Ionization yield in a methane-filled spherical proportional counter

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90263%2F25%3A00384514" target="_blank" >RIV/68407700:90263/25:00384514 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevD.111.072007" target="_blank" >https://doi.org/10.1103/PhysRevD.111.072007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.111.072007" target="_blank" >10.1103/PhysRevD.111.072007</a>

Result language
angličtina
Original language name
Ionization yield in a methane-filled spherical proportional counter
Original language description
Spherical proportional counters (SPCs) are gaseous particle detectors sensitive to single ionization electrons in their target media, with large detector volumes and low background rates. The NEWS-G collaboration employs this technology to search for low-mass dark matter, having previously performed searches with detectors at the Laboratoire Souterrain de Modane (LSM), including a recent campaign with a 135 cm diameter SPC filled with methane. While in situ calibrations of the detector response were carried out at the LSM, measurements of the mean ionization yield and fluctuations of methane gas in SPCs were performed using a 30 cm diameter detector. The results of multiple measurements taken at different operating voltages are presented. A UV laser system was used to measure the mean gas gain of the SPC, along with Ar37 and aluminum-fluorescence calibration sources. These measurements will inform the energy response model of future operating detectors.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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