NDLI: Phonon-Based Position Determination in SuperCDMS iZIP Detectors

Content Provider	Springer Nature Link
Author	Anderson, Adam
Copyright Year	2014
Abstract	SuperCDMS is currently operating a 10-kg array of cryogenic germanium detectors in the Soudan Underground Laboratory to search for weakly interacting massive particles, a leading dark matter candidate. These detectors, known as iZIPs, measure ionization and athermal phonons from particle interactions with sensors on both sides of a Ge crystal. The ionization signal can be used to efficiently tag events at high radius and near the top and bottoms surfaces, where diminished charge collection can cause events to mimic WIMP-induced nuclear recoils. Using calibration data taken with a $$^{206}$$ Pb source underground at Soudan, we demonstrate rejection of surface events of $$(4.5 \pm 0.9) \times 10^{-4}$$ with 46 % acceptance of nuclear recoils using the phonon signal only. We also show with $$^{133}$$ Ba calibration data underground that the phonon channels can efficiently identify events near the sidewall. This phonon-based approach can also be extended to lower energies than the ionization-based position reconstruction.
Starting Page	959
Ending Page	965
Page Count	7
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	176
Issue Number	5-6
e-ISSN	15737357
Language	English
Publisher	Springer US
Publisher Date	2014-01-06
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SuperCDMS CDMS iZIP Dark matter Phonons Condensed Matter Physics Characterization and Evaluation of Materials Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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The SuperCDMS SNOLAB Detector Tower

Experimental Characterization of Space Charge in IZIP Detectors

Ionization Readout Electronics for SuperCDMS SNOLAB Employing a HEMT Front-End

Validation of Phonon Physics in the CDMS Detector Monte Carlo

Phonon Pulse Shape Discrimination in SuperCDMS Soudan

Temperature Dependent I–V and Resistance Characterization of SuperCDMS Germanium Crystals

Accurate Simulations of $$^{206}$$ Pb Recoils in SuperCDMS

Present Status of the SuperCDMS program

Results and Prospects for the Cryogenic Dark Matter Search (CDMS) Experiment

Phonon-Based Position Determination in SuperCDMS iZIP Detectors

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Validation of Phonon Physics in the CDMS Detector Monte Carlo

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