Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90072%2F19%3A00344286" target="_blank" >RIV/68407700:90072/19:00344286 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevD.99.102003" target="_blank" >https://doi.org/10.1103/PhysRevD.99.102003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.99.102003" target="_blank" >10.1103/PhysRevD.99.102003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment

Popis výsledku v původním jazyce

Spherical proportional counters (SPCs) are a novel gaseous detector technology employed by the NEWS-G low-mass dark matter search experiment for their high sensitivity to single electrons from ionization. In this paper, we report on the first characterization of the single electron response of SPCs with unprecedented precision, using a UV-laser calibration system. The experimental approach and analysis methodology are presented along with various direct applications for the upcoming next phase of the experiment at SNOLAB. These include the continuous monitoring of the detector response and electron drift properties during dark matter search runs, as well as the experimental measurement of the trigger threshold efficiency. We measure a mean ionization energy of W = 27.6 +/- 0.2 eV in Ne + CH4 (2%) for 2.8 keV x-rays, and demonstrate the feasibility of performing similar precision measurements at sub-keV energies for future gas mixtures to be used for dark matter searches at SNOLAB.

Název v anglickém jazyce

Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment

Popis výsledku anglicky

Spherical proportional counters (SPCs) are a novel gaseous detector technology employed by the NEWS-G low-mass dark matter search experiment for their high sensitivity to single electrons from ionization. In this paper, we report on the first characterization of the single electron response of SPCs with unprecedented precision, using a UV-laser calibration system. The experimental approach and analysis methodology are presented along with various direct applications for the upcoming next phase of the experiment at SNOLAB. These include the continuous monitoring of the detector response and electron drift properties during dark matter search runs, as well as the experimental measurement of the trigger threshold efficiency. We measure a mean ionization energy of W = 27.6 +/- 0.2 eV in Ne + CH4 (2%) for 2.8 keV x-rays, and demonstrate the feasibility of performing similar precision measurements at sub-keV energies for future gas mixtures to be used for dark matter searches at SNOLAB.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10303 - Particles and field physics

Projekt

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Návaznosti

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Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

1550-7998

e-ISSN

1550-2368

Svazek periodika

99

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

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Kód UT WoS článku

000469023300001

EID výsledku v databázi Scopus

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