Test de l'IHM de cyclage des aimants de l'anneau

- l'IHM fonctionne (teste uniquement pour QP)

Defaut (internal interlock hard) sur RI-C1/PS/QP.05,RI-C1/PS/QP.06,RI-C2/PS/QP.02

Cyclage des autres QP OK.

17h25: Test de cyclage de

RI-C1/PS/QP.05

RI-C1/PS/QP.06

RI-C2/PS/QP.02

Resultats

RI-C1/PS/QP.05

RI-C1/PS/QP.06: Failed at 11% when magnet reached 10A => Ne pas cycler au dela de 9.4A

RI-C2/PS/QP.02: Failed at 11% when magnet reached 10A=> Ne pas cycler au dela de 8.5A

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.txt, recipe_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

Etiquettes des températures :

nous avons corrigé les étiquettes affectées aux températures, cf image.

Nous voyons bien que la régulation de la températures se fait sur la température de la sortie du Chiller.

Par contre nous observons une différence de température entre la clarinette et la pt100 sur le canon de l'ordre de  0.6 °C en plus pour une consigne de 30°C et 1.3 °C pour une consigne 36°C.

demarrage chauffage 8H20

test nouveau code synchro 50Hz => ne fonctionne pas

Le nouveau code 25Hz ne fonctionne pas  => code installé 25Hz (juin 2024)

10:30 Beam ON

Loading recipe: LI_TL_RI_good_20241114_15_27_46

11:30 RF section phase: 191 deg, Att=2.56dB

Start position feedbacks...

Beam seen in the LE (but very weak).

Recipe saved as TL_test_20241129_12_06_24

12:15 Access in Fosse nord for ALTO => 1h30 break.

13:45 Restart beam

Difficulty to tune...

15:12 Extraction at t=92.3

LIB.01 was at -7.48 moved to -4

15:41 Ext kicker very stable

Beam seen in EL/DG/BPM.01

Beam intensity on the BPM is varying with a long period. We can not identify the source of the variation.

Transmission is about 20% but most of the losses probably occur in the EL.

17:00 Beam OFF

10h20 HV on

Erreur sstLI 

Qqun peut debloquer ca ? nicolas ?

c'est bon deremarrage serveur camera

Synchro HS on ne peut rien faire

reboot synthe baie 9 pour acquitter l'erreur network

Ca ne change rien

BESOIN URGENT d'un expert SYNCHRO

La synchro est opérationnelle.

pB de redemarrage des hardwares avant les serveurs du coup pas de connexion réseau

La synchro a été testée ce matin:

Il y avait effectuvement un pB de faux contact qui empechait la synchro de fonctionner.

Pour ce qui est de l'interface Fréquence Synchro:

le choix des fréquences fonctione... il est un peu récalcitrant... il faut parfois valider (bien cliquer sur le choix dans le menu déroulant) plusieurs fois les fréquences  de gauche à droite (de mémoire modulateur , linac, ring, diag,)

Les fréquences 25 10 5 hz sont dispo pour le linac

Les valeurs des seuils des deux première pompes vide ont été modifiées de 5e-7 à 5e-5mbar

Le modulateur trigge, le PA est allumé mais nous n'avons pas de RF.

Cela semble venir du timing. Vincent regarde.

Les wavecatchers affichent des valeurs erronées (WAC.01)

La camera laser ne trigge pas en mode externe : comment on change internal_trigger en external_trigger ?

Vérification Pression SF6 =2.45 bar

Vérification Températeure chiller Clarinette =30 +/_ 0.1 °C (consigne 29.20°C)

Vide section sans HF @ 30 °C: In section 5.3 10-10 mbar & Out section 6.6 10-10 mbar

Impossible de mettre HV => erreur  de lecture de débit modulateur ==> intervention de Maher (redemarrage nécessaire de PC modulateur)

signaux RF mesurés :

avec Oscillo :

orange : reflechi section Prs

violet: incident section Pis

vert: refléchi Klystron Prk

jaune : incident Klystron Pik

avec la carte Redpitaya:

vert : puissance transmise dans la charge fin de section : P charge section

rouge : puissance reflechi section  Prs

blue: puissance incidente section Pis

* Reprise conditionnement 3µs & 25 Hz et faire durer le conditionnement à l'étape de la puissance nominale (att. sec = 0.1 dB correspondant à Pisection =24 MW)

* Mettre Att. sec @ 10 dB

* Augmenter progressivement HT de Alim 1000 V @ Alim 1215 V _HT 289 kV (Pik=33 MW)

* Faire baisser Att. sec progressivement

A partir de la valeur att. sec =1 dB on baisse l'att sec d'un pas de 0.1 dB

Att. sec = 0.9 dB (Pis= 20 MW) ==> vide In section 6.9 10-9 mbar & vide Out section 1.9 10-9 mbar

Att. sec = 0.5dB (Pis= 22 MW) ==> vide In section 6.6 10-9 mbar & vide Out section 3.7 10-9 mbar

13h30 : Att. sec = 0.1dB (Pis= 24 MW) ==> vide In section 5.3 10-9 mbar & vide Out section 2.6 10-9 mbar ==> voir capture ecrans RF signals jointes

16h00: Att. sec = 0.1dB (Pis= 24 MW) ==> vide In section 3.2 10-9 mbar & vide Out section 2.2 10-9 mbar ==> Au bout deux heures et demi la pression in section baisse et reste stable à 3.2 10-9 mbar quant à la pression out section  baisse légerement et reste  stable autour de 2.2 10-9 mbar . 

