COMPASS 2022 run

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

Important contacts

Calling from outside CERN:

Landline numbers (7....) or CERNphone (6....): dial +41 22 76 plus all five digits.
Mobile numbers (16....): dial +41 75 411 plus last four digits.

The data are taken from the CMAD2012 MySQL database on pccodb00 and can be updated there.

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Responsibility	Name	Phone numbers
Control room (892-R-D10)		7 8058
DEXSO/Gas	TESSAROTTO Fulvio	16 4826
Deputy run coordinator	PEŠEK Michael	16 3935
Deputy run coordinator	PIRES Christophe	6 6506
EHN2 (888) TSO	RAE Bastien	16 7388
EXSO	LEVORATO Stefano	16 4850
Run Coordinator	MARTIN Anna	16 0810
Spokesperson	PARSAMYAN Bakur	16 4463
Spokesperson	TESSAROTTO Fulvio	16 4826
Technical Coordinator	LEVORATO Stefano	16 7431, 16 4850
Week coordinator		16 4863
SPS Control Room (CCC)		7 7500
Polarised Target Coordinator	DOSHITA Norihiro	16 8996
Polarised target expert	PEŠEK Michael	16 3935
DAQ	FROLOV Vladimir	16 5994, 6 5098
DCS	PIRES Christophe	16 4872, 6 6506

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.