The T1-P2 (outlet) pressure transducer was replaced to address an erroneous signal.  The XTPAGE value now reads as expected.

The T2-P1 (inlet) transducer was also replaced to address a noisy (and worsening) signal.  Replacing the transducer seems to have had no effect on the XTPAGE values.  A possible controls issue is suspected and Jamie Cessford will be notified so that the matter is directed to the appropriate person.

No dose was incurred during the procedure.

The T2 target was moved from Position 4 to Position 0 at 11:15am so the profile monitor could be used during the development shift.

The T2 cooling package tripped regularly throughout the day on high flow while in position 0.

At 10:45pm the T2 target was returned to the previous running position: approximately 2mm above the nominal position 4 elevation (pot ratio fluctuating slightly around 0.799) so that beam could be run overnight.

The T2 target was exercised to position 0 around 6:15pm so that the T2 profile monitor could be used by operations.  The T2 water package was re-enabled when the target was in position 0, however this resulted in some trips of the cooling package.

Operations called around 7:45 to request return of the target to about 2mm above position 4.

The target position was re-set so that the position reading fluctuated roughly between 2.7 and 1.6 mm above position 4 (hovering roughly around 2.0 mm), and so the potentiometer reading was hovering roughly between 0.801 and 0.798.

The cooling package was re-started, and called operations to confirm the system was OK.

The T2 protect monitor was returned to the beam line using the shielded flask.  The alignment pin did not align with the hole in the vacuum flange, but could be aligned by hand by rotating the monitor assembly while it was hanging from the flange.  The protect monitor vacuum flange was bolted down and all services connected.  The T2 protect and profile monitors were checked by Dave Cameron (both OK).  Vacuum was pumped down and the cooling package started without incident.  After installation of the cap block the M20 beam blocker and the T2 profile monitor were exercised (both OK).  The updated target info, elevations, and beam spot measurements were delivered to the control room operators.

While the monolith was exposed the T2-MK2 target assembly lift hat was rotated slightly to match the orientation of T2 Protect and Col. A.  Hopefully this will improve the alignment for the next time the target is lifted with the flask.

When beam was started in mid-April, it was observed by Operations Group that with the beam centered vertically within the protect monitor, the profile monitor showed the beam spot to be approximately 6mm high.  The protect monitor was changed during the shut-down due to a failure in November 2013, so it was suspected that the new protect monitor was not aligned properly.  The beam spot appeared to be dangerously close to the top weld of the target window so it was decided the target assembly would be removed for inspection to visually confirm the suspected misalignment before increasing beam current.  Since start-up, a maximum beam current of approximately 30 micro-amps had been used on the 10cm beryllium target in position 4 which previously had not seen beam.

On Monday April 28th, the T2-MK2 target was transported from the beam line to the hot cell.   The target assembly was measured to be 298mSv/hr at 0.5m.  A clear beam spot was visible on the entrance and exit windows of the target approximately 6mm high of vertical center (photos attached).  Target and profile monitor elevation measurements were conducted, and confirmed those previously taken on the target by Tom Lyth.  This exercise confirmed that the position 4 target and profile monitor were aligned properly, and that misalignment of the protect monitor was the cause of the beam being high on the target.  It was then decided that the protect monitor assembly would be removed and a new monitor cassette installed to remedy the problem.

On Wednesday April 30th the T2-MK2 target was returned to the beam line and the protect monitor assembly was transported to the hot cell.  A maximum field of 15mSv/hr at 0.5m from the protect monitor was measured.  Elevation of the monitor cassette was checked, and was found to be 6.8mm above the elevation of the position 4 target.  The monitor cassette was removed from the assembly.  The cassette was approximately 100μSv/hr at 0.5m and 2mSv/hr on contact, with 200cpm measured from a swipe of the outside surfaces (not the inside plates).  The cassette was returned to Probes Group for possible use in the future.  A new monitor assembly was supplied by Scott Kellog on Friday morning with the 6.8mm adjustment.   The monitor was installed on the protect monitor assembly.  Elevation was checked and found to be within 0.5mm of the target elevation.  After installation an electrical check was performed by Dave Cameron and Mike Russel.

The protect monitor assembly is ready for installation in the beam line on Monday morning.

The T2-MK2 target (currently installed in the beamline) was moved from position 0 to position 4 (10cm Be) using the portable control box.
The T2 cooling package was started after moving the ladder.

