Publications
Publication Information
Title | A Threshold Gas Cerenkov Detector for the Spin Asymmetries of the Nucleon Experiment |
Authors | Whitney Armstrong, Seonho Choi, Edward Kaczanowicz, Oleksandr Lukhanin, Zein-Eddine Meziani, Bradley Sawatzky |
JLAB number | JLAB-PHY-15-2020 |
LANL number | arXiv:1503.03138 |
Other number | DOE/OR/23177-3320 |
Document Type(s) | (Journal Article) |
Associated with EIC: | No |
Supported by Jefferson Lab LDRD Funding: | No |
Journal Compiled for Nuclear Instruments & Methods in Physics Research, Section A Volume 804 Page(s) 118-126 Refereed | |
Publication Abstract: | We report on the design, construction, commissioning, and performance of a threshold gas \v{C}erenkov counter in an open configuration, which operates in a high luminosity environment and produces a high photo-electron yield. Part of a unique open geometry detector package known as the Big Electron Telescope Array, this \v{C}erenkov counter served to identify scattered electrons and reject produced pions in an inclusive scattering experiment known as the Spin Asymmetries of the Nucleon Experiment E07-003 at the Thomas Jefferson National Accelerator Facility (TJNAF) also known as Jefferson Lab. The experiment consisted of a measurement of double spin asymmetries A_|| and A_perp of a polarized electron beam impinging on a polarized ammonia target. The \v{C}erenkov counter's performance is characterised by a yield of about 20 photoelectrons per electron or positron track. Thanks to this large number of photoelectrons per track, the \v{C}erenkov counter had enough resolution to identify electron-positron pairs from the conversion of photons resulting mainly from pi0 decays. |
Experiment Numbers: | E07-003 |
Group: | Hall A |
Document: | |
DOI: | http://dx.doi.org/10.1016/j.nima.2015.09.050 |
Accepted Manuscript: | |
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