08h00 ThomX started by Maher

09h50 Problem with vacuum in the septum. TL-V3 and EL-V1 are closed.

ThomX configuration changed to 'Linac'.

0955 Laser is 'On'

10h03 Problem with vacuum was fixed. ThomX configuration changed to 'ThomX'.

10h05 Cycling all magnets

10h10 HV is 'On'

10h20 From time to time TO-V3 and EL-V1 close. Septum vacuum is 2.6e-10

Septum power supply is interlocked

10h55 , RF gun phase is 235 dg., Sect. phase is 216 dg., Att. = 2.38 dB, TL/BPM2 X=0.2 mm , Charges: -91 pC, -90 pC, -98 pC, Linac steerers: H [0.84 -2.88], V [-2.47 2.8], receipt from 20250321 12:30:52

11h27 V6 interlocks

11h49 RF gun phase is 225 dg., Sect. phase is 209 dg., Att. = 2.46 dB, TL/BPM2 X=0.2 mm

12h46 to 13h10 Emittance measurements at 50 MeV

13h Problem with Pulsed Elements => fixed by Kevin and Maher

13h30 Tuning of the linac for 70 MeV, emittance measurements.

14h Check the machine at 50 MeV

15h25 The modulator at standby mode. Access to the bunker.

15h45 61.5 MeV receipt from 14/02/2025

Synchronization problem,

17h00 RCDS on injection

17h19 RF Gun phase is 224 dg., Sect. phase 221 dg. Att. 0.975 dB, Charges: -107 pC, -105 pC, -115 pC. TL/BPM2 X=1 mm, RF cav. 100 kV, phase -34 35 dg. manual phase sfifter 7809, phase shifter to measure amplitude 6759. Receipt 20250331 17:12:34

08h42 Start ThomX: Morulator, firg, laser

08h47 Chillers, cycling all magnets

10h40 HV is 'ON'

10h58 RF Gun phase is 225 dg. Correctors H [0.82 -3.05]; V [-3.1 3.28], Sect phase is 220 dg., Att. 0.975 dB, Charges: -95 pC, -94 pC, -103 pC

11h12 Beam in the ring RF cav. at 50 kV, phase -34.5 dg.,  receipt from good 20250331 18:08:02

11h25 Interlock by Radioprotection in the laser room

11h48 Fixed by Atanas, HV is 'ON', RF gun phase is  220 dg., Sect. phase is 224 dg. Linac correctors H [0.82 -3.05]; V [-3.29 3.19],

12h06 emittance measurements by QP3, QP1 and QP2 at zero hor. 3.3 mm*mrad, vert. 2.9 mm*mrad

12h19 beam in the ring TL/BPM2 X=0 mm

13h20 Going to 40 MeV. Sect. Att. set to 4.095 dB, Sect. phase is 205 dg. TL/DP current set to 125.38 A, Linac steerers H [1.19 -3.25], V [-3.05 3.47]

RF cavity 50 kV, Freq=500.11896 MHz

16h42 RF cav. at 100 kV, Phase -7.5 dg. receipt 20250401 _15_25_35, RF Gun phase 219 dg. Sect. phase 201 dg. Att. 4.084 dB, TL/BPM2 X=4.5 mùm

17h16 Stop ThomX

Freq. for RF Cav. set to 500.10051 MHz (should be 500.10045 MHz)

08h15 Start Thomx: modulator, frig, laser

08h21 Chillers started, all magnets cycling

Filesystem very slow

Allarm vacuum valve are in alarm

RAC.17-RDP.01 still faulty

09h38 HV is 'ON'

10:15 Calc DS for attenuators was crashed. It restarted at 0dB attenuation...

12:43 SR on target with Iris closed

Alignemnt...

17:30 Measurement of the bunch length in the ring  ~140ps

08h22 ThomX was started: modulator, frig, laser

08h28 Chillers was started, all magnets cycling

09h45 HV is 'ON'

There was a problem with the section phase shifter motor. It was fixed by moving the motor a lot.

11h11 RF Gun phase is 149.6 dg., Sect. phase is 207 dg., Att. is 2.77 dB. TL/BPM2 X=0.9 mm. Linac steerers: H [0.54 -2.76], V [-2.29 2.61], -36 pC, -36 pC, -39 pC, RF cav. at 50 kV, phase 21.0 dg. TbTSum in the ring about 2e7

13h0.5 TL optics was set to MADX simulated one. After adjusting the DPI and the septum, charge in the ring and X ray flux did not change. (receipt 20250502_13_04) RF Cav. at 150kV, phase 13.5 dg

13h20 dispersion measurement in the TL

15h38 New lattice loaded, injection was adjusted as well as the ring elements a little bit.

