Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab

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A wide range of nucleon and nuclear structure experiments in Jefferson Lab's Hall A require precise, continuous measurements of the polarization of the electron beam. In our Compton polarimeter, electrons are scattered off photons in a Fabry-Perot cavity; by measuring an asymmetry in the integrated signal of the scattered photons detected in a GSO crystal, we can make non-invasive, continuous measurements of the beam polarization. Our goal is to achieve 1% statistical error within two hours of running. We discuss the design and commissioning of an upgrade to this apparatus, and report preliminary results for experiments conducted at beam energies ... continued below

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052018

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D. Parno, M. Friend, F. Benmokhtar, G. Franklin, R. Michaels, S. Nanda, B. Quinn, P. Souder September 1, 2011.

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A wide range of nucleon and nuclear structure experiments in Jefferson Lab's Hall A require precise, continuous measurements of the polarization of the electron beam. In our Compton polarimeter, electrons are scattered off photons in a Fabry-Perot cavity; by measuring an asymmetry in the integrated signal of the scattered photons detected in a GSO crystal, we can make non-invasive, continuous measurements of the beam polarization. Our goal is to achieve 1% statistical error within two hours of running. We discuss the design and commissioning of an upgrade to this apparatus, and report preliminary results for experiments conducted at beam energies from 3.5 to 5.9 GeV and photon rates from 5 to 100 kHz.

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052018

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  • Journal Name: J. Phys.: Conf. Ser; Journal Volume: 312; Journal Issue: 5; Conference: INPC 2010, July 4-9 2010, Vancouver, Canada

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  • Report No.: JLAB-PHY-10-1245
  • Report No.: DOE/OR/23177-2010
  • Report No.: arXiv:1106.4851
  • Grant Number: AC05-06OR23177
  • DOI: 10.1088/1742-6596/312/5/052018 | External Link
  • Office of Scientific & Technical Information Report Number: 1034432
  • Archival Resource Key: ark:/67531/metadc834328

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  • September 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:59 p.m.

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D. Parno, M. Friend, F. Benmokhtar, G. Franklin, R. Michaels, S. Nanda, B. Quinn, P. Souder. Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab, article, September 1, 2011; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc834328/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.