DMTPC: Dark matter detection with directional sensitivity

Details DMTPC: Dark matter detection with directional sensitivity DMTPC: Dark matter detection with directional sensitivity

2010-12-17

arxiv.org/abs/1012.3912v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Conference proceedings from the Identification of Dark Matter 2010, Montpellier, France. To be published by SISSA as PoS(IDM20

Scientific paper

The Dark Matter Time Projection Chamber (DMTPC) experiment uses CF_4 gas at low pressure (0.1 atm) to search for the directional signature of Galactic WIMP dark matter. We describe the DMTPC apparatus and summarize recent results from a 35.7 g-day exposure surface run at MIT. After nuclear recoil cuts are applied to the data, we find 105 candidate events in the energy range 80 - 200 keV, which is consistent with the expected cosmogenic neutron background. Using this data, we obtain a limit on the spin-dependent WIMP-proton cross-section of 2.0 \times 10^{-33} cm^2 at a WIMP mass of 115 GeV/c^2. This detector is currently deployed underground at the Waste Isolation Pilot Plant in New Mexico.

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