08h35 Warm-up ThomX: Modulator, Laser, Fridge

Programme shift : verifier que la recette orbite plate utilisee lors du shift du 24/02/2026 (= orbite PLATE, vers 15h) est toujours ok apres l'ajout de resistance sur dipole anneau (resistance installee apres le shift, = le 24/02 au soir)

08h40 Chillers were started, cycling all magnets.
09h47 HV is on but there are no triggers. Failed to connect to device li/op/opt.02-las.01-asp.01. The photocathode laser control mashine is off.
10h10 The photocathode laser control mashine is on. The laser amplifier was started.
10h29 Misstriggering caused modulator interlocks
10h44 It is OK with triggering, exept the photocathode laser.
11h15 Laser is ok, phase 133 dg.

11h48 The laser spot moves out of the screen, Hayg fixed it

12h35 Transfocator_20260225_17_33_57.txt loaded. Linac steeres were adjusted. Laser phase 127 dg., Sect. att. 2.532 dB, sect. phase 225 dg. linac steerers: H [-0.21 -2.66], V [-2.47 3.32], RF 100 kV, phase -39 dg., charges around -100 pC

On ne voit pas le centre du faisceau X sur DECTRIS - Trop allonge verticalement
Viktor "ajuste" la recette ==> on voit un tout petit petit petit peu mieux le centre ...
Flux < 5000  .....
Scan FPC ==> faisceau enorme cf screenshot 1_scanFPC_recipe_ou_on_voit_le_centre.png

Retour recette du depart orbites a peu pres plates plates
Flux minuscule
Scan FPC ==> faisceau enorme cf screenshot 2_scanFPC_receipe_FLAT_centre_pas_visible.png

Optimisation phases etc par Viktor
Flux minuscule
Scan FPC ==> faisceau enorme cf screenshot 3_scanFPC_receipe_FLAT_OPTIM_centre_pas_visible.png 

16h58 Standby, removing the additional shunt resistor from the bend #3

17h42 HV is on

18h00 recipe_recipe_LI_TL_RI_all_20260224_14_54_20.txt loaded
Faisceau a peu pres au centre du tube
Flux ~ 20.000
Comparaison avec shift du 24/02 (spectre onaxis et V+40) ==> cf screenshot compar_20260224_20260304_after_cut_resistance.png 
==> c'est OK, spectres tres similairees

18h26 ThomX stopped

CONCLUSION : impossible d'obtenir un faisceau electrons correct avec la nouvelle resistance. Retirer la resistance a permis de retrouver les resultats du 24/02

DEMAIN : demarrage des etudes matching a ce point de fonctionnemenet
A 100 pC
  - Sol 230
  - Sol 242
  - Sol 250 100 pC,
puis SOL 230 a 200 pC 

08h25 Start ThomX

09h55 HV is 'ON'

10h18 RF Gun Phase is 159 dg. Sect. Phase is 208 dg. Att. 2.66 TL/BPM2 X=-2mm, Isol =230 A, Charges: -115 pC, -95.7 pC, -100 pC

Beam injected to the Ring. There is storage there.

10h25 Ring RF is 'On', 100 kV. Storage OK

10h35 Extraction kicker is 'ON' del. is -12.4 us

10h37 TL/BPMé X=+1 mm to minimize synchrotron oscillations. Tune is 0.17

Response matrix measuring

11h45 70 MeV Receipt for 70 MeV with storage: Sect. Att is 0.204, Phase Sect is 237 dg.

12h00 RF 50 kV Beam is killed by RF

12h10 Change frequency to 500.08095 MHz

Many scans in Frequency- slow no result. Tune optics.

17h30 Hayg by scanning RF found correct frequency : 500.0325 . Recipie : Hayg 70.

Good storage!

08h18 Start ThomX

10h00 HV is 'ON'

10h35 RF Gun phase is 174 dg. Section Phase is  209 dg. Sect. Att. is 2.70 dB TL/BPM2 X=0, Charge is -127 pC

Linac steerers H [2.66 -4.46], V [-2.00 2.41]

10h40 Start Ring RF 100 kV, TL/BPM2 X=0,5 mm

Ring Studies

12h30 Stop HV and ring RF

12h40 Access: JN went to exchange the shunt resistors

13h26 HV iand ring RF are 'ON'

15h18 RF Gun phasee is 178 dg., Sect. phase is 215 dg.

