Thursday, March 14, 2024, 15:39: Roughing

Thursday, March 14, 2024, 16:20:TP1B on

Thursday, March 14, 2024, 16:40: TP1A on

Thursday, March 14, 2024, 16:51: IG1 on

Thursday, March 14, 2024, 17:28: Waterline FS#5 open

 Friday, March 15, 2024, 13:19:  Gradually increased BIAS to 25kV, then up to 50kV more slowly. Accompanied by increase in EZL voltage.

Friday, March 15, 2024, 13:50: Periodically increased BIAS voltage in 100V increments watching for sparks. Decrease BIAS whenever sparks. settled at 51.5 kV (cannot increase further without sparking), left at high voltage.

Friday, March 15, 2024, 15:48: Decreasing BIAS to 10kV 

Friday, March 15, 2024, 16:28: ran coil at 80A until vacuum recovered. 

Friday, March 15, 2024, 19:29: decrease coil to 0A, decrease BIAS to 0V

Monday, March 18, 2024, 10:08 increasing TGHT/TBHT to 440A/290A at 1A/30s

Monday, March 18, 2024, 16:00  increasing COIL to 40A, waiting for vacuum to return to normal 

Monday, March 18, 2024, 21:05:  decreasing COIL to 0A

Tuesday, March 19, 2024, 09:35: increased COIL to 40A.

Tuesday, March 19, 2024, 10:17: increased TDH:ANODE (cathode mode) to (-)200V

 Tuesday, March 19, 2024, 10:20: increasing BIAS to 30kV

Tuesday, March 19, 2024, 13:12:  turned on gas. vacuum jumped up and tripped everything off.  gas was immediately turned back off. TGHT and TBHT were off for approximately 1 minute before being turned back on.

Tuesday, March 19, 2024, 13:46:   cooling. need to investigate possible leaks. 

Tuesday, March 19, 2024, 15:58: TGHT and TBHT at 0A. Turbo pumps turned off. waiting to slow before venting.

 Tuesday, March 19, 2024, 16:20 venting

Wednesday, March 20, 2024, 14:47: Target assembly was removed today and the tube from the inlet to the calibrated leak was replaced. Now reinstalled, roughing. Gas was turned on at ~0.2 bar during roughing. No effect on vacuum.

           water cooling also turned on.

Wednesday, March 20, 2024, 14:53 Turbo pumps turned on.

Wednesday, March 20, 2024, 20:24: begin ramping TGHT TBHT to 440/290A at 1A/30s

Thursday, March 21, 2024, 09:54:    Target heated, vacuum good.   Tested gas to ensure there is no noticeable effect on vacuum. Lines subsequently vented through the line roughing pump.

Thursday, March 21, 2024, 09:55    Optics switched on. increasing cathode to 200V and coil to 40A. Watching vacuum, checking beam tune 

Thursday, March 21, 2024, 10:20   ramping BIAS to 30kV 

 Thursday, March 21, 2024, 11:14 : scanned, data recorded

Thursday, March 21, 2024, 11:14  cathode reduced to 100V. scanned 

Thursday, March 21, 2024, 11:32:  coil reduced to 20A. scanned. 

Thursday, March 21, 2024, 11:50  cathode increased to 200V. scanned 

Thursday, March 21, 2024, 12:07 coil increased to 40A.  Argon gas on (-0.8bar at regulator). scanned 

Thursday, March 21, 2024, 12:31  reducing bias to 0kV 

Thursday, March 21, 2024, 13:02 argon regulator pressure increased to -.64bar

Thursday, March 21, 2024, 13:05 increasing bias to 30kV

Thursday, March 21, 2024, 13:15:  vented lines, scanning

 Thursday, March 21, 2024, 13:35 gas on. scanning

 Thursday, March 21, 2024, 15:05 cathode at 100V, scanning

Thursday, March 21, 2024, 15:20 coil at 20A, scanning

 Thursday, March 21, 2024, 15:55 coil off. scanning

Thursday, March 21, 2024, 16:10 cathode off, scanning

 Thursday, March 21, 2024, 17:23  - bias down. changing gas pressure

Friday, March 22, 2024, 09:08   increasing bias, checking tune,  increasing cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 09:48  gas vented, scanned, gas on, scanned.

