On Sept. 14 2022, a 10kOhm 30W resistor was installed in each target station faraday cage, in line with the HV bias supply. This was an effort to reduce the current draw from the BIAS supply and protect the power supply controls cards which have been repeatedly breaking due to HV sparks (we think). In the end we still broke cards after the installation, so it doesn't seem to have helped. See below for details on the electrical side:

At 30kV, HV currents are around 100-150uA, meaning the voltage drop over the resistor is around 1.5V. When operating at higher voltages, with higher current draw, the voltage across the resistor could be over 2V and we could get into a situation where it would have an effect outside the normal adjustments needed on the mass separator. We made this decision based on the fact that the power supply's setting resolution is on the order of 1 x 10^-4.

When the resistance of the water changes, this affects the current draw from the power supply and this in turn affects the voltage over this resistor. Based on some sample numbers of running times, there is not much variation in the current except from sparks and if there is some issue, like water leaking between HV and ground. During normal running, the voltage change across the resistor should be less than 0.5V during normal operation. This is on the same order as the 8 hour stability of the power supply.

Helium cylinder and  Argon cylinder are installed in both ITE/ITW faraday cages , regulator for outlet pressure are not set yet.

TO ITE :  Argon bottle size 14"L x 4"D with SV2 connected at pressure 900 Psi ( 70 bar )

               Helium bottle size 18"L x 7"D with SV1 connected at pressure 2000 Psi ( 130 bar )

TO ITW: Argon bottle size 15"L x 2"D with SV2 connected at pressure 1000 Psi ( 80 bar )

              Helium bottle size 18"L x 7"D with SV1 connected at pressure 2000 Psi ( 130 bar )

An Neon cylinder size 20"L x 6"D  at less than 100 psi ( <10 bar ) pressure stored in the cabinet of ITW cage without connection

two gas line connection pictures are attached here for reference.

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".

The spent target assaying turntable was repaired. It was tested today with a load exceeding the maximum it would need to handle during rotation (100 kg). It works as expected and is ready for operation.

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.

ITW, ITE, ITW +ITE total , and low active cooling water return flow meter transmitters are inspected and calibrated.  Result:

ITW , PX-750-06Di , Calibrated to  4-20 mA for 0 to 6" H2O DP, linear.    Transmitter works fine.

ITE. PX-750-06Di, calibrated to 4- 20mA for 0 to 6" H2O DP, linear.   Transmitter works fine.

ITE+ITW total, PX-750 -30 SQDI.  It looks like electronic board for square root output is broken. It can not be calibrated  to 4mA @ 0 inch H2O DP. The transmitter is calibrated to 10.25mA - 25.25mA for 0 to30" H2O DP, linear. Transmitter works fine.

 Low active cooling water return, Px-750-30di, smart.  The transmitter is broken. The output current stuck at 44.5mA on all DP.  I tried zero and reset it by following instruction manual, but failed to bring it back. The electronic boards are broken mostly. The production is discontinued by Omega Engineering. A new Omega transmitter PX3005-25WDWBI (linear) will be ordered for its replacement.

2023-06-28: A new Omega transmitter PX3005-25WDWBI (linear) has been installed back to LALCW system in target hall. Transmitter is calibration by manufacturer @ 4-20mA output@0 to 25 in H2O DP. Control group will finish the cable connection in TH, electrical room, and reprogram   on epic page on July -11th.

2023-07-12: Cable connection, formula reprogram, and epic page reboot are done yesterday by Ray.M. New transmitter works fine. All flow rates are displayed on epic page properly with new program formulas.

TCS cooling water system was started and tested this Wednesday. Chiller compressor 2 and 3 was in operation cycle twice without issue. TCS:TK2 was refilled to 28 inches. Water system works fine. system was switched off after test.

ITE TP3,4, 1S,and 4S were started successfully this afternoon. All pump current draws  were below 1.5A . IG1S was switched on. I have no local controller so TP1 and TP2 on TM4 at  MSP can not be checked.  IG1S was hard to switch on at first. It timed out and showed error 09 code. I removed the connector back cap, and it could be switched on after. I will look on this issue. 

Turbo -pumps were stopped  last night at  6 pm. All four pumps worked good during check. For IG1S switching on issue, the problem either caused by over pressure(No TP1, 2 in ITE)   or because coaxial cable was pinched by connector cap and caused bad contact on pin to cable.   I modified the connector cap inside by opening more space for cable passing through the cap. The cap is installed back.   The gauge will be switched on next week again. We keep watch on it

The pail handling tool which is used to move 5 gallon pails around the target hall was inspected by A. Newsome, N. Jorgenson, and E. Lahe. The main tool as well as spare were checked for the following items. The tools are in good, working condition. It is noted that some fasteners on the hook assembly were slightly loose, but have been tightened.