18h10 Stop ThomX

9h25 Start ThomX

11h20 HV on, linac RF OK, but there is no laser on the cathode. Trying to fix.

The problem was with the M4 position. initial positions now are: M4 mot.01 2855.00,  M4 mot.02 4631.00,

15h25 HV is on.

problems with changing Ring RF frequency. Kevin helped.

With frequency chnge, the trigger stability changes. The rigole phase should be adjusted.

Problem with steerer in the TL TL/PS/STR.03-H.O1 Impossible to set the current. It goes to error.

Looking for solution to compensate its effect. Email to jeabn Noel is sent

Search for non dispersive orbit and frequency. F =500.059 looks good. With RF and without RF orbit is the same.

Further studies ongoing.

End of shift. 1906 

08h23 Start ThomX

09h40 HV is 'On'

10h24 RF Gun Phase 183 dg. Sect. Att. is 2.533, Phase 212 dg. Charges; -100.0 pC, -93.0 pC, -109.0 pC, Linac steerers H [2.68 -4.4], V [-2.0 2.19]

10h35 Loading receipt from 06/12/2024 11h30, Thereis storage at freq. 500.10045 MHz, 100 kV

12h34 RF Gun Phase 181 dg. Sect. Att. is 2.553, Phase 219 dg. Charges; -106.0 pC, -100.0 pC, -112.0 pC, Linac steerers H [2.68 -4.4], V [-2.0 2.19]

Adjusting the vertical orbit to BPM1 and BPM2 (-1 mm and -1.5 mm respectively) reduces the vertical spot size on the MSRV camera

Checking BBA

14h00 Controlled access to the bunker to check the X-line shutter

15h00 HV is 'ON'

17h15 Stop ThomX

08h25 Start ThomX: Modulator, frigo

08h35 Start chilers, laser, cycling all magnets

10h05 HV is 'On'

RF gun phase is 161 dg., Dark current about 25 mV, Att. Sect. is 2.53 dB, phase is 213 dg., Charges: -101 pC, 99. pC, -109 pC

Linac steerers: H [2.63 -4.38], V [-2.03 2.47]

10h20 RF cavity; problem with amplifier: fixed

10h25 Beam injected to the ring without RF, RCDS on the transfer line

10h45 RF is 'On'  150kV, phase -58.5 dg. TL/BPM02 X=0 

10h55 Receipt saved (I dp in ring at 159.3 A)

LOCO

11h38 Jump in Vertical position at TL/BPM01 on +1mm. Storage drops

Change the linac steerer V1 to -2.23 TL/BPM01 Y=-0.5 mm

12h16 Start feedback on the TL/BPM.01 position X=0, Y=-0.5

14h30 Start cycling dipoles and quads of the ring

14h43 The receipt from 10h55 loaded. Storage restored

15h10 ring settings with I dp = 160.4 A loaded (from the receipt of 20250110_11_04)

18h05 Stop ThomX

10h30 Start beam

Since Friday evening the problem to store the beam at 70 MeV. There is 1 turn only. Probably some subsystem failure. At this moment the reason is not found. Help is needed: synchronization/Diag/Magnets.

Today morning the same situation. We came back to 50 MeV and the problem remains.

We checked dipoles with resistors, it looks fine. We are checking synchronization and laser, Diag delays.....

We found the problem is with kicker. looking now at this with Maher. The max value it accepts is 2500 V.

12h20 Maher wil restart the kicker at the hardware level. Maher is contacting SOLEIL.

12h30 The modulator has been set to standby mode.

Investigation of the problem with injection kicker.

Tomorrow tests with SOLEIL people.

16h30 Stop ThomX

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

08h21 Thomx Started: modulator, frig, laser

08h27 Chillers started, cycling all magnets

09h32 HV is 'ON'

09h34 Cannot control the section attenuator

09h50 The issue with the section attenuator was fixed: its server was shut down and restarted, but it was set to 0 dB!!

