PS/SPS User Meeting

Name: PS/SPS User Meeting
Start: 2021-08-12T11:00:00+02:00
End: 2021-08-12T13:00:00+02:00
Location: ZOOM

Thursday 12 Aug 2021, 11:00 → 13:00 Europe/Zurich

ZOOM

Eva Barbara Holzer (CERN)

Description

https://cern.zoom.us/j/63913530325?pwd=NHh2VEtQSkVEMXFaQlRDOVYxYVd1QT09

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Minutes of the PS-SPS Users Meeting held on 12th of August 2021

PS Machine Report (Matthew Fraser)

Availability ~90%
OP issues:
- Monday: issue with pressure switch for PI.KFA45 ~1h7min downtime
- Tuesday morning: 200 MHz cavities tripped with high-intensity MTE cycle, beam for SPS perturbed during ~3h30min
- Saturday: took ~1h to restart after electrical glitch and waited 2h more for Linac4 RFQ restart
- Sunday early morning POPS tripped (communication problem with a power converter) ~4h30min downtime
- Sunday morning: issue with PI.KFA45 (communication issue with PLC required also controls piquet) and PE.KFA71, ~2h30min downtime in total
- Problem with phone hansdet in PS island running out of battery, new handset to be installed ASAP: any issues please call PS Booster phone
OP progress
- TOF:
  - Work on injection, transition, extraction, orbit correction and longitudinal blow-up
  - H profile on target more symmetric after improvements on bunch rotation
  - Optics measurements in FTN continued; stay with these settings until RP survey end Aug.
- AD
  - Improvements led to increase of transmission to 95%
  - Required retouching the steering to the AD target
- MTE @1500E10 ppp
- EAST
  - Continue preparing low-intensity commissioning cycle, beam at extraction septum, HW commissioning ongoing
Upcoming
- DSO test 17 August: beam stop 07:30, access at 08:00, beam expected back within an hour but perturbations to be expected
- Commissioning and setup of East Area on 23rd of August

SPS Machine Report (Hannes Bartosik)

availability of about 80%
SFTPRO
- increased intensity on Friday from 1e+13 ppp to 1.9e+13 ppp - intensity on T4 nominal, less intensity on T6
- ongoing investigations on transmission to T10 target
- progress on 100 Hz correction on the spill
- This morning access card exchange and repair of 400 kV transformer
HiRadMat run:
- first extractions to experiments on Tuesday
- scrubbing in parallel to NA physics during the night Tuesday to Wednesday to allow acceleration of 288 bunches
- very good progress until Wednesday afternoon, then stopped due to vacuum leak on beam window
upcoming
- increase intensity of SFTPRO beam
- repair/exchange of beam window in HiRadMat and if possible, complete a revised pulse list for HiRadMat experiments
- next week: LIU MD week with reduced duty cycle for NA during daytimes (8:00-18:00)
Q: high losses in the region of the splitters: might require a dedicated MD on a Wednesday

SAFETY (James Devine)

Thanks to everyone for timely submission of their ISIEC forms.
Question about progress of the Pigeon issue in EHN1 - being followed up by EN-EA and SCE.
A reminder that electrical installations, including circuit boards should all be IP2X (i.e. you cannot touch any electrical parts with your finger). All experiments and test beams are advised to ensure that any bare circuit boards are covered (ideally with a rigid protection, as a minimum with a cloth or fabric cover). This will protect you from any electrical risk, as well as protecting the sensitive electronics in your experiment from pigeon droppings.
The roles in the ISIEC form have been amended following the feedback last week from Andre Rummler.

Comments:

Keep the big door closed to keep the animals out.
Bastien Rae:Remember to wear safety shoes and helmet. Link to purchase safety shoes (can be tries on before you purchase them).
If you find a water infiltration in EHN1 -> send email to EHN1-TSO@cern.ch

nTOF (Javier Praena)

Target performance is excellent. Maximum temperature around 50 degrees.
Since 2nd August per Super cycle:

4 pulses at 8e12ppp
1-2 pulses at 2e12ppp.

