DMTPC: A dark matter detector with directional sensitivity

Details DMTPC: A dark matter detector with directional sensitivity DMTPC: A dark matter detector with directional sensitivity

2009-07-03

arxiv.org/abs/0907.0675v1

AIP Conf.Proc.1182:276-279,2009

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 2 figures, proceedings for the CIPANP 2009 conference, May 26-31, 2009

Scientific paper

10.1063/1.3293799

By correlating nuclear recoil directions with the Earth's direction of motion through the Galaxy, a directional dark matter detector can unambiguously detect Weakly Interacting Massive Particles (WIMPs), even in the presence of backgrounds. Here, we describe the Dark Matter Time-Projection Chamber (DMTPC) detector, a TPC filled with CF4 gas at low pressure (0.1 atm). Using this detector, we have measured the vector direction (head-tail) of nuclear recoils down to energies of 100 keV with an angular resolution of <15 degrees. To study our detector backgrounds, we have operated in a basement laboratory on the MIT campus for several months. We are currently building a new, high-radiopurity detector for deployment underground at the Waste Isolation Pilot Plant facility in New Mexico.

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