Journal articles
In situ measurement of the electron drift velocity for upcoming directional Dark Matter detectors
Abstract : The knowledge of the electron drift velocity is a key issue for directional detection of galactic Dark Matter as it is used for the 3D track reconstruction. The aim of this paper is to present a dedicated method for the measurement of the electron drift velocity with the MIMAC detector, using a pure CF4 gas and a CF4 + CHF3 gas mixture. This new measurement method uses high energy alpha tracks from a collimated source and includes a profile likelihood method associated to a modeling of the signal induced on the grid. In particular, we show that adding CHF3 allows us to lower the electron drift velocity while keeping almost the same Fluorine content of the gas mixture. We show that the drift velocity at 50 mbar is reduced by a factor of about 5 when considering 30% of CHF3, allowing to improve the three-dimensional track reconstruction.
http://hal.in2p3.fr/in2p3-00821779
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, May 13, 2013 - 8:43:06 AM
Last modification on : Thursday, November 19, 2020 - 12:58:47 PM
Contributor : Emmanuelle Vernay <>
Submitted on : Monday, May 13, 2013 - 8:43:06 AM
Last modification on : Thursday, November 19, 2020 - 12:58:47 PM
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