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Title: SuperCDMS Underground Detector Fabrication Facility

Abstract

The SuperCDMS SNOLAB dark matter experiment processes Ge and Si crystals into fully tested phonon and ionization detectors at surface fabrication and test facilities. If not mitigated, it is anticipated that trace-level production of radioisotopes in the crystals due to exposure to cosmic rays at (or above) sea level will result in the dominant source of background events in future dark matter searches using the current SuperCDMS detector technology. Fabrication and testing of detectors in underground facilities shielded from cosmic radiation is one way to directly reduce production of trace levels of radioisotopes, thereby improving experimental sensitivity for the discovery of dark matter beyond the level of the current experiment. In this report, we investigate the cost and feasibility to establish a complete detector fabrication processing chain in an underground location to mitigate cosmogenic activation of the Ge and Si detector substrates. For a specific and concrete evaluation, we explore options for such a facility located at SNOLAB, an underground laboratory in Sudbury, Canada hosting the current and future experimental phases of SuperCDMS.

Authors:
 [1];  [1];  [2];  [2]
  1. Texas A & M Univ., College Station, TX (United States)
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1424835
Report Number(s):
PNNL-27319
KA2303020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Platt, M., Mahapatra, R., Bunker, Raymond A., and Orrell, John L.. SuperCDMS Underground Detector Fabrication Facility. United States: N. p., 2018. Web. doi:10.2172/1424835.
Platt, M., Mahapatra, R., Bunker, Raymond A., & Orrell, John L.. SuperCDMS Underground Detector Fabrication Facility. United States. doi:10.2172/1424835.
Platt, M., Mahapatra, R., Bunker, Raymond A., and Orrell, John L.. Thu . "SuperCDMS Underground Detector Fabrication Facility". United States. doi:10.2172/1424835. https://www.osti.gov/servlets/purl/1424835.
@article{osti_1424835,
title = {SuperCDMS Underground Detector Fabrication Facility},
author = {Platt, M. and Mahapatra, R. and Bunker, Raymond A. and Orrell, John L.},
abstractNote = {The SuperCDMS SNOLAB dark matter experiment processes Ge and Si crystals into fully tested phonon and ionization detectors at surface fabrication and test facilities. If not mitigated, it is anticipated that trace-level production of radioisotopes in the crystals due to exposure to cosmic rays at (or above) sea level will result in the dominant source of background events in future dark matter searches using the current SuperCDMS detector technology. Fabrication and testing of detectors in underground facilities shielded from cosmic radiation is one way to directly reduce production of trace levels of radioisotopes, thereby improving experimental sensitivity for the discovery of dark matter beyond the level of the current experiment. In this report, we investigate the cost and feasibility to establish a complete detector fabrication processing chain in an underground location to mitigate cosmogenic activation of the Ge and Si detector substrates. For a specific and concrete evaluation, we explore options for such a facility located at SNOLAB, an underground laboratory in Sudbury, Canada hosting the current and future experimental phases of SuperCDMS.},
doi = {10.2172/1424835},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2018},
month = {Thu Mar 01 00:00:00 EST 2018}
}

Technical Report:

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