8H15 demarrage chauffage Klystron et chiller

9h15 bunker ouvert (intervention société extérieure jusqu'à 9H30)

10H injection dans l'anneau avec recette 20221020-1420

14.20 come back to shift after seminar

-adjust TL 154.7 and Ring dipoles 156.56

- injection optimization  with RCDS  . 7parameters: dpi, Kicker, Septum, H,V steeres 3 and 4 of TL

- orbit correction

-data taking

ri-c2 /BPM 01-Lib04, need to be checked. Horizontal Orbit is always around 4 mm at that position.

9h58 Démarrage Att sec 10dB 3us 25Hz HT = 1200V

On augmente progressivement la HT

10h03 HT = 1215V att sec 10dB

10h04 On descend progressivement de 10dB à 1dB

10h28 passage à 1 dB vide in section = 6.9e-9  vide out section = 1.5e-9

10h33 passage à 0.9 dB vide in section = 7.5e-9  vide out section = 2.6e-9

10h36 passage à 0.8 dB vide in section = 8e-9  vide out section = 3.8e-9

10h40 passage à 0.7 dB vide in section = 8e-9  vide out section = 4.8e-9

10h44 passage à 0.6 dB vide in section = 7.7e-9  vide out section = 5.2e-9

10h47 passage à 0.5 dB vide in section = 7.4e-9  vide out section = 5.5e-9

10h55 passage à 0.4 dB

13h50 interlock à 0.4dB

13h53 interlock à 0.4dB

13h56 interlock à 0.4dB

Pause

14h42 reprise à 0.4dB

15h42 Interlock machine

18:40 FIN 

1) Setup (pj 1) : petite sphere "jaune" devant le vortex (je ne sais pas en quoi elle est faite, peut-etre un laiton ...)

2) "pulse characterisation" (pj2) --> fichier  20250502.ini  cree

3) Acquisition avec 20250502.ini (pj3) 

==> j'ai reussi a obtenir qqchose ... Quoi ? ==> aucune idee ... (le detecteur n'est pas calibre)

A suivre

Demmarrage machine à 8h45

IHM ThomX warm-up

8H55 Chauffage klystron, Frigo  Ampli laser

9H   Chiller  

PB    er/hf/rac.17-api.di1   et TL/PS/DPI.01

Demarrage cyclage aimants

Start of the RF cavity 500.25 MHz and 50 kV

Start of the accelerator (mode THOMX on MPS)

Loading the receipt good_20240117_17_22_41

Charge-phase scan, tuning of the RF section phase (Gun phase = 273, LIL phase = 114, Att = 1.35)

Transport to the Ring but only 1 turtn. Optimization of the injection but no big imrovement

Loading the receipt from 16/11/223

Optimization of the transport

At 11h50 the modulator interlocked . Then on the MPS there are errorrs (see photo). Need the intervention of support.

13.50 Eric came and fixed the probmlem of one of vacuum valves of the ring, that was causing interlock.

Synchro problem, Kevin repaired.

14.40. Kevin , Ronic entered the bunker to change cable on FPC.

15.10 Restart the machine. Tune of the injector (gun phase 230 and LIL phase 111, charge 72 pC ICT1). it seems that now the energy is not very stable, at TL BPM2 the SpX goes from +2 to -6 (see the screenshot attached). Injection in the ring.

Restart of the RF cavity (problem to start from the interface in the control room)

Only one turn in the ring

During the phase scan of the RF cavity (with rigol) strange bahavior of the trigger. Misstriggering (see the screenshot attached). Problem to be understood. Conclusion: to change the phase of the RF cavity better to use the phase shifter (old position 6094 and nez position 2320).

Storage is reisteblished and improved after optization of the injection : the last good receip is

recipe_recipe_LI_TL_RI_all_20240124_18_17_03.txt

The injection stability to be further investigated (see the screenshot attached)

Use of the trigger on demand. Works well. Checked the duration of beam circulating in the ring (5-10 sec on the scope).

Some tests to check the correlqtino of the energy jumps on TL BPM2 with RF cavity and pulsed elements and dipoles. It seems that there are no effect.

