TY - JOUR
T1 - Scintillation and ionization ratio of liquid argon for electronic and nuclear recoils at drift-fields up to 3 kV/cm
AU - Washimi, T.
AU - Kimura, M.
AU - Tanaka, M.
AU - Yorita, K.
N1 - Funding Information:
This work is a part of the outcome from research performed under the Waseda University Research Institute for Science and Engineering (Project numbers 2016A-507), supported by the JSPS, Japan Grant-in-Aid for Scientific Research on Innovative Areas Grant Numbers 17H05204 and 15H01038 , and the Grant-in-Aid for JSPS Research Fellow, Japan Grant Number 16J06656 .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/12/1
Y1 - 2018/12/1
N2 - A two-phase argon detector has high discrimination power between electron recoil and nuclear recoil events based on the pulse shape discrimination and the ionization/scintillation ratio (S2/S1). This character is very suitable for the dark matter search to establish the low background experiment. However, the basic properties of S2/S1 of argon are not well known, as compared with xenon. We report the evaluation of S2/S1 properties with a two-phase detector at drift-fields of 0.2–3.0 kV/cm. Finally, the discrimination power against electron recoil background of S2/S1 is discussed.
AB - A two-phase argon detector has high discrimination power between electron recoil and nuclear recoil events based on the pulse shape discrimination and the ionization/scintillation ratio (S2/S1). This character is very suitable for the dark matter search to establish the low background experiment. However, the basic properties of S2/S1 of argon are not well known, as compared with xenon. We report the evaluation of S2/S1 properties with a two-phase detector at drift-fields of 0.2–3.0 kV/cm. Finally, the discrimination power against electron recoil background of S2/S1 is discussed.
KW - Argon
KW - Dark matter
KW - Particle identification
KW - Time projection camber
KW - Two-phase detectors
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U2 - 10.1016/j.nima.2018.09.019
DO - 10.1016/j.nima.2018.09.019
M3 - Article
AN - SCOPUS:85053409447
SN - 0168-9002
VL - 910
SP - 22
EP - 25
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ER -