HOME Prise de donnees MML Controle commande Simulations Notes Hardware Ligne X Laser Interaction Diagnostiques Synchronisation
Commissionning Commissionning Preparation Pannes ShiftCheck
  Toutes les notes concernant les Commissionning de ThomX, Page 3 of 61  Not logged in ThomX    logo
ID Date Author Status Type Category Important Subject Icon
  1191   Wed Feb 11 09:12:35 2026 VM && HGUnder ProcessShift summaryLI Linac commissioning  

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

09h21 Chillers were started, cycling all magnets.

RF 50 pps

1210 --> interlock 
1150 : ok 

enlightenedVacc : 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 

  1190   Tue Feb 10 18:34:33 2026 Entered by Super Team from 127.0.0.1 on Tue Feb 10 18:34:13 2026Under ProcessShift summaryLI | RF D1 Demarrage Linac icon1.gif 

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

 

 
 

  1189   Fri Feb 6 08:26:41 2026 Entered by Super Team from 127.0.0.1 on Fri Feb 6 08:26:22 2026Under ProcessShift summaryRF D1   

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

 

  1188   Thu Feb 5 13:18:03 2026 KD, HG, VMFixedInfoLI | TL | LE | Ring | CC | Laser | Opt | MECA | SY | Vide | Electronique Laser PC status 

** 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

  1187   Fri Jan 23 07:42:45 2026 IC, VMUnder ProcessShift summaryLaser Ring studies 

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

 

 

  1186   Thu Jan 22 07:37:58 2026 IC, VMUnder ProcessShift summaryLinac Commissionning | Ring Commissioning Beam studies 

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

  1185   Wed Jan 21 07:56:59 2026 KD MJ RC DNUnder ProcessShift summaryLI | TL | LE | Ring | Linac Commissionning | Ring Commissioning Position Horiz FPC ("spectres dromadaires") 

7h55: mise en chauffe en remote (modulateur, cyclage, laser, frigo/chillers)
==> plus de trig sur la machine (sur toute la plage de scan de la phase stab du laser PC). ==> OK, je suis une truffe le laser était "off"

**** Programme ****

- mesures RP
- test de différentes position IP pour remédier aux spectres en "dromadaires"

===============================================================

11h X_fpc = -1.8 mm

** Spectres 

centre  [H , V] = [-8.5 , -13.5] 
V+25  [H , V] = [-8.5 , +11.5]

** Mesure taille de source fente1

11h50 X_fpc = 0 mm (faisceau en bord de tube (coupe par le tube meme)

** Spectres 

centre [H , V] = [+62 , -13] 
V+25  [H , V] = [+62 , +12]
H-25  [H , V] = [+37 , -13]

12h30 X_fpc = -0.9 mm

** Spectres 

centre [H , V] = [+25 , -13] 
V+25 [H , V] = [+25, +12]

Plus de phase plus d’electron – 13h22 retour faisceau

H-25 [H , V] = [0 , -13]

Plus de phase – plus d’e- - 13h47 retour faisceau

V+25 [H , V] = [+25 , +12]
Centre [H , V] = [+25 , -13]
H-25 [H , V] = [0 , -13]
H+25 [H , V] = [50 , -13]
V-25 [H , V] = [0+25, -38]

14h30 Retour a X_fpc = -1.8 mm (pour aller a det +/-40 mm)

** Spectres 

centre [H , V] = [-7 , -13] 
V+25 [H , V] = [-7 , +12] 
H+25 [H , V] = [+18, -13] 
H-25 [H , V] = [-32 , -13] 
V-25 [H , V] = [-7 , -38]
V-40  [H , V] = [-7 , -53] (droma)
V-40 [H , V] = [-7 , -53]  avec orbite e- differente  (droma)

15h40 Retour a X_fpc = -0.9

** Spectres 

centre [H , V] = [+25, -13]
V+40   [H , V] = [+25, +27]      anneau “pas bon” (drom)
V+40   [H , V] = [+25, +27]      anneau “reajuste” (un peu drom)

