The M9 beam blocker was returned to the beamline today using the RH shielded transport flask.  The top flange o-ring was replaced before installation.

After installation the "Lift T" assembly was removed, and electrical cable and air supply connected.  Correct functionality of the limit switches was confirmed with the control room.  Actuation of the beam blocker could not be tested at this time because control takes place through the M9 area ASU.

 The 10-pin thermal switch wire, 2-pin steering wire for Q2, and a 1/4" copper tube for remote helium leak check were installed through the service chase with the power cables and connected to the M9 service stand.  Approximately 10m of extra cable (2-pin and 10-pin) was coiled and left in the cooler section of the service chase after the first sharp bend.  The cables and the tubing are currently run as far as the vertical cable tray "waterfall" located near the M11 area.

 Laser tracker scan data from 2017 and 2019 attached as a backup.  Original files from Beamlines Group who also keep copies on \\trwindata\experimental support\alignment\T2-M9_data

The Q1Q2 water header (TB23481) was mounted this morning as per installation drawing TB23400.

Heat shrink tubing was applied to the B1 power cables (two positive, two negative) over the length of cable in the highest field which was showing some signs of radiation damage on the insulation.  The tubing used was McMaster-Carr PN 75665K932 (Clear PTFE, 4:1 shrink ratio, 1.0" ID before shrinking), as recommended by Syd Kreitzman.  Each piece of tubing is 4' long, and two were used per cable.  The first one was shrunk along its full length, then the second piece was only shrunk where it overlaps the first and the remainder was left loose.  This was done to minimize time required in the high dose area.

Hand-stacked concrete bricks were removed from the location where the new piping will run to the water header.  This is scheduled to take place between July 6-8

 The M9 Q1Q2 magnet assembly lift beam has been installed according to drawing TB23401.  The side-to-side as well as beam-axis direction adjustment features were tuned so that the assembly is level when lifted.

Aug 5, 2020 update:  All fasteners on the lift beam assembly have been torqued according to the specification on drawing TB23401

The diagram below shows the wiring for the two connectors on the service stand (the wires running from the stand to the power supplies.  (see TB23400 for details)

 Mike Vogel reported that alignment of the Q1Q2 assembly w.r.t. the T2 and B1 flanges was completed on July 7.  This was performed in the test stand with the flange positions set to the measurements taken in the 2019 shutdown.  Alignment to the theoretical location was achieved within 0.1mm.

The axis of the Q1 and Q2 magnets were aligned to each other previously within similar accuracy.

The beam blockers for M9 and M20 were actuated, and vacuum was monitored to ensure no disruptions. Both actuation tests were successful. Motion was observed and no abnormalities noted. Cabling and air connections checked: OK.

Note: there was a safety interlock issue with M9 which prevented actuation - a relay or fuse was temporarily removed from the safety system ~10 years ago but it was not replaced. It was replaced for the purpose of this test, and then removed again.

The tubing for the helium wand inside the hot cell is broken and needs to be replaced. More tubing has been ordered and the job will be completed in the coming weeks.

Some oil was noticed around the hot cell window, on the control panel, and on the ground below the control panel. A leak is suspected.

Suggest tightening all bolts to specified torque along the window, and monitoring overflow oil level (position today was marked). If the problem persists, the gasket must be replaced. Note that the gasket should likely be replaced anyway as it has not been done for some time.

It was reported today by Peter Bratt that the nuclear ventilation system for the hot cell is not functioning. At this time, the cause of the issue is unknown. Remote Handling and Electrical Services are investigating. This e-log will be updated when the issue is resolved.

Update: the issue was caused by worn belts which had been smoking. The belts must be replaced.

Mechanical Services Group changed the pre-filter in the ventilation system on Aug. 29, 2022 as per work permit C2022-08-29-2.

It is recommended that Mechanical Services change the HEPA filter as soon as possible. These filters are on order with approximately 7 month lead time. 

Edit: as of 2023-05-03, the HEPA filter has been changed.

The HEPA filter in the nuclear ventilation system for the Meson Hall Hot Cell was changed and tested by mechanical services under work permit C2023-04-25-14.

They have given approval to operate again. The system is re-energized.

The recently removed T1-MK1 target ladder was flushed with city water for ~30s at all target positions. It was then purged with compressed air at ~5 psi for ~1 minute at all target positions. We then left the target ladder in pos5 to fully extend the bellows and allow it to dry overnight.

This ELOG will be updated as we progress with work done to dry the target ladder and eventually exchange the spent targets.

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UPDATE (Feb 02, 2024): in the morning, the target ladder was moved to pos4, and air was allowed to run through the morning, in the afternoon the ladder was moved to pos2 and air was ran. At the end of the day, the ladder was moved to pos 0 and air was ran through over the weekend.

