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

7h45: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

8h46 The photocathode laser image on the camera is very weak, I can't initiate feedback. Help needed.

08h56 HV is on

During another attempt to launch laser position feedback, the diaphragm completely disappeared outside the screen (to the right).

OK it was fixed

09h57 beam is in the ring w/o RF, recipe_recipe_LI_TL_RI_good_20260318_16_17_14.txt loaded. Laser phase 5 dg. (to low), sect. att. 0.148 dB, sect. phase 258 dg., Charges around -100 pC,

10h06 RF 100 kV, phase -45 dg.

10h30 interlocks even at sect. att. 0244 dB

11h15 Sect. temp. set to 29.2C  (Clarinette, Consigne 28.6 C)

11h57 laser phase jumped to 18 dg.

12h25 For the 70 MeV settings (DP current 255.8 A) the linac energy is too low, so we left 253.8 A ==> 69.7 MeV.

18h10 ThomX was stopped

7h20: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

08h55 HV is ON

10h07 70 MeV. Beam is in the ring with RF 100 kV, phase -37.5 dg. The recipe_recipe_LI_TL_RI_good_20260318_16_17_14.txt loaded, linac steerers adjusted, Laser phase 56 dg., Sect. Att. 0.191 dB, Sect. phase 255 dg. charges around -100 pC, laser att. 323,

Goal: same orbit as for 50 MeV for X rays.

Work on 70 MeV orbit.

Orbits were obtained near IP. Receipt 70 MeV: recipe_recipe_LI_TL_RI_all_20260320_12_35_26.txt

Work on 61.5 MeV

Receipt 61.5 MeV: recipe_recipe_LI_TL_RI_all_20260320_16_26_35.txt, F=500.034945 MHz

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.

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

9h30 HV is ON

recipe_recipe_LI_TL_RI_all_20260402_14_37_41.txt loaded

Adjustments for bunch length measurements at the linac exit.

11h40 Laser Phase 75 dg., Sect. Phase 225 dg., Sect. Att. 2.46 dB, I_Gun -105.0196 pC, I_Linac -109.9004 pC, I_TL -11.3 pC RF_Ampl. 0 kV, RF_Phase -35 dg.

14h27 Laser Phase 69 dg., Sect. Phase 225 dg., Sect. Att. 2.559 dB, I_Gun -112.9786 pC, I_Linac -138.8843 pC, I_TL -127.2119 pC RF_Ampl. 98.0026 kV, RF_Phase -35 dg.

from RTM 3004 100ms/div. Channel 4 - ring beam charge: timestamp: 2026-04-03_14:31:33.541 MeanCH4 = 9.711800E-02
 StdCH4 = 3.114028E-03
 VppCH4 = 1.617000E-02

7h30 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)

8h30 HV is ON

recipe_recipe_LI_TL_RI_all_20260402_14_37_41.txt loaded

10h16 Energy = 50 MeV, Laser Phase 72 dg., Sect. Phase 220 dg., Sect. Att. 2.51 dB, I_Gun -116.9607 pC, I_Linac -140.3135 pC, I_TL -131.2199 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.
10h18 Energy = 50 MeV, Laser Phase 72 dg., Sect. Phase 220 dg., Sect. Att. 2.51 dB, I_Gun -98.3498 pC, I_Linac -120.5804 pC, I_TL -111.3074 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.

11h19 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 219 dg., Sect. Att. 2.62 dB, I_Gun -92.4726 pC, I_Linac -115.7833 pC, I_TL -106.6548 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.
13h55 Energy = 50 MeV, Laser Phase 79 dg., Sect. Phase 224 dg., Sect. Att. 2.58 dB, I_Gun -94.4872 pC, I_Linac -117.7063 pC, I_TL -107.6493 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.
 

7h30 : mise en chauffe en remote (frigo/chillers, modulateur, laser, cyclage)

9h00 HV is ON

10h33 Energy = 50 MeV, Laser Phase 77 dg., Sect. Phase 217 dg., Sect. Att. 2.546 dB, I_Gun -98.9021 pC, I_Linac -131.1291 pC, I_TL -120.2702 pC RF_Ampl. 148.7161 kV, RF_Phase -36.5 dg.
12h53 Energy = 50 MeV, Laser Phase 78 dg., Sect. Phase 218 dg., Sect. Att. 2.577 dB, I_Gun -97.6327 pC, I_Linac -124.7496 pC, I_TL -111.3515 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. receipt 10 Apr last, X flux 35e3 pA, Las. Att. 276
14h56 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 215 dg., Sect. Att. 2.53 dB, I_Gun -94.9526 pC, I_Linac -122.0817 pC, I_TL -108.2541 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. sometimes it was 50e3 pA, Las. Att. 276

