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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Entered by Nicolas Delerue from 193.55.29.171 on Thu Dec 10 14:42:53 2020; Clients 1, 4 et 5 non fonctionnels
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En complément du message de Hayg, client 4 et 5 ne fonctionnent pas non plus (en plus de client 1).
Nicolas |
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IC, VK, VI, VC, JH, HG, ND; Summary of the ring commissioning meeting #1
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Status slides presented by Iryna available on indico at https://indico.ijclab.in2p3.fr/event/8749/
The beam parameters required for a good injection in the ring were discussed.
The following required parameters were identified: |
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IC, VK, VI, VC, JH, HG, ND ; Ring objectives
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This entry is to be updated as the work progresses.
1) Re-establish beam transport to ring
2) Scan in time the septum |
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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 |
IC, VK, VI, VC, JH, HG, ND ; RE: Ring objectives
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(1), (2), (4) and (5) from last week have been done other items in progress.
New to do list:
(0) Re-establish beam transport to ring |
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IC, VK, VI (ND); Summary of the ring commissioning meeting #3
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Shift summaries for the ring for last week are at
https://elog.lal.in2p3.fr/THOMX/Commissionning/568
https://elog.lal.in2p3.fr/THOMX/Commissionning/570
https://elog.lal.in2p3.fr/THOMX/Commissionning/571
The
problem with the pulse jumpis with 12ns delays has been identified and fixed (it was related to the synchronisation system).
The main issue identified |
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IC, VK, VI, VC, JH, HG, ND ; RE: RE: Ring objectives
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New to do list:
(0) Re-establish beam transport to ring
(0bis) Check energy jitter in TL/BPM.02 and TL/SST.02 |
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IC, VK, VI, VC, JH, HG, ND ; RE: RE: RE: Ring objectives
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To do list:
(0) Re-establish beam transport to ring
(0bis) Check energy jitter in TL/BPM.02 and TL/SST.02 |
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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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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. |
IC, VK, VM, SC, ND; Summary of the ring commissioning meeting 
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Notes from last week:
Beam was very unstable (probably energy instabilities), lot of time was spent tuning the injector.
Beam instabilities prevented
us from having a good storage.
Unable to start the extraction line dipole.
Comments: |
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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, 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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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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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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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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IC, VM, SC, JH, VC, ND; Summary of the ring commissioning meeting
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Excitation (betatron oscillation) on the beam observed by exciting it with the extraction kicker => initial measures of the tune.
Tune measured close from expected value.
Reason for oscillation damping is not understood. |