11h17 RF Gun phase 171 dg., Sect phase is 211 dg. Att. 2.62 dB, TL/BPM2 X=2mm, Charges (from BPMs at Att. 31 dB): -77pC, -77pC, -86pC . Linac steerere: H [1.03 -3.47], V [-1.88 2.63]

Contradictions with ICTs:  -87 pC, -73 pC, -80 pC

Beam in the ring

11h40 RCDS on injection receipt all_20250418_11_39_40, RF cav. at 100 kV, phase 16.5 dg., screanshots

12h03 Linac was reajusted. RF Gun phase is 166 dg., sect. phase is 210 dg. Att. 2.58 dB, TL/BPM2 X=3 mm RF cav. 100 kV, phase 13.5 dg. screenshots

12h10 Ring dipoles were changed from 160.4 A to 159.3 A, ring quads were adjusted and tune as well was set back to 0.17. TL/BPM2 X = 0. Screenshots 

12h25 RF Gun phase was adjusted to 161 dg.

15:24 Initial Synchro delay for streak camera: -6.60us. Injection at delay of +99.3e3us

Measurements incuding single shots

Study of the injection and of long decays with the streak camera, cf images. Horizontal scale is 2ms, vertical scale is 600ps.

Operating the streak camera create instabilities on the ring 500MHz that may cause phase problems.

16h47 RF Gun phase is 149 dg. RF cav. was at  200 kV, phase 10.5 dg.

17h26 Stop thomx

Goals: Optimization of the IP. Verification of the llaser waist position and electron beam angle wrt. collision plane.

08h25 ThomX was started; Modulator, Frig, Laser

09h30 Chillers were started, cycling all magnets

RI-C1/PS/STR.06-H.01 is out of order. Fixed with the health check by killing the device server.

09h58 HV is 'ON'

10h20 RF Gun phase is 162 dg., Linac steerers H [0.52 -2.73], V [-228 2.70], Sect. phase is 211 dg.,  Sect. Att. is 2.55 dB, TL/BPM02 X=0, Charges (BPMs): - 111 pC, -111 pC, -123 pC, -123 pC

Receipt from 04/06/2025 17h11

10h29 Beam transported to the ring

10h30 The ring RF cavity did not start due to interlock on  Pi, Pr, RF. Fixed

11h - 14h Optimization of the ring by using also MRSV. We have arrived @MRSV to the sigma_x = 16.4 pixels and sigma_y = 13.5 pixels.1 pixel = 41 um.

14h Operation with X-rays

We started withthe flux of 50 pA and optimize it till 350 pA (sometimes up to 400 pA). The vertical orbit is attached. The X-ray flux depends strongly on the tuning of the Linac and TL + injection. During the optimization we do not modify the Ring elements. By changing the vertical corrector in the TL, the flux was increased by 100 pA. To be understood.

The injected charge in the ring shows slow oscillations, same as the ICT signals in TL (see screenshots). From time to time the injection/charge starts to jump, sources (similar situation is with FPC laser)

Start of the vertical and horizontal scans. initial pos_Y   = -1.24 mm

With these data we get ANGLE =  5.1 mrad

With the vert orbit Ring BPM we calculated the following:  BPM3 =-2.62 mm pos. 3.93 m and BPM4 = 2.99 mm pos 5.074 m => ANGLE = 4.9 mrad

Very good agreement given the precision of the measurements.

Stability of the injector is very important during these measurements.

We made the quasi flat vertical orbit around IP ANGLE 0.09 mrad. As for now, for this vert. orbit, the flux is 3 times lower ~110-120 pA, despite different scans and attempts to inclrease it. Apparently, vert. orbit in SEXT is very important and in current configuration should be offset.

19h STOP THOMX

Astra simulation of the phase charge scan (see figure) shows that this is a convolution of the electron bunch generated by the laser pulse, since electrons cannot be generated at the negative field at the cathode. Therefore, the zero crossing is a cutting edge. The maximum acceleration corresponds to 48.5 degrees. 

From the phase charge scan (see figures): Sigma1=1/0.462/1.4=1.5 dg. (morning), Sigma2=1/0.337/1.4=2.1 dg. (evening). But it seems that last one has satellite bunch.