17h00 ThomX was stopped

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

Goal: Beam Loss Monitors and Ring injection at high charge. Studies of the injector for high charge. Emittance measurements.

08h33 ThomX was started: modulator,frig, laser

08h40 Chilers were started, all magnets cycling

11h05 HV is 'ON'

11h15 RF Gun phase 194 dg. laser att. 280, Gun charge -100 pC.  Breakdowns in the RF gun

12h14 Breakdowns in the RF gun. Vacuum interlocks. Drop HV to 1210.

12h30 Restore HV

Increase of the charge from 100 pc to 450 pC. Tuning of the injector and ring injection. We suceeed to minilize the injection losses for the high chege. After our studies,  the charge in the ring incresed proportinally to the charge in the linac measured with the BPM.

The recettes were saved in the folder REFERENCES

50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22 (best storage with min losses)

15h50 RF gun phase 190 dg., Sect. phase 206 dg., sect. Att. 2.61 dB, Laser Att. 420, Charges (BPMs): -451 pC, -451 pC, 437 pC, Sum(TBTSum = 5.4e11). Receipt: 50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22

Emittanse mesurement with QP3 (Isol=235 A)

beta x = 5.0264 alpha x = -1.5425 Horizontal normalized emittance 11.6 mm*mrad

beta y = 7.8251 alpha y = -3.0341, Vertical normalized emittance 7.9 mm*mrad

16h35 RF gun phase 184 dg., Sect. phase 204 dg., sect. Att. 2.69 dB, Laser Att. 303, Charges (BPMs): -219 pC, -216 pC, 240 pC, Sum(TBTSum = 3e11). Receipt: 50MeV_450pC_BLMRCDS_Ratio1_20250527_15_12_22

Emittanse mesurement with QP3 (Isol=235 A)

beta x = 51.2017 alpha x = -15.6429, Horizontal normalized emittance 1.1 mm*mrad

beta y = 5.7487 alpha y = -2.2848, Vertical normalized emittance 4.5 mm*mrad

08h00 ThomX was started

Goals: Emittance measurements, ring optics study

10h00 HV was 'ON'

RF Gun phase 240 dg. (the previous day was 190 dg.), Sect. Att. 2.42 dB (the previous day was 2.61 dB) Laser Att. 280, Charge -106 pC

Emittance measurements vs RF Gun phase for 109 pC, 208 pC, 360 pC

Ring optics study.

17h20 ThomX was stopped.

08h15 ThomX was started; Modulator, Frig, Laser

08h21 Chillers were started, cycling all magnets

09h40 HV is 'ON'

Scans of phase charge were performed

10h22 Beam in the ring, receipt from 20250605_17_33_45. Linac steerers: H [0.36 -2.55], V [-2.36 2.66], Phases: RF Gun  165 dg., Sect. 214 dg., Sect Att. 2.6, TL/BPM2 X=0, Charges (BPMs): -114 pC, -113 pC,  -125 pC, -125 pC

MRSV: Hor. Std = 19.2812 pix, Vert. Std = 13.8814 pix

11h40 Going to 70 MeV. Sect. Att. 0.228, Phase 237 dg., RF Gun Phase 150 dg.

At F RF cavity 500.0328 MHz interlock on water cooling. Fixed by JN.

Trying to find horizontal tune.

At 70 MeV the MRSV camera saturated.

Work on the orbit correction.

Vertical scan with FPC. Sigma _y = 

The receipy is saved and can be used for the spectrum measurements. Further studies to be continued if needed.

FPC Table Vertical Scan: sigma Y =132 um

17h02 Stop ThomX

08h40 ThomX was started: Modulator, Frig, Laser

08h45 Chillers were started, cycling all magnets

09h56 HV is 'ON'

10h14 There is problem with Wavecatchers (see screenshot). Even dark current is absent

Wave catcher power supply 2 (5V) is dead... changed temporaly with a spare. (solved)

There is problem with the section phase shifter

12h10 All problem fixed, beam in the ring 50 MeV

Going to 40 MeV

13h25 Sect. Att. 4.03 dB, Phase 203 dg., RF Gun phase 166 dg. Charge -85 pC, receipt 20250613_13_25

Going to 43.7 MeV

14h20 Sect. Att. 3.5 dB, Phase 210 dg., Gun phase 162 dg  TL/BPM2 X=-1.5 mm, Receipt 20250613_14_19_57

16h00 35 MeV. Sect Att. 4.98 dB, phase 202 dg. Receipt for the linac 

16h10 HV  on standby Access to the bunker

8h49 allumage modulateur, chiller, laser

10h00 Beam ON

Prise de données Cf images jointes.

