Rejection of Electronic Recoils with the DMTPC Dark Matter Search
Name
Lopez-2012-Rejection of Electro.pdf
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2.76 MB
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Author(s)
Lopez, Jeremy Paul
Ahlen, S.
Battat, James
Caldwell, T.
Chernicoff, M.
Dujmic, Denis
Dushkin, A.
Fedus, William B.
Golub, F.
Henderson, Shawn Wesley
Date Issued
October 2012
Journal
Physics Procedia
Publisher
Elsevier
Citation
Lopez, J.P., S. Ahlen, J. Battat, T. Caldwell, M. Chernicoff, C. Deaconu, D. Dujmic, et al. “Rejection of Electronic Recoils with the DMTPC Dark Matter Search.” Physics Procedia 37 (2012): 575–582.
Version
Final published version
Abstract
The Dark Matter Time Projection Chamber (DMTPC) collaboration is developing a low-pressure gas TPC for detecting WIMP-nucleon interactions. DMTPC detectors use optical readout with CCD cameras to search for the daily modulation of the directional signal of the dark matter wind. An analysis of several charge readout channels has been developed to obtain additional information about ionization events in the detector. In order to reach sensitivities required for the WIMP detection, the detector needs to minimize backgrounds from electron recoils. This article shows that by using the readout of charge signals in addition to CCD readout, a preliminary statistics-limited 90% C.L. upper limit on the γ and e[superscript −] rejection factor of 5.6 × 10[superscript −6] is obtained for energies between 40 keV[subscript ee] and 200 keV[subscript ee].
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
MIT Nuclear Reactor Laboratory
MIT Kavli Institute for Astrophysics and Space Research
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DOI of Published Version
https://doi.org/10.1016/j.phpro.2012.03.716
