Design and construction of a high-energy photon polarimeter

Abstract

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. 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 ${\Sigma }_A$ for the device using a 75 $\mu \mathrm{m}$ beryllium converter foil is about 0.2, with a relative systematic uncertainty in ${\Sigma }_A$ of 1.5%.

arXiv comment13 pages, 17 figures

References in corpus (3)

• Hybrid Mesons
• Measurement of the beam asymmetry $\Sigma$ for ${\pi }^0$ and $\eta$ photoproduction on the proton at $E_{\gamma }=9$ GeV
• First Results from The GlueX Experiment

Cited by in corpus (12)

• The GlueX Beamline and Detector
• Beam Asymmetry $\mathbf{\Sigma }$ for the Photoproduction of $\eta$ and ${\eta }^{\prime }$ Mesons at ${\mathbf{E}}_{\gamma }=8.8$GeV
• Measurement of Spin-Density Matrix Elements in $\rho (770)$ Production with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8\text{GeV}$
• Light-Meson Spectroscopy at GlueX
• Measurement of beam asymmetry for ${\pi }^{-}{\Delta }^{++}$ photoproduction on the proton at $E_{\gamma }$=8.5 GeV
• Measurement of the Photon Beam Asymmetry in $\vec{\gamma }p\to K^{+}{\Sigma }^0$ at $E_{\gamma }=8.5$ GeV
• Measurement of Spin Density Matrix Elements in $\Lambda (1520)$ Photoproduction at 8.2-8.8 GeV
• Upper Limit on the Photoproduction Cross Section of the Spin-Exotic ${\pi }_1(1600)$
• Spin-Density Matrix Elements for Vector Meson Photoproduction at GlueX
• Searches for Exotic Hadrons at GlueX
• Measurement of Spin-Density Matrix Elements in $\varphi (1020)\to K_S^0{K}_L^0$ Photoproduction with a Linearly Polarized Photon Beam at $E_{\gamma }=8.2-8.8$ GeV
• Beam Asymmetries ($\Sigma$) for ${\pi }^0$, $\eta$ and ${\eta }^{\prime }$ in Photoproduction at GlueX