Friday, April 19, 2024, 11:32:   assembly installed in test stand.  VV1 closed, pumping down

Friday, April 19, 2024, 11:56:   TP1A and TP1B on. 

Friday, April 19, 2024, 12:34:   water cooling on. no effect on vacuum.

Friday, April 19, 2024, 12:34:  Argon gas set to 0.5 bar. No effect on vacuum.

Monday, April 22, 2024, 09:24  beginning TGHT TBHT ramp to 440A/290A at 1A/30s.    COIL increased to 80A for conditioning. vacuum monitored.

Monday, April 22, 2024, 09:47:   vacuum peaks at ~8e-7 T.

Monday, April 22, 2024, 10:49  vacuum recovered and stable at  4.2e-7 T. 

Monday, April 22, 2024, 10:49  TGHT TBHT ramp rate toward 440/290 increased to 1.4A/10s.  COIL increased to 90A for conditioning. vacuum continues to be closely monitored.

 Monday, April 22, 2024, 11:39  TGHT TBHT have reached 440/290.  Waiting for vacuum to drop to stable value. Currently at 1.12e-6 T.

 Monday, April 22, 2024, 13:10:    vacuum stable at 9.9e-7 T

Monday, April 22, 2024, 13:11   increasing bias to 30kV 

Monday, April 22, 2024, 14:30   Unintentionally, TBHT had been increased to 230 instead of 290. Increasing to 290. 

Monday, April 22, 2024, 14:40.  BIAS sparking. Decreasing bias and increasing COIL back to 90A to condition. (spark frequency approximately 1/min)

 Monday, April 22, 2024, 15:12   increasing TGHT TBHT to 490/320 for conditioning   -  monitoring vacuum and bias closely

Monday, April 22, 2024, 15:23   prior to vacuum recovering, bias sparked again. decreasing to 25kV while vacuum recovers. 

 Monday, April 22, 2024, 15:37 vacuum plateaued at 2.5e-6T

 Monday, April 22, 2024, 16:50 Vacuum significantly decreased to ~1.5e-6.  increased bias to 30kV to observe argon beam activity. looks normal. data to be collected tomorrow after vacuum down further. Sparks were still observed at 30kV although significantly less frequently. (1/5min)

 Monday, April 22, 2024, 16:52    decreasing bias to 0 V

 Tuesday, April 23, 2024, 09:24  Vacuum at 9.6e7 T.  decreasing COIL to 0, increasing bias to 30 kV

Tuesday, April 23, 2024, 09:51   BIAS at 30kV, no sparks seen. 

 Tuesday, April 23, 2024, 09:58.  Argon gas on. COIL at 40A, ANODE at 200V. Using short mass scan to find Ar-40 peak. 

Tuesday, April 23, 2024, 10:33:   ran degaussing script in anode mode - measure_id=6018

Tuesday, April 23, 2024, 10:36  COIL set to 80A, ANODE at 340V, BIAS at 29 660 V.  

Tuesday, April 23, 2024, 10:37 mass scan 

 Tuesday, April 23, 2024, 10:57 closed sv4, open sv1. to pump down argon gas lines. then closed sv5 and sv1. 

Tuesday, April 23, 2024, 10:57   mass scan

 Tuesday, April 23, 2024, 11:19   TGHT TBHT decreased to 440 290

Tuesday, April 23, 2024, 11:35  mass scan

Tuesday, April 23, 2024, 11:49    turned argon gas back on

Tuesday, April 23, 2024, 11:50    mass scan 

Tuesday, April 23, 2024, 12:13     decreasing bias to 0 V

Tuesday, April 23, 2024, 12:33   decreasing TGHT TBHT to 100A at 1.4A/10s 

 Tuesday, April 23, 2024, 13:29   decreasing TGHT TBHT to 0A at 1A/30s

 Tuesday, April 23, 2024, 14:13   increasing bias to test HV

Tuesday, April 23, 2024, 15:00   when bias was at ~50kV, epics shut down at the test stand computer. Internet disconnected. there were two sparks over ~10min at 50kV, but there was no spark at the same time as the epics shut down

Tuesday, April 23, 2024, 15:05  It appears that this also actuated BV1B and BV6, then turning off TP1B and TP6 turbo pumps.

Tuesday, April 23, 2024, 15:16:  continuing to increase HV remotely, while monitoring closely for any sparks. the HV appears to be stable. 

Tuesday, April 23, 2024, 15:20  at 54.6 kV, the bias current rapidly increased from 0.02mA to 0.135mA. There was no decrease in voltage and no accompanying spark. HV was decreased until current dropped, before increasing HV again.

Tuesday, April 23, 2024, 16:01  decreased bias to 0V. 

Tuesday, April 23, 2024, 16:01   Turbo pumps restarted. 

 Wednesday, April 24, 2024, 09:25    TP1B and TP1A off. winding down to begin venting

 Wednesday, April 24, 2024, 10:47    VV1 open. venting.