Fin 16h00

NB: un autre test est programmée vendredi 16/08 pour finaliser et valider le conditionnement de la section à sa puissance nominale  (Pis=24 MW) .

10h50 Mise en route à 10dB, HT = 1000V

11h04 HT = 1215V, Att sec 3 dB vide in section = 9.3e-9 vide out section = 1e-9

11h05 HT = 1215V, Att sec 2 dB vide in section = 9.4e-9 vide out section = 1e-9

11h06 HT = 1215V, Att sec 1 dB

Interlock à 1dB

11h06 HT = 1215V, Att sec 1 dB vide in section = 7.2e-9 vide out section = 1.2e-9

11h16 Att sec 0.9dB vide in section = 8.5e-9    vide out section = 2.5e-9

11h21 Att sec 0.8dB vide in section = e-9    vide out section = e-9

11h27 Att sec 0.7dB vide in section = 9.5e-9    vide out section = 6.8e-9

11h32 Att sec 0.6dB vide in section = 9.2e-9    vide out section = 7.9e-9

11h38 Att sec 0.5dB (Pis=22MW) vide in section = e-9    vide out section = e-9

12:39 : Interlock ? (scope Auto -> Norm to catch last signal)

12:51 : Interlock section

13:28 : Att sec 0.5dB (Pis=22MW)

14h03 Interlock à 0.5 dB

14h07 Att sec 0.4 dB vide in section = e-9    vide out section = e-9

14h50 interlock 0.4 dB

17h40 interlock 0.4 dB

18h55 fin

The main task for today is to measure the revolution frequency without RF cavity with the spectrum analyzer.

Start-up of the machine.

After setting the previous setting, the orbit was very different. We checked the injector, the beam also was different (based on the beam images) and based on the RF plots we suspected that the timing of the laser has changed.

We changed the delays, reworked the transport but then it needed much more time to optimize the injection. We made the reseanoble storage but decided  to come back to the original settings (to be consistent in oour studies). After that, not clear why, the orbit came back to the expected values (as it was on Friday).

Start of the spectrum analyzer. Machine is set to the seetings from last Friday. Beam in the ring is not very stable. We had a few kV in the RF cavity for a short period of time.

Measurements without the RF power and one measurement with a small power (a few kV). Plots are attached. The screenshot was done for the different oribt (dipole values).  Prelimenary conclusions: At nominal lattice (with some scaling), we can keep the beam in the ring in the energy range, which corresponds to the attenuation of the RF section of 1.97-2.14 dB (nominal is 2.03 dB). This coresponds to the revolution frequency range of x30 => 500.33 - 500.47 MHz.

At this frequency, the  mean orbit changes from about ~-3 to +3 mm.

Taking into acount this freauency/orbit change (70 kHz - ~3mm), it means that to come to the nominal RF frequency of 500.02 MHz, the mean value of the orbit in radial direction should be increased by about ~18 mm. The calculations show also that to reach teh nominal frequency due to the energy change ~5-7%, the larmor radius in dipoles should be increased by ~20 mm. All this is in agreement with what we have measured today.

=> All this estimations are certainly prelimenary.

Problem with RF cavity. Mohamed tried to solve it during the day, No storing power. We need the RF cavity to continue our studies.

Goal: understanding of teh beam natural revolution frequency. Study the effect of the dipoles.

We have started from the previous setting of the machine. Then we loaded the settings from last december and received better storage. RF cavity is OFF.

By working with the spectrum analyzer, we understood that previous measurements very probably were affected by the noise coming from the synthetizer, so the frequency measured corresponded to the synthetizer frequency.

At the same time, during the investigation, apart of the false peak given by the synthetizer frequency, there was some signals (difficult to interpratete) aroung 500.4 MHz. Investigations are ongoing.

In parallel, we are checking the BPM cabling convention by using the beam to be sure about the orbit readings.

