02/06/2026

~15h30 Starting all system

16h Start up of the modulator, laser, magnets

Problem with the shutter, it is in the orange state. 

08h45 Start-up modulator, laser, magnets

09h38 Shutter Laser Linac is yellow. Tuning off the gun operation key does not change it to the red. Need help.

09h55 HV is on

09h56 HV is off. The fridge was started then chillers.

10h20 The laser shutter is OK.  HV is on

recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

Linac steerers were adjusted.

11h35 Energy = 50 MeV, Laser Phase 9 dg., Sect. Phase 223 dg., Sect. Att. 2.19 dB, I_Gun -48.3388 pC, I_Linac -54.8343 pC, I_TL -53.5573 pC RF_Ampl. 0 kV, RF_Phase -30.5 dg.

Beam is in the ring W/O RF

11h45 RF is on

11h54 Energy = 50 MeV, Laser Phase 9 dg., Sect. Phase 223 dg., Sect. Att. 2.12 dB, I_Gun -49.1448 pC, I_Linac -55.6953 pC, I_TL -54.5153 pC RF_Ampl. 49.3668 kV, RF_Phase 35.5 dg.
It looks like RF cavity tuning does not work. Help is needed.

12h07  Mesure d'energie en sortie canon sur LISST1 en fonction du courant du steerer LI/PS/STR.01-H.01

'Energy=4.83MeV'

Several scans of the laser attenuator 200 to 430 at the Gun attenuator 0, 1, 2, 3 dB but at the same phase.

13h22 Standby

13h32 HV is on

15h17 Thomx was stopped

11h20 Try to restart the accelerator. Start-up modulator, laser, fridge, chillers

Problem, with all magnets control All DS are in FAULT state. Help is needed.

It is solved.

MPS prevents klystron output power from turning on. Probably due to the closed FP valve.

15h45 ThomX was stopped.

08h35 Start-up modulator (it was already on standby), laser, magnets, cycling.

As yesterday there is a problem with the MPS to start the machine. We are trying to investigate whether it is related to the vacuum or something else.

Problem with the solenoid COL.01 (Internal Interlock Hard).

Help is needed.

At this moment, apparently we are blocked by the closed vacuum valve of the FPC. To be checked with Nourredine (emails sent).

The vaccum level in the FPC is not yet good to open the valve. Eric will check it.

10h10 Switched to the Linac+TL+EL configuration. HV is on (the modulator was in the local mode). Interlocks even at HV 1200 V, the sect att. 3 dB. Linac 04 vac is high.  

10h33 There are breakdowns at 26 dB the section att. and 25 dB of the RF gun att. These are not in vacuum breakdowns. Probably it is the klystron problem.

10h50 The modulator is in the standby mode.

Maher is coming to check the klystron and Jean-Noel is working on the solenoid power supplies.

11h40 Maher fixed problem with the klystron by increasing the filament power. At 84 kV, I = 48.7 A (microperveance 2.0). At 293 kV, I = 294 A (microperveance 1.85, should be 2.0).

12h03 The machine configuration without FP closes the photocathode laser shuter, so we can operate only in the Linac+TL+EL configuration.

12h36 Energy = 50 MeV, Laser Phase 25 dg., Sect. Phase 253 dg., Sect. Att. 2.26 dB, I_Gun -95.0704 pC, I_Linac -92.7397 pC, I_TL -3.7568 pC RF_Ampl. 0 kV, RF_Phase 35.5 dg.

Laser Att. 360, Linac steerers H: [0.31 -2.62], V: [-1.87 2.88]

12h43 Energy = 50 MeV, Laser Phase 26 dg., Sect. Phase 250 dg., Sect. Att. 2.35 dB, I_Gun -101.3924 pC, I_Linac -99.5194 pC, I_TL -101.3812 pC RF_Ampl. 0 kV, RF_Phase 35.5 dg. 

13h17 Laser Att. 410 (max) Energy = 50 MeV, Laser Phase 26 dg., Sect. Phase 250 dg., Sect. Att. 2.35 dB, I_Gun -138.8712 pC, I_Linac -135.3968 pC, I_TL -137.4172 pC RF_Ampl. 0 kV, RF_Phase 35.5 dg.

At the moment maximum charge is 135 pC with irise Ø of 1.3 mm  (possibly because the laser photocathode shutter is in the wrong position)

13h25 The modulator is in standby mode. Maher can remove the MPS short.

The problem with MPS is the OC/AVAL02 FP valve. It is in two states at the same time: Closed and Open.

