The Methods for Direct Detection of WIMP with Mass <0.5 GeV
B. M. Ovchinnikov, I. I. Tkachev, V. V. Parusov (Institute for Nuclear, Research, Russian Academy of Sciences, Moscow, Russia)
TL;DR
This paper presents a new detection chamber and method for identifying low-mass WIMPs below 0.5 GeV using gas mixtures and advanced sensors, aiming to improve sensitivity and background suppression.
Contribution
It introduces a novel detection chamber filled with specific gas mixtures and sensor configurations for direct WIMP detection below 0.5 GeV.
Findings
Detection energy threshold around eV achieved.
Effective suppression of electron background.
Proposed liquid argon chamber with H2 for enhanced detection.
Abstract
The chamber for direct detection of WIMP with mass <0.5 Gev/c2 was developed. The chamber is filled with gas mixture Ne+10%H2 (0-1bar)+0,15ppm Ge(CH3)4. For events detection used GEM+pin-anodes , which provides the energy threshold about eV. The electron background is suppressed owing to photosensitive addition Ge(CH3)4 . It is proposed also for direct detection of WIMP the liquid argon chamber with H2 dissolved in liquid argon at a concentration 100ppm+0,015ppm Ge(CH3)4 .
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Taxonomy
TopicsSemiconductor materials and interfaces · Semiconductor Quantum Structures and Devices · Chalcogenide Semiconductor Thin Films