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Title: Thermal conductance modeling and characterization of the SuperCDMS-SNOLAB sub-Kelvin cryogenic system

Abstract

The detectors of the Super Cryogenic Dark Matter Search experiment at SNOLAB (SuperCDMS SNOLAB) will operate in a seven-layered cryostat with thermal stages between room temperature and the base temperature of 15 mK. The inner three layers of the cryostat, which are to be nominally maintained at 1 K, 250 mK, and 15 mK, will be cooled by a dilution refrigerator via conduction through long copper stems. Bolted and mechanically pressed contacts, at and cylindrical, as well as exible straps are the essential stem components that will facilitate assembly/dismantling of the cryostat. These will also allow for thermal contractions/movements during cooldown of the sub-Kelvin system. To ensure that these components and their contacts meet their design thermal conductance, prototypes were fabricated and cryogenically tested. The present paper gives an overview of the SuperCDMS SNOLAB sub-Kelvin architecture and its conductance requirements. Results from the conductance measurements tests and from sub-Kelvin thermal modeling are discussed.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1394790
Report Number(s):
FERMILAB-CONF-17-207-PPD
1625225
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Dhuley, R. C., Hollister, M. I., Ruschman, M. K., Martin, L. D., Schmitt, R. L., Tatkowski, Tatkowski,G.L., Bauer, D. a., and Lukens, P. T. Thermal conductance modeling and characterization of the SuperCDMS-SNOLAB sub-Kelvin cryogenic system. United States: N. p., 2017. Web.
Dhuley, R. C., Hollister, M. I., Ruschman, M. K., Martin, L. D., Schmitt, R. L., Tatkowski, Tatkowski,G.L., Bauer, D. a., & Lukens, P. T. Thermal conductance modeling and characterization of the SuperCDMS-SNOLAB sub-Kelvin cryogenic system. United States.
Dhuley, R. C., Hollister, M. I., Ruschman, M. K., Martin, L. D., Schmitt, R. L., Tatkowski, Tatkowski,G.L., Bauer, D. a., and Lukens, P. T. Wed . "Thermal conductance modeling and characterization of the SuperCDMS-SNOLAB sub-Kelvin cryogenic system". United States. https://www.osti.gov/servlets/purl/1394790.
@article{osti_1394790,
title = {Thermal conductance modeling and characterization of the SuperCDMS-SNOLAB sub-Kelvin cryogenic system},
author = {Dhuley, R. C. and Hollister, M. I. and Ruschman, M. K. and Martin, L. D. and Schmitt, R. L. and Tatkowski, Tatkowski,G.L. and Bauer, D. a. and Lukens, P. T.},
abstractNote = {The detectors of the Super Cryogenic Dark Matter Search experiment at SNOLAB (SuperCDMS SNOLAB) will operate in a seven-layered cryostat with thermal stages between room temperature and the base temperature of 15 mK. The inner three layers of the cryostat, which are to be nominally maintained at 1 K, 250 mK, and 15 mK, will be cooled by a dilution refrigerator via conduction through long copper stems. Bolted and mechanically pressed contacts, at and cylindrical, as well as exible straps are the essential stem components that will facilitate assembly/dismantling of the cryostat. These will also allow for thermal contractions/movements during cooldown of the sub-Kelvin system. To ensure that these components and their contacts meet their design thermal conductance, prototypes were fabricated and cryogenically tested. The present paper gives an overview of the SuperCDMS SNOLAB sub-Kelvin architecture and its conductance requirements. Results from the conductance measurements tests and from sub-Kelvin thermal modeling are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {9}
}

Conference:
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