Thursday, February 18, 2021, 15:19: Gas lines roughed and refilled. Gauge reads -50 kPa. Absolute pressure is 50 kPa.
IG1 @ 9.7 e-7 T.
Thursday, February 18, 2021, 15:27: BIAS/EZL/EE @ 30/13/1.5 kV. No sign of instabilities as before. Bias current=0.08 mA.
This also means the leak, in this clean environment is fine.
Thursday, February 18, 2021, 15:28
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
22.25 |
3.71 |
| TBHT |
22.11 |
6.16
|
| COIL + EE |
21.94 |
1.71 |
| TGHT |
22.06 |
5.02 |
Slightly drop in flow. Will check later as well.
Thursday, February 18, 2021, 15:37: BIAS/EZL/EE @ 35/13/1.5 kV.
Thursday, February 18, 2021, 15:39. Spark inside. Recover with no problem
Thursday, February 18, 2021, 16:27 : BIAS/EZL/EE @ 40/13/1.5 kV.
Thursday, February 18, 2021, 16:28: Spark
Thursday, February 18, 2021, 16:42:
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
22.16 |
3.66 |
| TBHT |
21.91 |
2.42
|
| COIL + EE |
21.91 |
1.66 |
| TGHT |
21.8 |
4.91 |
Thursday, February 18, 2021, 17:1: Logging water temperature and flow in the PC.
Thursday, February 18, 2021, 17:19: BIAS/EZL/EE @ 0.000 kV.
Thursday, February 18, 2021, 17:20: Auto-ramping TGHT/TBHT to
Thursday, February 18, 2021, 17:26: Anode is shorted. It seems that the Ta capillary is touching the HS. I have to open.
Thursday, February 18, 2021, 17:35: IG1 and turbos off.
Thursday, February 18, 2021, 18:2: Venting
Thursday, February 18, 2021, 18:42: Gauge reader at the service cap is now at -40 kPa. A 10 kPa incursion over 4 hours.
Friday, February 19, 2021, 11:04: The anode still has a short, returning all previous jumpers. Short present.
Unhooked anode cable can sustain voltage, hence the electric circuit has a short,
Friday, February 19, 2021, 11:48: Target removed. No short on anode-target. However there is no short in the service tray either, the voltage from the anode supply is held with no problem.
Friday, February 19, 2021, 12:41: Only when the tbht is bolted the power supply goes current limited.
Friday, February 19, 2021, 12:44: Source tray can hold anode voltage without drawing any current, as expected.
Friday, February 19, 2021, 12:52: Target legs to HS presents a short. When HS is removed the short is gone. Will try to find the contact point.
Friday, February 19, 2021, 12:56: Suspecting that is the gas line that goes to the back of the TGHT; is too high and touches the HS. Putting and insulator and installing the HS cover. No short.
Removing the insulator there is a short.
Will bend the gas line.
Friday, February 19, 2021, 13:08: Installed the open assembly, and the anode voltage is held in the system without drawing current, as expected.
Friday, February 19, 2021, 13:21: TIS assy re-installed, short is fixed. |