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Title: Majorana Thermosyphon Prototype Experimental Results

Abstract

Objective The Majorana demonstrator will operate at liquid Nitrogen temperatures to ensure optimal spectrometric performance of its High Purity Germanium (HPGe) detector modules. In order to transfer the heat load of the detector module, the Majorana demonstrator requires a cooling system that will maintain a stable liquid nitrogen temperature. This cooling system is required to transport the heat from the detector chamber outside the shield. One approach is to use the two phase liquid-gas equilibrium to ensure constant temperature. This cooling technique is used in a thermosyphon. The thermosyphon can be designed so the vaporization/condensing process transfers heat through the shield while maintaining a stable operating temperature. A prototype of such system has been built at PNNL. This document presents the experimental results of the prototype and evaluates the heat transfer performance of the system. The cool down time, temperature gradient in the thermosyphon, and heat transfer analysis are studied in this document with different heat load applied to the prototype.

Authors:
; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1009761
Report Number(s):
PNNL-20065
830403000; TRN: US1101556
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; HIGH-PURITY GE DETECTORS; COOLING SYSTEMS; HEAT TRANSFER; CRYOGENIC FLUIDS; NITROGEN; PERFORMANCE; SHIELDS; TEMPERATURE GRADIENTS; THERMOSYPHONS; DESIGN; Majorana Thermosyphon Experimental Results

Citation Formats

Fast, James E, Reid, Douglas J, and Aguayo Navarrete, Estanislao. Majorana Thermosyphon Prototype Experimental Results. United States: N. p., 2010. Web. doi:10.2172/1009761.
Fast, James E, Reid, Douglas J, & Aguayo Navarrete, Estanislao. Majorana Thermosyphon Prototype Experimental Results. United States. doi:10.2172/1009761.
Fast, James E, Reid, Douglas J, and Aguayo Navarrete, Estanislao. Fri . "Majorana Thermosyphon Prototype Experimental Results". United States. doi:10.2172/1009761. https://www.osti.gov/servlets/purl/1009761.
@article{osti_1009761,
title = {Majorana Thermosyphon Prototype Experimental Results},
author = {Fast, James E and Reid, Douglas J and Aguayo Navarrete, Estanislao},
abstractNote = {Objective The Majorana demonstrator will operate at liquid Nitrogen temperatures to ensure optimal spectrometric performance of its High Purity Germanium (HPGe) detector modules. In order to transfer the heat load of the detector module, the Majorana demonstrator requires a cooling system that will maintain a stable liquid nitrogen temperature. This cooling system is required to transport the heat from the detector chamber outside the shield. One approach is to use the two phase liquid-gas equilibrium to ensure constant temperature. This cooling technique is used in a thermosyphon. The thermosyphon can be designed so the vaporization/condensing process transfers heat through the shield while maintaining a stable operating temperature. A prototype of such system has been built at PNNL. This document presents the experimental results of the prototype and evaluates the heat transfer performance of the system. The cool down time, temperature gradient in the thermosyphon, and heat transfer analysis are studied in this document with different heat load applied to the prototype.},
doi = {10.2172/1009761},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {12}
}

Technical Report:

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