Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>ost</sub> - Miscellaneous article in a specialist periodical
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
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Continuities
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Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
1550-7998
e-ISSN
1550-2368
Volume of the periodical
99
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
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UT code for WoS article
000469023300001
EID of the result in the Scopus database
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