Entered by Marie Jacquet from 134.158.89.45 on Wed May 3 20:10:26 2023; RE: Stabilite LINAC
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Entered
by Marie Jacquet from 134.158.89.45 on Wed May 3 20:10:26 2023 wrote:
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VK, IC. AL; Understanding of the shift in RF frequency 18x
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8:40 Start warming up, problem with PSS. It was restarted.
Problems to start and tune the RF cavity. A clear working procedure and reliable tuning should b defined to optimize the Ring comissioning progress.
Feedback for teh RF has the suspicious behavior. At motor position close to the nominal, the feedback ofsets the motor in the negative direction |
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VK, IC; RF frequency of the Ring
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In the morning, after the start-up pf the machine, scan phase-charge and small tuning it was possible to store the beam with the settings from previous
day.
The storage was optimize withthe dipole current of 159.9 (best storage up to now). RF cqvity voltqge 20-100 kV. |
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LS, ND; Prise de donnees 23/05
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9:30 Demarrage machine
Fin installation Cerenkov + tests MRSV
Laser alignement Cerenkov arrive jusqu'a la camera a balayage |
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NC,IC, VM,lS;
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9:10 warm up modulator
10:30: cycling of magnets
10:20 : scan charge phase |
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VK, IC. VM, LS; Studies on the beam revolution frequency 12x
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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) |
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ND, LS, IC, VK, VM; Studies on the Ring revolution frequency 8x
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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. |
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ND, LS, IC, VK, VM; RE: Studies on the Ring revolution frequency
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Bonjour,
Pouvez vous enregistrer les images de l'oscilloscope et le donnée brute à la place des screenshots. Il y a une option dans
l'interface web pour enregistrer l'oscillogramme "proprement". De même pour les images, cela permet de faire des traitements à |
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VK, IC. VM; Reestablishing running conditions at 500.38 MHz
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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 |
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VK, IC. VM, ND, LS; beam storage
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The main idea fo this week is to prepare the beam for the search of the first X-rays.
Start without RF cavity. Study of the orbit. Orbit correction. We menage to correct hor. and vert. orbit.
We put the RF cavity ON. A lot of interlocks during the day. Difficult to operate i this conditions. |
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VK, IC. VM; Srart of the beam physics measurements 14x
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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). |
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VK, IC. VM; Orbit correction, BLM in the Ring 7x
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The BLM detector boxes were installed in the ring. We connected 3 fibers and 2 scintillator detectors in th ring to be able to observe the beam losses.
Cabling, connection and checks of the BLM without the beam.
Machine start-up. Modulator was switched on at ~9h30. |
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VK, IC. VM, AL, ND, LS; Orbit correction, optimization of the storage, study of the RF frequency 8x
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9h30 Start of the modulator and lasser (GATE is closed).
9h46 Data is taken as background.
Cavity is tuned to 500.38 MHz. Optimization of the energy and phase. |
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Entered by Marie Jacquet from 134.158.89.45 on Thu Jun 22 11:43:12 2023; Bruit de fond diodes ligneX
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Entered by Marie Jacquet from 134.158.89.45 on Thu Jun 22 19:39:22 2023; recherche IP e-/laser
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** Au vu de ce shift tres instructif d'aujourd'hui, pour demain:
1) Le sens le moins chronophage des scans table FPC sont:
Partir en Ty negatif, et aller vers Ty pos |
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VK, IC, DN, RC, JN; search for X-rays
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8h30 Start of the modumator, laser, magnet cycling
9h45 Beam is ON. Scan charge vs. RF phase.
Attribute Li/OP/OPT.01-ATT.01 is showing value 340mm, this is different from the nominal ones of 300-303. Charge to be remeasured at nominal |
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all; X detectes aujourd'hui
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Aujourd'hui on a detecte des X en mode desynchro (notre signal correspond a ~ 3.10**6 ph/sec)
*** Pour :
- 100 pC stockee pendant 100 ms
- 30 kW dans la cavite
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SC/CB/JNC; run du 3 juillet 2023
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9h30 Intervention Maher pour dosimètre
10h00 Mise en chauffe modulateur et refroidissements
14h prises d'image laser selon églage du miroir M5. Le laser n'est pas bien aligné sur l'iris --> a reprendre |
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SC/CB/ME; Faisceau linac et cavite RF
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8h55 Démarrage modulateur et refroidissements
Intervention SPR terminé
Solenoide = 190A, pas de quadrupoles, LI/PS/STR.01-H.01 = -1A, LI/PS/STR.01-H.01 = 0.90A, position laser = hor 4.635mm ver 1.736mm, visualisation |
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ND,LS, KD, JNC; Shift du 24/07/2023
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10h: Accès casemate
Ajout de deux cables près de TL/ICT.02, un jouant le role d'antenne et l'autre connecté à une résistance
50 Ohm. |