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

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)

Goals:

- Work on the BLM to have the signals at the injection and from the arc in the ring.

- Study on the ring injection and beam storage at higher beam charge. Check the linearity.

09h35 Thomx was started: modulator, frig, laser

09h41 Chilers were started, all magnets cycling

10h47 HV is 'ON'

10h57 Hv is 'OFF', Access to the bunker

12h10 HVis 'ON'

RF gun phase was set to 198 dg., sect phase 206 dg., Sect Att. 2.62 dB, Chgarges: -59 pC, -59 pC, -64 pC, laser att.  270

13h13 Unable to get the beam into the ring. Change kickers back.

14h40 HV is 'OFF', Access to the bunker to check/reconnect the BLM

The "Extraction" kicker did not allow to store the beam. Maher exchanged the kicker PS back.

Restart. Ring tuning is OK.

Gradual increase of the charge from the RF gun. Tuning and measurements of the charge in the ring (integral of the TbT sum signal @2k turns). Please, see the plot attached.

We made 4 points. For each one, the solenoid, TL quaqrupoles and steering and injection were changed by looking at the BLM signal (ring injection). Ring kept unchanged.

A special attention should be given to the transport efficiency (and emittance), when increasing the charge.

18h Stop THOMX

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

Goal: Ring BBA

09h14 Unable to start thomx. Need help. Probably problem with cooling water.

12h35 Warm-up the modulator, Chillers started

12h42 Cycling all magnets

12h57 It seems that leds at LI/SST1 and TL/SST1 are ON. . Fix. IHM ==>'Camera Power'==> 'Power 3'

13h42 HV is ON

14h06 Strange situation: the modulator works, but there are no radio frequency signals (see the screenshot).

15h46 Maher fix it. HV is ON

16h16 the modulator works, but there are no radio frequency signals

Need help from Maher to restart the pre-ampli.

16h34 Up to now, the beam was transported only till TL/SST.02. Very often we observed interlock (something happen in the IGLOO ?). After this probably the pre-ampli stopped operating. This is our observation. Moreover, several mistriggers.

For the RF cavity, there is  the problem to set the Voltage. It can be done only manually by Mohamed.

The control of the iris thouth the ELLO com4 does not work. It says "COM4 not available".

Shift program even has not started.

16h54 STOP

8h37 Warm-up ThomX: Modulator, Laser, Fridge

8h44 Chillers were started, cycling all magnets.

9h49 HV is ON

9h59 Can not see beam charge and cameras

10h37 Cameras are OK, ISTs are not.

10h38 Beam is in the ring at 50 MeV, all seems OK. Transition to 40 MeV

10h52 receipt from recipe_recipe_LI_TL_RI_all_20251209_17_54_51.txt

RF Gun phase  241 dg., Sect. phase 200 dg. Sect. Att. 3.82 dB, Linac steerers: H [0.87 -3.27], V [-3.0 3.63], Charges (BPMs):  -111, -107, -107, -104, 98 pC

11h03 Beam is in the ring

Orbit correction. Optimization of the beam. The beam size at MRSV is about ~25 pixels.

The orbit is correction with a reasonable beam storage. (see the screenshot).

A short run wiht the X-rays thanks to Ronic.

The beam is very unstable. To minimize the syncrotron oscilations it is often neseccary to adjust RF cavity phase, sect. Att. value end section phase

14h15 HV on standby

16h18 HV is ON

17h10 Stop ThomX

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

8h45 Chillers were started, cycling all magnets.

10h10 HV is ON

10h14 Going to 70 MeV

10h44 Beam is in the ring W/O RF, 70 MeV

Manual ring shifter set to 6124 RF 50 kV

11h56 Ring RF set to 100 kV RF phase 17.5 dg.

13h34 Good receipt  recipe_recipe_LI_TL_RI_good_20251212_13_56_38.txt copied to references as 70_MeV_Vert_tune 0.66_good_20251212_13_56_38.txt

Rf gun phase 239 dg., Sect. Att. 0.18 dB, Phase 243 dg., TL/BPM2 X=-1mm,  linac correctors H [1.0 -3.32], V [-2.02 2.10], Charges: -85, -81, -82, 84, -82 pA, Laser Att.  281.