There was no change in the BL1A vacuum.  The T2 expansion tank water level dropped slightly, as expected (around 1/16"), and was refilled to ~1/4" above the high level sensor top nut.

30 micro-amps of beam was put down BL1A and the T2 target and cooling system appear to be functioning normally.

 The T1 cooling package was started around 2pm today.  There was no change to the T1 volume vacuum during startup.

The package was inspected for water leaks: None found.

The demin loop flow (Q2) was adjusted to ~1.5gpm.

The target out water resistivity has reached 12 mega-ohm-centimeters after approximately 2.5 hours, indicating that the resin does not need to be changed.

T2 Profile Monitor actuation was tested today from the control room and all is working properly.  The position (IN / OUT) also displays correctly.
To my knowledge nobody has looked at this system, so it is a mystery why it suddenly started working.  This e-log will be updated if any explanation is found.

Actuation of the M20 beam blocker and T1 Profile Monitor were also tested and are working as expected.

The T2 monolith may now be covered.

Update:  A blown fuse in the control racks was replaced yesterday by Dave Cameron, which explains the change.

The resin can was removed from the T2 cooling package and transported to the warm cell.  A replacement can with fresh resin was then installed.

A 12' sling and the standard four bridle was used to prevent the crane hook block from hitting the mezzanine railing on the south side.

The T2 package was started and inspected for leaks - none found.

Although T2 resin can replacement was scheduled for the 2015 shutdown, a decline in conductivity (with beam off) was observed since the cooling package was started in mid-march.
(See attached XSTRIP plot showing gradual decline and then increase after resin can swap)

The T2 resin can will now be scheduled for replacement every 2 years (rather than 3).  It is still unknown whether the T1 resin can will also need replacing every 2 years.

The T2 profile monitor cannot be actuated from the control room.  When the solenoid valve that supplies air to the air cylinders is powered directly, the monitor moves in normally, therefore a controls issues is suspected.

Additionally the monitor position shows neither IN nor OUT.  This does not change when the monitor is at either limit.  Proper actuation of the target micro-switches has been confirmed.  The T2-MK2 target is currently installed, but this was also an issue in Nov/Dec 2013 with the T2-MK1 target installed.

Fault report #7276 has been filed, targeted at Cyclotron Controls Group.

The T2 P1 pressure transducer (Omega PX315-100GI) and T2 Q1 Proteus flow meter (0150SSTF3) have been replaced with new units to address issues with noisy signals.

Water detecting strips were installed around the T1 and T2 areas today with Doug Preddy and contractors from SMT Research.  Four sensors were installed at various locations on each cooling package.  Four sensors were installed on the top surface of the T2 monolith.  In addition, four sensors were routed for future installation at the T1 monolith (it is currently covered by blocks and requires cleaning and painting before sensor installation).

See the attached PDF for sensor ID numbers and placement specifics.

Photos are attached of the sensors installed around the T2 monolith and cooling package.

Bill Rawnsley completed an electrical check of the T2 profile monitor today from the Meson Hall mezzanine - All OK.  

The T2 cooling package was refilled and started.  There was no change to the T2 vacuum when starting the package.  While running, the package was visually inspected for water leaks - no leaks found.  

The lower air amplifier has also been started and is operating normally (the o-ring seal of the moisture trap on the amplifier inlet required cleaning and lubricating to seal properly).

David Cameron and Mike Russel completed an electrical check of the T2 protect monitor last week - All OK.

On the control panel on the mezzanine the "monitor in" lamp is currently illuminated which is incorrect (the monitor is currently out, and proper actuation of the micro switches was checked).  This problem started last year and did not seem to cause issues during 2013 running period.  

Operators were unable to move the T2 profile monitor to the in position from the control room.  This may be caused by a separate interlock that is not satisfied, or may be a new controls issue.  To confirm that the T2 target assembly is not at fault, power was supplied directly to the profile monitor air cylinder solenoid valve and the monitor traveled into position normally.  This will be investigated further before blocks are replaced.

After the monitor assembly was moved to the hot cell, electrical checks were performed by Bill Rawnsley which showed the same results as when tested in the beam line.  A new monitor was installed (supplied by Probes Group), the tests were repeated, with all results appearing normal.  The monitor assembly was transported to the beam line this morning and installed at the T2 monolith.  All cables were attached and the flange was bolted down.

Bill was notified by e-mail and it was suggested that he perform one final electrical check from the mezzanine before the monolith is covered.

