Monday, July 09, 2018, 10:43: Rouging.
Monday, July 09, 2018, 13:14: Turbo pumps on.
Tuesday, July 10, 2018, 07:45: Waterlines opened. Vacuum ok @ 6.93e-07T. No response on RGA.
Tuesday, July 10, 2018, 08:05: Opened gas lines TSH:SV3 & TSH:SV4. Vacuum spiked to 1.08e-06T. Response registered on RGA. Closed valves.
Tuesday, July 10, 2018, 08:22: Vacuum Holding at 1.08e-06T.
Tuesday, July 10, 2018, 08:24: Close valve to small gas line pump. Pump is running.
Tuesday, July 10, 2018, 09:02: Path to TSH:SV1 through SV2 & SV5 ok. Vacuum @ 5.55e-07T. Close and begin SV3 & SV4 purging.
Tuesday, July 10, 2018, 09:12: All gas lines opened.
Tuesday, July 10, 2018, 09:16: Power/sources on. Vacuum @ 7.26e-07T.
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
24.4 |
3.85 |
| TBHT |
24.2 |
2.99 |
| COIL + EE |
24.2 |
4.97 |
| TGHT |
24.6 |
5.61 |
Tuesday, July 10, 2018, 09:18: Auto ramping TGHT / TBHT to 580 / 270 A @ 2A per min.
Tuesday, July 10, 2018, 09:20: IV4 opened. Optics on (already set).
Tuesday, July 10, 2018, 14:11: Abort auto-ramping. Increase TBHT ramping to 300A. Continue auto ramping TGHT / TBHT to 580 / 270 A @ 2A per min.
Tuesday, July 10, 2018, 13:56: BIAS/EZL/EE @ 30/13/1.5 kV. Anode set to 200 V
Tuesday, July 10, 2018, 14:12: Auto ramping complete.
| Device |
Temp
[C] |
Flow
[lpm] |
| HS + MSP |
34.6 |
3.85 |
| TBHT |
25.0 |
2.97 |
| COIL + EE |
24.9 |
5.00 |
| TGHT |
26.8 |
5.60 |
Tuesday, July 10, 2018, 14:17: TBHT set to 300 A. Read back reads 312 A
Wednesday, July 11, 2018, 06:52: Coil to 10A.
Wednesday, July 11, 2018, 07:00: Coil to 20A.
Wednesday, July 11, 2018, 07:05: Coil to 30A.
Wednesday, July 11, 2018, 07:10: Coil to 40A.
Wednesday, July 11, 2018, 07:20: Coil to 50A.
Fernando Maldonado
Wednesday, July 11, 2018, 09:59 Anode current=4.884 mA, Anode Voltage=200V. FC0=1.59e-9 . Source seems to be too cold. ramping up TBHT to 320 A (for a 330A readback). Vaccum=9.06e-7
Wednesday, July 11, 2018, 10:18 Ramp up compleete TBHT=320A Read Back=33.8A. Anode current=9.768mA. Anode voltage=200V. FC0=1.77e-8A. Vaccum=9.13e-7
Wednesday, July 11, 2018, 11:52 Mass scan performed for nominal values
Lunch
Steering
Adjusting Emittance parameter for more precise scan
Wednesday, July 11, 2018, 15:37 Cathode is still "cold" , at 325A and 250V the anode current is 15 mA. The way to obtained more current and to have better emittances readings is to increase the tbht current
Wednesday, July 11, 2018, 15:39 TBHT=325, TBHT RB =339.1A, TBHT PS=330A. Increasing TBHT to 335A. Where TBHT RB is the read back value. TBHT PS is the value display on the Power Supply
Wednesday, July 11, 2018, 15:46 tbht=335, tbht rb=349.7, tbht ps=341. With this the anode current is 24.42 at anode voltage=250V. *THIS WILL BE THE MAXIMUM VALUE"
Wednesday, July 11, 2018, 17:15 Mass Scan measurement seem to not vary with anode voltage
Wednesday, July 11, 2018, 17:45 Coil to 60 A to let out gass a bit more overnight. Vacuum ok at 9.6e-7
Thursday, July 12, 2018, 07:25: Power outage. (07/11/2018 @ 21:53 approx) The test stand was completely knocked out. Power & pumps were all shut down.
Thursday, July 12, 2018, 07:31: Power supplies turned off and all settings manually re-zeroed. |