It was the OC/AVAL01 FP valve

recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

14h54 Beam is in the ring w/o RF. Thank you all !!!!.

15h15 Laser Att. 360,  Energy = 50 MeV, Laser Phase 26 dg., Sect. Phase 250 dg., Sect. Att. 2.42 dB, I_Gun -179.1795 pC, I_Linac -205.8011 pC, I_TL -186.6367 pC RF_Ampl. 99.1184 kV, RF_Phase -50 dg.

Laser Att. set to 320 for 100 pC

15h25 Energy = 50 MeV, Laser Phase 26 dg., Sect. Phase 250 dg., Sect. Att. 2.33 dB, I_Gun -96.7941 pC, I_Linac -124.7882 pC, I_TL -102.9734 pC RF_Ampl. 99.1184 kV, RF_Phase -50 dg.
 

15h28 recipe_recipe_LI_TL_RI_all_20260121_10_35_05.txt loaded. There is storage, but it is necessary to optimize it

15h33 ring_saving

15h35 recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

15h36 ring_saving

17h41 ThomX was stopped

09h35 Start-up modulator

09h52 Start the fridge

09h55 Start chillers

The photocathode laser is in the init state. Is there anyone who can fix it?

The MPS screen does not display any selections for machine configuration. The table (Choix des configurations de Tir) is empty, so "Machine au Repos". 

13h30 Problem with MPS and laser cathode prevents us to start the accelerator. We put the modulator OFF.

Please, send email to thomx.operation in case of any progress on that matters.

08h26 Start-up modulator, laser, fridge, chillers, cycling

09h31 Low SF6 pressure => JN helped

11h HV ON. We do not see the RF signals, even  the baselines (RedPitaya). The Wevecatchers are also not triggered. probably problem with timing or their configs. Help is needed !!!

Apparently, there was the electricity cut. Help is also needed with the RF cavity.

12h10 something happened. Modulater went to OFF, dipoles are in error state. The valves became orange on the PSS screen.  

Problem with Air Comprime => Solved !

JN et Maher heped to start again the Air Comprimee.

Mochamed fixed RF amplifier, but it gives only 10.7 kV.

Power supply of WAC3 is dead.

16h00 We had another problem (see photo).

16h15 The problem with valves was fixed

16h17 HV on

16h22 The RF gun's ICT was too low. Solution - increased the RF gun's attenuator to 1 dB, then returned it to 0 dB. Dark current corresponds to 15 mV

16h35 Solenoids are off (external error). the RF Gun IST shows 100 pC (Laser phase of 99 degrees). the section exit ICT shows 20 pC 

16h52 ThomX was stopped

17h18 It seems resetting the red pitaya does not help

07h30 Start-up modulator, laser, fridge, chillers, cycling remotly

Vacuum in the FPC is still ~1e-7 (sometimes goes to ~7-8e-8);

No RF signals. The same problem.

Vacuum problem in the half ring; same as on Friday. Solved by Eric.

Problem with SEPTUM. It does not start.

RF cavity in the Ring can be se only to 10 kV. We can not set other voltage. Maher checked, probably the rror with profibus. Hep is needed.

10h30 starting the linac. Transport of the beam in the TL.

Cameras do not work corretly, so it is difficult to adjust the energy spread of the beam.

Septum problem prevents us to inject in the ring.

10h56 Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.43 dB, I_Gun -71.6393 pC, I_Linac -69.4399 pC, I_TL -69.8472 pC RF_Ampl. 10.8122 kV, RF_Phase -48.5 dg.

11h JN is helping with the RF cavity

13h The problem with RF cavity is not solved, the reson why the voltage does not inrest and stays at 10 kV is not clear.

Maher with JN tries to solve the problem with SEPTUM,

13h20 Septum is OK now. Beam is in the ring w/o RF. recipe_recipe_LI_TL_RI_all_20260422_18_34_34.txt loaded

13h30 Laser Att. 340

13h33 Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.52 dB, I_Gun -92.8156 pC, I_Linac -122.1748 pC, I_TL -95.4294 pC RF_Ampl. 0 kV, RF_Phase 0 dg.

14h Mistreggiring problem. Nicolas found that the IP address of Rigol changed.

The colleage from SOLEIL will come in the afternoon to see the problem with the RF cavity.
The PC in the control room (client 1 and 2) are very slow, not clear what is the reason.

15h17 Kickers off. TL/DP off. Energy = 50 MeV, Laser Phase 108 dg., Sect. Phase 220 dg., Sect. Att. 2.52 dB, I_Gun -102.5088 pC, I_Linac -99.2102 pC, I_TL -0.0013676 pC RF_Ampl. 0 kV, RF_Phase 0 dg.

