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.
 

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

10h Problem with modulator; It went to OFF and it does not start. Need help;

12h40 Fixed by Maher

12h42 HV is ON.

 recipe_recipe_LI_TL_RI_all_20260410_18_30_00.txt loaded. Beam is in the ring with RF, all is OK

13h02 Energy = 50 MeV, Laser Phase 62 dg., Sect. Phase 222 dg., Sect. Att. 2.353 dB, I_Gun -84.0745 pC, I_Linac -110.6456 pC, I_TL -97.627 pC RF_Ampl. 148.7161 kV, RF_Phase -42.5 dg.

==>40 MeV

recipe_recipe_LI_TL_RI_all_20260414_16_25_18.txt saved

16h36 Energy = 40.2 MeV, Laser Phase 66 dg., Sect. Phase 222 dg., Sect. Att. 3.974 dB, I_Gun -109.5905 pC, I_Linac -137.9429 pC, I_TL -118.206 pC RF_Ampl. 148.7161 kV, RF_Phase -42.5 dg.

recipe_recipe_LI_TL_RI_all_20260414_16_37_59.txt saved. Flat orbits (both), good storage, small vert. size at EL/SST01

17h07 Energy = 40.2 MeV, Laser Phase 58 dg., Sect. Phase 214 dg., Sect. Att. 4.001 dB, I_Gun -119.9999 pC, I_Linac -147.2619 pC, I_TL -131.3768 pC RF_Ampl. 148.7161 kV, RF_Phase -42.5 dg. X =+2.5 mm
 

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.
 

8:50 Mise en chauffe

10h Starting the beam

Tuning of the TL

We started from the last Friday setting and the beam storage was not succefull.

Optimization of the storage. The RF freq was set to 500.424 MHz. RF voltage was 40-100 kV

After several optimizations, the good storage was obtained ~15h

The final RF freq 500.4099 MHz

The data was taken concerning the betatron oscillations. Should be analysed offline.

16h40 Shift finished.

Start of the modulator at 9h45

11h30 Problem with water regulation. Probably falseread of GUN PT100. Hayg and Viktor is tryig to adjust manually the temperature of the chiller for RF gun. We stopped at the settings as attached.

12h20 Trying to set-up the beam

13h Problem with the Linac Trigger Laser delay, laser pulse is after the RF pulse end (see screenshot attached). We tried to ajust the delays but inthis case the dark current is very large ~80 pC, bigger then the actual beam charge. We came back to the initial settings.

Not clear what has been changed since yesterday. Need help from the injector team.

15h30 Problem is solved. It was the wrong value of the Largeur pulse HT. The nominal value is 5 us.

16h Setting the injector and try to inject in the ring

Optimization of the TL. It would be really good to have the

- Closed dispersion

- Beam centered in the QUADs (at least 2 last ones)

The TL was set, so that we can inject with almost no losses (see screenshot)

Was difficult to get several turns. It turnned out that the kicket timig was not correct. Not clear who chqnge it.

19h We reistablished the storage and try to optimize it.

10h Intervention to repair the water leakage. It was repaired.

New problem with vacuum pomp is found in the ring. The two problems are due to the water leakage. Intervention is ongoing.

12h Warm up of the machine

14h30 Start up of the machine in the mode LI-TL-EL. Goal: tune the injector and perform the measurements.

Mistriggering. All interfaces to see the current freauency do not respond.

Intervention of synchronization team is needed to continue.

15h30 Stop the beam for vacuum intervention .

8h50 Warming up the machine

10h start the beam

Tuning the injector

Beam is injected in the ring.

Problem to start the RF cavity (no injected power, the delta f jumps a lot and the motor position can not converge). Mohamed is contacted.

Problem to restart the DS for the control of the FP cavity table. The CC team is contacted. We are waiting for intervention.

Check of the Ring frequency

11h25 Modulator on stand by

Thanks to Kevin and Mohamed the RF cavity is OK. Restqrt of te beam.

In parallel, Vincent, Ronic and Kevin are investigating the sunchro with the FPC.

