

- It is believed the piece is two plates attached to a ring surrounding the central bellows with a bar on the top to facilitate rotation of this blocking device.

UCN T1 work continues:

- Retracted Q1 T1 pindrive, took 34.5 turns. Pins left bolted to T1 monument.

- Freed Q1 to T1 indium joint ring. Tried to collapse Q1Q2 vacuum box with pneumatic system and it did not work. Air cylinder appears to leak through the piston ie. connect air line to one port, air is heard coming through the other port with no motion.

Indium sealing ring currently left loose between T1 and T1 flanges while a method is found to collapse the vacuum box.

RH bridge has been set up over T1 to Q1Q2 area, see images for radiation survey of work area. Joint is still intact, work will commence tomorrow.

1VQ4 & 1VQ6 beamtube was installed by UCN group. RH provisonally installed aluminum indium carrier ring with no indium into joint space with clamping collar and pin drive. Joint is currently connected but not vacuum tight. Joint will be sealed with indium at a later date, tbd.

Disconnected and removed beam tube from 1VQ4, 5, 6. 

- Q6 end had transition end removed with pin drive driven into the retracted position and left behind but indium joint was still intact.

- Retracted the pin drive from Q4 end and proceeded to drive apart joint using reversed pin drive. The joint was stuck and did not come apart using the drive out mechanism. The beam tube end was then pried apart leaving some indium stuck on the knife edge of the beam tube. The indium had to be "severed" to removed the beam tube. The aluminum carrier ring was left on to the adjacent device (IVM3). The hook collar was then removed and beam tube with transition flange (v flange to 4" indium) was then fully removed at this point.

- Aluminum carrier ring was then pried off the flange of the adjacent device, IVM3. The "fin" on the carrier ring was mostly bent after this operation. Most of the indium remained on the ring. Some scraping and cleaning of the flange and knife was needed.

- The beam tube + stuck on transition flange and indium carrier ring are being stored in the vault basement. Fields were 30 µSv @ 1/2m.

- A pin drive and hook flange were left behind bagged under the staircase near the 1VQ4,5,6 area for the subsequent installation of the new beam tube section.

Link to RPG survey map of work area here: https://documents.triumf.ca/docushare/dsweb/Get/Document-86363/dspage03692340282615393127.pdf

Fields around joint were 140 µSv on the south side of the joint, 850 µSv on the north side.

Removed "suck tube" filled with active/contaminated water from top of 1A beam line blocks to meson extension hall warm cell lab. Highest activity recorded was measured at 22mSv on contact, 2000µSv @ 1/2 m. Tube was bagged and craned over to warm cell lab for temporary storage and will be dealt with at a later date. See work permit 2013-12-12-2 for more details.

Installed shielding stand (TSH0094) for T2 M9 exit port as per drawing TSH0095; three steel blocks in total were lowered into the T2 M9 void. See photos. Started to tear down RH  setup after shielding was lowered into place.

TSH0081 and TSH0083 were put into the void along with another unspecified steel block, see photos for details. Pictured below is shielding stand and block TSH0081 installed in place.

Pictured below is TSH0083 and a steel shielding block installed in place. The steel grey block will retain its lift eyes (ie. left in block to be covered up). Top steel block is not specified in TSH0095 and will have to be updated in that drawing to reflect changes.

Before the RH setup was torn down photos of the spring eye gaps were shot from above, see photos for details.

- Pictured on left is the East spring eye, on right is West spring eye. Last photo is of the blank off its installed in place.

Continued with work on T2 M9 exit port and area; Vacuum started after 13:00 hours (due to vacuum pump issues at T2). He leak checked flange at 14:30, determined to be He leak tight. Vacuum pressure as of 14:45 in T2 volume (1ACG7) was at 36mT.

Blanked off T2 M9 exit port with indium seal blank off.

1. Removed temporary rubber blank off from T2 flange.

2. Installed indium blank off TB22267, assembly TB22265 into exit port.

- Blank off installed at 2.5 turns past finger tight, finger tight defined as when springs are captive but still at free length with flange pins installed.

- Finger tight position set on test jig and removed before installing into beamline (backed off 0.5 turns to enable installation of flange pins)

- Blank off installed using the same parameters as testing, tightening spring nuts 0.5 turns alternating East then West West then East (*2012 May 2, KN) until reaching 2.5 turns.

- Installation finished 14:23, installation took 0.5 hours.

- See photos for final installation

3. Leak check of blank off and installation of shielding blocks to follow

Yesterday: did visual, video inspection and still imaging of T2 M9 Q1Q2 void. G. Morris came down to work site for visual inspection, noticed and was concerned about a few of the shielding blocks that were "contacting" the T2 monolith. Of note are the known "crumbling blocks" directly North and West of the T2 monolith and the pointy shielding block (2MB2, DWG# D-3399) North of the monolith which sits on top of a crumbling block. It was not certain if these shielding blocks were touching the monolith but there was no visible gap. See photos.

