学术报告
学术报告
Hep-ex 20180608 MIMAC - directional dark matter detector
admin 154 阅读 2020-11-11

报告人:Meeting Room 410,TDLI(Tsung-Dao Lee Library)

开始日期:2018-06-08

开始时间:2018-06-08 13:30~14:15

活动地点:Meeting Room 410,TDLI(Tsung-Dao Lee Library)

活动介绍
Abstract

Dark matter (DM) refers to the matter we cannot observe via electromagnetic signals as it does not absorb, emit or reflect EM radiation. Existence and properties ofDM are inferred from its gravitational effects such as the motion of visible matter, gravitational lensing, its influence on the universe large-scale structure, and its effectson the cosmic microwave background. The most widely accepted hypothesis for the DM candidate particles are the weakly interacting massive particles (WIMPs) inter-acting only by weak and gravitational interactions.Directional direct detection has the potential to study dark matter beyond the neutrino floor by taking advantage of the Solar system rotation around the Galactic center. It is based on comparing the WIMP flux anisotropy pointing in the direction of the Sun's velocity vector to the isotropic background in the galactic rest frame. To be able to evidence the Galactic origin of a WIMP signal, a directional detector has to be sensitive to low energy recoils below 10 keV and have an angular resolution not worse than 20°. MIMAC (MIcro-TPC MAtrix of Chambers) is a directional Dark Matter low pressure gas detector (TPC) able to simultaneously provide both the energy and three-dimensional track reconstruction of low energy nuclear recoils. Simultaneous measurements allow for better background-recoil discrimination and access to track directionality. To test the setup, LPSC based beamlines LHI and COMIMAC were used to produce mono-charged calibrated ions with kinetic energies ranging between 6.3 keV and 26.3 keV.

Biography

Igor Moric, Tsinghua University

负责分部
粒子与核物理

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