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

Collar, Juan ; Dahl, C.Eric ; Fustin, Drew ; Goetzke, Luke ; Riley, Nathan ; Schimmelpfennig, Hannes ; Szydagis, Matthew ; /KICP, Chicago ; Behnke, Ed ; Hinnefeld, Henry ; Levine, Ilan ; Palenchar, Andrea ; /Indiana U., South Bend /Fermilab

关键词: BUBBLE CHAMBERS;    EXPERIMENT PLANNING;    DETECTION;    NONLUMINOUS MATTER;    PHASE SPACE;    CARBON FLUORIDES;    SENSITIVITY;    SUPERSYMMETRY;    MATHEMATICAL MODELS Accelerators;   

DOI  :  10.2172/993873
RP-ID  :  FERMILAB-PROPOSAL-0999
PID  :  OSTI ID: 993873
Others  :  TRN: US1100065

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

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.