 Wednesday, July 12, 2023, 22:21, Carla Babcock, North Hot-Cell, Standard Operation, , TiC#5, TiC#5 post irradiation inspection results
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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 |
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Tuesday, July 25, 2023, 16:25, Carla Babcock, North Hot-Cell, Standard Operation, , SiC#45, SiC#45 post irradiation inspection
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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... |
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Wednesday, August 09, 2023, 13:43, Carla Babcock, North Hot-Cell, Standard Operation, TM2, TiC#6, TiC#6 PIE
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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. |
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Wednesday, November 29, 2023, 12:45, Carla Babcock, ITE, Standard Operation, , , gas lines pumped down
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Pumped down the gas lines in ITE on Tuesday Nov. 28 2023 and opened the CF4 bottle valves. Missed the small section between the regulator and SV2 though,
so will probably redo it.
Pumped down again on Dec. 12 2023. Was taking a long time so might not be as good as earlier. Maybe there is a leak in there... |
Tuesday, January 02, 2024, 16:01, Carla Babcock, Conditioning Station, Development, TM3, , TM3 service tray HV testing and conditioning 
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Tuesday, January 02, 2024, 15:58 :
Started HV ramp up on TM3 service tray about 3pm today. Had to bypass TCS:BIAS interlocks to make it work - there are some flow restrictions on
the water lines that are causing the flow interlock to periodically trigger. The water flow it not very important for this test as long as the water is |
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Wednesday, January 10, 2024, 16:51, Carla Babcock, ITE, Standard Operation, TM4, UCx#43, UCx#43 failure
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To deliver stable beam to RadMol, started heating UCx#43 up again. Target was overheated during initial conditioning in Nov but then ran well for
4 weeks. During the run time, the TGHT voltage jumped around and this was reflected in the ion current, but yields seemed unaffected.
When re-heating it, the TGHT voltage was very unstable and once it got to 440A, it went into voltage limiting mode. We ramped down and it was still |
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Wednesday, January 17, 2024, 20:09, Carla Babcock, South Hot-Cell, Standard Operation, , Ta#66, Ta#66 post irradiation inspection
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On Jan. 9 we did the PIE on Ta#66. Opened the heat shield and removed the EE. The inside of the heat shield was very black with lots of flakes falling
off. The target itself looked overheated, and the container looked pretty bad for a Ta target. The outside of the EE looked perfect but after removing
it there was a lot of black stuff on the side and we saw that the Re foil was curled up. Jens said during the runtime that he saw something that looked |
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Friday, January 26, 2024, 16:48, Carla Babcock, South Hot-Cell, Standard Operation, TM4, UC43, UCx#43 PIE
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UCx#43 PIE was done in the SHC. As expected based on electrical measurements, the target container was broken on the right side and came off easily.
Despite all the black stuff seen on the containment box and source tray, the inside of the heat shield was very clean. Checked if the Re foil was curled
in and didn't see anything. Looked fine other than the broken container. |
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Monday, February 12, 2024, 18:44, Carla Babcock, ITW, Maintenance, , , ITW annual HV testing
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ITW was set up for HV testing - water is running and at a high resistivity due to injected N. Einzel lens is attached to ground. Everything else is as
normal. The module plug is in so no vacuum bypasses were needed. Very easy to ramp to 60kV. Sat at 60 for about 1.5hrs with maybe 1 spark (hard to say
from the strip tool data). Current draw was about 176uA. Data dumped as isac/data/ITW_HVtesting_shutdown2024 |
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Thursday, February 15, 2024, 17:40, Carla Babcock, ITE, Standard Operation, , , ITE annual HV testing
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ITE was set up for HV tests - this time the module plug was not in so the BIAS and EE had to be bypassed. NOTE: ITE:BIASPLC must also be bypassed for
this to work. Currently it is located on the vacuum bypasses page, but may be changed to the optics page soon.