** Mesure taille source fente 1

** Spectres

H+40  [H , V] = [+65, -13]
V-40   [H , V] = [+25, -53]
V-40   [H , V] = [+25, -53] avec cavite RF 200 kV

16h45 X_fpc = - 0.6

** Spectre

centre [H , V] = [+40, -13]
H-40 à [H , V] = [0, -13]
V-40 à [H , V] = [40, -53]
V+40 à [H , V] = [40, +27]
H+30 à [H , V] = [70, -13] (on ne peut pas aller a +40)

** Quelques autres spectres pris

** Mesure taille source fente 1

 

  Draft   Tue Jan 20 08:35:56 2026 VM, ND, VCUnder ProcessShift summary    

08h35 Warm-up ThomX: Modulator, Laser, Fridge
08h41 Chillers were started, cycling all magnets.

09h40 HV is ON

10h12 The receipt loaded: recipe_recipe_LI_TL_RI_all_20260116_14_22_26.txt. Beam is in the ring W/O RF

RF gun phase 40 dg., Sect. Att. 2.556 dB, Sect. phase 207 dg., Linac steerers: H [0.58 -2.83], V [-2.48 2.94],  charges (BPMs):  -125, -119, -121, -122, -119 PC, the laser att.  359

10h38 RF 100 kV, phase -4 dg., manual phase shifter was adjusted.

10h54 RI_C1 Quads were stoped to chec dispersion at injection

13h00 Triggers stoped, after that was fixed the laser phase jumped to 202 dg. sect. phase 206 dg. 

15h39 Mod. standby

17h20 HV is on

18h01 Stop ThomX

  Draft   Fri Jan 16 08:29:33 2026 IC, VM, NDUnder ProcessShift summary    

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 angry, 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.angry

18h20 We've lost laser synchronization.

18h21 Stop ThomX

 

  Draft   Thu Jan 15 09:09:37 2026 ICUnder ProcessShift summary  Ring studies 

08h56 Warm-up ThomX: Modulator, Laser, Fridge
Chillers were started, cycling all magnets.
Low SF6 pressure.

10h20 HV ON

Tuning of the Linac. Charge at ICT1 is about 100 pC

Load the nominal receipt.

Modulator put to stand by. Lunch break.

13h16 HV ON

Application of the quadrupol calibration curve -12..12 A.

NEW

K1i_model =

   -1.5941
   -1.5941
   -1.5941
   -1.5941


K2i_model =

    3.2615
    3.2615
    3.2615
    3.2615


K3i_model =

   -6.1107
   -6.1107
   -6.1107
   -6.1107


K4i_model =

    5.4292
    5.4292
    5.4292
    5.4292


K5i_model =

   -3.5901
   -3.5901
   -3.5901
   -3.5901


K6i_model =

    2.3630
    2.3630
    2.3630
    2.3630

>> 
OLD
K1i_model =

   -1.5473
   -1.5473
   -1.5473
   -1.5473


K2i_model =

    3.1987
    3.1987
    3.1987
    3.1987


K3i_model =

   -6.0302
   -6.0302
   -6.0302
   -6.0302


K4i_model =

    5.3524
    5.3524
    5.3524
    5.3524


K5i_model =

   -3.5248
   -3.5248
   -3.5248
   -3.5248


K6i_model =

    2.3082
    2.3082
    2.3082
    2.3082

Machine-Model studies.

Nominal receipt

Before LOCO
=== dQ/dx comparison (axis: delta (dk*steps)) ===
Family    dQx/dx(M)      dQx/dx(T)      ratio     dQy/dx(M)      dQy/dx(T)      ratio
QP1     +4.975e-01  +5.370e-01   0.927   -3.362e-01  -4.067e-01   0.826
QP2     +7.289e-01  +8.119e-01   0.898   -2.407e-01  -2.830e-01   0.851
QP3     +2.198e-01  +2.420e-01   0.908   -9.850e-01  -6.102e-01   1.614
QP4     +1.026e+00  +1.136e+00   0.903   -2.736e-01  -2.968e-01   0.922
QP31    +6.600e-02  +7.543e-02   0.875   -2.357e+00  -1.288e+00   1.830
QP41    +5.350e-01  +6.000e-01   0.892   -1.024e+00  -5.563e-01   1.841

LOCO studies.