This combination of high/low intensity pulses is perfect for us. The changing in the proton beam size and shape has not shown up to now any remark changes in the signals. On going study.
Alignment 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 middle of September.
The goal is an accurate determination of the neutron flux with the new target in the existing experimental areas EAR1 (185 m, horizontal) and EAR2 (20 m, vertical).
In October 2021 we would be able to take data for the new experimental area around the spallation target: NEAR, several experiments will run from 0 to 5 m (n_TOF, R2E and R2M).

AWAKE week 34 (Eloise Guran, Edda Gschwendtner, Giovanni Zevi Della Porta)

The second proton run of the year will start on Week 34. In the 2.5 weeks between runs we are focusing on several issues (proton BPM, proton magnet) and improvements (optical alignments, Laser energy). To help troubleshoot the proton-time-of-arrival-jitter issue, which has appeared post-LS2, SPS has offered to send some protons to AWAKE next Wednesday so that RF experts can take a closer look at this issue.

HiRadMat (Pascal Simon)

First extracted beam on Tuesday 08/10
BTV commissioning (until 10:35 am, Wednesday 08/11):
- 0.25 mm Optics up to 288 bunches
- 0.5 mm Optics up to 144 bunches
Dedicated experiment from Wednesday 08/11 10:50 am
- Pulse list requested consecutive 288 bunch pulses extracted into HiRadMat
- After about ~60 high intensity pulses, vacuum interlock in TT66 triggered (~15:20)
Status 08/12:
- Waiting for exchange of TT66 beam window
- Roughly third of high intensity pulses completed

NA users tour de table

H2 : ATLAS FCAL PULSE (John Rutherfoord)

Very sorry I won’t be able to attend the meeting. I will be in the air.
Our test beam run was to simulate the extreme ionization rates expected in the ATLAS forward calorimeter during the HL-LHC era and to examine the effect on the signal pulses. A hot beta source created the ionization background and 350 GeV electron showers created the signal pulse. Thanks to a lot of help from many CERN people our test appears to be a success. The data we have looks good, perhaps a little better than we anticipated. Analysis will take some effort but should be straight-forward. My team is now disassembling the apparatus and will pack it up for shipment back home.

H2 : STORM (Mattia Soldani)

Quick online update of the setup installation and preliminary runs with part of the detectors already up and running. We’ve got a ~1 day long delay because of some minor technical issues on our side and a bit of a slowdown due to the crane operation and beam pipe installation. We plan to start with the physics program at 120 GeV/c electrons this evening/tonight (high quality available now).

H2 : KLEVER week 33 (Mattia Soldani)

Part of the equipment will be already up and running from the previous week (STORM), so actually an important part of the setup is already being installed and tuned right now. The rest of the apparatus will be installed and put in operation next Wednesday.

H4 : LHCb CAL (excused)

Finished test with e-beam and moved to H8 for pion and muon beam measurements.

H4 : NA64 (Laura Molina Bueno)

see slides.

Beam Lines H2 & H4 (Nikolaos Charitonidis)

All good.

H6: ATLAS ITK Pixel (Andre Rummler)

Main user from 28.07. to 04.08., secondary from 04.08. onward and ongoing (extended by one week)
Samples arrived quite late due shipping problems but main goal - operation with multi chip module - was achieved; software modifications ongoing and to be tested
Good data with moderate beam rate was taken during second week thanks to Dominik Dannheim; high rate data also taken during most of the time for comparison and evaluation of reconstruction capability
Secondary goal - operation of ACONITE telescope after LS2 break and re-commissioning - successful including the cold box; gateway computer malfunctioned and had to be replaced temporarily; encountered issues with high rate on NI crate; workaround to be fixed for next time (additional linux server)

H6: EP RDET (Dominik Dannheim)

Main user from Aug-4 to Aug-11.
Tested ATTRACT FastPix pixel-detector prototypes in CLICdp Timepix3 telescope at the end of H6B. Successful re-commissioning of our high-rate telescope. Obtained large data set for 64 mini matrices under test, including scans of operating parameters.
Excellent beam conditions thanks to Dipanwita, +120 GeV hadrons with rather high rates (~5E6/spill) and small beam size (<1 cm^2). Beam rate limited by instable beam conditions (mostly last week) and PAXN14612 radiation monitor in H6A. (As opposed to 2018, when it was limited by PAXN16601 monitor in H6C.) To be further investigated with RP. Minimum beam size limited by large distance to focussing optics.
Smooth cooperation with parasitic ATLAS users in H6A, with minimal impact on our measurement programme (few additional accesses, few hours of low-rate beam conditions).