I am trying to check the beam charge using TL/FC01. The cable from wac02/ch0 (A9 on cross-panel #xxx) was connected to the oscilloscope CH2 (impedance 1 MΩ). According to Vincent, the cable length is 31 m, and the capacitance is 2.5e-9 F. At the operating point, the dark current and the beam charged the cable (approximately 6 μs after triggering) to -35.69 mV. The dark current alone charges the cable to -13.7 mV (with the screen inserted). Therefore, the beam charge is Q=C*V=2.5e-9*22e-3=55e-12 C. With the screen inserted - DeltaV=22.7 mV. The first attempt to change the position of the beam does not increase this voltage significantly (but reduces it at large displacements). Reducing the solenoid current to 180 A increases the voltage on the cable, but the DeltaV remains almost the same: 23.3 mV (58 pC). Thus, there is a certain discrepancy between ICT measurements and result of these measurements that needs to be understood.

17h35 The RF resonator is now working. But the RF resonator DS does not show the frequency. It is necessary also to adjust the phase of the resonator.

17h43 ThomX was stopped

10h Intervention to repair the water leakage. It was repaired.

New problem with vacuum pomp is found in the ring. The two problems are due to the water leakage. Intervention is ongoing.

12h Warm up of the machine

14h30 Start up of the machine in the mode LI-TL-EL. Goal: tune the injector and perform the measurements.

Mistriggering. All interfaces to see the current freauency do not respond.

Intervention of synchronization team is needed to continue.

15h30 Stop the beam for vacuum intervention .

12h55 : Vacuum level OK after TRIG ON
13h00 : Laser ON : no spot on screen put last motor positions (2266 && 4158) --> No spot on screen :(
13h05 : Gun activities incresed (Vac > 1e-7 && reflected power)
13h12 : Laser put OFF

9:07 Mise en chauffe

Verifucation Alignement laser

Maher: changement de dosimetres

11:58 Demarrage faisceau

Recette LI+TLstraight 20230825_17_20_30

Signal observe a l'oeuil. Recherche a la camera. Difficile a voir dans le couloir.

16:52 Signal observe a l'oeuil puis a la camera. Signal YAG puis signal Cerenkov.

Image Cerenkov1: expo=145000 (2,9s) TL/PS/STR.01-H01=0A

TL/PS/STR.01-V01=+0A

Image Cerenkov2: Modulateur HV

Image Cerenkov3: TL/PS/STR.01-H01=+3A

Image Cerenkov4: Baisse du temps d'exposition a 90000 (1,8s)

Image Cerenkov5:  TL/PS/STR.01-V01=+4.5A

Image Cerenkov6: Charge baissée de 100pC a 20pC

Image Cerenkov7: Charge remise a 100pC

17:30 Acces controlé: un iris etait partiellement fermé.

17:40 Fin. Passage de la machine a Kevin.

* Essaie de différents code pour la synchro (CPLD) fait par F. Wicek :

- avec ligne à retard interne (bascule) : trop de jitter au niveau du 50Hz (4ms sdev) mais peu visible sur les BPM

- solution sans synchro FP : (pas de jitter 50Hz : 120us sdev, mais pas de synchro FP)

- Essaie de faire un veto avec un comptage d'horloge 41MHz ==> pas réussi (le code ne réagis pas comme il faut = investiguer le VHDL)

* Essaie de la ligne à retard 33MHz (AO.01-AO.07) = pas d'influence sur le signal à première vue.

21h extinction de la machine

Goal of the shift: Reestablish the good storage at 500.38 and then try to optimize the storage and orbit.

Start up of the machine.

RF cavity start up by Mohamed. Water leakage. Jean-Noel will fix tomorrow mornig. Mohamed also says that aparently the sinal from ring syntetizer is a bit noisy, to be checked with Nicolas.

problem with trigger of the TL BPM. Nicola fixed the problem. The cable was broken.

Load of the machine setting from 19/05. The injection in the ring is very unstable from shot to shot due to the tuning of the cavity. Coming to 100 kV @500.38 MHz synchronized with the ring. RF cavity works stable.

Beam on TL BPM.02 drifts a lot and very fast. See screenshots.

With the previous setting, we did not get the previous orbit. After small reoptimization we received the resonable storage. Still we should work on the orbit correction.

The main idea fo this week is to prepare the beam for the search of the first X-rays.

Bonjour,

Selon Astor, il y a encore des problèmes sur les clients 1, 5, 6 et 7...