The injector is very unstable in energy (random slow change on the TL BPM 2 + usual problem with attenuator ) and LIL phase change/drift (from 114 to 88 deg. during the day). Presence of misstrigering from time to time during the day.

For a certain parameters, a good storage was obtained. But then, due to change of injector parameters the conditions were not kept. Work on the BBA.

Very difficult to work in such conditions, especially on BBA.

9h20 Start modulator, cycle magnets

10h20 Intevention Vincent sur PA

10h40 Scan charge phase

12:00 Tentative demarrage cavite

16h00 Diagnostics switched to 1Hz . We returnd to 10 Hz few moments later.

Mohamed turned Cavity to automatic tuning. RF Amplitude 40 kV . Beam is stored.

Understanding of settings of LIbera with N. Hubert.

Tune measurements with excitation coming from extraction kicker (780V),  images below.

First time horizontal tune is measured (0.36-0.37) , and is close to the model one. Data stored for postprocessing.

08h29 Warm-up ThomX: Modulator, Laser, Fridge
Chillers were started, cycling all magnets.

10h48 Beam is in the ring after resolving a lot of problems. The receipt loaded: recipe_recipe_LI_TL_RI_all_20260115_18_10_34.txt, with Linac-Tl :   recipe_recipe_TL_all_20260116_10_52_12.txt, recipe_recipe_LI_TL_straight_all_20260116_10_51_52.txt. Linac steerers: H [0.59 -2.74], V [-2.48 3.06]

RF Gun phase 140 dg. Sect. Att. 2.523 dB, Sect. phase  190 dg. Laser att. 409, charges (BPMs): -100, -95, -98, -98 -97 pC , RF 100 kV, phase -8.5 dg. The MRSV camera dozs not operate.

11h44 Problem with cameras

All triggers dissapeared

Nicolas fixed it, but phases is different: RF gun phase 96 dg., sect phase 203 dg. RF cav. phase?

12h50 Laser phase jumped to 171 dg. Sect. phase ==> 210 dg. Manual phase shifter set back to 1176. The laser att. ==> 359 for RF gun charge -115 pC (BPM)

Ring studies Model-Machine

From time to time laser fase jumps.

Triggers stopped. Nicolas is looking at it.

14h40 Beam dissapears in between the studies. Every time we retune the linac...

No triggers!!!!

18h04 LOCO is on its way. Time to times the laser loses phase synchronization. It's terrible.

18h20 We've lost laser synchronization.

18h21 Stop ThomX

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.

08h50 Warm up of the modulator

8h50 Thomx warmup

10h20 HV is 'ON'

RF Gun phase is 254 dg. Sect phase is 243 dg. Sect. Att. 0.119 dB, Charges: -112 pC, -113. pC, -140 pC. Linac steeres: H [1.00 -3.49], V[1.92 2.13]

11h00 Beam is in the ring. Receipt 70 MeV from references BPM TL2 X=-1 mm

11h30 HV went standby. Maher fixed it.

11h32 HV is 'ON'

BPM transmission does not work properly (see screenshot)

Good storage at 70 MeV with the receipt.

Laser phase adjustment during the shift a few times

Work on the BBA at 70 MeV

For this, measurement of the ORM. There is a differennce with the model ORM. Attempts to tune the ring from the model. Work should be continued.

Due to this, only manual BBA can be done at the moment.

Starting also to adress the manual BBA in the TL. We used HCOR2 and QP5 and TL BPM.03. The results are not clear (big element-to-element distances). To be continued.

18h STOP THOMX

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

08h41 HV is on

08h49 RF gun phase 152 dg., sect phase 208 dg. beam is in the ring W/O RF

08h58 Standby, Cycling all magnets

09h30 HV is on

12h47 Standby

12h58 HV is on

14h26 Laser phse jumped from 143 dg. to 261 dg. Ring RF cavity phase ==> -73.5 dg. from -15 dg.

16h40 Laser phse jumped from 257 dg. to 44 dg.Ring RF cavity phase ==> -15 dg. from 33 dg.

17h07 Laser phse jumped from 44 dg. to 218 dg. Ring RF cavity phase ==> -83.5 dg. from +33 dg.

