Improved measurement of the head-tail effect in nuclear recoils

Details Improved measurement of the head-tail effect in nuclear recoils Improved measurement of the head-tail effect in nuclear recoils

2008-01-17

arxiv.org/abs/0801.2687v1

J.Phys.Conf.Ser.120:042030,2008

Astronomy and Astrophysics

Astrophysics

Contributed to the International Conference on Topics in Astroparticle and Underground Physics (TAUP) 2007, Sendai, Japan (3 p

Scientific paper

10.1088/1742-6596/120/4/042030

We present new results with a prototype detector that is being developed by the DMTPC collaboration for the measurement of the direction tag (head-tail) of dark matter wind. We use neutrons from a Cf-252 source to create low-momentum nuclear recoils in elastic scattering with the residual gas nuclei. The recoil track is imaged in low-pressure time-projection chamber with optical readout. We measure the ionization rate along the recoil trajectory, which allows us to determine the direction tag of the incoming neutrons.

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