1. A high precision Fabry-Perot cavity polarimeter at HERA
- Author
-
S. Kurbasov, Matthew Beckingham, F. Zomer, R. Chiche, S. Baudrand, V. Soskov, C. Pascaud, P. Deck-Betinelli, Stefan Schmitt, N. Meyners, V. Brisson, N. Coppola, M. Authier, T. Behnke, A. Reboux, Laurent Pinard, Gang Li, M. Jacquet, Y. Queinec, Daniel Pitzl, Zhiqing Zhang, M. Bouchel, Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département d'Ingénierie des Systèmes (ex SIS) (DIS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)
- Subjects
Physics - Instrumentation and Detectors ,Measure (physics) ,Phase (waves) ,FOS: Physical sciences ,Physics::Optics ,Electron ,01 natural sciences ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,Optics ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,ddc:610 ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,Instrumentation ,Mathematical Physics ,Physics ,010308 nuclear & particles physics ,business.industry ,Polarimeter ,Instrumentation and Detectors (physics.ins-det) ,HERA ,Intensity (physics) ,Cathode ray ,Physics::Accelerator Physics ,business ,Fabry–Pérot interferometer - Abstract
A Fabry-Perot cavity polarimeter, installed in 2003 at HERA for the second phase of its operation, is described. The cavity polarimeter was designed to measure the longitudinal polarisation of the HERA electron beam with high precision for each electron bunch spaced with a time interval of 96ns. Within the cavity the laser intensity was routinely enhanced up to a few kW from its original value of 0.7W in a stable and controllable way. By interacting such a high intensity laser beam with the HERA electron beam it is possible to measure its polarisation with a relative statistical precision of 2% per bunch per minute. Detailed systematic studies have also been performed resulting in a systematic uncertainty of 1%., 28 pages, 16 figures
- Published
- 2010
- Full Text
- View/download PDF