Aligning the CMS muon chambers with the muon alignment system during an extended cosmic ray run
Abstract
The alignment system for the muon spectrometer of the CMS detector comprises three independent subsystems of optical and analog position sensors. It aligns muon chambers with respect to each other and to the central silicon tracker. System commissioning at full magnetic field began in 2008 during an extended cosmic ray run. The system succeeded in tracking muon detector movements of up to 18mm and rotations of several milliradians under magnetic forces. Depending on coordinate and subsystem, the system achieved chamber alignment precisions of 140–350 µm and 30–200 µrad, close to the precision requirements of the experiment. Systematic errors on absolute positions are estimated to be 340–590 µm based on comparisons with independent photogrammetry measurements.
Additional Information
© 2010 IOP Publishing Ltd and SISSA. Received: IOP Publishing Ltd and SISSA; Accepted: January 21, 2010; Published: March 19, 2010. We thank the technical and administrative staff at CERN and other CMS Institutes, and acknowledge support from: FMSR (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES (Croatia); RPF (Cyprus); Academy of Sciences and NICPB (Estonia); Academy of Finland, ME, and HIP (Finland); CEA and CNRS/IN2P3 (France); BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NKTH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland); INFN (Italy); NRF (Korea); LAS (Lithuania); CINVESTAV, CONACYT, SEP, and UASLP-FAI (Mexico); PAEC (Pakistan); SCSR (Poland); FCT (Portugal); JINR (Armenia, Belarus, Georgia, Ukraine, Uzbekistan); MST and MAE (Russia); MSTDS (Serbia); MICINN and CPAN (Spain); Swiss Funding Agencies (Switzerland); NSC (Taipei); TUBITAK and TAEK (Turkey); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from the Marie-Curie IEF program (European Union); the Leventis Foundation; the A. P. Sloan Foundation; and the Alexander von Humboldt Foundation.Attached Files
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Additional details
Identifiers
- Eprint ID
- 21939
- Resolver ID
- CaltechAUTHORS:20110131-132113523
Related works
- Describes
- http://arxiv.org/abs/0911.4770 (URL)
Funding
- FMSR (Austria)
- FNRS (Belgium)
- CNPq (Brazil)
- MES (Bulgaria)
- CERN (China)
- CAS (China)
- COLCIEN-CIAS (Colombia)
- MSES (Croatia)
- RPF (Cyprus)
- Academy of Sciences (Estonia)
- Academy of Finland (Finland)
- CEA (France)
- BMBF (Germany)
- GSRT (Greece)
- OTKA (Hungary)
- DAE (India)
- IPM (Iran)
- SFI (Ireland)
- INFN (Italy)
- NRF (Korea)
- LAS (Lithuania)
- CINVESTAV (Mexico)
- PAEC (Pakistan)
- SCSR (Poland)
- FCT (Portugal)
- JINR (Armenia)
- MST (Russia)
- MSTDS (Serbia)
- MICINN (Spain)
- Swiss Funding Agencies (Switzerland)
- NSC (Taipei)
- TUBITAK (Turkey)
- STFC (United Kingdom)
- Department of Energy (DOE)
- European Union
- Leventis Foundation
- A. P. Sloan Foundation
- Alexander von Humboldt Foundation
- FWO (Belgium)
- CAPES (Brazil)
- FAPERJ (Brazil)
- FAPESP (Brazil)
- MoST (China)
- NSFC (China)
- NICPB (Estonia)
- ME
- HIP (Finland)
- CNRS/IN2P3 (France)
- DFG (Germany)
- HGF (Germany)
- NKTH (Hungary)
- DST (India)
- CONACyT (Mexico)
- SEP (Mexico)
- UASLP-FAI (Mexico)
- JINR (Belarus)
- JINR (Georgia)
- JINR (Ukraine)
- JINR (Uzbekistan)
- MAE (Russia)
- CPAN (Spain)
- TAEK (Turkey)
- NSF
Dates
- Created
-
2011-02-01Created from EPrint's datestamp field
- Updated
-
2022-07-12Created from EPrint's last_modified field