Important contacts
Calling from outside CERN:
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COMPASS 2022 run
SIDIS on transversely polarised deuterons
Introduction
The run is aimed at Semi-Inclusive Deep-Inelastic Scattering (SIDIS) of muons off transversely polarised 6LiD target, as described in our proposal or in this talk. The experiment is located in the Experimental Hall North 2 (EHN2), building 888, on the Prévessin site of CERN.
News
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Run schedule
| 11.04. | Commissioning | First beams for NA commissioning. |
| 25.04. | Beam to NA for physics | NA64mu main user; possible spectrometer partial commissioning with beam. |
| 16-17.05. | Changover | Changeover from NA64mu to COMPASS. No beam until Tuesday 17.05 at 18:00. Survey. |
| 17.05. | First beam tuning | First beam tuning and steering. |
| 18-19.05. | AMBER tests | Days dedicated to AMBER p-bar production tests. |
| 20.05. | Commissioning | First day with COMPASS as exclusive user of the beam. Detector and trigger commissioning with muon/hadron beam. |
| 25.05. | Survey | During the MD, for the detectors not surveyed on 16-17/05. |
| 01.06. | Goal | Start of the data taking for physics. |
| 07.06. | W01 | Start of the first data taking period. |
| 22.06. | W02 | Start of the second data taking period. |
| 06.07. | W03 | Start of the third data taking period. |
| 20.07. | W04 | Start of the 4th data taking period. |
| XX.11. | End of the run |
Useful links
- COMPASS experiment
- Main page
- COMPASS Team on Mattermost (an invite link can be found in Contacts or Shifts)
- Electronic logbook
- COMPASS Wiki
- Wiki page with shift instructions
- Safety checklist
- Online beam monitor
- Accelerators
- CERN in COVID times
- Summary from HSE
- Conditions to enter Switzerland or France
- Users office information
- Pooled PCR testing remains available until the end of April in order to monitor the impact of moving to Level 1 – Green, and to evaluate the potential for further evolution of the measures in place. Info, You are encouraged to make use of the offer, and can book your self-test through sign up on PLAMED.
- If you have COVID symptoms, do not come on site. Contact the Medical Service at +41 22 766 7777 to arrange for an RT-PCR test at the Proxilis laboratory in Meyrin.
- If you are coming from a high-risk zone (as defined by either France or Switzerland), you have to fill this form and contact the technical coordinator or spokesperson (in advance!)
- Otherwise, no special procedure is currently needed to enter the site (you just need to do the online COVID training).
- CERN Hostel in Saint Genis can be booked as usually (web booking). There is a special quarantine floor.
- CERN Hostel in Meyrin can be booked filling a form (fill the technical coordinator or spokesperson as the guarantor). People in quarantine cannot stay in Meyrin.
- All restaurants and cafeterias remain closed at weekends and have limited opening hours on workdays.
- Vaccination certificates issued outside the EU can be converted into the French health pass.
- Obtaining personal (passive) dosimeter
- CERN Shuttle service
Experimental setup
COMPASS setup, upstream half
COMPASS setup, downstream half
The experimental setup consists of a beam telescope, solid-state transversely 6LiD target and a two-stage magnetic spectrometer. The spectrometer has wide angular coverage and robust tracking. Particle identification is ensured by muon filters and a RICH detector. It contains also electromagnetic and hadronic calorimeters.
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