VM, VK, ND; Summary of the ring commissioning meeting
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This week: beam on Thursday.
So far we did not see any screenshot of Ring variables check.
Looking at last week's data, shot to shot charge instability seems to be > 15% |
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VK,IC, SC, VM, ND; Summary of the ring commissioning meeting
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No beam last week. No beam this week.
Machine recovery on 2/2 => Nicolas may try to tune the machine with students.
Data taking on 9/2 for diags and machine characterization. |
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VK, VM, SC, ND, HG; Summary of the ring commissioning meeting
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Summary of last week:
- On Thursday the beam energy was very different from usual (magnets current higher 172A for TL; 176A for RI) => made it impossible to re-use
previous settings for the ring and to find new settings. |
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VK, IC, VM, JH, ND; Summary of the ring commissioning meeting
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Discussed recent orbit correction of the expanded orbit.
Need to make run with cavity detuning from its resonant conditions
used in the conditioning.
Discussed measurement of tune, and possible origins of inconsistant/noisy measurements.
Either BPMs signal processing or weak excitation. Beam size?
Need to do measurements with scope, to see if we can interpret TbT |
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VK, IC, VM, JH, KD, ND; Summary of the ring commissioning meeting
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The ring orbit has been re-established despite some difficulties after the shutdown.
The ring cavity has been started. Whatever the phase it kills the beam.
Two hypothesis: |
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VK, IC, VI, JH, SC, ND; Summary of the ring commissioning meeting #5
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See slides attached to the indico page https://indico.ijclab.in2p3.fr/event/8885/
Pb with BPM => visual check of electrodes + hardware swap
Pb with steerer => Need to identify who will do the intervention and when |
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VK, IC, VI, JH, ND; Summary of the ring commissioning meeting #4
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- 300 turns achieved.
- Probably more but limited by libera cut-off frequency.
- Need to measure the injection axis |
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VK, IC, LS, ND; Summary of the ring commissioning meeting
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Discussion mécanique
- Tous les dipoles ont été alignés par rapport à des surfaces de référence
- Le décalage du centre magnétique par rapport au centre mécanique a été mesuré par Cynthia et pris |
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VK, IC, JH, VM, LS, MB, ND; Summary of the ring commissioning meeting
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Main studies:
- Measure bucket width in phase on Thursday at 500.02MHz => no storage beyond 45kV
- Measure frequency with spectrum analyser => 500.39MHz |
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VK, IC, AM, ND; Summary of the ring commissioning meeting #2
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Slides are at https://indico.ijclab.in2p3.fr/event/8750/
- There is a difference in BPM numbering in Tango and MML => we should stick to Tango names.
- Beam was very unstable during the past week |
ND, IC; Steerers and BPM map for the ring 
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| See attached files. |
ND; RE: Beam requirements for the ring
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An IHM to check some of these parameters has been created (git/panneaux/StatusInfoIHM_ring_vars.py) and added to Plateforme_IHM...
Quote:
The following parameters are required for ring operations: |
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ND; RE: Summary of the ring commissioning meeting
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Regarding the remote control of the RF synthetizer: it can only be controlled via GPIB and RS-232.
=> Phase shift will be done from the synchro synthetiser
=> Power control can be done with a variable attenuator controlled by the synchro synthetiser or a delay generator. |
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ND; Notes from ThomX Physics meeting
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Present: IC, VK, VM, VC, SC, MEK, KD, MJ, HG, ND, MO (sous réserve d'oublis)
Visio: CB
L'ordre du jour et les transparents présentés en réunion sont sur: https://indico.ijclab.in2p3.fr/event/9205/ |
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ND; Verification variables pour l'anneau
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L'IHM de verification des variables pour l'anneau a ete mis a jour.
Il est accessible dans plateforme IHM section "Outils", éeme collone, "eme ligne: "Check vars for RING".
Utilisation de l 'IHM (voir copie d'ecran ci-joint): |
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ND; RE: Notes from ThomX Physics meeting
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Présent: VK, SC, KD, MJ, HG, ND
Présentation par Marie. Cf indico https://indico.ijclab.in2p3.fr/event/9242/
Demo par Slava. |
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ND; Réunion Physique ThomX
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Transparents sur: https://indico.ijclab.in2p3.fr/event/9358/
Quelques notes de la réunion de Physique de ThomX:
- Présentation de Marie sur les mesures dans le linac |
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MO HM; test RF modulateur longue durée (journée)
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but : test fonctionnement modulateur et RF sur la journée
8h55 démarrage modulateur et refroidissement
10h00 démarrage RF ( HV=1090V ) |
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MO; démarrage
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| 8h35 mise sous tension: PSS, LB9000, modulateur, chillers |
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KD; mesures et shifts Linac
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Réunion 31/03
Prochaines mesures à faire :
Canon : |