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

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 

Mesures : Spectres et taille source X + Quads scans associées, @

** Sol 230 100pC 

** Sol 242 100pC

** Sol 250 100pC (pas de mesure, car flux ~ 3000, pas de centre vertical du faisceau sur Dectris)

** Sol 230 200 pC

18h40 Fin 
 

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 

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.

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

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

*** Programme *** : 
          - Check spectres OnAxis, V+25 et V+40 apres resistances dipole installe hier soir    (pas fait)
          - Alignement et 1ere prise d'image TRANSFOCATEUR sur orbite de référence              (fait)

8h30 : on charge la recette "all_20260224_14_54_20"

Flux tres bas (3000-4000)

Adjustement chroma ==> Recette 20260224_15_49_43_adjust_chroma

     Flux toujours tres bas :      3000-4000 ph/s
     Taille verticale scan FPC   230um RMS
     Streak :                              240 ps

     On ne peut pas demarrer le shift

16h16 Several recipes were saved with adjusted settings for the linac and ring orbit. Flux I3+I4 riched of 20000 pA, but they became unusable after a few minutes due to instability.

17h36 Receipt recipe_recipe_LI_TL_RI_all_20260225_17_33_57.txt saved with comment: 20260225_for_transfocator_align
Recipe saved in References recipes : Transfocator_20260225_17_33_57.txt
Alignement transfocateur et Prise d'image - Racks in/out

----------------------------------------------------------

Code redpit phase laser a change
il reste a redemarrer la carte

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

*** Programme ***

- repartir de la recette "iniale" de jeudi avec un grand angle vertical à l'IP

- trouver le point de "bascule" horizontal de l'IP avec la CFP (point immobile en fonction de la phase CFP)

- Changer l'angle vertical pour trouver le minimum acceptable pour les spectres (par dicotomie)

08h36 HV is on

09h30 recipe_recipe_LI_TL_RI_all_20260218_12_34_02.txt loaded. RF Gun phase 42 dg., Sect. att. 2.57 dB, phase 213 dg. Linac steerers: H [-0.09 -2.76], V [-2.39 3.23], Charges (ICT) about -100 pC, BPMs - about -100 pC. RF cavity phase -33 dg.

09h50 Ramp to 280 kV

Laser phase appears unstable

10:34 AM Vertical orbit bump applied

13h41 RF cavity ramp down to 150 kV

18h00 Standby

The additional shunt resistor installed on third DP.

19h27 HV is on

19h40 Standby

The additional shunt resistor installed on sixth DP.

20h00 HV is on

20h20 Standby

The additional shunt resistor was removed on sixth DP.

20h52 HV is on

21h30 RF gun phase 87 dg. Sect. att. 2.442 dB, Sect. phase 222 dg. Charges (BPMs): around -110 pC, unstable.   Linac steerers: H [-0.19 -2.67], V [-2.43 3.30], RF cav. 150 kV, -33 dg.

22h30 Dispersion measurement

22h50 Beta functin  measurement

Data save in filename /tmp_mnt/data/iryna.chaikovska/mml/measdata/THOMX/StorageRingdata/QUAD/QuadBeta_2026-02-24_22-44-21.mat 
Tunes before mesurement nux = 0.1692 nuz = 0.7226 
Tunes after  mesurement nux = 0.1676 nuz = 0.7265 
maximum betabeat dbxobx = 32.7 % dbzobz =  6.8 % 
rms betabeat bx = 12.3 % rms bz =  2.9 % rms 

Frequency scan from 500.078 MHz to 500.124450 MHz

02h16 ThomX was stopped

9h40: mise en chauffe (chillers/frigo, modulateur, cyclage)

HV ON

The ICT signal (GUN) is frozen. Need help to restart it. Use the BPM SpSum instead.

13h Beam in the ring.

RF gun phase 31 dg., Sect. att. 2.47 dB, Sect. phase 237 dg., charges (ICT): about -120 pC

17h16 ThomX stopped

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

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

08h55 HV is ON

09h29 Beam is in the ring W/O RF. the receipt loaded:  recipe_recipe_LI_TL_RI_all_20260218_12_34_02.txt (big bump verticaly around IP)

09h30 RF 50 kV, cavity is tuning (to far)

09h41 RF ==> 100 kV. RF Gun phase 21 dg., Sect. att. 2.36 dB, secr. phase 216 dg.  Charges: (ICT) about -100 pC, (BPMs): -115, -110, -134, -115 pC, Linac steerers: H [-0.16 -2.76 0], V [-2.35 3.31 0]

RF ==> 150 kV, ==> 280 kV

09h59 the receipt loaded: recipe_recipe_LI_TL_RI_all_20260218_10_18_05.txt (with small angles around IP)