Also installed an aluminum sheet metal dust cover over open B1 15" flange. See photo.

Photos are located on: \\trwindata\groups\remote handling\Photos\2013\2013_m9q1q2_void

Videos are located on: \\trwindata\groups\remote handling\Videos\2013\2013_m9q1q2_inspection

Yesterday:

Did vacuum testing on MK2 8" indium blank off; installed w/indium on test stand and put under vacuum.

- After 1 turn on spring eye nuts, a soft vacuum seal was achieved but the throttle valve (old leak detector) could not be opened. Spring eye nuts were turned in half turn increments.

- A dial indicator placed on the left of the test jig showed 0.010" movement of the blank off plate within 2 minutes after vacuum was started, after 1 one turn was applied on each spring eye nut. Under vacuum this increased to 0.015" after 5 minutes.

- It was noted that the KF40 flange on the test jig contained a pinhole leak therefore threw off the results. The indium seal appeared to be vacuum leak tight (due to no or low response) when He was applied in close proximity to the flange. The KF side had an immediate response to He.

T2 M9 volume was pumped out by E. Dalla Valle.

- Done in place of actual He leak testing of rubber blank off plate.

- E. D. V. noted that the vacuum level achieved was better than the indium seal used at T2 M9. He feels there is nothing wrong with the flange due to the vacuum level.

1. Re-scraped M9 T2 flange after reviewing video of flange.

- Some indium remains on inside of counter bore of flange, indium hard to remove due to current tooling.

2. Installed rubber spring loaded blank off flange to prevent debris from entering M9 T2 port.

- Will be removed once Q1Q2 void is cleaned and indium blank off plate is tested and prepared for use.

3. Continued cleaning of M9 Q1Q2 void.

- Attempted to wipe residue from bottom dead center of B1 15"knife  flange.  Did not fully clean, R. Kuramoto observed a thick viscous residue, "like tar"

- Started vacuuming of M9 Q1Q2 void

Scraped M9 T2 flange, removed what little indium was left on flange.

- Completed two passes, some indium still remains on flange. R. Kuramoto deems this sufficient for now.

- Scraping tool did not fit properly over flange, was forced into place and had to be pried off when scraping finished.

- Will temporarily blank off with rubber sealed blank off plate until area is cleaned of debris. Semi permanent blank off to be installed by end of week.

- See videos of flange scraping in Remote Handling group folder.

Work on blank off of M9 T2 started: Cleared away blocks making up bagging bunker. R. Kuramoto took some initial photos of the M9 T2 area post Q1Q2 removal; See Remote Handling network drive for photos.

G. Morris posted photos of M9 Q1Q2 just after removal from beam line 1A. Click here for link: http://trshare.triumf.ca/~gmorris/BL1A/M9/2013.3.5/

Removed M9 Q1 Q2 from beam line 1A via crane and transferred from beam line to radiation waste storage.

Magnet craned out of position in front of T2 monolith and then placed into bunker next to work site.

- Bunker pre-lined with plastic enough to envelope magnet.

Magnet craned over to radioactive storage and landed in south end of storage pit.

- Magnet did not sit on pit floor.

- Supported by a length of pipe on west of pit floor, Q1 leaning against south of pit wall and alignment bracket braced against a magnet on the east side of pit. See photos.

Preparing for M9 Q1,2 move:

1. Re-arranged/organized cables on top of magnet.

2. Re-configured bagging bunker for walk around access.

3. M. Kinakin replaced bullet bolt that was used for assaying.

- Removed new bullet bolt from magnet and decontaminated

4. Fully collapsed M9 Q1,2 vacuum box

- Q1 front flange up against T2 flange, appx .25" clearance between Q2 spring eyes and B1 vacuum box.

- Helium line appears to be sticking out under B2

- See above and below photos.

5. Disconnected some kind of electrical line from M9 Q2.

- Was secured and pulled off from magnet; see photos below, before & after.

Successfully stacked old m20 q2 q2 magnet assembly on top of old M9 Q1 Q2 magnet and M11 septum magnet. See photos.

- Done to create room for current m9 Q1,2 magnet.

- Used 6' remote handling bridge on north end of open pit for shielding.

- Fields around railing/pit were around 460 µSv/h.

Old blank off, taper pins and dust cap were placed into lead flask.

- Radiation levels of pins not measured at this time.

Radioactive waste pit uncovered, red barrel with unknown contents taken out for assessment. R. Ralea from RPG determined barrel was too active to be removed from pit and therefore replaced into storage pit.