18h13 HV is off, cycling ring quads

18h48 HV is on

22h01 Stop ThomX

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

08h43 HV is on

RF gun phase (laser phase) for maximum charge is out of the range, close to 360 dg. or 10 dg. Help is needed!

09h13 Kevin fixed it.

Stady of beam decay in the ring at different beam charges, streeck camera measurements, LOCO, vertical BBA attempt.

19h21 Stop ThomX

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

08h57 HV is on

09h22 Beam is in the ring W/O RF, recipe_recipe_LI_TL_RI_all_20260219_13_17_17.txt loaded

09h25 RF 100 kV

09h42 F gun phase 23 dg., Sect. att. 2.47 dB, Sect. phase 218 dg., charges (ICT): about -100 pC, charges(BPMs): all -105 pC

The receipt saved: recipe_recipe_LI_TL_RI_all_20260220_10_42_56.txt ==> Vert. around IP +3 mm to -2 mm

The receipt saved: recipe_recipe_LI_TL_RI_all_20260220_10_43_52.txt==> Vert. around IP -1 mm to +1 mm

12h17 Standby

13h31 HV is on. Shunt resistors were removed from the dipoles 

14h28 Standby. Shunt resistors of 15.4 Ohm installed

15h09 HV is on. Charge dropped. Laser att. 244 ==>260 to restore 100 pC

08h15: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

08h15: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

09h19 HV is on

RF gun phase 78 dg. Sect. Att. 2.56 dB, sect. phase 219 dg. RF 50 kV. Linac steerers:  H [-0.36 -2.65], V [-2.49 3.24].

Scan ring RF frequency.

16h40 ThomX stopped

07h55: mise en chauffe en remote (frigo/chillers, laser, modulateur, cyclage)

09h00 HV is on

09h35 recipe_recipe_LI_TL_RI_all_20260226_14_47_33.txt loaded. Beam is in the ring, RF cav. 100 kV, phase 32 dg., F=500.108655MHz

RF Gun phase 75 dg., Sect. att. 2.532 dB, sect. phase 220 dg., linac steerers: V [0.23 -2.68], V [-2.49 3.27], charges (BPMs) around -110 pC

At F=500.108655MHz and TL/BPM02 X=2mm the orbits are almost the same with and without RF (see screenshot)

At given ring settings, the MRSV size is highly dependent on the DPI, septum, and kicker settings, which are determined by the injection energy (Sect. att. and line phasing).

A combination of DPI, septum, and kicker settings should be adjusted to reduce the MRSV size.

12h35 The laser spot has moved outside the screen!!! Help needed!!!

Kevin fixed it.

Additional research showed that F=500.10045 MHz is suitable for ring operation.

15h55 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

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

08h45 Start-up modulator, laser, magnets

09h38 Shutter Laser Linac is yellow. Tuning off the gun operation key does not change it to the red. Need help.

09h55 HV is on

09h56 HV is off. The fridge was started then chillers.

10h20 The laser shutter is OK.  HV is on

recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

Linac steerers were adjusted.

11h35 Energy = 50 MeV, Laser Phase 9 dg., Sect. Phase 223 dg., Sect. Att. 2.19 dB, I_Gun -48.3388 pC, I_Linac -54.8343 pC, I_TL -53.5573 pC RF_Ampl. 0 kV, RF_Phase -30.5 dg.

Beam is in the ring W/O RF

11h45 RF is on

11h54 Energy = 50 MeV, Laser Phase 9 dg., Sect. Phase 223 dg., Sect. Att. 2.12 dB, I_Gun -49.1448 pC, I_Linac -55.6953 pC, I_TL -54.5153 pC RF_Ampl. 49.3668 kV, RF_Phase 35.5 dg.
It looks like RF cavity tuning does not work. Help is needed.

12h07  Mesure d'energie en sortie canon sur LISST1 en fonction du courant du steerer LI/PS/STR.01-H.01

'Energy=4.83MeV'

Several scans of the laser attenuator 200 to 430 at the Gun attenuator 0, 1, 2, 3 dB but at the same phase.

13h22 Standby

13h32 HV is on

15h17 Thomx was stopped