Study of signal on scope:

Yellow: Losses monitor

Green: Sum of 4 electrodes RIC2/BPM.06

Blue: Long open cable (background pickup)

Screenshot from 2023-05-31 15-14-12.png Beam stored only for 1 turn not reaching

Screenshot from 2023-05-31 15-18-05.png: Green (BPM sum) cable disconnected

Screenshot from 2023-05-31 15-19-40.png: Green (BPM sum) cable reconnected

15:30 Checking BPM polarities

16:30 Created IHM to lock position on TL/DG/BPM.02 :  Diags/BPM/lock_position_tl_bpm_02.py

16:32 reload ring recipe

Screenshot from 2023-05-31 16-35-21.png : BPM signal with current in ring

Screenshot from 2023-05-31 16-49-49_I_159_3.png

Screenshot from 2023-05-31 16-51-58_I_161_90.png

Screenshot from 2023-05-31 16-56-12_I_157_90.png

Screenshot from 2023-05-31 17-02-41_I_159_90.png

Screenshot from 2023-05-31 17-03-15_I_161_90.png

Screenshot from 2023-05-31 17-10-02_I_157_90.png

Screenshot from 2023-05-31 17-11-53_I_161_90.png

Screenshot from 2023-05-31 17-13-59_I_157_90.png : We see the markers at the two node position. Delta X = 900ps

Screenshot from 2023-05-31 17-21-18_I_157_90.png : 3ns/div

When we change the dipole current we confirm that time to come back to the BPM change...

17h25: Machine stop

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

9:20 Start aligning

12:40 Alignement done for both linac and ring.

Health check: Archiving not working

12:52 Start beam

Pb temperature gun and section

14:00 Beam on Cerenkov

Fixing misc. problems.

One motor of the MRSV mirror is dead.

17:30 Beam length measurement. t~15ps (convoluted with transport and focalisation)

*Note:*

- Time lost due to chiller problems

Pour illustrer la fin de l'entree elog 745 d'aujourd'hui  :

(==> Saute de position du faisceau, cela n'est pas corrélé à une perte de puissance ou de changement de phase (phénomène impossible à reproduire avec l'atténuation section et/ou les phases canon et section) ==> E-log Marie pour visu saute)

ci-joint le resume du traitement des donnees du 24 et 26 avril ( = donnees stabilite)

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

Start machine without RF cavity. During the day several reboot of the libera.02 (TL).

Study of the dispersion. Measurements of the horizontal dispersion by changing the injector energy (RF section attenuator).

Orbit correction.

Study of the tune. Tune response with the steptune. Tune measurements.

First try to measure the horizontal beta function at the quadrupoles.

RF Cavity ON. Good storage at 50 kV 500.38 MHz. Dispersive orbit. SHould understand how to reduce it. 

Different studies on the orbit.

Observations: position at the  TL/DG/BPM.02-LIB.02/SpX drifts a lot (a few mm range) all day long. We should correct it all the time to keep the beam orbit and storage.

Le spectro Si (vortex/falconX) a ete calibre avec une feuille d'etain

Calib checkee avec une feuille d'or

Cf screenshot spectre Sn (rouge) et Au (vert) superposes

IP-Fente2 : 8835 mm
IP-capteur_CdTe: 10460

Calib ouverture Fentes2 : +0.1 en H / -1 en V

Fentes2 ouvertes a 0.5x0.5 mm ( ==> 0.6 H -0.5 V)

SPECTRES pour positions Fente2 (mm) : H Fente2 (H hexa ech) / V Fente2 (V hexa ech)

** V fentes2 = 27.5 mm

H fentes2
7.5 mm (-9.6)
5.5
3.5
1.5
Viktor reajuste electrons
-1.5
-6.5
7.5bis
9.5(-12.0)
11.5(-14.4)
13.5(-16.8)
15.5(-19.2)
18.5
21.5
25.5(-31.2)
30.5(-37.2)
35.0
45.0
Kevin reajuste laser and electrons
11.5bis
Fentes1 fermees a 5x5 mm (fentes2 11.5/27.5)
Fentes1 reouvertes

** V fentes2 = 29.5 mm (hexa 142.4)  vers ~15h

H fentes2
11.5
13.5
15.5
9.5
7.5
2.5(-3.6)
20.5(-25.2)

** V fentes2 = 31.5 mm (hexa 144.8)  vers ~15h30

H fentes2
20.5
15.5
13.5
11.5
9.5
7.5
2.5

** V fentes2 = 36.5 mm (hexa 150.8)  vers ~15h50

H fentes2
2.5
9.5
11.5
13.5
20.5

** V fentes2 = 45.0 mm (hexa 161.0)  vers ~16h10

H fentes2
20.5
11.5
2.5
-20(23.4)

** V fentes2 = 25.5 mm (hexa 161.0)  vers ~16h25

H fentes2
2.5
11.5
20.5

** V fentes2 = 20.5 mm (hexa 131.6)

H fentes2
20.5
11.5
2.5

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

Spectres a differents temps d'extraction

Extraction electrons a 5 ms, 10, 15, 20, 1, 50, et 100=recette Kev

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

fin de shift 19h