M. Kinakin took the aluminum samples from the two indium test rings and the stainless steel bolt taken from Q1 for analysis. Will return the stainless steel bolt when finished.

Removed Q2 15" indium seal ring, discovered seal contained rubber on both sides instead of indium.

- Some kind of oil residue seen at the bottom of the sealing ring and inside of the Q2 vacuum box. (Note: Oil residue was from downstream vacuum roughing pumps. They were connected when T2 M9 joint was leaking. Oil got into the vacuum pump back streamed into the beam line.)

- Probing of rubber seal showed it was still soft at the top and bottom while brittle on the sides near the beam plane (Small pieces broke away when pressure was applied).

- Ring measured 11 µSv on contact, 0.7 µSv @ 1/2 meter, no removable contamination.

Removed a stainless remote handle-able bolt from Q1 cover plate for assaying.

- Bolt removed from South East corner of top cover plate. See photo for location of removed bolt.

- Removed bolt measured 600 µSv on contact, 11 µSv @ 1/2 m, no removable contamination. Bolt placed in a marked lead vial for storage.

- Replaced with identical remote handling bolt in same location.

M9 Q2 15" pin drive was removed and disconnected.

- Pin drive retention screw had to be completely removed to be able to remove pin drive completely.

- Had to make tools to remove pin drive and retention screw, see photos.

- Retention screw removed with 3/4" hex socket with .010" shim inside to cause interference with 3/4 hex bar. Hex socket was then jammed on to screw to retain it. Part was then unscrewed and carried away with socket. 80 µSv on contact, 10 µSv @ 1/2 m, no removable contamination.

- Pin drive removed with double hook tool, left on stand next to steel blocks at magnet elevation.

- 93 turns to fully retract pin drive, 4 turns to completely remove retention screw.

- Q2 joint was pried open with a screwdriver wedged between B1 flange and indium ring. See photo for final result.

CUALCW system water loss was not from 1A triplet. Q15 Q16 held static pressure at 90 psi since 9 am until 17:00. Holding with very minimal change in pressure. Q14 reading 64 psi as of 17:00. D. Preddy informs all other systems leak tight.

M9 Q1 joint disassembled, blank off and pins removed.

- M9 Q2 joint pin drive retracted but was not removed. Pin drive did not contain the roll pin that aids extraction of the drive.

Determined M9 Q2 service stand supply connector was slowly leaking.

- Ball valve to the supply was leaking through allowing trace amounts of water through.

- System was bled again and pressure relieved, leak appears to have stopped.

Inspected M9 Q1 joint bottom bellows bolt lug and spring eye gaps.

- Bottom bolt is in tension, tried to move with tool and did not move.

- Observed spring eye gaps: 1/32" or less on West spring eye, 0.200" on East spring eye.

Cleaned up RH setup in preparation for moving bridge setup tomorrow.

Today, re-arranged electrical wiring on Q1 Q2 magnet away from Q2 indium joint. Cable bundles were bundled as neatly as possible.

- One of the klixon thermal switch wires broke off while the cable bundles were being organized. See photo.

Completed disconnecting water services from services stand to Q2.

- Supply connector (the connector that did not come off last week) came off with some effort, return connector came off with no effort.

- Appears to be a slow leak from the male hansen fitting supply side; leaking @ one drop every 11 sec. Also observed a very slow leak (> 2 min) on Q1 return side on magnet stand.

Beam lines group purged M9 Q1 Q2 magnets and water lines in preparation of disconnecting water services to those magnets, done in morning.

- Note: Q15 protueus paddle wheel was replaced after finding it was worn

Water connections at service stand partially disconnected.

- Q2 water lines disconnected, 1 Q1 water line is disconnected but stuck on hansen fitting. with continue on Monday.

- Photo showing stuck fitting shown below (fitting on the right).

Removed 8" rubber test rings from M9 T2 joint. Rings moved to RH warm cell. Radiation levels were 70 µSv on contact 1.7 µSv @ 1/2 m.

Bagging bunker was setup west of the T2 M9 work area, see photos.

Began disconnecting M9 Q1 Q2 services: Electrical and thermal switch connectors disconnected from service stand, water service lines for Q1 and Q2 remain to be disconnected.

Local and remote leak checks on M9 T2 area were done today to confirm leak; Leak was still present at T2 M9 joint. M9 Q1 and Q2 power supply leads were disconnected (C. Yee). Next task is to find the ground fault on the Q1 magnet.

Indium one piece blank off plate (TB22267) for blanking off assembly (TB22265) was submitted into shop today.

Completed remote handling/shielding setup over T2 M9, see photos for setup.

- Rad levels at 16' above Q2 were 1.2 mSv/h. Shielding was built up to 20' level, same as the opposite side to minimize exposure.