1 degree Celsius ~ 3.46 deg phase

15h04 modification phase canon à 281 pour regrouper le faisceau sur TL/BPM2

16:55 Stop ThomX

Vérif position laser photocathode :

--> bouge de 1mm en Y et 0.2 en X

Nouvelle position:

• 5.003
• 4.553

--> bouge de <0.3 en X et 0 en Y. 

Qmax : 321°
Emax : 271°

Quad Align :

• 'steerers : ',  li/ps/str.01-h, v    1.0406, -2.4368
• 'steerers : ',  li/ps/str.02-h, v    -3.2289, 2.8844

11h40 Thomx warm-up

12h35 HV is ON

12h40 HV 1215 V

12h50 Cycling all magnets

13h40 Beam is in the ring without RF

13h50 The FR cavity power has been restarted.

14h14 RF Gun phase 221 dg. Sect. Phase 206 dg. Sect. Att. 2.42 dB Laser Att. 286 Charges:  -99 pC, -99 pC, -100 pC Linac steerers H [0.84 -3.18] V [-2.46  3.03]. MRSV light on the streak camera

14h31 The modulator is on standby. Daniele goes to the bunker with Marie to install the horizontal slit for MRSV

14h52 HV is ON

Image MRSV sigX=36.2 sigy=14.8 pixels 

Intensite sur la streak reduite ==> On va essayer de deplacer la fente du coup

15h09 The modulator is on standby. Daniele goes to the bunker with Marie.

15h33 HV is ON

15h33 Image MRSV sigX=46.7 sigy=14.8 pixels  avec la nouvelle positions de la fente - cf screenshot

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

08h37 Chilers were started, cycling all magnets

09h38 HV is ON

The receipt loaded: recipe_recipe_LI_TL_RI_all_20251023_14_56_13

10h16 The beam is in the ring. RF Gun phase 233 dg., Sect. phase is 200 dg., Att. 2.34 dB,  linac steerers: H [0.75 -2.98], V [-2.63 3.25], Charges: -101, -100, -102 -102 pC (from BPMs), TL/BPM02 X= -3, RF cavity 100 kV, phase 14 dg.

11h18 Laser feedback was reset.

phases were reset RF Gun 256 dg. Sect. 211 dg. RF Cav. 9.5 dg.

Scanning TL/QP3 at QP1=QP2 = 0

Scanning TL/QP3 at QP1= -0.17 A, QP2 = 3.5 A

Scanning TL/QP1 at QP2=QP3 = 0

08h40 Warm-up ThomX: Modulator, Laser, Fridge

08h45 Chillers were started, cycling all magnets

09h45 HV is ON

09h49 HV was set to 1215 V

10h15 the receipt recipe_recipe_LI_TL_RI_all_20251023_12_06_10.txt was loaded, linac phases, section attenuator and steerers was adjusted

10h20 The beam is in the ring W/O RF. RF Gun phase 215 dg., Sect. phase 207 dg., Sect. Att. 2.47 dB, TL/BPM02 X=-2mm, Laser Att. 274,Charges (BPMs) -110, -109, -80, -80 ???

10h33 Data taking for different TL/BPM02 X

10h50 RF 100 kV, Phase 11 dg. YL/BPM02 x=-3 to -4 mm, Very good storage, but losses in the TL,  Check alignment

11h11 RF gun phase 202 dg. Secr. phase 206 dg. RF phase 3.5 dg. All charges are about -100 pC

11h27 TL/BPM02 X ==> 0 mm to minimize Sync. osc. Hor. Tun 0. 159

11h41 Hor. tun ==> 0.169

11h56 BBA

12h21 RF Gun phase ==> 207 dg.

12h32 Hv was set on standby

13h44 HV is ON

14h14 RF Gun phase ==> 211 dg.

16h52 Stop ThomX

Matin :

Soucis synchro :
- Nicolas les a redémarré
- kevin est vebu vérifier la synchro du laser, le signal du 500 Mega un peu faible (à vérifer)
- toujours des coups perdus

Soucis Alims :
Dipole --> 250A impossible de forcer 159.3
- currentSetpointPM=159.3
- currentSetpoint=250=Current ...
Ds passé en erreur. Ok L'alim était en local ....

Soucis phase section :
Problem with  calc/li_hfi/write_dep.01-mot.01 does not work.

To change section phase li/hfi/dep.01-mot.01 was used

18h08 Unable to get low energy spread on TL sst2. It seems we observed a scattered beam.