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UPDATE (Feb 05, 2024): the following procedures were completed.

1. the air connections on the target ladder was replaced with the leak test/vacuum connections as per instructions.
2. LN2 was taken from the ISAC-I facility and used to perform two pump-down cycles with the Agilent He leak detector + cold trap.
3. First pumpdown cycle: 3min45sec to go from roughing to fine pumping, left for a total pumpdown time of1hr20mins, a relatively small amount of ice formed on the cold trap cylinder (see image).
4. Second pumpdown cycle: 2min30sec to go from roughing to fine pumping, 4min30sec to reach 1e-3 Torr, 5min to reach < 1e-3 Torr. 
5. Due to good pumpdown in the second cycle, we proceeded with leak testing: Baseling 1.0e-10 Torr-L/sec | ~1 sec He applications at 3.5 Psi directed at fittings/welds/bellows. Worse case measured leak was 0.9e-7 Torr-l/sec in pos 13 of fig 12 of Document 46600 (see taken image for detailed measurements at various locations).

We will prepare an update to the procedure to better log the leak rate measurements and update this ELOG/the procedure. Note that ice removed from second pumpdown was actually comparable to the first (see image, ice knocked off during cold trap removal), but total pumpdown duration (including leak testing) was ~4 hours for the second pumpdown. 

 UPDATE (Feb 13, 2024): see attached record with new template.

Feb 1 2024

Hand Pump observed to be losing pressure at full extension of cylinder, seals likely blown. Due to Enerpac P84 being an obsolete model, a newer model hand pump was ordered.

Feb 15 2024

Hand pump (Enerpac P84 Ultima) installed at Indium Extruder Station, observed to work properly in both directions of flow, deemed operational. 

A safety walkaround was completed for the Meson Hall Hot/Warm Cells.

The resulting spreadsheet can be found on DocuShare as Document-242733.

Main deficiencies identified:

• Hot Cells:
  • Pressure gauge reading is suspect
  • Operator station phone not working (resolved now)
• General:
  • Lifting equipment has overdue inspection

Action has been taken on all deficiencies.

The following maintenance tasks were completed on 2024-11-29 by A. Newsome, A. Kong, A. Tam, M. Dalla Valle:

• Warm cell right window water level topup... the water level was a couple inches lower from the top. Using a tube connected to the nearby sink, the level was topped up fully. See attached before/after picture.
• Hot cell oil level checks:
  • Right side OK. See attached picture.
  • Left side very low compared to July 2022 measurement (suspect internal leak?). The oil was topped up. See attached before/after picture.
• Hot cell scissor table pump oil level check - M. Dalla Valle notes this was topped up approximately July 2022. The table was operated and functioned normally, did not sound concerning. The oil level was visible and acceptable.

Still to do, next maintenance check-up:

• Check HC atmospheric pressure differential gauge
• Lubricate HC turntable (planned for 2025 winter shutdown when target assembly not present)
• Lubricate all telemanipulators

Diagnostics group (Shengli Liu) noted a lack of connectivity between control panel and T2 Protect Monitor via the high voltage cable. Upon inspection it was noted:

• The cable was very brittle due to radiation exposure and it was cracking in multiple places
• In the SHV connector, the pins were slightly bent (bending them back into position seemed to rectify the connectivity issue).
• The cable was bent at the strain relief junction

RH Group has advised that Diagnostics replace the entire cable as soon as possible. For now it appears to be working.

2018 Cyclotron lid up problem. Station #9 was  found to  have the motor wires along the beam plain had damaged wire insulation. There were bare wires in the conduit resulting in the wires shorting out. The wires were repaired with a quick short replacement. Lid went up for in tank work. After lid down the problem was investigated. We checked the radiation levels   at all  of the stations to come up with a plan to determine witch of the stations had the highest levels. We found that stations 1,3,5,7,9, and 11 had the highest levels. Station 1 was inspected and all wires were replaced to the T elbow. Station 3 all wires were replace to the T elbow. Station 5 all wires were replaced  to the T elbow. Station 7 all wires were inspected and were in good condition and put back into place. Station 9 all wires including syncro were replaced all the way to the junction box. Station 11 motor wires were good, but the jog wires and the syncro were replaced to the pull box. All of the jog switches on stations 1,3,5,7,9,and 11 were falling apart when wires were inspected.  New switches were ordered and assembled. At the start of 2019 shutdown all jog switches were replaced on stations 1,3,5,7,9, and 11. After all the jack work was finished the jog switches were check and were working well.

Drained T2 cooling package water, collected sample and delivered to RPG.  Swapped resin can, refilled, and restarted cooling package.

After 6 hours can inlet at 10.3MΩ *cm, can outlet at 10.5MΩ*cm electrical resistivity.