ITE was ramped to 60kV in steps of 1kV easily. It sat at 60 for about 1.5 hours with a current draw around 173uA. It was not entirely stable though, |
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Tuesday, April 23, 2024, 17:34, Carla Babcock, South Hot-Cell, Repair, TM3, , TM3 wire pulling
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Wires were pulled in TM3 and service cap was closed up again:
Einzel lens wire (30kV kapton), routed in the pumping duct and attached with #10 ring tongue to EZL feedthrough in service cap
4 steerer wires, routed in th pumping duct and attached with push on connectors to the 4 SHV feedthroughs on the module side panel. Coax grounding |
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Thursday, May 02, 2024, 18:48, Carla Babcock, ITW, Standard Operation, , , ITW cage setup
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ITW gas lines pumped down to 2e-3Torr on leak detector with leak rate in the low e-7 atm-cc/s. Gas bottles opened at 3psi and labels in epics changed
to reflect correct setup. switch box set to cathode mode, checked that anode wire was at HV common.
note ballast is removed from ITW now to be used in ITE so that line is blanked off. |
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Tuesday, May 14, 2024, 15:27, Carla Babcock, ITE, Development, TM3, UCx#44, TM3 conditioning and testing in ITE
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Tuesday, May 14, 2024, 10:26 :
Ramping up bias/EE/EL on ITE - will see if the HV cage in the pit can hold 60kV or not.
At around 50kV the bias read current starts to get jumpy. Doesn't look like its an issue for the voltage, but definitely instability increases. |
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Tuesday, June 04, 2024, 11:44, Carla Babcock, South Hot-Cell, Development, , empty LP FEBIAD, investigation of cathode short on empty LP FEBIAD
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On May 30 Aaron, Chad and I removed the empty LP FEBIAD target from the SHC into the anteroom to attempt to find out the source of the cathode short
observed online. The behaviour online was that a connection of several hundred ohms was preventing the cathode from being biased. The resistance was still
enough to allow us to run in anode mode, which is what we did. I am not sure where the cathode short came from but there was significant sparking on this |
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Friday, June 14, 2024, 16:04, Carla Babcock, ITW, Repair, TM4, UC#45, Replaced and reinstalled electronics in ITW cage
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ITW has been behaving badly at higher voltages recently, even without protons on. I conditioned it up to 50kV with heaters off in the TCS and it was
fine. But when I tried to do the same with heaters on in the station, it was quite sparky and it kept tripping the TGHT/TBHT. I went to 49kV where it was
unstable, then lowered to 48kV where it looked fine for 30mins. But even operating at 40kV, it tripped the heaters several times. The TBHT voltage came |
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Monday, June 17, 2024, 17:24, Carla Babcock, ITE, Development, TM3, UCx#44, Status of gas system prototype in ITE
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A new gas system for FEBIAD operation was installed in ITE to enable us to use a calibrated leak which is attached to the target heat shield. This will
allow us to control the quantity and purity of the gas going into the system, and to switch quickly between gasese and pressures.
The schematic of the system is attached. The use of the ballast container is likely not needed - it was originally included in case we want to |
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Monday, June 24, 2024, 14:37, Carla Babcock, South Hot-Cell, Development, TM3, UCx#44, Inspection of TM3 and UCx#44 after no-protons run
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TM3 and UCx#44 ran in ITE but issues with the cyclotron prevented proton beam delivery. Nonetheless, the target was heated and provided stable beam to
TITAN as well as for tuning and some tests.
Results of inspection of TM3 module after run: |
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Thursday, July 04, 2024, 01:20, Carla Babcock, ITE, Development, TM3, SiC#46, TM3 conditioning with protons
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Initial Summary:
TM3 sparking behaviour in ITE has been very disruptive both with and without protons. Protons are at 60uA, target heater at 540A. Max voltage achieved
so far is 51kV, limited by time and a current limit on the BIAS supply. |
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Tuesday, July 09, 2024, 16:14, Carla Babcock, ITE, Repair, , , Attempts to reduce ITE:EL trips from HV sparks 8x
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ITE:EL has been tripping off due to HV sparks. Usually this also trips ITE:Q1/2. These are sitting in side-by-side racks.
The working theory is that HV sparks are returning to ground through the EL and quads, tripping them off. Possibly this is the result of a changed
low impedance ground path. How this change happened could be either something we did during shutdown or the changes we made in TM3, no clear evidence yet. |
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Sunday, August 11, 2024, 11:25, Carla Babcock, South Hot-Cell, Repair, TM3, TiC#8, short on multipin wires to TBHT discovered
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With the new TiC#8 target installed on TM3, there was a ~7kOhm connection between TGHT/TBHT (A/B/C/D) and HV common. The standard electrical check on
the module showed standard values, so it was assumed the problem was inside the target.
Started removing bolts/water connections one by one to see if any of them had an effect on the measurement. Found that disconnecting the multipin |
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