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https://cern.zoom.us/j/63913530325?pwd=NHh2VEtQSkVEMXFaQlRDOVYxYVd1QT09
Minutes of the PS-SPS Users Meeting held on 5th of August 2021
PS Machine Report (Bettina Mikulec)
Since last user meeting overall availability of 94%.
More symmetric H profile for beam on nTOF target (improved bunch rotation).
Loss reduction for nominal 1500E10 ppp MTE cycle.
A few preliminary results of TR studies made with GaAs sensors bonded to Timepix3 chip will be presented.
SPS Machine Report (Verena Kain)
Relatively good availability the last week (previous years 85 %). First AWAKE run 1 2021 finished Tuesday evening. Several issues still after LS2 for various system. Main focus on issue of vertical dump kicker de-conditioning for 25 ns beams. Reason not understood. Required another mini-scrubbing during dedicated MD slot this Wednesday. Was reasonably successful. Other interruptions to come from access system card replacement for the next 4 weeks: each Thursday from 7am-9am no beam, no access. Origin of 100 Hz ripple on spill not found yet. Not correctable. Next week: HiRadMat run 1. Today still: preparing 3e+13 per spill for NA.
SAFETY (Letizia Di Giulio)
nTOF (Javier Praena)
Target performances are excellent with 4 pulses per SC at 8e12ppp (high intensity for us).
Alignment of detectors to the center of the neutron beam has been finished.
Operation of the facility (target and experimental areas) will be continued with the setup already installed until September.
A short intervention is on going now for our detectors.
High and low intensity pulses should be needed and are expected in 2 or 3 weeks, this is ok for us.
AWAKE (Livio Verra, Edda Gschwendtner, Giovanni Zevi Della Porta)
The second week of proton run was very successfull. We observed proton self-modulation seeded with the electron beam and clear signs of phase reproducibility. Time jitter of proton bunch has been a recurring issue, it seemed to be solved last Friday (July 30), and allowed us to take good data Saturday to Monday, but appeared again on Tuesday (August 3). We have started preparing for our next proton run, scheduled to start on August 23.
HiRadmat (Pascal Simon)
The teams completed installation and dry run. Ready for beam next week. HiRadMat will not take the beam 24 hoursper day.
NA users tour de table
H2 : FASER CAL (Brian Petersen)
Took large set of measurements with electron, muon and pion beams with very large range of electron momenta all week with no significant issues. Running at DAQ limit for most of the time. Beam quality and purity was very high, particularly after wobbling change on Friday afternoon. Completed all of the planned measurements and a few bonus ones were added based on first data feedback. More than 150 million events collected to be analyzed over the next months. This dataset is very valuable in preparing the first FASER physics run at the LHC.
H2 : ATLAS FCAL PULSE (absent)
Nikos Charitonidis: Delay of cool down because of some misunderstanding between the user and EN-EL. Cool down today and start of data taking later today.
H2 : STORM (Mattia Soldani)
Will be ready for beam.
Nikos Charitonidis: Some negotiation for the beam parameters with NA64.
H4 : LHCb CAL (Matteo Salomoni)
Experimental set up descritpion and first preliminary results for the ECAL LHCb upgrade 2 R&D.
H4 : NA64 (Laura Molina Bueno)
All proceeding to plan.
Beam Lines H2 & H4 (Nikolaos Charitonidis)
H6: ATLAS ITK Pixel (Andre Rummler)
H6: EP RDET (Dominik Dannheim)
- Goal of this beam period is the characterisation of small pixel-detector prototypes (<~10000 um^2 matrix size, ~10 um x 10 um pixel size) with sub-nanosecond timing capability, developed within CERN EP R&D programme.
- Installed ATTRACT FASTpix device-under test setup and MCP time reference (thanks to Eraldo!) in Timepix3 telescope at the end of H6B.
- Dipanwita tuned 120 GeV hadrons beam for high rate (~5E6 per spill) and focused it on our setup. Would be nice to reduce beam size a bit more, if possible. Running now at 1E6 per spill, which should still be ok for parasitic users.
- Some further work in the area expected for today. Then high-statistics data taking for the rest of the beam week. Test of very high-rate running possibly some time next week.
Would like to test high rate up to 10^7 to be scheduled with RP and with ATLAS ITK Pixel (parallel user).
H6: RD42 (absent)
H6: ATLAS BCM (absent)
H6: ATLAS AFP (Tomas Komarek)
AFP-ToF Beam test oveview
H8: ATLAS TRT (Anatoli Romaniouk)
A few preliminary results of TR studies with a GaAs sensor boned on Timpix3 chip will be presented.
H8: LHCb (Heinrich Schindler)
Three setups (all in H8.A):
- RICH (continuing measurement programme started in July).
- 3D sensors for VELO Upgrade II (continuing from parasitic run two weeks ago).
- Mighty Tracker (HV-CMOS silicon sensors): finishing installation and calibration of the setup, plan to start taking data later today. Safety clearance took place yesterday.
Beam Lines H6 & H8 (Dipanwita Banerjee and Johannes Bernhard)
H8: Beam set-up for LHCb in H8A/138, i.e. 180 GeV/c positive hadrons with parallel optics.
Beam Lines P42 & K12 (Lau Gatignon and Johannes Bernhard)
Setting-up of P42 and K12 close to be completed. Issues with beam instrumentation have been largely resolved, in particular the miniscan of the T10 target works now. The focusing issue of 2018 seems to be still present, but working with the (+0.44,−0.66)
optics works fine and as expected. Next steps would be checking upstream divergence on T4 together with OP to optimise transmission losses and final checks of parallelism at the KTAG/CEDAR in K12 together with some possible fine tuning of collimation (about half a day with beam).
K12: NA62 (Dario Soldi)
text
Beam Line M2 (Dipanwita Banerjee and Johannes Bernhard)
M2 already pre-commissioned, some fine tuning needed as soon as Compass is ready and the magnetic chicane can be moved.
M2: COMPASS (Jan Matousek)
- Progressing with the target cryostat and magnet cooling
- Now 180 K inside.
- Material loading planned for 10th August - on schedule.
- Spectrometer commissioning ongoing
- Trigger setup finished.
- We asked to increase the beam intensity for calorimeter calibration and to test the detectors in real conditions.
- While waiting for the target, we used the time to repair a broken wire in DC04. It is now back in the setup.
- Safety clearance obtained last week (urgent issues fixed, more to be done during YETS)
Supercycles, Wobbling, Target intensities
See INDICO agenda for details
AOB
See INDICO agenda for details
Minutes by the respective speakers, edited by E.B. Holzer
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