Massive liquid Ar and Xe detectors for direct Dark Matter searches

A novel experiment for direct search for Dark Matter with liquid argon double-phase chamber with a mass of liquid Ar up to several hundred tons is proposed. To suppress the β, γ and n 0 backgrounds, the comparison of scintillation and ionization signals for every event is suggested. The addition in...

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Bibliographic Details
Published in:JETP letters 2012-10, Vol.96 (3), p.149-152
Main Authors: Ovchinnikov, B. M., Ovchinnikov, Yu. B., Parusov, V. V.
Format: Article
Language:English
Subjects:
Astrophysics and Cosmology
Atomic
Biological and Medical Physics
Biophysics
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
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Summary:A novel experiment for direct search for Dark Matter with liquid argon double-phase chamber with a mass of liquid Ar up to several hundred tons is proposed. To suppress the β, γ and n 0 backgrounds, the comparison of scintillation and ionization signals for every event is suggested. The addition in liquid Ar of photosensitive Ge(CH 3 ) 4 or C 2 H 4 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.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364012150076