Checked that the first turn on which we inject now is 13-14th.

18h20 STOP THOMX

 

 

  Draft   Wed Jan 14 08:38:33 2026 VM, RC, MJ, ICUnder ProcessShift summaryLI | TL | LE | Ring Test Soleno=245, optic issue de la simu Julien Matching 

08h36 Warm-up ThomX: Modulator, Laser, Fridge
8h41 Chillers were started, cycling all magnets.
09h40  HV is ON

** 10h38 recipe_recipe_LI_TL_RI_all_Sol245_20260113_17_50_09.txt loaded, RCDS on injection11h23 

RF 100 kV, Phase -4 dg. Manual 1179. RF gun phase 168 dg., Sect Att. 2.53 dg., Phase 214 dg., Charges (BPMs): -185, -177, -182, -181 pC, Linac steerers H [0.75 -2.95], V [-2.64 3.14] ,
MRSV FWHM about 50, sigma down to 22 pix
Acquisition d'un SPECTRE "on-axis a l'oeil" (Hm3_Vm10p2)  - "Nominal ring QUADs"

** 11h36 Set charge to 100 pC, Laser Att. 329,  RF gun phase ==> 171 dg.

- Acquisition d'un SPECTRE "on-axis a l'oeil" (Hm3_Vm10p2) - "Nominal ring QUADs"
- Scan vertical FPC (~11h50)
- Mesure Taille source fente 1 (images wiite beam + image fente source)

** 12h21 recipe_recipe_LI_TL_RI_all_20260109_14_44_42.txt loaded, then receipts for the linac and the transfer line recipe_recipe_TL_all_20260114_12_20_00.txtrecipe_recipe_LI_TL_straight_all_20260114_12_19_54.txt

RCDS on injection. Sometimes MRSV FWHM ==>40 and less. 
- 13h51 : Acquisition d'un SPECTRE "on-axis a l'oeil" (Hm3_Vm10p2)  - "NOT nominal ring QUADs"
- 14h : Scan FPC

** 14h55 : Discussion Marie/Iryna/Viktor ==>  Retour a la recette "nominal ring QUADs" (recipe_recipe_LI_TL_RI_all_Sol245_20260113_17_50_09.txt)
PUIS, a 15h10 : recipe_recipe_LI_TL_RI_all_20260114_12_31_30.txt reloaded  ....  Pourquoi ? je ne sais pas ... Je ne l'ai su qu'a 16h30, donc :

  • Tous les spectres_vs_position_CdTe mesures ensuite (necessaires pour retrouver la divergence e-) sont acquis en fait avec "NOT nominal ring QUADs" au lieu de  de la recette SOL_245 isuue de la simu Julien (recipe_recipe_LI_TL_RI_all_Sol245_20260113_17_50_09.txt)
  • Mesure Taille source fente 1 (15h14-15h18)

** 17h30 : recherche de la cause "spectres dromadaires"

  • Visualisation de tout le tube ==> rien dans le trajet du faisceau
  • Spectre en desynchro toute fentes ouvertes : meme effet dromadaire
  • Mouvements HORIZONTAUX de la cavite FP et/ou Phase : Variations claires de la forme du dromadaire (spectres pris pour pos Horiz FPC -1.8, -1.3 -2.3 mm)  ==> Effet dromadaire sans doute lie au faisceau d'e- qui est courbe entre les 2 dipoles (==> 2 interactions ?) . Effet a quantifier/simuler, puis, si ca se confirme, il faudra trouver une solution pour que l'IP soit absolument sur la tangeante de la courbure des e-

18h05 Stop ThomX

 

  1180   Tue Jan 13 07:58:50 2026 KDUnder ProcessShift summaryLinac Commissionning | Ring Commissioning shift du 13 janvier 2026 

