Absolute momentum calibration of the HARP TPC

6533b82dfe1ef96bd1291dc2

RESEARCH PRODUCT

Absolute momentum calibration of the HARP TPC

C. N. Booth Malcolm Ellis E. Di Capua P. Novella N. G. Polukhina F. J. P. Soler Alexey Krasnoperov A. Kayis-topaksu L. Coney M. G. Catanesi A. Blondel Simone Gilardoni D. W. Schmitz G. Giannini V. Tereschenko M. C. Morone Ioannis Papadopoulos V. Palladino S. Giani C. Meurer M. Bonesini S.a. Bunyatov D. Kolev V. Grichine Vladimir Ivanchenko U. Dore Silvia Borghi A. Bagulya M. Sorel L. Howlett G.b. Mills J.s. Graulich Petar Temnikov G. Prior A. Grossheim C. Wiebusch Fr Pastore A. De Santo M. Mezzetto J Martín–albo S. Piperov M. Apollonio A. Artamonov A. Grant Domizia Orestano P. Zucchelli Ilya Tsukerman J Burguet–castell E. Tcherniaev E. Radicioni G. Vidal–sitjes R. Tsenov G.d. Barr A. Guglielmi A. Cervera Villanueva Mikhail Kirsanov J. J. Gómez Cadenas Rob Edgecock V. Serdiouk P. Gorbunov P. Chimenti Ghislain Grégoire D. Gibin B. A. Popov M. Chizhov U. Gastaldi R. Schroeter C Göß Ling Federico Ferri L. Tortora F. Bobisut J. Dumarchez A. Tonazzo M. Bogomilov Rob Veenhof J. Panman

subject

Physics - Instrumentation and Detectors Physics::Instrumentation and Detectors Time projection chambers FOS: Physical sciences Detector alignment and calibration methods (lasers sources particle-beams)ddc:500.2 Tracking (particle physics)01 natural sciences Particle detector Particle identification Nuclear physics 0103 physical sciences Calibration [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Detector alignment and calibration methods Detectors and Experimental Techniques 010306 general physics Nuclear Experiment Instrumentation Mathematical Physics HARP Physics Momentum (technical analysis)Spectrometer 010308 nuclear & particles physics Detector Settore FIS/01 - Fisica Sperimentale Física Instrumentation and Detectors (physics.ins-det)Settore FIS/07 - Fisica Applicata(Beni Culturali Ambientali Biol.e Medicin)

description

In the HARP experiment the large-angle spectrometer is using a cylindrical TPC as main tracking and particle identification detector. The momentum scale of reconstructed tracks in the TPC is the most important systematic error for the majority of kinematic bins used for the HARP measurements of the double-differential production cross-section of charged pions in proton interactions on nuclear targets at large angle. The HARP TPC operated with a number of hardware shortfalls and operational mistakes. Thus it was important to control and characterize its momentum calibration. While it was not possible to enter a direct particle beam into the sensitive volume of the TPC to calibrate the detector, a set of physical processes and detector properties were exploited to achieve a precise calibration of the apparatus. In the following we recall the main issues concerning the momentum measurement in the HARP TPC, and describe the cross-checks made to validate the momentum scale. As a conclusion, this analysis demonstrates that the measurement of momentum is correct within the published precision of 3%.

year	journal	country	edition	language
2008-01-01

10.1088/1748-0221/3/04/p04007 http://cds.cern.ch/record/1103544