Angular resolution of the MIMAC Dark Matter directional detector. (arXiv:1903.02159v1 [physics.ins-det])
<a href="http://arxiv.org/find/physics/1/au:+Tao_Y/0/1/0/all/0/1">Y. Tao</a>, <a href="http://arxiv.org/find/physics/1/au:+Moric_I/0/1/0/all/0/1">I. Moric</a>, <a href="http://arxiv.org/find/physics/1/au:+Tao_C/0/1/0/all/0/1">C. Tao</a>, <a href="http://arxiv.org/find/physics/1/au:+Santos_D/0/1/0/all/0/1">D. Santos</a>, <a href="http://arxiv.org/find/physics/1/au:+Sauzet_N/0/1/0/all/0/1">N. Sauzet</a>, <a href="http://arxiv.org/find/physics/1/au:+Couturier_C/0/1/0/all/0/1">C. Couturier</a>, <a href="http://arxiv.org/find/physics/1/au:+Guillaudin_O/0/1/0/all/0/1">O. Guillaudin</a>, <a href="http://arxiv.org/find/physics/1/au:+Muraz_J/0/1/0/all/0/1">J.F. Muraz</a>, <a href="http://arxiv.org/find/physics/1/au:+Naraghi_F/0/1/0/all/0/1">F. Naraghi</a>, <a href="http://arxiv.org/find/physics/1/au:+Zhou_N/0/1/0/all/0/1">N. Zhou</a>, <a href="http://arxiv.org/find/physics/1/au:+Busto_J/0/1/0/all/0/1">J. Busto</a>
Dark Matter (DM) in the form of Weakly Interacting Massive Particles (WIMPs)
has been searched for since the 1980’s. WIMPs interact with nuclei of the
detectors. If a signal is observed in direct detection experiments, the best
signature for its Galactic origin would be with a directional detector. To meet
that challenge, directional Dark Matter detectors should be sensitive to low
energy recoils in the keV range and have an angular resolution better than
$20^{circ}$. MIMAC (MIcro-TPC MAtrix of Chambers) is a low pressure gas
detector which provides both the kinetic energy and three-dimensional track
reconstruction of electron and ion tracks. We use specially developped low
energy (1-25 keV) ion beam facilities to test the MIMAC response. In this paper
we report the first ever observations of $^{19}$F ion tracks in this low energy
range. We have studied the track lengths (depths), widths and angular spreads
with respect to the incoming ion direction. The estimated angular resolution is
better than $10^{circ}$ at the measured energies. This is very encouraging for
the hope to get a signature of the Galactic origin of a Dark Matter signal.
Dark Matter (DM) in the form of Weakly Interacting Massive Particles (WIMPs)
has been searched for since the 1980’s. WIMPs interact with nuclei of the
detectors. If a signal is observed in direct detection experiments, the best
signature for its Galactic origin would be with a directional detector. To meet
that challenge, directional Dark Matter detectors should be sensitive to low
energy recoils in the keV range and have an angular resolution better than
$20^{circ}$. MIMAC (MIcro-TPC MAtrix of Chambers) is a low pressure gas
detector which provides both the kinetic energy and three-dimensional track
reconstruction of electron and ion tracks. We use specially developped low
energy (1-25 keV) ion beam facilities to test the MIMAC response. In this paper
we report the first ever observations of $^{19}$F ion tracks in this low energy
range. We have studied the track lengths (depths), widths and angular spreads
with respect to the incoming ion direction. The estimated angular resolution is
better than $10^{circ}$ at the measured energies. This is very encouraging for
the hope to get a signature of the Galactic origin of a Dark Matter signal.
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