Started work on removing M9 Q1 Q2 magnets; area clean up and preparation, removing shielding above Q1 and Q2 and remote handling setup over magnet (moving blocks).

1. Covered T2 cooling package and top of monolith with plastic sheeting.

- In addition covered 1A triplet shielding as well.

- Installed 1AS1 18' shield block after sheeting was laid down.

2. Discovered 1A Q14 indium ring thermocouple (TW# B1-378) & thermocouple coil circuit #1 (TW# B1-379) had cable insulation damage. Damage was down to bare wire.

- Wires located under east side of cooling package. See photo.

- Wires repaired with black electrical tape.

3. Vacuum started on T2 volume @ 10:47, roughing pump only.

- @ 11:15 vacuum pressure leveled off at 1.5 T (1ACG4 reading). 11:15.

- @ 13:30 the roughing pump blower package was turned on.

- @14:45 vacuum level steady at 250 mT (1ACG4 reading) .

4. Uncovered and partially set up over T2 M9, Q1 Q2.

- This setup is similar to 2011 and 2012 setups.

- 1A Q12 and 13 were uncovered during setup and a visual check for water leaks was done. None were found.

- Setup uses two 12' x 6' x 4' blocks with 18' x 6' x 4' resting on top, spanning the joint; See photo.

- Will continue with set up next day.

Beam lines took measurements of top of T2 using Leica Total Station. Required no crane activities over 1A blocks.

Today: D. Preddy completed another power test on 1A Q14, 15, 16 after all iron/steel shielding was restored. Magnet power and steering supplies were checked and O.K.ed. R. Kuramoto deems triplet repair job completed.

Tomorrow: B. Gasbarri and J. McKinnon want to take measurements of the T2 monolith to verify its position and compare with past data, no crane activities are to occur while this is being done.

Restored 1A triplet shielding and removed RH shielding.

1. Moved severed asymmetric steering cable on Q14 so as not to touch the coils underneath and the cover plate above it.

- Job done through RH bridge through floor tile and 6' tongs.

- Cable end pictured in center of photo toward left of magnet.

- Replaced cover plate, checked for water leaks, none found.

2. Restored Q14 shield block.

- J. McKinnon performed power test on triplet (Q14, 15, 16). Tested okay.

3. Restored triplet shielding. See photos.

- 1st layer restored.

- 2nd layer restored.

- Photo of temporary bunker for triplet shielding. Bunker was located East of T2.

Uncovered radioactive waste storage pit to see contents. Assessing viability of moving contents inside to facilitate storage of M9 Q1 Q2 magnet. See below for some photos.

Additional photos are on the remote handling group drive.

Cut and removed asymmetric steering cables from Q14 and 16, cables are no longer resting on magnet power bus bars.

Cut short sections left on magnet and connector block. North connector block left in place. Short cable section on magnet insulated with fiber glass insulation, see photo.

- J. Mckinnon severed cables and removed unused sections. Accumulated dose for job: 0.27 mSv.

- Respirator cartridge dropped into beam line trench, see photo (on top right corner of Q14 magnet photo).

- Rad fields were the same as before. See previous survey maps for levels. Q14 rad levels, Q15 rad levels, Q16 rad levels.

Photos of Q15 before and after cable removed, note bus bars at top of photo.

D. Preddy performed power test, ground fault persists at same resistance (magnets now at 250 Ohm Q14, 3.5 kOhm Q15). Doug deems it okay to run triplet in this state.

No water was found on magnets during final inspection. All three magnets were uncovered and visually checked for water before replacing dust covers.

- Booster pump was running.

- Q15 & 16 shield blocks back in place.

- Q14 left uncovered at this time, remote handling bridge still present in area. Shielding still needs to be fully restored.

Restored shielding over 1A triplet chase.

Uncovered Q16 and set up RH bridge with lead blankets over Q16. 

Cut Q14 and 16 asymmetric steering leads off north side pyrotenax connector block.

C. Ballard unbolted Q16 asymmetric steering lead from Q16 working through RH bridge floor opening.

- Rad levels through RH bridge were 2 mSv/h.

- Vacuumed tops of 1A triplet blocks and T2 area.

- Total time for jobs: 1.5 min, accumulated dose 0.04 mSv.

Rad survey map from last Friday (25 January) here.

Found exposed thermal switch cable in triplet service chase.

- Fibre glass outer sheath was damaged leaving 5" of exposed cable. See photo below.

- Cable found under corner of shielding block.

- Fixed with black electrical tape, each wire individually taped, 9 wires in total. See photo.

Found Q15 thermocouples were touching water lines near yellow connector was exposed and contacting waterlines.

- Insulated with nomex paper to isolate wire/connector. See photo.

