Doping liquid argon with xenon in ProtoDUNE Single-Phase: effects on scintillation light Journal Article uri icon

Overview

abstract

  • Abstract; Doping of liquid argon TPCs (LArTPCs) with a small; concentration of xenon is a technique for light-shifting and; facilitates the detection of the liquid argon scintillation; light. In this paper, we present the results of the first doping; test ever performed in a kiloton-scale LArTPC. From February to May; 2020, we carried out this special run in the single-phase DUNE Far; Detector prototype (ProtoDUNE-SP) at CERN, featuring 720 t of total; liquid argon mass with 410 t of fiducial mass. A 5.4 ppm nitrogen; contamination was present during the xenon doping campaign. The goal; of the run was to measure the light and charge response of the; detector to the addition of xenon, up to a concentration of; 18.8 ppm. The main purpose was to test the possibility for; reduction of non-uniformities in light collection, caused by; deployment of photon detectors only within the anode planes. Light; collection was analysed as a function of the xenon concentration, by; using the pre-existing photon detection system (PDS) of ProtoDUNE-SP; and an additional smaller set-up installed specifically for this; run. In this paper we first summarize our current understanding of; the argon-xenon energy transfer process and the impact of the; presence of nitrogen in argon with and without xenon dopant. We then; describe the key elements of ProtoDUNE-SP and the injection method; deployed. Two dedicated photon detectors were able to collect the; light produced by xenon and the total light. The ratio of these; components was measured to be about 0.65 as 18.8 ppm of xenon were; injected. We performed studies of the collection efficiency as a; function of the distance between tracks and light detectors,; demonstrating enhanced uniformity of response for the anode-mounted; PDS. We also show that xenon doping can substantially recover light; losses due to contamination of the liquid argon by nitrogen.

publication date

  • August 1, 2024

has restriction

  • hybrid

Date in CU Experts

  • August 22, 2024 2:21 AM

Full Author List

  • Abed Abud A; Abi B; Acciarri R; Acero MA; Adames MR; Adamov G; Adamowski M; Adams D; Adinolfi M; Adriano C

author count

  • 1321

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1748-0221

Additional Document Info

start page

  • P08005

end page

  • P08005

volume

  • 19

issue

  • 08