12h50 receipt loaded: recipe_recipe_LI_TL_RI_all_20260217_09_44_16.txt

16h01 recipe_recipe_LI_TL_RI_all_20260218_12_34_02.txt loaded (see screenshot)

17h25 Stop ThomX

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

8h40 HV ON

10h20 recipe_recipe_LI_TL_RI_all_20260218_10_18_05.txt saved ,

15h15 Li/ps/str03-V steers the beam verticaly "-" UP, "+" Down. Li/ps/str03-H steers the beam horizontaly, "+" <==, "-" ==>
16h44 Laser new position : [5.112, 4.423]

Align QP-Linac
Quad scans : depends on camera settings ...

Matching from calculated twiss in attached file.  

19:10 : End

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

Le cyclage de RI-C1/QP.08, RI-C1/QP.11 et RI-C2/QP.03 ne démarre pas tout seul (action nécessaire sur le boutton cyclage de l'élément).

Programme - Etude "IP dromadaire" ==> Scan pos horizontale FPC + phase 

Positions FENTES2/HEXA des 2 derniers shifts :
    Pos FENTE2 :    [H , V]  = [-3 , -10.20]
    Pos HEXA ech : [Tx , Ty] = [+79 , +31]

10h00 Beam is in the ring W/O RF, -120 pC, receipt saved: recipe_recipe_LI_TL_RI_all_20260217_09_44_16.txt on the base of reference for 50 MeV

recipe_recipe_LI_TL_straight_all_20260217_10_08_07.txt for the linac and the TL stright part

RF 100 kV phase -48.5 dg.

10h35 Standby, Changing the FPC controller

11h23 HV is on

11h40 RCDSon injection

11h59 RF gun phase 23 dg., Sect. Att. 2.39 dB, Phase 230 dg., Charges: (ICT) from -120 to 140 pc, (BPMs) -137, -137, 137, 137 pC

tunes: H 0.166, V 0.71

12h26 tunes: H 0.167, V 0.72. MRSV size is very sensetive to injection settings

At around 2:45 p.m., the power to the ring dipole went out.

16h42 RF 280 kV, phase -50 dg. Streak camera measurements for 100 kV and 280 kV

Orbit bump to change orbit tilt around IP

18h59 Stop ThomX

The code for laser alignment does not work properly --> done by hand 
H 5.244
V 4.654

phiMax section = 224 

position change (yag screen in pixels)  vs delta phase 

Sole 230: 

Eps X: 

  emit_norm  : 1.3682 mm.mrad
  beta       : 19.51 m
  alpha      : -6.673

Eps Y: 

emit_norm  : 1.7366 mm.mrad
  beta       : 10.60 m
  alpha      : -3.606
 

Scan_QP0118h01.mat : 230

Scan_QP0118h09.mat : 240

Scan_QP0118h22.mat : 235

Scan_QP0118h26.mat : 225 

Scan_QP0118h31.mat : 235 : 

Scan_QP0118h31.mat : 235 : gain 0 

Scan_QP0118h36.mat : 240  : Gain 0 

18:40 stop

09h12 Warm-up ThomX: Modulator, Laser, Fridge

09h21 Chillers were started, cycling all magnets.

RF 50 pps

1210 --> interlock 
1150 : ok 

Vacc : vac4 dominates (section) 

Q_max (420) = 700 pC !

Alignement cathode à vérifier : 
position [X ; Y] : [5.33822878121 ; 4.32296059091]
pente [X ; Y] : [685.183030303 ; 1644.7430303]
error [X ; Y] : [1197.22874693 ; 11425.5175959]

13h38 Standby

14h09 Steereing coils along the section were installed, HV is on, the laser gate was closed

14h10 Sect Att. 30 dB, RF gun Att. 20 dB, HV 1160 ==>1215 V

14h13 All seems OK, Sect. Att. 20 dB 

14h15 Sect. Att. 10 dB 

14h18 Att. 5 dB 

14h20 Att. 3 dB  

14h22 Att. 2.44 dB 

14h24 interlock, sect. vacuum jumps, restarted

14h30 RF Gun Att. 15 dB. Gun vacuum drops

14h32 Gun Att. 10 dB.

14h34 Interlock, unknown reasone, restarted

14h36 Interlock, unknown reasone, restarted

14h41 RF Gun Att. 8 dB.

14h46 RF Gun Att. 7 dB.

14h50 RF Gun Att. 6 dB.

14h53 RF Gun Att. 5 dB. (Gun vac01 1e-8)

14h55 RF Gun Att. 4 dB.

15h01 RF Gun Att. 3 dB.