Reconnected thermocouple from 2012 and jammed thermocouple head between water lines. See photo.

Wires were moved again to see if the resistance had changed after applying fixes. Resistance to ground stayed at 4.8 kOhm.

Triplet booster pump turned back on by R. Kuramoto and D. Preddy. No problems.

Q15 power supply was reconnected and tested to 800 A. Regulator voltage at 9 A, load voltage at 60 V.

- Ground fault interlock re-enabled by C. Yee in Q15 power supply.

- Ground current measured at 20 mV (through power supply ground shunt).

D. Preddy feels power supply is okay to operate. Power supply currently off and locked out, booster pump left on. Will prepare to restore service chase shielding and uncover triplet magnets to remove asymmetric steering wires.

Today: Uncovered 1A triplet cable chase and reconfigured shielding. D. Preddy will continue with diagnosing ground fault on Monday.

Photo of uncovered cable chase shown below. Note that steel blocks with rust (in middle far left of photo) are contaminated.

Continued with work on finding ground fault on 1A triplet;

Uncovered Q15 & 16 to 1AS1 area. See photo below for setup.

Disconnected last years thermocouple cable (coil circuit #9) at connector, no effect on ground fault.

- Removed connector cable rad levels: 10 uSv @ 0.5m 100 uSv on contact. No removable contamination.

- Cable stored in hot block storage.

- Will re-connect in future date and left in 1A service chase.

Q15 ground fault appears to be in the cables running into the triplet service chase. Moving beam spill monitor cable (BMS #57) appeared to have most effect on resistance in ground fault.

- Chase and cables shown in photo.

- Wiggled beam monitor cable, resistance varied from 4800 ohm to infinity.

T. Moskven disconnected BMS #57 at control rack.

- No change to ground fault resistance, at 4800 ohm.

- T Moskven reconnected BSM control cables after days work was completed.

Compared Q16 power supply to ground for reference.

- Disconnected asymmetric steering power leads (1ASM 11A & B) to Q16 and disconnected Q16 power supply.

- Resistance measured at 0.470 M ohm from coil power lead to ground.

- Reconnected magnet power supplies after.

Discovered that the aymmetric steering leads (pyrotenax cable) on north side of triplet magnets feeding Q14 and Q16 are disconnected at Q16 power supply.

- D. Preddy recommends leads are unbolted at magnets. Leads appear above the four bus bars in photo.

Q14 resistance was at 250 ohm, Q15 resistance varied between 4800 ohm and infinity.

Continued work on finding ground fault in 1A triplet magnets;

D. Preddy connected ohmeters to 1AQ14 & 15 power supplies with power leads disconnected. Ohmmeters were connected from magnet power leads to ground (pwr supply chassis).

- Q14 read 250 ohm and Q15 read 3 ohm.

- Disconnected power leads on Q14 and Q16 steering magnets. No change to ground faults.

Systematically moved wires off of magnets to find ground fault

- Moved north side asymmetric steering wire on live bus bars, no change

- Moved beam spill monitor (#57) cable, saw fluctuation in resistance on Q15.

- Moved disconnected thermocouple wire (from last year) on Q15, resistance change was observed.

- Moved thermocouple cable on coil #11, resistance change observed. No change on coil # 5.

- Resistance varied from 3 ohm to infinity.

Replaced RH bridge over Q15 shield block to facilitate re-installation of disconnected thermocouple.

- Removed RH bridge over Q15.

- Re-installed Q15 shield block.

- Re-installed 8' bridge over Q14 space.

- J. McKinnon reconnected thermocouple connectors & bound with Ø1/16" aluminum wire before covering. See photo.

Q14 re-covered with shielding.

- Cover plate on Q14 replaced.

- No water was found on beam line floor.

1AQ14 shielding restored and two lead panels replaced to cover T2 monument. See photo.

Tomorrow:

- Uncover Q15 # 16 to find ground fault.

1.5 day work delay due to plant group unavailable on the 21st of January. Gardner air compressor was being moved.

Today:

- Moved bridge off 1AQ14, cleaned and relocated.

- Uncovered 1AQ15, set up bridge over magnets, downstream of 1AQ15. Completed at 14:15.

Radiation survey map here: BL1A Q14 Q15 Uncovered

- Two magnets exposed, fields are higher (1200 uSv/h vs 600 uSv/h). Cover plate still on 1AQ15, see photo.

- Waiting for D. Preddy to complete work.

Completed uncovering shielding and RH setup over 1A Q14 triplet area, see photo for RH setup.

- D. Preddy disconnected coil #1 thermocouple on Q14 in an attempt to clear ground fault, fault still present.

- Moved three asymmetric steering magnet cables to see if ground fault cleared, no effect.