H6: RD42 (Harris Kagan, Andrej Gorisek, Mathieu Goffe)

10.8. 3D pCVD diamond sensor bonded to Calypso C ASIC of ATLAS BCM upgrade project was installed as the DUT in MALTA telescope (instead of the Ljubljana telescope) at H6A.
11.8. First runs were recorded with DUT analog signals read out trough DRS scope.
12.8 Digital output (TOT) from DUT will be recorded with beam and threshold scan performed on individual channels.
In parallel Strasbourg strip telescope was setup after the long break and is up and running, ready to accept DUT’s again.

H6: ATLAS BCM (Andrej Gorisek, Harris Kagan)

See RD42.

Door to PPE146 is broken (not posing a safety issue).

H6: LHCb VELO week 32 and 33 parasitic (absent)

Moved to H6 from H8.

H6: ATLAS AFP week 32 and 33 (Andre Rummler)

Currently setting up. Safety visit soon.

H6: MEDIPIX week 33 (absent)

H6: SND (absent)

H8: LHCb (Heinrich Schindler)

Successful data taking with three setups (VELO, RICH, Mighty Tracker) in H8.A during the period 4 - 11 August.
Short report about the Mighty Tracker testbeam (characterisation of HV-CMOS silicon sensors) is attached to the agenda page.

H8: LHCb CAL (Iouri Guz)

Installed in H8.A Plan to take data with charged hadrons at different energies.
Need Cherenkov counter for pion/proton discrimination.

H8: FCCee week 33 (Roberto Ferrari)

preparing the set-up.

H8: ProTOV (Alessandro Rocchi)

Propose to share the "DUMP" platform with CMS RPC. CMS RPC to contact the SPS Physics Coordinator and the CMS test beam coordinator for this additional beam request.

Beam Lines H6 & H8 (Dipanwita Banerjee and Johannes Bernhard)

For H6 we are continuing with the 120 GeV hadron beam. This week we have RD42 as the main user with ATLAS BCM, ATLAS ITK, ATLAS Malta and LHCb as parasitic users in PPE146.
Continuing with 180 GeV/c pion beam in H8 and preparing several other beam files for lower energy hadron, muon and electron beams. Alexander will be back as beam physicist from Saturday, Aug. 14th.

Beam Lines P42 & K12 (Lau Gatignon and Johannes Bernhard)

Both beam lines are set-up for physics data taking. There is a follow-up meeting on Aug. 12th for a better understanding of transmission losses with the aim to provide full intensity on the T10 target as soon as possible.

K12: NA62 (Dario Soldi)

NA62 is now collecting data using the full intensity available on T10, after a period of commissioning with lower intensity. The actual number of protons on T10 is 22-23 x 10^11, in agreement with our trigger rates. Last friday after the beam tuning we actually saw an intensity of 25, but then it seems reduced a bit. We would like to see the behavior of the experiment at the nominal 33, but in the near future would be nice to reach the 25 seen friday. Today we do a fast muon run, and then we go back to kaon to take statistics.

Beam Line M2 (Dipanwita Banerjee and Johannes Bernhard)

Repair of a jack for movement of several elements of the M2 beam is planned for Friday, Aug. 13th. This is needed for the ‘transverse’ configuration where the beam needs to enter with a certain angle towards COMPASS, then being compensated by the horizontal kick of their target dipole magnet. For now, the configuration is ‘longitudinal’, i.e. without prior deflection towards their target. More information in the electronic logbook.

M2: COMPASS (Jan Matousek)

Tue 10. 8. Successful target material loading. No signs of a leak.
Now cooling the refrigerator and supercconducting magnet to He temperature.
Keeping the previously outlined schedule.
Thu 5. 8. Beam intensity increased from ≈ 25 × 10^11 to 50 × 10^11 p/spill on T6.
For this commissioning phase we need > 100 × 10^11 p/spill on T6.
- ECAL calibration with electron beam,
- LAS trigger HV scan,
- trigger hodoscope efficiency measurement,
- data rate test and balancing.
For physics we need up to 150 × 10^11 (may be tuned to optimize the rate).

Supercycles, Wobbling, Target intensities

See INDICO agenda for details

AOB