Est-ce que quelqu'un pourrait regarder? Cela bloque le redémarrage des mesures de charge.

Merci d'avance,

Nicolas

Pour la synchro, les generateurs de retard ont ete redemarres.

Pour les diags: redemarrage de icePapControllerB6 et Wavecatchers.

Signal OK (sans faisceau) sur BPM, ICT et sur ecrans.

Bonne Année à tous !

Redémarrage de ThomX

- Mise en route du CC (PG, JNC)

- Mise en route du modulateur et des chillers (MO)

- Mise en route des Diagnostics (ND)
 

15h00 : Ampli laser redémarré

15h10 : Tests de démarrage de modulateur apres chauffe (MO)

Pression SF6 ok

15h53 : Modulateur à 1090 V

Laser en route, faisceau visible sur camera LI/DG/SST.01 et charge 130 pC, phi = 240 degres déterminé avec scan charge phse IHM avec laser non centré

Shutter fonctionnel, ouverture iris à 2 mm pour test du feedback laser

Alimentations fonctionnelles

A faire pour la suite : Visualisation du phototube de la photocathode sur la redpitaya à mettre en place, IHM charge EL/DG/FC.01 charge positive lors du passage de la LE en décembre à vérifier

16h38 : Arret faisceau

16h55 : Arret du trig modulateur, manque une autorisation, en cours d'investigation

Bonjour,

Selon Astor, il y a encore des problèmes sur les clients 1, 5, 6 et 7...

Est-ce que quelqu'un pourrait regarder? Cela bloque le redémarrage des mesures de charge.

Merci d'avance,

Nicolas

8h53 Serveur DNS et DHCP non redémarré, ping ne fonctionne pas, en attente d'une solution

Re-démarrage automate et cpci (JNC)

14h13 ping sur automate ok

15H

er/sy/rac.17-elr.01-rdp.03    dans IHM healthckeck remarrage impossible .. dans astor

Remise en route synchro et camera (ND)

Re-démarrage de tout dans astor

Reste à regarder : er/sy/rac.14-elr.01-rdp.03 en server off qui refuse de se mettre on

Allumer le laser photocathode.

pompage vide pompe ionique prévu pour lundi, pas de faisceau lundi.

Remise en chauffe du modulateur

Reboot des redpitayas pour avoir le signal HF sur l'IHM

En attente de la fin de chauffe du modulateur

16h50

apres 3 redemarrages du modulateur....

5 plantages des redpitaya avec redemarrage Hard obligatoire

et une jauge de pression qui interdit le passage du modulateur en mode trig!

Nous arretons la machine

la mesure du courant d'obscurité (soit disant aisée à réaliser... ) est reportée à une date ultérieure...

en conclusion ThomX n'a pas besoin d'avoir un laser fonctionnel pour dysfonctionner...

Apres un OFF/ON des baies alim et des transfo + baie synchro OFF/ON la synchro semble etre de nouveau alive

16h15 Chauffe Klystron

ICT bpm et yag semblent ne pas se declencher au bon moment

Impossible de faire quoi que ce soit. On ne trouve pas le bon fichier delays diags etc ... Meme apres appel tel avec  Vincent.

Bon we

Après coupure électrique de cette nuit. Rédemarrage de tous les systèmes :

Général:

 - toutes les baies sont allumées

- Tous les clients de la salle de contrôle redémarrés

- les rondes sont tombées

Synchro:

- Synchro redémarrée avec le compte opérateur

- dernière recette "20211028_1105_deplacement_trigger_linac_a_40_micro_s.xml" rechargée (est ce la bonne ?)

- l'oscilloscope trig. Il y a des loupés sur la voie 1 (voie jaune)

Vide:

- Compresseur réallumé

- pompes acquittées.

- Toutes les vannes sont fermées

- le vide Cavité FP en rouge sur le MPS.

CC:

- Beaucoup de serveur sont rouge (Client2, libéra et redpitaya) (Gogh aussi n'avait pas starter de redémarré, un reboot à résolu le problème)

- l'Archivage est HS, le server est blanc sous astor (mais starter est démarré), impossible de restart les DS d'Archivage.

08h50 Start up of the machine

- Problem  with the vaccum, the valves around the RF cavity are down. Eric came. He checked and the problem is with the cable. it should be changed. Intervention is ongoing.

- The water leakage is detected on teh Ring RF cavity. Intervention of Mohamed and Jean-Noel is needed. Jean-Noel is informed  about the problem.

- Synchro problem. Jitter at FPCavity scope screen. Vincent is working on that.