- D. Preddy will contact D. Louie for power supply issues, will contact RH when job complete.

Radiation survey map here: Jan 18 1A Triplet Area

Moved 18' blocks away from triplet area in preparation for uncovering triplet. Plastic laid down up stream of t2 target station for short term storage of 6' layered blocks.

Job completed today and shielding block over valve restored.

- He leak checked valve and accessible up stream joints, no leaks found.

- J McKinnon checked power supplies for nearby steering magnets before and after covering valve. supplies working ok.

continued with o ring replacement, replaced all relevant o ring seals on valve (valve body seal and actuator arm dynamic seals).

- valve re installed and services reconnected.

- valve cycled and checked; valve, limit switches ok.

- started T1 roughing pump at 15:25, will pump over night.

- RH setup and tools still on beam line, valve area not yet covered.

Assisted vacuum group with removing 1AVA8:

- uncovered valve area and set up remote handling bridge over valve.

- shut off pneumatic supply to valve to render valve in mid position (shut off valve in 1A tunnel). disconnected electrical services and air supply for valve.

- undid the two captive RH bolts holding top half of valve body. valve body was then removed and bagged. note that gate assembly is free of valve body, body is light enough to lift out by hand.

- valve swiped, 300 to 700 CPM found on removed portion of valve. level inside valve at beam line was 6 mSv. fields at bridge not higher than 400 uSv, see survey map.

work will be continued by vacuum group.

Shielding around m9 t2 restored as of 11:45, vacuum levels still the same since 19 October.

- Work permit returned.

- A dose record of the job is attached as a spread sheet. Total dose for all workers is 1.89 mSv for the job.

- A Small gap in shielding near T1 filled in by plant group in addition to the shielding restoration (neutron radiation).

Today;

Restoring shielding at M9 T2 area and cleaning up RH setup.

- RH workbench, pole tray and bridges removed from work site.

- 18' x 6' by 3' bridging block removed (at 14:25) to reveal the T2 monument. No apparent change in vacuum, will monitor as shielding is restored.

- Magnet power tests completed by beamlines group, no issues reported.

- Rubber testing ring installed between M9 Q1 and T2, see photo.

- Spring eye gaps appear to be the same as on Friday (after 48h), see photos and video.

Work continues re covering the M9 T2 site tomorrow.

Today I picked up two 2FT x 4Ft x 0.125" thick strips of stock EPDM and BUNA-N (Nitrile) material from BC Rubber Supply.  A copy of the Packing Slip is attached.  Here is the information from the Sample Sheet:

Nitrile 60 Commercial Grade

Type: Moderate Oil Resistance

Temp. Range: -30 to 190 (does not specify C or F... assuming C)

Ozone Resistance: Poor

Tear Resistance: 240 lbs/in.

Elongation: 500%

Tensile Strength: 1700 psi

EPDM AB-563 Premium Grade

Type: Excellent thermal & Chemical Resistance

Temp Range: -40 to 250 F

Ozone Resistance: Excellent

Tear Resistance: 145 lbs/in

Elongation: 500%

Tensile Strength: 890 psi

Sample preparation notes:

- Rectangular cross-section rings of this material were cut by hand using a compass-type rotating blade cutting tool on a work bench.  The process of cutting the rings to get the cross section as even as possible all around was finicky and required several attempts.

- The rubber rings cut from the stock material were nominally 8.040" OD X 7.66" ID x 0.125" thick, but this varied likely within +/- 0.020" each on the OD and ID due to the lack of precision in the cutting process.

- In the end, the final rubber rings cut were adequate to fit in the 8" double-sided aluminum carrier ring seal grooves without falling out.  For the future, a rule die would be best for cutting the samples and one should be made to prepare the next planned set of test samples.

- The strips were cleaned with Methanol.

- Two 8" double-sided aluminum carrier rings were cleaned and prepared, one packed with EPDM and one packed with BUNA-N (Nitrile). 

- Break-away sample coupons for analysis of the neutron flux received by the 6061-T6 aluminum carrier ring material were notched into the carrier ring fins with a bandsaw and deburred.  Two coupons nomially 0.25" x 0.25" x 0.125" thk were prepared for each ring.  These coupons will be broken off for analysis upon retrieval of these test samples.

- A make-shift lifting yoke to allow us to lower the rings to their resting place over the M9/T2 flange was prepared with and aluminum strip and bail wire (see attached photos).

Our plan for Monday Oct 22nd is to lower the two test samples on their lifting yoke and bail and rest them above the M9/T2 flange before covering up the area with blocks. 

The date and time of insertion will be recorded and samples will live there and receive operating dose from the beam and T2 target until the next time the M9 T2 area is uncovered and we can retrieve them for analysis and testing. 