Friday, March 22, 2024, 09:48  decreasing bias to 0V, changing gas pressure.

Friday, March 22, 2024, 10:12 pressure at 1bar.abs.  increased bias to 30kV, checked beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 10:13   gas on. scanning 

Friday, March 22, 2024, 10:33   decrease bias, changing pressure. 

Friday, March 22, 2024, 10:57 gas line pressure at 1.5bar.a.   increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 11:42 decreased bias, changing pressure.

Friday, March 22, 2024, 11:52 gas line pressure at ~2bar.a  increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 15:40  bias down to 0V. reducing TGHT TBHT to 0/0

 Monday, March 25, 2024, 09:30 Turbo pumps turned off

 Monday, March 25, 2024, 10:00 venting chamber, purged water lines.

 Monday, March 25, 2024,11:00 removed target assembly

 Monday, March 25, 2024,13:00 replaced target assembly, began roughing

 Monday, March 25, 2024,13:50: turned on water cooling. Vacuum stable. Turned on turbo pumps.

 Monday, March 25, 2024, 15:16   turned on optics elements, cathode to 200V, coil to 80A, EZL to 13kV. monitoring vacuum. Gas leak test shows no effect on vacuum (5e-6T).

Monday, March 25, 2024, 15:22: Ramping TGHT TBHT to 440/290A at 1A/30s

 Tuesday, March 26, 2024, 10:32 Ran mass scans with gas off and on. 

Tuesday, March 26, 2024, 10:32 scanning parameter space for optimal beam output - cathode voltage and coil current.

 Tuesday, March 26, 2024, 15:29 ramping TBHT to 300A, scanning

 Tuesday, March 26, 2024, 16:10 ramping TBHT to 310A, scanning

 Tuesday, March 26, 2024, 16:40 ramping TBHT to 320A, scanning

 Wednesday, March 27, 2024, 09:25 - ramping bias to 30kV

Wednesday, March 27, 2024, 09:40 scanning cathode / coil parameter space to optimize output --- highest output at 200V 60A - 200V 62A - magnet drifted and is not right at Ar peak. corrected. scan repeated

Wednesday, March 27, 2024, 10:31 scanning cathode / coil parameter space to optimize output 

Wednesday, March 27, 2024, 11:02   mass scan with 200V 62A cathode coil.

Wednesday, March 27, 2024, 11:17 - lines evacuated. mass scan.

 Wednesday, March 27, 2024, 11:40 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 11:50 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:10 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:21 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:31 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:43 Ramping bias to 30kV. 

Wednesday, March 27, 2024, 15:00 bias to 0V. changing pressure to .5 bar.

Wednesday, March 27, 2024, 15:13 bias at 30kV.  

Wednesday, March 27, 2024, 15:13 increasing TGHT to 468A (~2250W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 15:39 increasing TGHT to 490A (~2500W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 16:23 reduced cathode voltage to 50V to record the electron current (17.09mA). mass scan taken with coil at 35A

Wednesday, March 27, 2024, 16:35 ramping down BIAS to 0V.

 Wednesday, March 27, 2024, 16:38  decreasing TGHT TBHT to 0A 0A at 1A/30s in preparation to switch to anode mode in the morning.

 Thursday, March 28, 2024, 13:59 - Switched to anode mode

Thursday, March 28, 2024, 13:59 - ramping TGHT and TBHT to 100A at 1A/30s

Thursday, March 28, 2024, 14:37 increasing BIAS to 30kV 

 Thursday, March 28, 2024, 14:47 - ramping TGHT/TBHT to 440A/290A at 1A/7s

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 16:29     ramping TGHT/TBHT to 490A/320A at 1.4A/10s

Thursday, March 28, 2024, 16:36     mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 16:56     mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 17:13      dropping bias to 0

Thursday, March 28, 2024, 17:14      cooling tght and tbht at 1A/30s