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Title: A radial time projection chamber for α detection in CLAS at JLab

A new Radial Time Projection Chamber (RTPC) was developed at the Jefferson Laboratory to track low-energy nuclear recoils to measure exclusive nuclear reactions, such as coherent deeply virtual Compton scattering and coherent meson production off 4He. In 2009, we carried out these measurements using the CEBAF Large Acceptance Spectrometer (CLAS) supplemented by the RTPC positioned directly around a gaseous 4He target, allowing a detection threshold as low as 12 MeV for 4He. This work discusses the design, principle of operation, calibration methods and performances of this RTPC.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [5] ;  [6] ;  [5] ;  [5] ;  [7] ;  [8] ;  [2] ;  [4] ;  [6] ;  [5] ;  [5] ;  [9] ;  [10] ;  [6] ;  [11]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. Paris-Sud, CNRS/IN2P3, Orsay (France). Inst. of Nuclear Physics
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. National Inst. for Nuclear Physics (INFN), Genova (Italy)
  6. Old Dominion Univ., Norfolk, VA (United States)
  7. Argonne National Lab. (ANL), Argonne, IL (United States); Federico Santa María Technical Univ., Valparaiso (Chile)
  8. Mississippi State Univ., Mississippi State, MS (United States)
  9. Univ. of Chicago, IL (United States)
  10. Univ. of Grenoble, CNRS/IN2P3 (France). Lab. of Subatomic Physics and Cosmology
  11. Univ. Paris-Sud, CNRS/IN2P3, Orsay (France). Inst. of Nuclear Physics; Univ. of Grenoble, CNRS/IN2P3 (France). Lab. of Subatomic Physics and Cosmology
Publication Date:
Grant/Contract Number:
AC02-06CH11357; AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 898; Journal Issue: C; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Centre for Scientific Research (CNRS), Strasbourg (France); National Inst. for Nuclear Physics (INFN) (Italy); Consulate General of France in Jerusalem
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Alpha particles; DVCS; Gas electron multipliers; Nuclear physics; Time projection chamber
OSTI Identifier:
1438600