24-28 February 2020
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

Measurements of argon-scintillation and -electroluminescence properties for low mass WIMP dark matter search

27 Feb 2020, 11:30
Invited Oral Instrumentation for Astroparticle and Neutrino physics Instrumentation for Astroparticle and Neutrino physics


Mr Masato Kimura (Waseda University)


An argon scintillation detector has several features that make it attractive for use in various physics projects such as WIMP dark matter search. The detector observes scintillation and/or electroluminescence signals. The main features of the detector are: efficient conversion of energy deposition into observables: powerful particle identification by use of scintillation pulse shape and ionization to scintillation ratio: and scalability and cost efficiency due to the availability of argon. In these projects, comprehensive understanding of the detector property is crucial to reduce systematical uncertainties and improve the physics sensitivity. This talk covers the recent measurements of the argon properties, with a primary focus on the electroluminescence signal. Basic properties of the gas argon luminescence signal are measured using a dedicated gas argon time projection chamber. Based on this measurement, we discuss the luminescence process of the signal, such as a theoretically predicted mechanism called “neutral bremsstrahlung”. In addition, we present several measurements of the liquid argon response, namely, scintillation and ionization yields under high electric field and energy dependence of the argon response. Recent development of the liquid argon scintillation detector for low mass dark matter search is also introduced, which is relatively small but achieves the world-highest light collection efficiency.

Primary author

Mr Masato Kimura (Waseda University)


Mr Kazutaka Aoyama (Waseda University) Prof. Kohei Yorita (Waseda University) Prof. Masashi Tanaka (Waseda University) Mr Tomomasa Takeda (Waseda University)

Presentation Materials