Track length measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e248" altimg="si3.svg"><mml:mrow><mml:msup><mml:mrow/><mml:mrow><mml:mn>19</mml:mn></mml:mrow></mml:msup><mml:msup><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> ions with the MIMAC directional Dark Matter detector prototype

Ye, Tao; Beaufort, C.; Moric, I.; Tao, C.; Santos, D.; Sauzet, N.; Couturier, C.; Guillaudin, O.; Muraz, J.F.; Naraghi, F.; Zhou, N.; Busto, J.

doi:10.1016/j.nima.2020.164569

Cited by 17 publications

(11 citation statements)

References 30 publications

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“…In Section 6.4, the detector development in the context of solar axion search will be described in detail, while the use of Micromegas for neutrinoless double-beta decay is presented in Section 6.5. Pertinent initiatives were also carried out for dark matter searches with the TREX-DM experiment [63][64][65] and the MIMAC detector [66].…”

Section: Micromegas Readout Of Tpcsmentioning

confidence: 99%

Current Status and Future Developments of Micromegas Detectors for Physics and Applications

et al. 2021

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Section: Micromegas Readout Of Tpcsmentioning

confidence: 99%

Current Status and Future Developments of Micromegas Detectors for Physics and Applications

et al. 2021

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“…For this reason we use a large gap of 512 µm. We have recently shown that in such conditions we suffer from an elongation of the reconstructed tracks, the elongation being correlated to the gain of the detector [11]. By applying empirical correction we achieved a 15 • angular resolution for > 10 keV fluorine ions sent along the drift direction [12].…”

Section: The Influence Of the Ionic Signal At High Gainmentioning

confidence: 99%

“…The main success of SimuMimac has been to reproduce the measurements published in [11] for which we have sent fluorine ions at the cathode with kinetic energies in the range [6.3 , 26.3 keV] by the use of a facility similar to Comimac. For this experiment, a MIMAC chamber with 5 cm of drift is filled with 50 mbar of Mimac gas, i.e.…”

Section: Agreement Between Simulations and Measurementsmentioning

confidence: 99%

“…The results are presented in Figure 5 where the only novelty compared to our previous work [11] is the SimuMimac simulation. The blue data points correspond to the Garfield++ simulation described above that does not take the avalanche into account.…”

Section: Agreement Between Simulations and Measurementsmentioning

confidence: 99%

“…In order to fully describe the nuclear recoil track at low energy, directional detectors must be sensitive to any primary charge which requires to operate at high gain (above 10 4 ). Recently we have published measurements of fluorine ions down to 6.3 keV [11,12] highlighting some issues with high gain detection. We observed an elongation of the signal duration and a distortion of the 3D track reconstruction, both being correlated to the detector gain.…”

Section: Introductionmentioning

confidence: 99%

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Directionality and head-tail recognition in the keV-range with the MIMAC detector by deconvolution of the ionic signal

Beaufort,

Guillaudin,

Muraz

et al. 2021

Preprint

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Directional detection is the only admitted strategy for the unambiguous identification of galactic Dark Matter (DM) even in the presence of an irreducible background as beyond the neutrino floor. This approach requires to measure the direction of a DM-induced nuclear recoil in the keV-range. To probe such low energies, directional detectors must operate at high gain where 3D track reconstruction can be distorted by the influence of the numerous ions produced in the avalanches. We describe the interplay between electrons and ions during signal formation in a Micromegas. We introduce SimuMimac, a simulation tool dedicated to high gain detection that agrees with MIMAC measurements. We propose an analytical formula to deconvolve the ionic signal induced on the grid from any measurements, with no need of prior nor ad hoc parameter. We experimentally test and validate this deconvolution, revealing the fine structure of the primary electrons cloud and consequently leading to head-tail recognition in the keV-range. Finally, we present how this deconvolution can be used for directionality by reconstructing mono-energetic neutron spectra at 27 keV and 8 keV with an angular resolution better than 15 • . This novel approach for directionality appears as complementary to the standard one from 3D tracks reconstruction and offers redundancy for improving directional performances at high gain in the keV region.

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Dark Matter Directionality Detection performance of the Micromegas-based μTPC-MIMAC detector

Beaufort

Moric

et al. 2022

Nuclear Instruments and Methods in Physics Research Section A:

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Track length measurement of 19F+ ions with the MIMAC directional Dark Matter detector prototype

Cited by 17 publications

References 30 publications

Current Status and Future Developments of Micromegas Detectors for Physics and Applications

Current Status and Future Developments of Micromegas Detectors for Physics and Applications

Directionality and head-tail recognition in the keV-range with the MIMAC detector by deconvolution of the ionic signal

Dark Matter Directionality Detection performance of the Micromegas-based μTPC-MIMAC detector

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