A Proposal to Operate the COUPP-60 Bubble Chamber at SNOLAB

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Bubble chambers are promising devices for the detection of WIMP dark matter, due to their easy scalability to large target masses and insensitivity to background {gamma} and {beta} radiation. The COUPP collaboration has constructed small chambers which have achieved competitive sensitivity for spin-dependent WIMP-nucleon scattering. A new chamber, COUPP-60, containing 60-kg of CF{sub 3}I target liquid, has been built and is being commissioned at Fermilab. We propose to move this detector to SNOLAB after completing tests in a shallow underground site at Fermilab. At SNOLAB, we expect the sensitivity of the experiment to be determined by the level of {alpha}emitting ... continued below

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18 pages

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Collar, Juan; Dahl, C.Eric; Fustin, Drew; Goetzke, Luke; Riley, Nathan; Schimmelpfennig, Hannes et al. August 1, 2009.

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Bubble chambers are promising devices for the detection of WIMP dark matter, due to their easy scalability to large target masses and insensitivity to background {gamma} and {beta} radiation. The COUPP collaboration has constructed small chambers which have achieved competitive sensitivity for spin-dependent WIMP-nucleon scattering. A new chamber, COUPP-60, containing 60-kg of CF{sub 3}I target liquid, has been built and is being commissioned at Fermilab. We propose to move this detector to SNOLAB after completing tests in a shallow underground site at Fermilab. At SNOLAB, we expect the sensitivity of the experiment to be determined by the level of {alpha}emitting contamination in the target liquid. If we achieve state-of-the-art levels of {alpha} emitting contamination, we will improve current sensitivity by approximately four orders of magnitude beyond our published limits, to the region of 10{sup -4} pb for a 30 GeV WIMP interacting by spin-dependent couplings to the proton. This will allow a first exploration of the phase space favored by supersymmetric models in this regime.

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18 pages

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  • Report No.: FERMILAB-PROPOSAL-0999
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/993873 | External Link
  • Office of Scientific & Technical Information Report Number: 993873
  • Archival Resource Key: ark:/67531/metadc1012484

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  • August 1, 2009

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 25, 2017, 4:12 p.m.

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Collar, Juan; Dahl, C.Eric; Fustin, Drew; Goetzke, Luke; Riley, Nathan; Schimmelpfennig, Hannes et al. A Proposal to Operate the COUPP-60 Bubble Chamber at SNOLAB, report, August 1, 2009; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc1012484/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.