Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab
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 integr...
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| Veröffentlicht in: | J. Phys.: Conf. Ser 2011-09, Vol.312 (5), p.052018-6 |
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| container_title | J. Phys.: Conf. Ser |
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| creator | Parno, D Friend, M Benmokhtar, F Franklin, G Michaels, R Nanda, S Quinn, B Souder, P |
| description | 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. |
| doi_str_mv | 10.1088/1742-6596/312/5/052018 |
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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. 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| subjects | ASYMMETRY Beams (radiation) COMMISSIONING DESIGN ELECTRON BEAMS ELECTRONS Fabry-Perot interferometers Holes NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEAR STRUCTURE NUCLEONS PHOTONS Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Polarimeters POLARIMETRY POLARIZATION Running |
| title | Preliminary Results from Integrating Compton Photon Polarimetry in Hall A of Jefferson Lab |
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