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    Construction of triple-GEM detectors using commercially manufactured large GEM foils

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    1612.03776v1.pdf
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    Genre
    Pre-print
    Date
    2017-10-16
    Author
    Posik, M
    Surrow, B
    Subject
    physics.ins-det
    physics.ins-det
    hep-ex
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/4866
    
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    DOI
    10.1109/NSSMIC.2016.8069743
    Abstract
    © 2016 IEEE. Many experiments are currently using or proposing to use large area GEM foils in their detectors, which is creating a need for commercially available GEM foils. Currently CERN is the only main distributor of large GEM foils, however with the growing interest in GEM technology keeping up with the increasing demand for GEMs will be difficult. Thus the commercialization of GEMs up to 50 × 50 cm2 has been established by Tech-Etch Inc. of Plymouth, MA, USA using the single-mask technique. The electrical performance and optical quality of the single-mask GEM foils have been found to be on par with those produced by CERN. The next critical step towards validating the Tech-Etch GEM foils is to test their performance under physics conditions. These measurements will allow us to quantify and compare the gain and efficiency of the detector to other triple-GEM detectors. This will be done by constructing several single-mask triple-GEM detectors, using foils manufactured by Tech-Etch, which follow the design used by the STAR Forward GEM Tracker (FGT). The stack is formed by gluing the foils to the frames and then gluing the frames together. The stack also includes a Tech-Etch produced high voltage foil and a 2D r - φ readout foil. While one of the triple-GEM detectors will be built identically to the STAR FGT, the others will investigate ways in which to further decrease the material budget and increase the efficiency of the detector by incorporating perforated Kapton spacer rings rather than G10 spacing grids to reduce the dead area of the detector. The materials and tooling needed to assemble the triple-GEM detectors have been acquired. The GEM foils have been electrically tested, and a handful have been optically scanned. We found these results to be consistent with GEM foils produced by CERN. With the success of these initial tests, construction of the triple-GEM detectors is now under way.
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    IEEE
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    2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/4848
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