7h55 : mise en chauffe en remote (chiller/frigo, laser, modulateur, cyclage)

9h : démarrage, pas de soucis au niveau du trig

16h30 : demarrage anneau pour recette 230A

les phases ont changées :

dephaseur manuel: 1182 pour 50MeV

prise de donnée à 230A (taille faisceau + spectre)

  1179   Mon Jan 12 13:51:05 2026 HaygUnder ProcessInfoLI | TL Monday Shift : Q-scan + Data (Active Learning) icon1.gif 

Mesures du jour : 

  • Quad scans à QP1 pour voir d'autres points de fonctionnement avec une matcihing anneau correct (Figure de merite <1 ?)
    • autres points Solé
    • autres points Q > 100pC (jusqu'à 300pC)  
  • Active learning pour données TL jusqu'à TLSST3 inclus.  

Attenuation laser : 320 pour pour avoir 100 pC @ Emax

Alignement Quads + minimisation disp E ok 
no 14h40 : Laser s'est arreté ... le Ds s'est mis en fault --> soucis de liquide de refroidissement
--> intervention de kevin 

crying 18h04: plus de trig (Synchro? ) --> trigger ne clignotte plus 

18h20 : Stop ThomX

 

 

  1178   Fri Jan 9 08:05:32 2026 KD, IC, VM, RCUnder ProcessShift summaryRF D1 | Linac Commissionning | Ring Commissioning shift du 9 janvier 2026 

8h05: mise en chauffe en remote (modulateur, frigo/chillers, laser, cyclage)

09h06 HV is ON

10h10 receipt recipe_recipe_LI_TL_RI_all_20260108_17_34_30.txt (242 A BMAD). RF gun phase 226 dg. Sect Att. 2.457 dB, sect. phase 214 dg. Laser att. 319 Charges: -127, -122, -127, -124 pC 

RF 100 kV, phase -7.5 dg, manual phase shifter 4497. TL/BPM02 x=-3 mm 

10h20 after the PSS interloc the modulator is running, but there is no any RF 

10h35 Kevin fixed it. HV is on 

11h37 receipt recipe_recipe_LI_TL_RI_all_20260107_17_19_00.txt loaded for Sol. 238 A BMAD

RCDS on injection receipt saved recipe_recipe_LI_TL_RI_all_20260109_11_52_26.txt

13h 41 Go to 242 A to measure the spectrum

The beam blow up is visible.

Optimization of the ring to find anther working point Tunes  0.145/0.7. The beam storage seems more stable, small MRSV 15/21 pixels New receipt: recipe_recipe_LI_TL_RI_all_20260109_14_44_42.txt

15h14 change to npminam point Isol = 230 A Optimization of the injection. MRSV 15/22 pixels

Measurement of the spectrum

15h40 optimization of the injector

Good storage and MRSV beam size is restored. X- ray flux is about 20 kpA

At every point the streak camera data is saved.

Taking the spectra

 

*** Results (all files in data shared, streak, PhotonicScience, spectrum) ***

An error was made during the source size measurement of the usual working point (230A), no beam size available for that recipe (from previous measurement e- [H,V] = [180, 120], to be confirmed)

--- Bunch length (cf. curve)

The preliminary analysis show that the bunch length seems to not be affected by the recipe used. The 230A recipe show a longer bunch but it is not very significatif due to the machine stability.

--- bunch size

242A (in the morning) : e- [H,V] = [141 um, 56 um]

242A (in the afternoon) : e- [H,V] = [154 um, 58 um] (same as in the morning)

242A after optimization : e- [H,V] = [107 um, 62 um]

238A : e- [H,V] = [161 um, 92 um]

--- Spectrum ==> divergence : to be done

  1177   Thu Jan 8 09:07:08 2026 IC, HG, RC, DN, JMUnder ProcessShift summaryLI | TL | LE | Ring | Linac Commissionning | Ring Commissioning Test of the new receipt from BMAD Isol = 242 A 

8h55: mise en chauffe (modulateur, frigo/chillers, laser, cyclage)

10h20 HV ON

Start with the receipt nominal.  problem with the RF gun laser camera. Solved.

