test

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.

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.

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.

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).

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

Set up shielding canyon for M9 laser tracker job.

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

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.

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.

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.

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.

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

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.

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. 

 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.

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.

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.

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.

 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.

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.