18h15 Gave up. Stop ThomX

08h30  Warm-up ThomX: Modulator, Laser, Fridge

08h36 Chillers were started, cycling all magnets

09h33 HV is ON 

09h34 HV set to 1215 V RF Gun phase is 188 dg.

11h09 Help needed! Something is wrong with the TL bends.

11h44 Something is wrong with the section attenuator. Reducing the attenuation results in a decrease in the section's output power.

12h15 OK, finally we got  it. RF Gun phase 182 dg. Sect. phase 298 dg. Sect. Att. 0.59 dB, 50 MeV, Li/HFI/ATT.01-MOT.01 ==> 311 steps Sect. Output -0.123 V

Sect. Output -0.123 V Mot. pos. 1699 steps but Sect phase = 211 dg. Calc/Li/HFI/ATT.01-MOT.01 is not working properly.

12h31 Beam is in the ring W/O RF

12h35 RF 100 kV

BBA Hor.

BPM Ind.  Offset

[1 1] ==>-0.129

[1 2] ==>0.017

[1 3] ==>-0.722

[1 4] ==>0.425

[1 5] ==>-0.022

[1 6] ==>-0.139

[1 7] ==>0.091

[1 8] ==>0.272

[1 9] ==>0.375

[1 10] ==>-0.022

[1 11] ==> -0.272

[1 12]  ==> -0.400

08h34  Warm-up ThomX: Modulator, Laser, Fridge

08h40 Chillers were started, cycling all magnets

09h40 HV is ON but cannot trig because the interlock on low SF6 pressure. Assistance asked.

10h40 Modulator set to standby, because nobody responded.

SF6 pressure was fixed.

14h00 Beam started. The laser iris was set to 2 mm because at 1.3 mm beam was with two cores at the linac exit.

Receipt used: all_20251106_13_58_04

RF gun phase 233 dg. Sect. phase 211 dg., Motor position of the sect. Att. about 1700 steps to get 50 MeV. Charges (BPMs):  -110 pC, -110 pC, -113 pC, -113 pC. Do not use calc/li/hfi/att.01-mot.01 to adjust section RF power in dB, use li/hfi/att.01-mot.01 instead.  Level of a signal from the section output should be about -0.125 V at 50 MeV.

14h16 Beam is in the ring, RF 100 kV. TL/BPM02 X=-1mm.

BBA for a vertical direction.

BPM V [1 1] V offset = -0.054 mm

BPM V [1 6] V offset = 0.165 mm

BPM V [1 7] V offset = 0.025 mm

BPM V [1 12] V offset = 0.366 mm

16h29 Stop ThomX

15h09 Cycling all magnets

15h12 HV is ON

15h15 The modulator was set to standby

15h34 HV is ON

Tests on Ring + Streak camera to measure the bunch length. Triggering was not perfect (many jumps, even with help from Daniele)

Laser charge is now lowered (max around 300 pC) , should be realign soon.

18:40 stop

09h31 Warm-up ThomX: Modulator, Laser, Fridge

09h36 Chillers were started, cycling all magnets.

09h56 Unable to start MRSV and EL cameras. Need help.

10h33 HV is ON

10h40 HV set to 1215 V

11h24 Beam in the ring W/O RF

11h40 RF 100 kV, phase 3.7  dg. RF Gun phase 210 dg., Sect Att. 2.37 dB, Sect. phase 211 dg., Charges (BPMs) -161, -153, -158, -169 pC, Linac steerers H [0.88 -3.00], V [-2.52 3.08]. Receipt recipe_recipe_LI_TL_RI_good_20251106_16_23_16.txt

12h35 Vacuum interlock V1, restarted

Orbit correction, check with BBA and LOCO after adjusting the device indeces in MML.

16h46 Going to 70 MeV T sect. consigne 28.5ºC, Sect. Att. 0.137 dg., DP 255.8 A, TL/BPM02 X=-1.5 mm, 

As it was discussed before, the dipoles for unknown reasons were set to - 2A from nominal current in the saved receipt. We changed the current to the nominal one. Beam tuning ongoing for 70 MeV.

recipe_recipe_LI_TL_RI_good_20251125_18_31_45.txt W/O correctots in the ring, Manual phase shifter 6129, RF phase 14 dg.

to be continued.

18h40 Stop thomx

08h31 Warm-up ThomX: Modulator, Laser, Fridge

08h36 Chillers were started, cycling all magnets.

10h07 HV is ON

10h09 HV set to 1215 V

10h330 Beam is in the ring 70 MeV