MRSV fills the all slit. Storage up to 100%

14h10 ==> 50 MeV Manual phase shifter value set to 4876. Sect. temperatute set to 30C (clarinette, consigne = 29.2C).

14h39 Beam is in the ring.

14h40 HV on standby, Cycling all magnets.

15h08 HV is ON Receipt: recipe_recipe_LI_TL_RI_good_20251125_16_42_01.txt. Copied to references: 50_MeV_good_tune_0.17_0.7_20251212_16_03_54.txt

MRSV size at 50 MeV down to 23 pix.

Studies Model_real Machine for the ring. Data to be analyzed.

17h07 Stop ThomX

Start from 10 dB 

decrease up to 1 dB : Vacuum is OK decrease up to 10�8 mBar

11h10 : att.sec 0.7 dB ==> vide in section 1.1 10-8 mbar & vide out section 8 10-9 mbar 
yesterday : att.sec 0.7 dB (Pis = 21 MW) ==> vide in section  1.1 10-8 mbar & vide out section 1.1 10-8 mbar

11h15 : att.sec 0.6 dB ==> vide in section 1.0 10-8 mbar & vide out section 1 10-8 mbar 
yesterday : att.sec 0.6 dB (Pis = 21.5 MW) ==> vide in section  1.2 10-8 mbar & vide out section 1.3 10-8 mbar

11h22 : att.sec 0.5 dB ==> vide in section 1.0 10-8 mbar & vide out section 1 0-8 mbar 
yesterday : in section à 1.1 10-8 mbar & vide out section 1.4 10-8 mbar

11h30 : att.sec 0.4 dB ==> vide in section 1.0 10-8 mbar & vide out section 1 1-8 mbar 
yesterday : in section à 1 10-8 mbar & vide out section 1.4 10-8 mbar

11h38 : att.sec 0.3 dB ==> vide in section 1.0 10-8 mbar & vide out section 1 1-8 mbar 
yesterday : in section à 1 10-8 mbar & vide out section 1.4 10-8 mbar 

11h39 : Interlock section V4 jump

11h40 :Back to 0.4 dB

11h46 :Back to 0.3 dB : vacuum V4, V5 < 10^-8 mBar, V4 decrease 

12h07 : Interlock machine with V4 jump

12h08 :Back to 0.4 dB

12h15 : Interlock machine 
12h22 : Interlock machine
​12h25 : Interlock machine
12h28 :Back to 3.4 dB

​12h28 : Interlock machine
​12h28 : Start with lower voltage HT : 1205 V, Att 0.4 dB
12h32 :Back to 0.1 dB, HT 1205​
12h42 : Interlock machine, V5 increase
​12h58 : Interlock section no vacuum increase
​13h10 : restart after 10 minutes to relax  the machine 
​13h18 : HT --> 1208 
​13h20 : Interlock section no vacuum increase
 

​13h30 : Att back to 3dB and decrease slowly : 0.9 dB now

​13h38 : Att 0.8 dB

13h44 : Att 0.7 dB ==> vide in section 9.9 10-9 mbar & vide out section 1.1 0-8 mbar 

14h : Att 0.6 dB ==> vide in section 9.9 10-8 mbar & vide out section 1.2 0-8 mbar 

14h15 : Att 0.5 dB ==> vide in section 9.2 10-8 mbar & vide out section 1.2 0-8 mbar 

14h30 : Att 0.4 dB ==> vide in section  10-8 mbar & vide out section 1.2 0-8 mbar 

14h34 : Att 0.3 dB

14h42 : Att 0.2 dB vide in section 8e-9 vide out section 1.1 e-8

Interlock 14h43 mais pas de réfléchi => passsage en mode persistence sur l'oscillo pour vérifier qu'il n'y a pas du tout de réfléchi

14h53 => on est revenu a Att. 0.2 dB => in section 8e-9 vide out section 1.1 e-8

15h00 => on est passé à  Att. 0.1 dB => interlock encore mais on ne voit pas de réfléchi !
               relance immédiate à Att. 0.1 dB => in section 7e-9 vide out section 9e-9