The reason the 8" aluminum double-rings are used is because we plan to build a vacuum leak test jig using the standard 8" spring-loaded knife edge flanges typical of the designs at the M9T2 and M20T2 joints. 

The irradiated samples will be tested in this jig and compared to samples prepared using the virgin (non-irradiated) material  A test plan will be written to encompass the exact set of mechanical tests the samples will undergo to compare them to the virgin baseline.

Today:

Cleaned up work site and removed extraneous poles and tooling. Radioactive parts stored in lead flask now located on TNF.

- Two pins, an RH bullet bolt and indium ring (tb22148) were put into lead flask for storage, flask now located on TNF.

- Took photos of spring eye gaps and some video inspection, looks roughly the same as yesterday (see photos).

- Installed a dust cover over the east spring pin (see photos).

Looking at placement of indium rings loaded with EPDM and Buna N at joint for radiation exposure. Will install the test rig on Monday & clean up site for covering up.

Today:

Completed leak check of M9 T2 area: joint(s) are He leak tight. Remote He lines checked as well, see attached.

- Indium blank off ring was cut free from the string tethers.

- Removed extra tooling and equipment, West side pin threaded cap installed. East side needs new capping device since the lean of the pin is beyond installation parameters.

- Vacuum pressure still running higher than normal but stable (see previous e log).

- Water leak in the M9 Q2 magnet return header was discovered. Very slow leak (> 10 minutes per drop). See attached photo and videos on RH group drive.

Cleanup continues tomorrow.

Yesterday:

Installed indium blank off at M9 T2 joint and pumped down at 15:20 to 15:45 overnight. 1ACG7 (T2 vacuum pressure) reads between 6.0E-3mT and 2.0E-2 mT as of 8:15 today.

- Before installing, an attempt was made to set the bellows in a position to correct for some of the misalignment. This was done by closing the joint with no ring and pinning the east flange ear and leaving it for ~1 hour.

- Blank off installation began at 12:30

- A universal joint installation tool was used to install the East pin. This was due to the very small gap available to install the pin on the East side. The east side of the flange was also pried upon in order to close the east side of the joint. As a result the pin leans North once installed. West pin was installed with no issues.

- Installation finished at 14:30 (roughly two hours, not including flange prep work)

- An inspection after installation revealed the lower lug to be in tension an hour after installation of the pins and blank off.

- Spring eye gaps on installation appeared to be 0.05" to 0.06" on the west side and ~0.2" on the east side.

Will be doing inspection and leak check later today.

See attached.

See inspection notes attached for failed M9T2 double-indium thru-ring TB22148, inspected on Oct 15th 2012.

Ring was approximately 3 mSv/hr on contact and 100 uSv/hr at 0.5 m.

Total dose accumulated during inspection on dosimeter 122 was 0.1 mSv

Today:

- Removed pins and removed indium through ring. Joint fully open at 14.5 to 15 turns of retraction mechanism.

- Did initial video inspection of T2 and Q1 flanges, some residual indium on knife surfaces, did initial scraping of T2 flange. (see videos on RH group folder)

- One blank off prepared with indium ready for installation.

Will continue tomorrow with Q1 scrape and re inspection.

Joint repair continues.

Leak Check:

- Local leak check performed around area of T2, M9-Q1. All seals other than T2 Q1 were leak tight. Largest source of leak was the T2 Q1 joint area.

- Leak check done in quadrants around joint, response times were <2 sec of applying helium. Leak detector also responded when He probe was near joint (before actually applying He).

Video and Physical inspection:

- Bottom weld lug bolt found in tension/captive (ie. not free to move). Confirmed static by poking bolt. (Videos of this in RH group folder).

- Top weld lug had > 0.2" of gap.

- East and West pins seen leaning slightly toward North (toward Q1).

Loading Test:

At 13:30 a load test was performed to observe the effects of loading nearby blocks around T2 (see photo). Two 12 x 6 x 3 shield blocks were stacked one on top of the other and vacuum was observed, one then the other. There was no observable effect on the vacuum each time. Bottom weld lug bolt was still frozen when poked.

Blocks were replaced to their original locations once test was complete.

The T2 volume was vented at ~14:15 in preparation for disassembly to be performed on Monday.

Today:

Bridge setup complete; Noticed 12 x 3 x 3 block when placed on top of several other blocks rocked when placed down.

Took initial photos of joint: west side approximately 0.05" to 0.06" gap, east side 0.20" to 0.220" gap. Joint appears to be the same as before. See photos.

Will do visual/video inspection and leak check tomorrow morning.