15h05 Interlock, restarted (not a vacuum problem)

15h06 RF Gun Att. 2 dB.

15h10 RF Gun Att. 1 dB, Sect Att. 1.44 dB

15h11 Interlock, sect. Vacuum (Vac05), Sect Att. 2 dB 

15h15 Interlock, sect. Vacuum

15h20 RF Gun Att. 0.8 dB, Sect Att. 2.04 dB

15h22 Interlock, sect. Vacuum (Vac05)

15h24 RF Gun Att. 0.7 dB, Sect Att. 2.04 dB

15h27 RF Gun Att. 0.6 dB, Sect Att. 2.04 dB

15h32 RF Gun Att. 0.5 dB, Sect Att. 2.04 dB

15h34 RF Gun Att. 0.4 dB, Sect Att. 2.04 dB

15h36 Interlock, sect. Vacuum (Vac05)

15h37 RF Gun Att. 0.3 dB, Sect Att. 2.04 dB

15h39 RF Gun Att. 0.2 dB, Sect Att. 2.04 dB

15h42 RF Gun Att. 0.1 dB, Sect Att. 2.04 dB (gun breakdowns)

15h53 RF Gun Att. 0.0 dB, Sect Att. 2.04 dB (gun breakdowns)

16h00 HV off. 12.5 pps 

16h01 HV on

16h07 Gate open, Laser Att. 233, -100 pC, RF Gun phase 103 dg.

16h35 RF Gun phase 103 dg., Sect. phase 221 dg., Sect. Att. 2.36 dB -100 pC. Linac steerers to align QP1 - QP3 H [-0.22 -2.82], V [-2.52 3.15]. Li/BPM01 x=1.8, y =0, but not on the screen

from the code : QP1 - QP3 H [-0.23 -2.82], V [-2.53 3.16].

Charge is oscillating, do not see the reason. 

rechecked the laser alignment : it's seems to be within the variations of the beam position. Cannot do better. 

Remark concerning the timing ... 25 min more on the trend data (tango, libera side ? ) : see the trend file for the positions. 

H : 5.256
V : 4.643

QP1 scan to check the working point. 

18h30 Stop 

Mesures après remontage de la cale : 1215 V sur le modulateur. ça tient mais encore des claquages dans le Canon à 0dB. Il faut faire travailler encore un peu demain. 

la suite demain

08h25 Warm-up ThomX: Modulator, Laser, Fridge

08h33 Chillers were started, cycling all magnets.

09h31 HV is on. Vacuum: Li/Vac1 4e-9, Li/Vac2 3e-9, Li/Vac3 3e-9, Li/Vac4 1e-9

09h33 Sect. Att. 30 dB, RF Gun Att. 20 dB, HV 1030 V Interlock

09h39 Sect. Att. 30 dB, RF Gun Att. 20 dB, HV 1050 V Interlock. Something wrong

10h20 HV 1050 V. Maher is here. Interlock by reflected power to the klystron.

10h26 Modulator is on standby.

10h29 HV is on W/O RF. HV 1215 V. All is OK.

10h34 Modulator is on standby.

10h57 HV is on, 1030 V

11h09 HV is  1050 V

11h35 50pps, 1030V

11h42 1040 V interlock

11h45 Modulator is on standby.

16h10 Stop ThomX

** l'iris a été changée et est opérationnelle

/!\ problème dans l'offset il faut ajouter 0.5mm à la valeur relu par Tango (pour 1.3mm il faut mettre 0.8 mm dans l'ATK panel)

** Laser PC ***

- Sortie Laser: 85 - 90 uJ (avant 250 uJ)

- Injectée ligne transport: 80 uJ (235 uJ)

- Sortie ligne transport: faisceau trop gros pour une mesure correct (188 uJ)

- Sortie Iris (ouverture max): 65 uJ (175 uJ)

- Sortie iris (1.3mm): 28uJ (51 uJ)

- injectée canon (iris 1.3 mm, 420 pas) : 22 uJ (43 uJ)

On a environ 2 fois moins de puissance laser disponible pour les e-, les 100pC devrait etre atteignable

/!\ refaire un alignement cathode ! le point à bougé (ouverture canon, réalignement laser).

*** Synchro ***

non testée pour le feedback de phase. 

16h00 HV is on

Section and RF gun processing

17h05 HV 990  V, RF gun att. 0 dB, interlocks

It seems that the brakdowns are in the waveguides, not in the RF gun.

17h31 HV 1010 V, Sect Att. 22 dB, RF gun Att. 10 dB

17h34 HV 1030 V, Sect Att. 22 dB, RF gun Att. 10 dB, interlocks

17h45 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

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