The linear actuator used for the Y-motion motor assistance on the spare telemanipulator was replaced and tested. It was observed around September 2021 that the former one which was installed was causing fuses to blow for the main 120 VAC power supply in the control box. After some troubleshooting, it was determined that the linear actuator itself did not operate smoothly - it was suspected that this caused motor overload due to additional friction. This suspicion was confirmed by operating the linear actuator independently with a power supply and measuring current draw. The part has been replaced by Thomson PPA90-58B65-08NXXX. Note: this part took over 1 year to arrive since it was first ordered. The spare telemanipulator is confirmed operational.

Update 2024-09-11: noting that this was for serial number 9351

Adam Newsome wrote:

The linear actuator used for the Y-motion motor assistance on the spare telemanipulator was replaced and tested. It was observed around September 2021 that the former one which was installed was causing fuses to blow for the main 120 VAC power supply in the control box. After some troubleshooting, it was determined that the linear actuator itself did not operate smoothly - it was suspected that this caused motor overload due to additional friction. This suspicion was confirmed by operating the linear actuator independently with a power supply and measuring current draw. The part has been replaced by Thomson PPA90-58B65-08NXXX. Note: this part took over 1 year to arrive since it was first ordered. The spare telemanipulator is confirmed operational.

 During this repair it was noted that the Y-axis electrical translation is locked out when the Z-axis is in the fully retracted position (i.e. the Z-axis limit switch engaged). I have made a note of this in the operator manual (CRLD-1046-B Rev1 ) which can be found in docushare collection 26780

NHC is 1.26 mSv/h inside approximately .5m from table surface, between manipulators

SHC 186 uSv/h inside approximately .5m from table surface and between manipulaotrs

The fields in the NHC after removal of Ferran's graphite sample is 238 uSv/h. This again seems to emanate for the items in the 5 gal pail...the copper tubing from the beam window or, as I mentioned in my previous elog, the peek samples. I did ask about removing these during the graphite sample removal but was told they were not "hot".

NHC was entered on April 17, 2023 for inspection and maintenance. Summary :

Compressible and non-compressible waste was loaded into a 55 gal drum and removed from the NHC. This same drum will be inserted into the SHC at a later date to be sorted, compressible waste compressed, and drum filled more.

Manipulator remote end tong cables checked. Tong cables didn't show any wear but both east and west had tong cables had hopped off the third highest pulley (see detailed write up . This was fixed by tying the tongs in the closed position to provide slack in the cables then inserting a t-handle through the wrist and offering the cables back onto the pulleys. Cable hopping is most likely due to aggressive ratcheting and releasing of the tong during operation.

Manipulator booting flanges were removed from both manipulators as it was previously found that  the booting interferes with access to the inside of the containment box so it could not be used. Flanges were remove to provide even more clearance.

Containment box cover removal arm - linkage fasteners were removed one at a time and blue locktite added then reassembled and tightened appropriately to allow arm to swing freely (see detailed write up) . Lack of locktite during initial assembly was allowing fasteners that pass through bushings into the linkage arms to loosen over time/cycling.

Exhaust pre-filter changed.

Target insertion jig - The target insertion jig was rumored to had a missing fastener. A loose nut was found that appeared to belong to it but after much inspection a location for it could not be found...i.e. all parts appeared to be counted for. During this inspection it was noted that some over the fasteners in the main hinge were loose. Again these were removed one at a time, blue locktite added and fasteners tightened to allow proper movement (see detailed write up).

Window inspected for leak. No sign of any leakage from the "hot" side.

 TM4 with target TiC#5 installed has been leak checked and electric checked on NHC.

 TM4 with spent target TiC#5 electric check after moving from ITE to NHC.

 TM4 with new target SiC#45 installed has been leak checked and electrical checked on top of NHC.

The TiC#5 post irradiation inspection was done on Wed. June 14 and Mon. June 19. This target didn't have any obvious issues but it didn't produce much beam. The inspection revealed that the container was quite embrittled and showed significant damage, though it was not broken. The FEBIAD grid looked fine, despite the large anode current draw (indicating that current was flowing elsewhere). The gas line looked fine though the gas injection to this target looked as if it wasn't connected. But there was a plug on the unused line, so it must have been correct. No other obvious signs that would explain the poor performance. Pictures are can be found here https://documents.triumf.ca/docushare/dsweb/View/Collection-37913

 TM4 with spent target SiC#45 was disconnected ITE  and an electrical check made right after moved on NHC. 

 An electrical check was made after new target installed on TM4.

Looked at SiC#45 in the hot cell. Looked very clean, no deposits on the heat shield or other components. Target also looked very straight. Only issue we saw was sparking marks on the EE side that faces the ground electrode, in several spots. This target had a bout of sparking when ramping up the protons, so I guess that was the location. Will look for matching spark marks on the ground electrode next time TM4 is in the hot cell. Forgot to take picutres...

TM2 TiC#6 post run electrical check has been done at TCS. See attachment

Nb#10 has been installed on TM2 . electrical and leak check on HS line are good. See attachment.

PIE on TiC#6 was done in the NHC. The target assembly looked brand new when we took it out, no heating spots or deposits (pictures on docushare). Online we measured a 400kOhm connection between TGHT-TBHT-COIL to HV common (TGHT and COIL shorted in TM2 service tray) and anode was unstable above ~300V. After the module move and before the target removal David found TGHT-TBHT-COIL was a dead short to HV common and the anode was at 39kOhms to HV common.

1. Wanted to see if the TGHT-TBHT-COIL short was on the COIL. Measured with ohmmeter the COIL lines to HS and got about 700Ohms. But with the target lying down the COIL lines drop and touch the heat shield so to do this measurement Chad had to lift the lines, which could cause them to touch something else. So not sure how reliable this measurement was. It jumped around a lot, saw 0L occasionally.

2. Measured both target legs and tantalum gas line to HS, got about 5kOhms repeatedly using the ohmmeter.

3. Meggered across the gas line insulator to the gas line going into the target and got open circuit at 250V, so the gas line wasn't coated.

4. Target container looked vaguely red in the areas where the target material was, otherwise still no deposits on the inside. The container was not overly crystalized as seen on the legs and end caps.

5. Some sparking marks on the EE and some slightly asymmetric deposits

Continuing Aug. 22 2023:

6. Found what looks like a hole in the insulation on the COIL, maybe the cause of our short? Found a corresponding line mark on the copper plates that hold the coil down but not sure if it is related. Pics on docushare.

7. Grid looks perfectly new. Where was that current going?

8. Copper plates that hold coil were loose and bolts that hold coil in just fell out as well.

9. What can be seen of the anode wire looks good.

 TM2 with new target Nb#11 has been E/L checked sitting on NHC.

  TM4 with spent target UCx#42 has been electric checked at NHCpost right after transferred from ITE.

 TM4 with new target Ta#65 has been E/L checked at NHCPost.

 TM4 with new target Ta#65 has been E/L checked at NHCPost.

Nb#10target has been remotely  transferred from NHC to SHC.