Single Charge Sensitive High Voltage Phonon Detectors: Development and Applications to the Search for Dark Matter

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Abstract/Contents

Abstract: Single charge resolution is demonstrated in a cryogenic silicon detector which measures the Neganov-Trofimov-Luke phonons created by drifting charges. This detector was created by instrumenting a 1 cm by 1 cm by 4 mm Si crystal with Quasiparticle-trap-assisted Electrothermal-feedback Transition-edge-sensor phonon sensors on one side and depositing an Al bias grid on the other. Using bias voltages of up to 160V, this detector ultimately achieved charge and phonon energy resolutions of down to approximately 0.07 fundamental charges and 10 eV, respectively. A discussion of the origins and reduction of spontaneous charge flow through the detector crystal ("leakage currents") is presented. Due to its low leakage rate and inherently fast response, this detector was able to probe new areas of electron-recoiling dark matter phase space in a 0.49 gd exposure. The uses of detectors of this type in the SuperCDMS SNOLAB experiment, and in general are also discussed.

Type of resource	text
Date created	May 18, 2018

Author	Romani, Roger Kenneth
Degree granting institution	Stanford University, Department of Physics
Primary advisor	Cabrera, Blas
Advisor	Manoharan, Hari

Subject	dark matter
Subject	silicon
Subject	detector
Subject	single charge
Subject	cryogenic
Subject	tes
Subject	transition edge sensor
Subject	luke
Subject	ntl
Subject	neganov
Subject	trofimov
Subject	phonon
Subject	cdms
Subject	supercdms
Subject	electron recoiling dark matter
Subject	dm
Subject	erdm
Subject	wimp
Subject	Stanford Nanofabrication Facility
Subject	SNF
Genre	Thesis

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License: This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).

Preferred Citation: Romani, Roger Kenneth. (2018). Single Charge Sensitive High Voltage Phonon Detectors: Development and Applications to the Search for Dark Matter. Stanford Digital Repository. Available at: https://purl.stanford.edu/qf543jv2965

Undergraduate Theses, Department of Physics

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