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Design and construction of a high-energy photon polarimeter

Journal Article · · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of Connecticut, Storrs, CT (United States)
+ Show Author Affiliations

Here, we report on the design and construction of a high-energy photon polarimeter for measuring the degree of polarization of a linearly-polarized photon beam. The photon polarimeter uses the process of pair production on an atomic electron (triplet production). The azimuthal distribution of scattered atomic electrons following triplet production yields information regarding the degree of linear polarization of the incident photon beam. Furthermore, the polarimeter, operated in conjunction with a pair spectrometer, uses a silicon strip detector to measure the recoil electron distribution resulting from triplet photoproduction in a beryllium target foil. The analyzing power ΣA for the device using a 75 μm beryllium converter foil is about 0.2, with a relative systematic uncertainty in ΣA of 1.5%.

Research Organization:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
AC05-06OR23177
OSTI ID:
1372263
Alternate ID(s):
OSTI ID: 1550306
Report Number(s):
JLAB-PHY--17-2425; DOE/OR/23177--4164; PII: S0168900217305715
Journal Information:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Journal Name: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment Journal Issue: C Vol. 867; ISSN 0168-9002
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (8)

Pair Production by Photons on Electrons journal August 1967
Pair production in the field of atomic electrons journal January 1981
Pair spectrometer hodoscope for Hall D at Jefferson Lab
  • Barbosa, F.; Hutton, C.; Sitnikov, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 795 https://doi.org/10.1016/j.nima.2015.06.012
journal September 2015
Hybrid mesons journal May 2015
Atomic form factors, incoherent scattering functions, and photon scattering cross sections journal July 1975
Pair Production by Photons on Electrons journal August 1967
Pair production in the field of atomic electrons journal January 1981
Measurement of the beam asymmetry Σ for π 0 and η photoproduction on the proton at E γ = 9 GeV journal April 2017

Cited By (1)

Beam asymmetry Σ for the photoproduction of η and η ′ mesons at E γ = 8.8 GeV journal November 2019

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Beam characteristics
Polarization measurement
Polarized photon beam
Triplet photoproduction