19h08 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 212 dg., Sect. Att. 2.551 dB, I_Gun -350.6393 pC, I_Linac -372.038 pC, I_TL -364.2529 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. Las.  Att. 375

19h10 Energy = 50 MeV, Laser Phase 75 dg., Sect. Phase 212 dg., Sect. Att. 2.551 dB, I_Gun -368.8974 pC, I_Linac -390.9133 pC, I_TL -382.9227 pC RF_Ampl. 148.7161 kV, RF_Phase -35 dg. Las.  Att. 415

20h44 Energy = 50 MeV, Laser Phase 74 dg., Sect. Phase 215 dg., Sect. Att. 2.605 dB, I_Gun -87.9133 pC, I_Linac -113.5951 pC, I_TL -101.2012 pC RF_Ampl. 148.7161 kV, RF_Phase -36 dg. Las.  Att. 280

20h52 Thomx was stopped

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)

8h00 : mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

02/06/2026

~15h30 Starting all system

16h Start up of the modulator, laser, magnets

Problem with the shutter, it is in the orange state. 

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

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

11h17 Stop ThomX

11h20 Try to restart the accelerator. Start-up modulator, laser, fridge, chillers

Problem, with all magnets control All DS are in FAULT state. Help is needed.

It is solved.

MPS prevents klystron output power from turning on. Probably due to the closed FP valve.

15h45 ThomX was stopped.

07h35 Start-up modulator (does not go to standby), laser, magnets, cycling.

9h50 HT ON

~10h30 Electricity cut

14h Restart of all the machine...

Almost all systems were restarted, except for the photocathode laser.

17h40 ThomX was stopped

09h00 Start-up modulator, laser, fridge, chillers

After discussion with Daniele

Goal/Priority: Check for leakage in the FPC

10h17 HV is on, cycling all magnets. The chillers were not taking the set temperature (Consigne). It was necessary to reset it in the DS "RF Canon+Section"

10h24 The modulator set to standby. Check for leakage

11h00 ThomX was stopped

07h30 Start-up modulator, laser, fridge, chillers, cycling remotly

Vacuum in the FPC is still ~1e-7 (sometimes goes to ~7-8e-8);

No RF signals. The same problem.

Vacuum problem in the half ring; same as on Friday. Solved by Eric.

Problem with SEPTUM. It does not start.

RF cavity in the Ring can be se only to 10 kV. We can not set other voltage. Maher checked, probably the rror with profibus. Hep is needed.

10h30 starting the linac. Transport of the beam in the TL.

Cameras do not work corretly, so it is difficult to adjust the energy spread of the beam.

Septum problem prevents us to inject in the ring.

10h56 Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.43 dB, I_Gun -71.6393 pC, I_Linac -69.4399 pC, I_TL -69.8472 pC RF_Ampl. 10.8122 kV, RF_Phase -48.5 dg.

11h JN is helping with the RF cavity

13h The problem with RF cavity is not solved, the reson why the voltage does not inrest and stays at 10 kV is not clear.

Maher with JN tries to solve the problem with SEPTUM,

13h20 Septum is OK now. Beam is in the ring w/o RF. recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

13h30 Laser Att. 340

13h33 Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.52 dB, I_Gun -92.8156 pC, I_Linac -122.1748 pC, I_TL -95.4294 pC RF_Ampl. 0 kV, RF_Phase 0 dg.

14h Mistreggiring problem. Nicolas found that the IP address of Rigol changed.

The colleage from SOLEIL will come in the afternoon to see the problem with the RF cavity.
The PC in the control room (client 1 and 2) are very slow, not clear what is the reason.

15h17 Kickers off. TL/DP off. Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.52 dB, I_Gun -102.5088 pC, I_Linac -99.2102 pC, I_TL -0.0013676 pC RF_Ampl. 0 kV, RF_Phase 0 dg.

I am trying to check the beam charge using TL/FC01. The cable from wac02/ch0 (A9 on cross-panel #xxx) was connected to the oscilloscope CH2 (impedance 1 MΩ). According to Vincent, the cable length is 31 m, and the capacitance is 2.5e-9 F. At the operating point, the dark current and the beam charged the cable (approximately 6 μs after triggering) to -35.69 mV. The dark current alone charges the cable to -13.7 mV (with the screen inserted). Therefore, the beam charge is Q=C*V=2.5e-9*22e-3=55e-12 C. With the screen inserted - DeltaV=22.7 mV. The first attempt to change the position of the beam does not increase this voltage significantly (but reduces it at large displacements). Reducing the solenoid current to 180 A increases the voltage on the cable, but the DeltaV remains almost the same: 23.3 mV (58 pC). Thus, there is a certain discrepancy between ICT measurements and result of these measurements that needs to be understood.

17h35 The RF resonator is now working. But the RF resonator DS does not show the frequency. It is necessary also to adjust the phase of the resonator.

17h43 ThomX was stopped