Measurement of the ionization yield of nuclear recoils in liquid argon using a two-phase detector with electroluminescence gap

Abstract

A measurement of ionization yields in noble-gas liquids is relevant to the energy calibration of nuclear recoil detectors for dark matter search and coherent neutrino-nucleus scattering experiments. In this work we further study the ionization yield of nuclear recoils in liquid Ar, using a two-phase detector with an electroluminescence gap and DD neutron generator. The ionization yields of nuclear recoils in liquid Ar were measured at 233 keV and electric fields of 0.56 and 0.62 kV/cm; their values amounted to 5.9 $\pm$ 0.8 and 7.4 $\pm$ 1 e${}^{-}$/keV, respectively. The characteristic dependences of the ionization yield on energy and electric field were determined, while comparing the results obtained to those at lower energies and higher fields.

10 pages, 8 figures, 1 table. Submitted to the Proceedings of the Instrumentation for Colliding Beam Physics (INSTR17) Conference. To be published in JINST

References in corpus (5)

• Liquid noble gas detectors for low energy particle physics
• Measurement of Scintillation and Ionization Yield and Scintillation Pulse Shape from Nuclear Recoils in Liquid Argon
• Photon emission and atomic collision processes in two-phase argon doped with xenon and nitrogen
• Measurement of the ionization yield of nuclear recoils in liquid argon at 80 and 233 keV
• MPPC versus MRS APD in two-phase Cryogenic Avalanche Detectors

Cited by in corpus (1)

• Simulation of argon response and light detection in the DarkSide-50 dual phase TPC