09h00 Warm-up ThomX: Modulator, Laser, Fridge

09h05 Chillers were started, cycling all magnets

10h03 HV is on

10h08 The laser att. 300 ==> 274 to set the gun charge to -100 pC 

09h00 Warm-up ThomX: Modulator, Laser, Fridge

09h05 Chillers were started, cycling all magnets

10h03 HV is on

10h08 The laser att. 300 ==> 274 to set the gun charge to -100 pC 

10h53 beam is in the ring. Laser phase 101 dg., Sect.  Att. 2.533 dB, sect. phase 223 dg. (mot. pos. 1710. 223-60 dg. mot. pos. 1254 )

11h34 Breakdowns in the gun. Low SF6 pressure (2.2 bar)

13h38 Jean-Noel fixed it

13h48 HV is on

14h41 Gun charge is very ubstable and low. Breakdowns in the gun.

15h06 RF gun att. 3 dB

15h10 RF gun att. 2 dB

15h13 RF gun att. 1.5 dB

15h16 RF gun att. 1 dB. Can't move on. 

15h19 Shutter was closed

15h24 RF gun att. 0.8 dB

15h28 RF gun att. 0.4 dB

15h29 RF gun att. 0.2 dB, breakdowns, go back to 2 dB

15h51 50 pps 2 dB

16h02 It gets worse 

16h03 12.5 pps.

16h25 RF gun att. 0.5 dB

17h00 RF gun att. 0.8 dB

17h53 RF gun att. 0.0 dB, pulse width 2 us, breakdowns

17h58 RF gun att. 0.0 dB, pulse width 2.7 us, dark current 30 mV, solenoid off

18h00 RF gun att. 0.0 dB, pulse width 3 us, dark current 30 mV (it used to be around 18)

18h17 The laser spot on the cathode, the solenoid on, charge is low. There are breakdows at the new spot position.

18h20 ThomX was stopped

08h32 Warm-up ThomX: Modulator, Laser, Fridge

08h37 Chillers were started, cycling all magnets

09h48 HV is ON

10h42 There was a problem with "Camera Laser". Restarted  li/op/las.02 server by killing it

12h26 Beam is in the ring, RF 100 kV, phase -42 dg. Laser phase 163 dg. Sect att. 2.57 dB, Sect. phase 221 dg. Laser att. 324, Charge oscillating around -120 pC. Feedback laser PID coefficients were changed: P=0.5,I=0.02, D=0.05 to get more stable laser spot position (Old: P=0.7,I=0.01, D=0.1 ).

18h27 ThomX was stopped

7h37 : mise en chauffe en remote (frigo/chiller, modulateur, laser, cyclage)

08h57 HV is ON

==> 70 MeV, F=500.031645 MHz

11h20 Beam is in the ring. recipe_recipe_LI_TL_RI_all_20260320_12_35_26.txt loaded with linac steerers adjusted

11h21 Laser Phase 54.3291 dg., Sect. Phase 256 dg., Sect. Att. 0.197 dB, I_Gun -96.9629 pC, I_Linac -144.3734 pC, I_TL -126.6061 pC RF_Ampl. 99.1184 kV, RF_Phase -59 dg.

7h50 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)

08h58 HV is ON

recipe_recipe_LI_TL_RI_all_20260326_09_09_20.txt loaded

09h20 Laser Phase 83.1 dg., Sect. Phase 212 dg., Sect. Att. 2.397 dB, I_Gun -81.8326 pC, I_Linac -86.4815 pC, I_TL -93.017 pC RF_Ampl. 0 kV, RF_Phase -47.91 dg.

15h29 Laser Phase 97 dg., Sect. Phase 224 dg., Sect. Att. 2.417 dB, I_Gun -100.8297 pC, I_Linac -125.7466 pC, I_TL -113.6521 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.

18h23 Laser Phase 97 dg., Sect. Phase 224 dg., Sect. Att. 2.507 dB, I_Gun -103.7883 pC, I_Linac -128.9273 pC, I_TL -117.0162 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.

8h10 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)

09h12 HV is ON

recipe_recipe_TL_all_20260408_17_18_54.txt loaded
10h25 Energy = 50 MeV, Laser Phase 76 dg., Sect. Phase 224 dg., Sect. Att. 2.52 dB, I_Gun -95.9713 pC, I_Linac -118.9236 pC, I_TL -16.394 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg.

datetime(datestr(TimeNum(1),'yyyy-mm-dd_HH:MM:SS.FFF'),'InputFormat','yyyy-mm-dd_HH:MM:ss.SSS','Format','yyyy-mm-dd_HH:MM:ss.SSS')

7h40 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)

08h43 HV is ON

recipe_recipe_LI_TL_RI_all_20260409_17_07_05.txt loaded

09h00 Energy = 50 MeV, Laser Phase 63 dg., Sect. Phase 217 dg., Sect. Att. 2.49 dB, I_Gun -86.2367 pC, I_Linac -110.0622 pC, I_TL -100.1516 pC RF_Ampl. 48.9051 kV, RF_Phase -35 dg.

09h25 standby, adding SF6 pressure

09h33 HV

10h43 Energy = 50 MeV, Laser Phase 116 dg., Sect. Phase 233 dg., Sect. Att. 2.45 dB, I_Gun -90.9374 pC, I_Linac -114.4855 pC, I_TL -104.2454 pC RF_Ampl. 148.7161 kV, RF_Phase -32 dg.

17h01 Energy = 50 MeV, Laser Phase 97 dg., Sect. Phase 240 dg., Sect. Att. 2.406 dB, I_Gun -100.3151 pC, I_Linac -127.6278 pC, I_TL -114.2449 pC RF_Ampl. 148.7161 kV, RF_Phase -41 dg.
 

10h30 : mise en chauffe  (frigo/chillers, modulateur, laser, cyclage)

All rondes are broken, THOMX key is turned. What is the reason of this intervention?,  There is nobody around. Jean-Noel came and helped to solve the problems.

Help is needed to set up everythiing (rondes sous-sol, PSS....) and tune the photocathode laser.

Dalkia solved the problem with vooling circuit in the morning

10h15 mise en chauffe  (frigo/chillers, modulateur, laser, cyclage)

11h16 HV is ON

11h57 Energy = 50 MeV, Laser Phase 54 dg., Sect. Phase 215 dg., Sect. Att. 2.34 dB, I_Gun -90.3427 pC, I_Linac -115.8595 pC, I_TL -104.0088 pC RF_Ampl. 148.7161 kV, RF_Phase -45 dg.
15h01 Energy = 50 MeV, Laser Phase 35 dg., Sect. Phase 218 dg., Sect. Att. 2.456 dB, I_Gun -101.8359 pC, I_Linac -120.7055 pC, I_TL -114.6878 pC RF_Ampl. 148.7161 kV, RF_Phase -49.5 dg.
18h04 Energy = 50 MeV, Laser Phase 27 dg., Sect. Phase 216 dg., Sect. Att. 2.421 dB, I_Gun -98.616 pC, I_Linac -120.8228 pC, I_TL -14.2993 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg.
20h13 Energy = 50 MeV, Laser Phase 28 dg., Sect. Phase 216 dg., Sect. Att. 2.481 dB, I_Gun -110.7257 pC, I_Linac -129.583 pC, I_TL -123.6972 pC RF_Ampl. 148.7161 kV, RF_Phase -33.5 dg.
 

9h00 : mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

10h02 Start-up modulator, laser, fridge, chillers

The SF6 pressure is low. Magnet power supplies filed to start.

11h17 Stop ThomX