Going to the new receipt for Isol = 242 A

Tuning injection. Good storage.

We performed sveral scans with FPC. The measured vert beam siwe is about 82 um. The best X-ray fluc I3+I4 was about 30-40 kpA.

The size at MRSv hor/vert is about 15/19 pixels

Starting from a certain moment, the trig to trig injection stability changed. See the screenshot. This to be understood.

Going to nominal receipt. After the tuning of the injection, the good storage is obtained. Size at MRSV 15/24 pixels

measurements of the dispersion and LOCO studies. First without sextupoles and later with. To be continued.

Going back to new receipt Isol = 242 A. Storage is bad. Retuning of the TL and injeciton. Good storage is obtained with good tunes 0.17/0.7.

Studies with X-rays will be continued tomorrow.

dispersion and beta function measurement as tunes are seems to be quite stable

Switching on the streak camera.

Phases during the day:

RF Gun: 296; 229; 242

RF section: 218; 209; 218


 

  1176   Wed Jan 7 07:55:45 2026 VM DN MJ KDUnder ProcessShift summaryLI | TL | LE | Ring | Linac Commissionning | Ring Commissioning shift du 07 janvier 2026 

7h55: mise en chauffe en remote (modulateur, frigo/chillers, laser, cyclage)
11h25 HV is ON

Archivage lance

** 11h43 Receipt Ref. from  50_MeV_good_tune_0.17_0.7_20251212_16_03_54.txt.  Beam is in the ring W/O RF

RF gun phase  236 dg., Sect. Att. 2.37 dB, phase 215 dg. Linac steerers: H [0.68 -2.82], V [-2.42 3.05]

12h04 RF 100 kV, phase 12.5 dg. Good storage, screenshots. Charges (BPMs): -114, -112, -115 -115 -113 pA, Tune H: 0.17, V: 0.7, MRSV size: V 14.7 pix, H 27.7 pix

BPM.05-lib.04 Sum of tbtsum is 1.5e11

13h03 RF gun phase 242 dg., Sect. phase 216 dg.
13h32 RFgun phase ==> 247 dg.
13h40 Sect. phase ==> 219 dg. RF 14 dg.
13h59 RFgun phase ==> 249 dg.
13h40 Sect. phase ==> 218 dg. 

** 14h05 Receipt recipe_recipe_TL_Sole242_all_20260106_19_08_32.txt loaded. Ring charge was killed (at injection). Trying to recuperate

14h30 after RCDS on injection ring charge about the same. Synchrotron osc. minimized. tuns the sames, but MRSV is totaly different with two picks

** 15h39 Dispersion measurement using SST3 for 242 A BMAD and old recipes

** ~ 15h45 After loading the 242 A BMAD receipt, adjusting DPI and Sept. to suppress beta oscillations resulted in improved MRSV (h 27.1 pix, v 15 pix).

** 16h15 recipe_recipe_TL_Sole238_all_20260106_18_11_32.txt loaded. RCDS on injection.

It is enough good. MRSV size from 28 to 21 pix hor.

*** Plusieurs images of beam length streak enregistrees pour les 3 recettes (ref_recipe, sol242, sol238)
Rien de conculant a l'oeil (avec les 2 recettes Soleno, dans la 1ere ms le faisceau s'allonge toujours, d'un facteur en gros 2, mais a quantifier) - Images a traiter proprement (repertoire 20260107)

*** Cavite FP remise en etat : realignee, 90 kW stocke, frequence passee de 70 MeV a 50 MeV ==> prete pour jeudi et vendredi

17h30 Stop ThomX

=============================================

*** A faire avec les 2 recettes sol 242 et sol 238 : produire des X et mesurer
         - Trend de flux
         - Scan vertical FPC taille electrons
         - Taille de source X a l'IP avec les fentes 1 + camera photonic

