Massive liquid Ar and Xe detectors for direct Dark Matter searches
B. M. Ovchinnikov, Yu. B. Ovchinnikov, V. V. Parusov
TL;DR
This paper proposes a large-scale liquid argon detector for direct Dark Matter detection, utilizing scintillation and ionization signals, background suppression techniques, and GEM detectors for high-efficiency signal detection.
Contribution
It introduces a novel liquid argon double-phase detector design with background suppression methods and advanced detection techniques for Dark Matter searches.
Findings
Effective background suppression achieved through scintillation-ionization comparison.
Use of photosensitive additives enhances scintillation signal detection.
GEM detectors provide stable and reliable electron detection.
Abstract
A novel experiment for direct searches of the Dark Matter with liquid argon double-phase chamber with a mass of liquid Ar up to several hundred tons is proposed. To suppress the b-, g- and n0- backgrounds, the comparison of scintillation and ionization signals for every event is suggested. The addition in liquid Ar of photosensitive Ge(CH3)4 or C2H4 and suppression of triplet component of scintillation signals ensures the detection of scintillation signals with high efficiency and provides a complete suppression of the electron background. For the detection of photoelectrons and ionization electrons, highly stable and reliable GEM detectors must be used.
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