8h30 démarrage chauffage modulateur

9h: mise en chauffe laser, chiller et remise SF6 (2.4bars --> 2.6bars)

9H30 puissance Klystron ON 1215V

phase Emax canon 142

section att 2.56dB  phase 239° dispartion min

demarrage machine 8H50

Alim

EL/PS/DPI.01 demarrage à la main (ATK pannel)

ET/PS/DPI.01 demarrage à la main (ATK pannel)

Healthcheck OK 9H

ThomX warmup done.... wainting for modulator (around 9H50)

Beam from RF gun is double kernel.

Start without RF. Search corrrect settings for TL: energy, position, dipole.

Store orbit; Freq =500.0685 . RF on 100 Kv

Orbit is the same with and wo RF

12.30 Maher put dosimetry in bunker

Fine scan in RF +- 3 kHz. Horizonatal Tune 0.17

Beam at TL becomes unstable after 14h. See screenshot. Data taken. We could not solve this problem , it is wery confusing to work with such energy jitter.

Pour couper le Laser :

• il faut arrêter seulement l'Ampli, et laisser l'oscillateur (pas besoin de l'arrêter).
• Redémarrer l'oscillateur peut le mettre dans un mode instable.

ssh: connect to host client3.thomx.fr port 22: No route to host

Faisceau en cours

Client 1 ne répond plus

On last Friday, we found that there is a potential problem with QUAD 9, 10 an 12 as by switching them OFF, we obtained better transport and finally had the evidance of the seconf full turn.

RI-C2/PS/QP.09

RI-C2/PS/QP.10

RI-C2/PS/QP.12

Today, we checked the polarity and found that the polarity of the RI-C2/PS/QP.10 was inversed at the level of power supply (even though was checked last time in July). We have restore the good polarity of the RI-C2/PS/QP.10 by swapping the cables at the PS. 

We plan to check the beam transport in the afternoon.

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 

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

Ce matin la charge est parfaitement transmise de soleno 210 a 250, et decroit tranquillment ensuite. Je n'ai pas reussi a faire fonctionner le script donc j'ai pris un screenshot

12h07 sol=300
12h08 sol=280
12h09 sol=260
12h10 sol=250
12h11 sol=240
12h12 sol=230
12h13 sol=220
12h14 sol=210
12h15 sol=200
12h16 sol=190
12h17 sol=170
12h18 sol=150
12h19 sol=130

Les conditions etaient :
  * alignement "quads"
  * canon 0.5 db
  * iris=1.3

--> Pb de shutter "orange" et/ou "faussement vert " les jours precedents ??

Atténuateur laser à position = 450

Modification de l'attenuateur laser à position = 500

Charge maximum = 96 pC

Scan charge phase correspondant sans solenoide de focalisation :

La consigne de température du canon est passée à 31 degres puis à 30.9 degres

Nouvelle consigne : 30.9 degres

Début alignement laser, OK

La phase dérive de quelques 5-10 degrés

Réalignement du soleno

TX 0 Ty 2.4, RX 2.4 RZ -4

On passe la section à 180 A sur coil2, position BPM x=5.8mm et y =0.2mm sans steerers

avec une correction steerers pour ^etre à zero à la phase 100 degrés sur la section

str02v = 0.02A

str02h =-1.33A

By looking at the BPM transmission tool one can see that there is more charge on TL/BP.03 than on TL/BPM.02 (see attached image).

The BPM seetings have been checked and they are similar.

One can see a similar effect when comparing TL/ICT.01 and TL/ICT.02.

Possible interpretation: the beam is scrapping the beam pipe and creating a shower of secondaries.

Nous avons testé de retirer l'iris pour mesurer la charge.

la charge max passe de 100 pC max à 150 pC. Le bruit semble aussi plus important (plus de dispersion sur la charge).

Changement des vis solenoides en cours

Suite à une demande de Jean-Noël, la fréquence linac a été changé.

Nous sommes maintenant à la fréquence nominale + 500Hz: 2998.550500MHz.

La fréquence anneau est inchangée.

Suite discussion avec Jean-Boel et Vincent, la frequence linac a ete remise a 2998550000Hz (nominal).

La frequence anneau est inchangee a 500.250000 MHz

Les frequences peuvent etre verifiee dans PlateformIHM / Synchro / Synthetiser status

Intervention cavité FP, ouverture casemate

Alimentation des solénoïdes en erreur

DS synchros sont éteints, où se trouvent les fichiers pour re-démarrer ces DSs?

Laser en route