 The T2 Protect Monitor was transported from the beam line to the hot cell this morning using the transport flask.  The move went smoothly.  The only difficulty was locating the yellow flask alignment frame to the T2 monolith as the T2 protect holes on the yellow frame are tighter than for other devices.  It was necessary to remove four screws that secure the top flange of the T2 protect monitor assembly to the flange on the monolith.  These screws are stored on the top of the monolith in a labelled bag.  The T2 protect o-ring was in good condition, but was replaced anyways, and a blank-off was installed over the hole so that vacuum can be pulled on the T2 volume.  A maximum field of 15mSv/hr was measured at 0.5m from the monitor while lifting.

Probes Group may now begin testing / repair of the monitor.  Bill Rawnsley has been notified.

Photos attached.

Update (March 19, 2014):  Bill Rawnsley thinks that the damage was caused by mis-steered beam (not from water).  He points to the evidence of heating in the attached photo.

The T2-MK1 target was moved from the beam line to the target storage pit in position 4.  The target was measured to be 30mSv/hr at 0.5m.  The move went smoothly.

The T2-MK2 target was then moved from the hot cell to the beam line.  The target was 151mSv/hr at 0.5m.  For reasons unknown the target was slightly out of rotation when lowered into the beam line, and could not be fully lowered because the alignment pins were out of position.  It was not possible to twist the target while it was supported by the flask, so 2" aluminum standoffs were placed on the monolith flange, and the target was lowered onto the standoffs.  The target was then lifted without using the flask, the standoffs removed, the target rotated to match the locating pins and then lowered onto the flange.  It is possible to adjust the rotation of the lift T flange on this target if the misalignment is found to be caused by the target and not the flange.

The new target information sheet was delivered to Ops, and XTPAGE 7L was updated.  Graham Waters was notified of the change so that he can update the potentiometer look-up values in the control system.

The target flask catch tray was cleaned using a wet wipe which had 11,000cpm on the 44-2 meter and 300cpm on the RM14 meter.  After cleaning, a dry swipe of the tray inside had 0 counts on the 44-2 and 100cpm RM14.

300cpm contamination was found on Isaac's coveralls and 150 on Ron's.  There was 6000cpm found on Ron's booties.  He had been working on the blocks around the T2 monolith, but had not been down to the monolith itself.  A request will be made for Plant Group to paint the blocks around the T2 monolith.

Water was drained from the T1 and T2 cooling packages, samples taken, and delivered to RPG.

All filters on the T1 and T2 cooling packages were changed except for the T1 demin. line filter which is hard to access and could not be properly drained.  This filter will be changed next shutdown when the area is more accessible while the resin cans are being changed.

The field from each filter was measured after removal:

T1 Target Water Filter:  180μSv/hr @ 0.5m, 8.26mSv/hr on contact
T1 Collimator A Filter:   0.86μSv/hr @ 0.5m, 0.61μSv/hr on contact  (same as background)
T2 Target Water Filter:   185μSv/hr @ 0.5m, 10.5mSv/hr on contact
T2 Demineralizer Water Filter:   2.10μSv/hr @ 0.5m, 30.0μSv/hr on contact

9000cpm were measured on Isaac's coveralls after completing this work, most likely from laying on the concrete blocks next to the cooling packages to access the filters.  Keith's coveralls had 300cpm.  Both pairs were bagged and taken to active laundry.  The filter cartridges on Isaac's respirator had 700cpm.  RPG was notified and Danka will do a gamma spec on the respirator filters.

The T1 and T2 cooling package water will be released after approval from RPG.

 After approval from RPG, the water drained from the suck tube, which was stored in a bucket in the RH lab active sink area, was released to the active drain.  Even after rinsing, the bucket still had a slight field from the base, so it has been labelled and will be kept in the active sink area.

 A water leak developed this morning from a city water supply line at a hose connection near the T2 expansion tank.  Water was observed to be dripping off the mezzanine onto the plastic sheet covering the T2 cooling package.  The leak has been stopped and the leaky fitting is being repaired by Carston Frasden.

The T2 cooling package was inspected: small amount of water on the top of the plastic sheet, no water visible below the plastic, and all package components were dry.
The T2 expansion tank level was checked: no change.

Water was purged from the T1 and T2 targets using compressed air.  The water is stored in a labeled bucket on the BL1A blocks near the T2 cooling package.  The bucket is approximately 100µSv/hr on contact and 10µSv/hr at 0.5m.  Isaac's coveralls had 500cpm on them after this job and were dropped off at active laundry.  Keith had no contamination on his coveralls.