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ABP-HSS Section meeting
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Description
News, round table discussion
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Rogelio : Alessio left, requiring organizing a follow up of his activities. Please join the PySixDesk activity if you are interested.
CVOID19: An email was circulated by Richard. Teleworking up to 50% should be ok.
Helmut comments on the LHCC last week: the experiments appear all to be determined to stick to the schedules, allowing for the machine test in autumn '21 and a RUN3 start in early in '22. He plans to present a short LHCC summary in the LMC next week.
Roderik: the collimation team is re-organizing activities following Alessio's departure and a continuation of Eleonora's work who will leave soon.
Alexander Huschauer reports on Injectors.
There are activities ongoing to include transfer lines and Linac3 (so far mostly based on TRAVEL) in the common optics repository.
Plans are to converge on a common framework for all injectors and the LHC.
Holes and leaks were detected in PS testing, resulting in short circuits. This is analyzed and will be repaired as soon as possible.
Tobias on OMC:
The team is strengthened by two new members, Eirik and Dominique as already introduced in the ABP-information meeting.
There were two recent meetings: Elena presented machine learning detecting machine errors and Leon amplitude detuning studies and a comparison with SAD including solenoid with fringe field.
Hector works on K-modulation and uses also phase information to constrain optics, useful in particular also for the VdM optics, and Felix works on applications using the AC-dipole to measure amplitude detuning from sextupoles.
Riccardo says he is checking the LHC sequence and works on fixing many issues, aiming to release the verified sequence before the start of RUN3. The spectrometer changed position. Checks will include collimator and BPM positions and octupoles.
Rogelio suggests to report about this in the next meeting.
Laurent: the next MAD-X course is programmed. The number of participants is limited to five because of COVID19.
He had discussions with Tobias on MAD-X related to DELTAP. Tilt and alignment combined requires checking for PTC and work is ongoing on observation points for MAD-X tracking. A BV-flag related bug was found and fixed, as already mentioned last meeting.
Rogelio encourages more frequent MAD-X releases and asks about MAD-NG testing. Laurent says it started and that he is also active on MAD-NG documentation. Riccardo suggests regular reports on the progress of MAD-NG testing.
Presentations with slides
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Riccardo, Python support in BE/CO;
he attended a meeting yesterday with BE/CO. BE/CO increases python support and is working on tools, pytimber, pilsa, pyjapc and others.
Riccardo also reported on activities for cpymad that appears to become increasingly popular, allowing to control MAD-X from python in multiple instances.
Felix asks about support for cpymad on MacOS : not yet done, should not be too difficult, Riccardo is looking for volunteers to help.
Alex, Alignment activities in the PS.
PS had a major consolidation in LS2, including renovation of pole face windings used for tune and chromaticity control during acceleration, taking also into account movements of the concrete base using as reference the nine PS alignment pillars.
The work is done by the alignment team, following a procedure documented in EDMS.
He shows the results of the alignment smoothing campaign. Alignment this time also includes straight sections. Methods to automatically exchange data with EN-SMM are required.
Discussion : approval of drawings and communication with the alignment team should include our group as done for the LHC.
FCC Status and Challenges, Frank Zimmermann.
FCC has an integrated program, starting with FCC-ee in with various stages, Z,W, Higgs, ttbar, and later FCC-hh in the same tunnel, using existing CERN infrastructures for injectors. The FCC circumference is roughly 100 km. FCC-ee is designed as double ring, with a large 30mrad horizontal crossing angle allowing for crab waist optics. FCC-ee beams aim at a very small vertical emittance for very flat beams. SuperKEKB makes good progress and can be considered as test and demonstrator for many of the challenging FCC-ee features. The European H2020 FCC innovation study was recently accepted for funding with the highest achievable score. The study has excellent contacts with host states. Frank shows timelines and goals for the coming years, lists keywords and international partners. Lot of more work is needed for tools for leptons, beam-beam etc. So far largely based on outside collaborators, trying to also build up a good base at CERN.
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