15h22 : att.sec 10 dB apres interlock reseau

15h23 : interlock sans reflechi visible sur oscillo

15h25 : interlock reseau

15h26 : att sec 10dB  ==> vide in section 2.6 10-9 mbar & vide out section 8 10-9 mbar 

15h29 passage à 15dB

15h32 : att sec 14 dB  ==> vide in section 1.5 10-9 mbar & vide out section 2.4 10-9 mbar 

15h33 : interlock reseau

15h35 : att sec

15h37 interface rf conditionning ne marche plus pour bouger attenuateur, rechargement de l'interface, semble ok maintenant

15h38 : att.sec  20 dB ==> vide in section 1.4 10-9 mbar & vide out section 2.3 10-9 mbar 

15h40 : att sec 20 dB interlock sans réfléchi visible sur oscillo

15h40 relance à 20 dB

15h44 interlock sans reflechi klystron

15h45 : relance à 20dB

15h46 : interlock reseau

15h47 Pause de 10 minutes

16h00 reprise avec att sec 10dB ==> vide in section 2.7 10-9 mbar & vide out section 2.1 10-9 mbar 

16h06 att sec 9dB ==> vide in section 2.9 10-9 mbar & vide out section 2 10-9 mbar

16h10 att sec 8dB ==> vide in section 3.3 10-9 mbar & vide out section 2 10-9 mbar

16h14 att sec 7dB ==> vide in section ? 10-9 mbar & vide out section ? 10-9 mbar

16h14 interlock

16h15 reprise att sec 7dB ==> vide in section 3.5 10-9 mbar & vide out section 2 10-9 mbar

16h22 att sec 6dB ==> vide in section 3.9 10-9 mbar & vide out section 1.9 10-9 mbar

16h27 att sec 5dB ==> vide in section 4.3 10-9 mbar & vide out section 1.9 10-9 mbar

16h31 att sec 4dB ==> vide in section 4.5 10-9 mbar & vide out section 1.9 10-9 mbar

16h35 att sec 3dB ==> vide in section 4.9 10-9 mbar & vide out section 2 10-9 mbar

16h39 att sec 2dB ==> vide in section 4.9 10-9 mbar & vide out section 2 10-9 mbar

16h43 att sec 1dB ==> vide in section 7.5 10-9 mbar & vide out section 2.8 10-9 mbar

16h47 att sec 0.9 dB ==> vide in section 8.7 10-9 mbar & vide out section 4.3 10-9 mbar

16h51 att sec 0.8 dB ==> vide in section 9.3 10-9 mbar & vide out section 6.4 10-9 mbar

16h55 att sec 0.7 dB ==> vide in section 9.5 10-9 mbar & vide out section 7.7 10-9 mbar

16h59 att sec 0.6 dB

17h interlock reseau

17h01 att sec 0.6 dB ==> vide in section 9.2 10-9 mbar & vide out section 8.7 10-9 mbar

17h05 att sec 0.5 dB ==> vide in section 9 10-9 mbar & vide out section 9 10-9 mbar

17h10 att sec 0.4 dB ==> vide in section 8.4 10-9 mbar & vide out section 1 10-8 mbar

17h42 interlock 0.4dB sans observation reflechi klystron

17h44 att sec 0.4 dB

17h46 att sec 0.3 dB ==> vide in section 7.8 10-9 mbar & vide out section 1 10-8 mbar

18h09 att sec 0.2 dB ==> interlock reflechi section

18h10 Fin de shift

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

08h28 Start Thomx: Modulator, Laser, Frig

08h33 Chillers were started, cycling al magnets

9h00 MPS affichage: Arret d'urgence... Appel Nourredine, probleme resolu.

9h30 Laser aligned on streak camera

Fix technical issues.

11:00 First measurements with streak camera

13:00 Viktor repotimizes the linac.

New measurements.

Measured length 9.2ps, including ~1ps due to spot size.

Shot to shot jitter ~2.9ps (over 100 shots).

16h10 Vacuum interlocks V1

New measurments, the phase has drifted. Bunch is longer.

17h00 Stop ThomX