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Message ID: 1071     Entry time: Fri May 16 08:21:36 2025
 Author: VM, IC, DN  
 Status: Under Process 
 Type: Shift summary 
 Category: Ring Commissioning 
 Important:
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08h20 ThomX was started: Modulator, frig, laser

08h27 Chillers were started, cycling all magnets

10h50 HV is 'ON'

12h38 RF Gun phase is 209 dg. Sect. phase is 207 dg. Charge from the RF gun is -70 pC. Laser Att. 260. 

The strange behavior of the ICT signals does not allow for phase charge scanning.

Laser Att.      Gun Charge pC

260                -70

270               -102

280               -157

290               -255

300              -320

310             -370

320             -400

400             -470

The receipt for MRSV --> for -440 pC Isol=240, adjasted phases (RF Gun 201 dg., Sect. 205 dg.).  RF Cav. at 150 kV, Phase 16 dg., More or less good storage. ri-c1/BPM.03- Lib.03 TbTSum 1.8e8

-58 pC -->ri-c1/BPM.03- Lib.03 TbTSum 4e7

Scaling of the charge, very roughly:

In the injector, the charge measured by BPM after the e- gun 440 pC/58 pC ~7.6

In the ring, the TbTSum @2000turns 1.8e8/4e7 ~4.5

So, the difference is 1.6. This can be explained: beam losses in the ring during the injection, transport efficiency from the gun to the ring

14h40 HV was off. Access to the bunker

14h56 HV is 'ON'

15h12 HV was off. Access to the bunker

15h20 HV is 'ON'

15h17 Series of breakdowns in the RF Gun without interlocking

15h31 HV was off. Access to the bunker

15h42 HV is 'ON', RF Cavity interlock, fixed . There is no image. MRSV camera needs to be checked

16h04 HV was off. Access to the bunker

Problem with the camera was fixed

16h27 HV is 'ON', Charges: -424 pC, -420 pC, -461 pC

16h39 RF Gun phase set to 203 dg. sect. phase 203 dg. HV was off. Access to the bunker

16h50 HV is 'ON'.  Charges: -423 pC, -420 pC, -461 pC, ri-c1/BPM.03- Lib.03 TbTSum 2e8

17h04 HV was off. Access to the bunker

17h13 HV is 'ON'. 

17h24 HV was off. Access to the bunker

17h41 HV is 'ON'. 

17h52 ThomX was stopped

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