Search for light dark matter with DAMIC-M experiment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90107%2F22%3A00381706" target="_blank" >RIV/68407700:90107/22:00381706 - isvavai.cz</a>

Výsledek na webu

<a href="https://theses.fr/2022IMTA0313" target="_blank" >https://theses.fr/2022IMTA0313</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Search for light dark matter with DAMIC-M experiment

Popis výsledku v původním jazyce

DAMIC-M (Dark Matter in CCDs at Modane) is a near-future experiment that aims at searching for low-mass dark matter particles through their interactions with silicon atoms in the bulk of charge-coupled devices(CCDs). Pioneer in this technique was the DAMIC experiment at SNOLAB. Its successor, DAMIC-M, will have a detector mass 17 times larger and will employ a novel CCD technology (skipper amplifiers) to achieve sub-electron readout noise. Strengthened by these characteristics, DAMIC-M will reach unmatched sensitivity to the dark matter candidates of the so-called hidden sector. A challenging requirement is to control the radiogenic background down to the level of a fraction of events perkeV per kg-day of target exposure. To meet this condition, Geant4 based simulations are being utilized to optimize the detector design, drive the material selection and handling, and test background rejection techniques. Furthermore, precise measurements were carried out with skipper CCDs to characterize the spectrum of Compton scattered electrons, which represent a dominant source of environmental background at low energy. This thesis focuses on the explored detector designs, the corresponding predicted background, and the strategies implemented for its mitigation and characterization.

Název v anglickém jazyce

Search for light dark matter with DAMIC-M experiment

Popis výsledku anglicky

DAMIC-M (Dark Matter in CCDs at Modane) is a near-future experiment that aims at searching for low-mass dark matter particles through their interactions with silicon atoms in the bulk of charge-coupled devices(CCDs). Pioneer in this technique was the DAMIC experiment at SNOLAB. Its successor, DAMIC-M, will have a detector mass 17 times larger and will employ a novel CCD technology (skipper amplifiers) to achieve sub-electron readout noise. Strengthened by these characteristics, DAMIC-M will reach unmatched sensitivity to the dark matter candidates of the so-called hidden sector. A challenging requirement is to control the radiogenic background down to the level of a fraction of events perkeV per kg-day of target exposure. To meet this condition, Geant4 based simulations are being utilized to optimize the detector design, drive the material selection and handling, and test background rejection techniques. Furthermore, precise measurements were carried out with skipper CCDs to characterize the spectrum of Compton scattered electrons, which represent a dominant source of environmental background at low energy. This thesis focuses on the explored detector designs, the corresponding predicted background, and the strategies implemented for its mitigation and characterization.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

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Návaznosti

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Rok uplatnění

2022

Kód důvěrnosti údajů

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