• Inspect structural integrity of long tube - check for bending, warpage, dents, cracks, rust/corrosion
• Inspect structural integrity of hook assembly - check for bending, warpage, dents, cracks, rust/corrosion
• Inspect fasteners - check all fasteners installed as per drawings, fasteners are tight
• Inspect crane interface assembly - check for damage and wear where the tool connects to the crane
• Check alignment - verify the tool connects to the crane and hangs vertically with no major misalignment (this step was not done - alignment is regularly checked during operations, and there was no concern as the tube was straight)

 Note: these tools are being inspected monthly by D. Wang and F. Song.

Argon vented ITE station. ITEVV1S and ITGT SV3 were closed after venting.

SMP  vacuum pumping down is stopped. SMP and TM4 venting to atmosphere will be started soon.

 The emergency close mechanism for the Storage Vault door was tested by Travis Cave, Nadia Jorgenson, Adam Newsome, and Jason Zhang. The door was opened to its fully open limit, then closed with the emergency system. 

The test was successful.

TCS MP1 is replaced due to poor performance( system shows unstable and high reading on TCSCG1A and high TP1,TP2 current draw) . The pump is edward 15i scroll pump. Since vacuum group has no same spare pump, i have to use SMP roughing pump SMP:MP1 which is a  same pump to replace it.. After the replacement ,the TCS:CG1A and TP1, TP2 current draw are back to normal. The original TCSMP1 was surveyed. Swipes on intake and exhaust port are 300 counts and 1000counts. RAM contact field measurement are from 0.2 to 0.5 usv/hr. It is stored in TH. We will try to refurbish this pump first and use as for SMP:MP1. If we can not refurbish it, a new 15i pump will be purchased for SMP:MP1.

2023-05-31: Opened pump tip seal chamber and swiped chamber inside. The contamination level :1200 counts on 44-2.  The tip seal and tip seal chamber o ring need to be replaced . Checked gas ballast knob. The O-ring inside knob is in good condition. Checked exhaust port o-ring. it is in good condition. spare part PO will be issued soon.

2023-06-14:Tip seals and o-ring have been replaced on original TCS:MP1. After, it was tested at TCS for 48 hours. The pump is much quiet on operation, and the pump body temperature is mild. The final  inlet pressure this pump could get with TCS PV1 closed is about 23 mtorr.  The result is good. I installed it back to TCS vacuum station and reinstalled SMP:MP1 back to SMP vacuum station.  

ITW water signal interlock check is done. All ITW water signals including HS, EE, Coil , Ta, Tu, MSP, C-window, HVC1, HVC2, 2A-dump, 2A -shielding plug, 2A-tank, 2A-window, and 2A-collimator are checked. All  water signal interlock work fine.

MAA ASU test have been done following document 154779. All three tests in document are passed. DCR Jas has all test documents.

This test includes the functional test on TH emergency roof hatch which is located at the west end of TH roof. The hatch could be opened and closed properly from TH inside.

The annual inspection of the mini-storage vault and main storage vault was completed June 23, 2023. The following items were checked:

• Cabling and cable management
• Connectors
• Controls box - internal wiring and components, functionality
• Limit switches - functionality, wiring, mounting
• Motor
• Bearings
• Set screws
• Miscellaneous fasteners

The inspection was generally successful. A couple of minor findings were:

• Bearings for both the main and mini storage vaults must be greased. This is planned for a different day as it involves removing the mini vault's door.
• There was a small piece of metal on the track for the mini storage vault which was causing the door to "bump" over it as it passed over. This piece was removed and the door behaved normally.
• The wheel track for the main storage vault was dirty - it was cleaned
• It was suggested that the 120 VAC power cable for the mini storage vault controls box should be connectorized - this will be added to the "to-do list" for the future

Plant group changed TCS water filters last Friday. 4 filters on resin can inet /outlet sides and filters(4 in one cartridge house)on pump return line have been changed. Triumf maintenance tags on filters have been updated. No water leak after job. The TCS TK2 water level dropped  from 20" to 16" because of the job. I will refill the level to 28" today. 

TCS:TK2 is refilled to 28".

ITE water signal interlock check including HS,EE, TA, TU, MSP. Coil1 , C-window ,2a-window, 2A tank, 2A shielding plug , 2A dump, 2A collimator  are done. All things work.

Based on a request from CNL (attached), modifications were made to the wire ropes protruding through the tops of F-308s to add a crimped loop which acts as a lifting feature. Tests were performed (report attached) on 10 sample units to validate the strength of these loops, since each loop could not be tested in-situ once the pails were already packed in F-308s. CNL has reviewed and approved the test report.

Wire ropes within the following F-308s, which were staged for shipping as of June 20, 2023, were modified to include the lifting loop:

1. 06
2. 13
3. 15
4. 16
5. 19
6. 20
7. 21
8. 22

Each lifting loop was:

• Crimped according to the same procedure, using the same parts and tools, as the 10 sample units
• Measured using a tape measure to confirm the 3" size specified by CNL
• Checked using a go/no-go gauge provided from the crimp tool manufacturer
• "Pull tested" by hand as a quick check to confirm the crimps were successful (not a quantitative and official test, but a secondary qualitative "feel good" check)

As of the time of writing this e-log, TRIUMF believes these F-308s to be ready to ship.