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

被引：0
|
作者：
Wijeratne, T. [1 ]
Hasan, N. [1 ]
Wright, M. [1 ]
Ganni, V. [1 ]
Dixon, K. [1 ]
Creel, J. [1 ]
Knudsen, P. [1 ]
机构：
[1] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
来源：
ADVANCES IN CRYOGENIC ENGINEERING | 2017年 / 278卷
关键词：
D O I：
10.1088/1757-899X/278/1/012094
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. We will briefly review the new 4.5 K cold box design features and discuss the commissioning and performance testing results.
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