*** Rappel these A. Gramelin FIGURE 6.16 :
           For 100 pC, during the 1st milisecond of storage :
                 -  Bunch length increases by a factor 2 - 3
                 -  Emittance X and Y increase by a factor ~ 0.2 - 0.3

 

 

  1175   Tue Jan 6 08:00:18 2026 KDUnder ProcessShift summaryLinac Commissionning shift du 06 janvier 2026 

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

problème lancement cyclage RI-C1: QP.04, QP.09 et QP.10

Sole 238
Scan_QP0118h27.txt :

  E Sigma norm_emit emit beta alpha gamma error plane QP Q_LI Q_TL
0 50 [[0.14313799542146532, 0.06033515695599282, 0.... 3.096494 0.031648 22.187073 -5.072226 1.204642 False Y QP1 96.810661

136.501018

E Sigma norm_emit emit beta alpha gamma error plane QP Q_LI Q_TL
0 50 [[0.2899399170657115, 0.19572917921414953, 0.1... 1.749609 0.017882 17.973956 -3.768844 0.845901 False X QP1 109.374139

137.033452

recette pour les quads : /tmp_mnt/data/shared/recipes/saved/Studies_BMAD_Sole_Bunch/recipe_recipe_TL_Sole238_all_20260106_18_11_32.txt 

Solé 242A:

  E Sigma norm_emit emit beta alpha gamma error plane QP Q_LI Q_TL
0 50 [[0.6426336031073789, 0.40883800851193447, 0.2... 1.121272 0.01146 78.079217 -13.863508 2.47437 False X QP1 107.263568 134.6379
E Sigma norm_emit emit beta alpha gamma error plane QP Q_LI Q_TL
0 50 [[0.7928102298373866, 0.3730560287510153, 0.11... 6.338747 0.064785 43.69964 -8.519464 1.683796 False Y QP1 107.52352 128.368469

recette :  /tmp_mnt/data/shared/recipes/saved/Studies_BMAD_Sole_Bunch/recipe_recipe_TL_Sole242_all_20260106_19_08_32.txt

 

en PJ : images à QP7 pour les 2 recettes

  1174   Mon Jan 5 10:35:58 2026 MJ Shift summaryLI | TL | LE | Ring shift twiss Q1 versus soleno 

Modulateur en chauffe
Alarme rendant impossible clim casemate . Maher envoie un mail a urgencevc
Check Sf6 : 2 bar ==> Appel JN ==> ajout sf6 2.5 bar

Programme : quad scan qp1 (et qp7) soleno de 200 a 260 avec chaque fois espread minimum

soleno 230    betax 26     alphax -5      betay 18       alphay -3
soleno 240              33                -5.6              51                   -8
soleno 260                                                      62                   -8

Code reconstruction crash pour soleno 250 X et Y et pour soleno 260 en X

A suivre demain

  1173   Fri Dec 19 07:22:31 2025 KDUnder ProcessShift summaryLinac Commissionning | Ring Commissioning shift du 19 décembre 2025 

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

 

*** Programme ***

- dernière demie-journée de mesures. Mesure de dosimétrie (dose transverse)

- autres ?

  Draft   Thu Dec 18 09:39:38 2025 DN, IC, HG, KD, MJ, and Co Shift summaryLI | TL | LE | Ring | Diag | Aimants | Laser | Vide | Linac Commissionning | Ring Commissioning X-ray measurement/characterization campaign 

The machine was warmed up remotemy

The FPC is ready. The laser is locked.

9h Start HV

9h08 Modulator is put to standby. Access to "repair" shutter X-line

9h20 Restart the beam

9h39 Problem with the camera laser photocathode. It does not start. So; feedback does not work and the generated charge is drifting.

9h45 Another access to fix/restart the camera

10h Camera is working. Chillers gun and RF structure are ON also now;

10h30 Beam in the ring
Miss triggering issues, see ICT data for example. 
13h : Kevin recabled the delay box on the "right" cable to avoid bad 50 Hz signal.  

ELOG V3.1.4-395e101