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Title: Commissioning and Testing of a new 4.5K Cold Box for JLab Cryogenic Test Facility

A new 4.5K cold box at Jefferson Lab (JLab) Cryogenic Test Facility (CTF) was recently installed and commissioned to upgrade the existing 4.5 K refrigeration system and work in parallel with the existing 4.5 K cold box. This new 4.5 K cold box is equipped with two turbo-expanders and, at its maximum capacity condition, it is expected to support at least 6.6 g/s of helium liquefaction or 650 W of refrigeration at 4.5 K. It can also handle up to 10 g/s 30 K return flow for 2 K refrigeration recovery that supports cryo-module and superconducting cavity testing. Performances of the cold box at its maximum capacity conditions as well as several other operating modes were tested for acceptance. Finally, we will briefly review the new 4.5 K cold box design features and discuss the commissioning and performance testing results.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Report Number(s):
JLAB-ACE-17-2656; DOE/OR/-23177-4526
Journal ID: ISSN 1757-8981
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
IOP Conference Series. Materials Science and Engineering
Additional Journal Information:
Journal Volume: 278; Conference: CEC/ICMC’17, Madison, WI (United States), 9-13 Jul 2017; Journal ID: ISSN 1757-8981
Publisher:
IOP Publishing
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING
OSTI Identifier:
1468751

Wijeratne, Thilan, Hasan, N., Wright, M., Ganni, V., Dixon, K., Creel, J., and Knudsen, P.. Commissioning and Testing of a new 4.5K Cold Box for JLab Cryogenic Test Facility. United States: N. p., Web. doi:10.1088/1757-899X/278/1/012094.
Wijeratne, Thilan, Hasan, N., Wright, M., Ganni, V., Dixon, K., Creel, J., & Knudsen, P.. Commissioning and Testing of a new 4.5K Cold Box for JLab Cryogenic Test Facility. United States. doi:10.1088/1757-899X/278/1/012094.
Wijeratne, Thilan, Hasan, N., Wright, M., Ganni, V., Dixon, K., Creel, J., and Knudsen, P.. 2017. "Commissioning and Testing of a new 4.5K Cold Box for JLab Cryogenic Test Facility". United States. doi:10.1088/1757-899X/278/1/012094. https://www.osti.gov/servlets/purl/1468751.
@article{osti_1468751,
title = {Commissioning and Testing of a new 4.5K Cold Box for JLab Cryogenic Test Facility},
author = {Wijeratne, Thilan and Hasan, N. and Wright, M. and Ganni, V. and Dixon, K. and Creel, J. and Knudsen, P.},
abstractNote = {A new 4.5K cold box at Jefferson Lab (JLab) Cryogenic Test Facility (CTF) was recently installed and commissioned to upgrade the existing 4.5 K refrigeration system and work in parallel with the existing 4.5 K cold box. This new 4.5 K cold box is equipped with two turbo-expanders and, at its maximum capacity condition, it is expected to support at least 6.6 g/s of helium liquefaction or 650 W of refrigeration at 4.5 K. It can also handle up to 10 g/s 30 K return flow for 2 K refrigeration recovery that supports cryo-module and superconducting cavity testing. Performances of the cold box at its maximum capacity conditions as well as several other operating modes were tested for acceptance. Finally, we will briefly review the new 4.5 K cold box design features and discuss the commissioning and performance testing results.},
doi = {10.1088/1757-899X/278/1/012094},
journal = {IOP Conference Series. Materials Science and Engineering},
number = ,
volume = 278,
place = {United States},
year = {2017},
month = {12}
}