Friday, February 28, 2025, 15:54 : installed target assembly in test stand
Friday, February 28, 2025, 15:54 roughing
Friday, February 28, 2025, 17:16 Turbo pumps on
Monday, March 03, 2025, 15:00 Ramping TGHT/TBHT to 580/230A at 1A/30s
Tuesday, March 04, 2025, 13:46 increasing BIAS/EE/EZL to 30/2.5/13 kV
Tuesday, March 04, 2025, 14:00 Optics on. SIS tune confirmed
Tuesday, March 04, 2025, 14:30 Mass scan complete - no end caps - no beam
Tuesday, March 04, 2025, 17:35 Current integrators appear to be down. Investigating further.
Tuesday, March 04, 2025, 17:35 at 30kV, there was sparking once approximately every 5 minutes. over time, the voltage was decreased and at 26kV the spark frequency decreased to one every 20-30 minutes. This sparking appeared to be from BIAS to EZL based on the strip tool data. It was also silent, so likely inside the test stand chamber. Two sparks over the HV time appeared to spike the TGHT current as well, although there was no disruption to TGHT operation
Tuesday, March 04, 2025, 17:38 HV BIAS / EE / EZL ramped down to zero
Tuesday, March 04, 2025, 17:38 ramping down TGHT/TBHT to zero at -1A/30s
Thursday, March 06, 2025, 09:45 Increasing BIAS / EE / EZL to 30/2.5/13kV to see if sparking persists while cold.
Thursday, March 06, 2025, 16:11 no sparks seen, even at 30kV
Thursday, March 06, 2025, 16:14 HV ramped down.
Thursday, March 06, 2025, 16:14 ramping back up TGHT TBHT to 580 230 at 1A/30s to reevaluate sparking
Friday, March 07, 2025, 09:06 ramped up HV/EE/EZL to 20/2.5/13 kV to continue HV conditioning. will be bumping up HV throughout the day depending on spark frequency
Friday, March 07, 2025, 23:30 ramped down HV/EE/EZL to zero, at end of day HV BIAS was at approximately 22kV after a 90 minute period of no sparking.
Saturday, March 08, 2025, 17:08 increasing HV/EE/EZL 20/2.5/13 kV to resume HV conditioning.
Saturday, March 08, 2025, 23:59 At 30kV, no sparks seen for 30 min. Conditioning appears to have been effective. Suspicion is that the sparking is likely due to test stand infrequent use during improvements, etc.
Sunday, March 10, 2025, 00:07 decreasing HV/EE/EZL to zero.
Sunday, March 09, 2025, 00:13 cooling TGHT TBHT to 0A 0A at 1A/30s
Tuesday, March 11, 2025, 11:36 Opened VV1 to atmosphere - Brady |