[Triumf-seminars] TRIUMF Seminar today at 11:00

postmaster at admin.triumf.ca postmaster at admin.triumf.ca
Tue Feb 5 05:00:00 PST 2008


Date/Time: Tue 2008-02-05 at 11:00

Location:  ISAC-II Video 223   

Speaker:   Gabriella Sciolla (Massachusetts Institute of Technology)

Title:     DM-TPC: a novel approach to directional Dark Matter detection

Abstract: Directional detection of dark matter can provide unambiguous observation of dark matter (DM) interactions even in presence of insidious backgrounds. The DM-TPC collaboration is developing a detector with the goal of measuring the direction and sense ("head-tail") of nuclear recoils produced in spin-dependent DM interactions. The detector consists of a low pressure TPC with optical readout filled with CF4 gas at low pressure. A collision between a WIMP with a gas molecule results in a nucleus recoil of about 1 mm. The measurement of the energy loss along the recoil allows us to determine the sense and the direction of the recoil. Results from a prototype detector operated in a low-energy neutron beam clearly demonstrate the suitability of this approach to measure directionality. In particular, the first observation of the "head-tail" effect for low-energy neutrons had been recently published  by our Collaboration. A full-scale (~1m^3) module is now being built. This detector, which will be operated underground in 2008-2009, will allow us to set limits on spin-dependent Dark Matter interactions using a directional detector. The expected sensitivity of this experiment  will be discussed in this talk.

Stimulants available 15 minutes before the talk.

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