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Laurette presented the latest information from the machines operation side. The deceleration efficiencies and beam intensities are showing very good values, with record number of 1.1 e7 pbars extracted per bunch from ELENA. Reproducibility is also very good, with significant improvement wrt last year.
The autosteering system onto the target works fine, although some drift in the imaging system causes overcompensation.
The emittances are better than last year, although there is a linear corelation between the intensity of the bunches and the emittances, transverse and in bunch length.
The IPM system has been tested and works, although the gas injection is blocked due to a stuck valve. Nice profiles -non destructive- were nevertheless extracted just after sublimation, profiting of slightly higher local residual pressure. Maintenance is planned during next TS.
The SEM in AEgIS transfer line that was swapped during YETS has been fully tested and after some adjustment now shows very useful beam profiles.
The ELENA e-cooler gun filament went off 2 times in 2 weeks due to WIC and FGC63 crate issues. This caused a couple of hours of beam time loss as the filament takes a long time to heat back up.
ELENA is being operated in between pbar shots, and used for physics by GBAR, at the satisfaction of users.

 

Francois showed the skeleton of the next YETS, starting on 2nd dec for pbars, with ELENA machine continuing with Hminus till 9th dec for GBAR and 15th dec for PUMA. Early restart of physics is targeted for 28th April. The main activities for this time will be the extraction of 2 magnets of vacuum sector 2B. This activity is on the critical path for restarting the machines.
The dates for the services interruptions are still provisional as nothing has been formally confirmed yet. A full schedule is planned to be shown at next ADTC meeting.

AOB: -Surveyors will perform a scan of the hall from the building central beams on 6th of June, causing an interruption of the crane of a couple of hours. This will be confirmed by a mail in the coming days.
-The TS is scheduled for 12-14th June. Access inside AD ring is by Impact ONLY !
-An interruption of the experiments side crane is planned for the 18th of June. details to be provided later.
-PUMA SEM installation planned for week 25, if all test are successful.
-TELMAX installation progressing. Full report will be given in next ADTC meeting (planned 27th June)

 

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