Remote Handling plus support groups are currently attempting to install and commission indium vacuum seals into the following M20 front-end joints:

- T2/Q1

- Q2/Scraper

- Scraper/T2

The first indium joint installed was at T2/Q1 during the week of May 14 to 18.  Rubber seals were installed at the other two joints.  The system was leak checked on Tuesday May 22 and a suspect leak response was detected. 

The details of the installation and the leak check are in the attached .pdf e-mail dated 23 May 2012.

Today (Thursday 24 May 2012) the T2 volume and M20 front-end vacuum system were leaked checked with rubber seals in all aforementioned joints by RH group and Vacuum Group.  The results are listed below:

The test equipment consisted of a long Remote Handling pole with a copper helium applicator line attached to the end, joined to a long plastic line extending up the pole to the RH operator above. 

The plastic line was kinked with a zip-tie to cut off the flow.  To engage the flow for each test, the zip-tie was removed and the kink was opened. 

This would result in a burst of helium of a pressure you could feel easily on your face for approximately ~1s followed by a steady, very low flow just detectable on the cheek / tounge. 

The Varian Leak Detector was used attached by Vacuum Group to the T2 and M20 front end volume.  Edi Dalla Valle monitored the leak detector and communicated to Ron Kuramoto via headset radio.

The test started at 11:15 am, 1ACG4 20mT, 1AVA8 closed.

1) M20 Beam Blocker Top Flange (Top of T2 Monument)

11:15 am

Base leak rate 1.5 x 10-8 atmcc/sec

10 second spray of helium

No response after 2 min.

2) M8 T2 Blank-Off Flange

11:30 am

Base leak rate 1.5 x 10-8 atmcc/sec

5 second spray

First reponse after 30 seconds

Peak at 2 minutes, 4.1x10-8 atmcc/sec

3) M20 Q1/T2 Flange Top-Dead-Center

Base rate 1.7x10-8 atmcc/sec

5 second spray

First response after 40 seconds

After 60 seconds, 2.5x10-8 atmcc/sec

Peak at 2 minutes, 3.3x10-8 atmcc/sec

Recovery beginning after 2.5 minutes

4) M20 Q1/T2 Flange Bottom-Dead-Center

Base rate 1.7x10-8 atmcc/sec

5 second spray

First response at 45 seconds

Peak at 3 minutes 3.0x10-8 atmcc/sec

*1ACG4 read 16 mTorr at 11:55 am

5) M9 Q1/T2 Flange Top-Dead-Center

Base rate 1.6x10-8 atmcc/sec

5 second spray

No response after 3 minutes

6) Downstream T2 / 1AQ14 (Collimator B Area, see attached photo of Ron Kuramoto applying helium at this area)

Base rate 1.5x10-8 atmcc/sec

5 second spray

First response after 10 seconds

3.3x10-8 atmcc/sec at 1 minute

Peak at 1m 45 sec 3.6x10-8 atmcc/sec

7) M20 Q2/Scraper

Base rate 1.6x10-8 atmcc/sec

5 second spray

First response after 2 minutes 1.7x10-8 atmcc/sec

Peak at 2.5 minutes 1.8x10-8 atmcc/sec

This leak check confirmed suspicions of helium drift to the known leak at T2 / 1AQ14 joint on the T2 monument. 

The delayed leak response seen on May 22nd at M20 T2/Q1 is very likely drift of helium to this known leak based on these measurements, and not an actual leak at T2/Q1.

Edi Dalla Valle re-confirmed these leak check results with standard remote helium line tests.  His notes for these tests are scanned and attached.

We will proceed tomorrow to make up the T2/Q1 joint with the same ring and pin combination as used May 17 to May 22 2012.

4" indium flanges at the 2C rad hard valve were cleaned of the remaining indium by C. Ballard. Both upstream and down stream flanges were done, ready for installation of new valve.

Reinstalled ceramic insulators #6 7 8 to Q1 magnet by C Ballard. #6 and 8 went on with no issues. The copper tubing on insulator #7 had to be bent to match the new position of the re-brazed #7 fitting. This may have been due to the removal of the inner and outer conductors (the two copper plates that clamp the two coils together) during yesterdays repair which shifted the position of the coil. See photos.

Old #7 coil fitting removed, replaced and re-brazed today by M Good. Insulators ready to go back on to magnet coils to be pressure checked.

Image P1020013.JPG shows #7 coil fitting before removal. Heat shielding in the form of small aluminum sheets were installed to protect the magnet and electrical wiring.

Image P1020028.JPG shows new #7 fitting with all tools removed from area.

Insulators # 6,7,8 removed from Q1 headers late afternoon by C Ballard. Ready for removal and re-brazing of #7 joint some time today.

Warm cell reconfigured for water leak repair at coil termination. Radiation surveys done. M20 Q1 ready for removal of insulators.

Attached photo of warm cell as of Tuesday morning.

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