Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 782, Issue -, Pages 77-86Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2015.02.017
Keywords
GEM; Super Bigbite Spectrometer; High rate detectors; Tracking detectors; Spatial resolution
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Funding
- Jefferson Science Associates, LLC under U.S. DOE [DE-AC05-06OR23177]
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We report on the R&D effort in the design and construction of a large size Gas Electron Multiplier (GEM) for the Proton Polarimeter Back Tracker (BT) of the Super Bigbite Spectrometer (SBS) in Hall A at Thomas Jefferson National Laboratory (JLab). The SBS BT GEM trackers consist of two sets of five large GEM chambers of size GO x 200 cm(2). The GEM chamber is a vertical stack of four GEM modules, each with an active area of GO x 50 cm(2). We have built and tested several prototypes and the construction of GEM modules for SBS BT is ongoing. We describe in this paper the design and construction of the GEM module prototype as well as the preliminary results on performance from tests carried out in our detector lab and during test beam at Fermi National Laboratory (Fermilab). (C) 2015 Elsevier B.V. All rights reserved.
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