Jul 21 – 25, 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

C2Po1G-04 [41]: JLab Chl1 2K Cold Box Replacement

Jul 23, 2019, 9:00 AM
Level 6, Cryo Expo Exhibit Hall

Level 6, Cryo Expo Exhibit Hall


Mrs Shirley Yang (Jefferson Lab)


There is growing evidence showing that the cold compressors in the Modified Sub-atmospheric Cold Box (SC1/SCM) of the JLab Central Helium Liquefier (CHL) are approaching the end of their life. Their replacement parts are no longer available due to obsolescence, thus placing the Physics program at serious risk. A new sub-atmospheric cold box (SC1R), which hosts five technologically superior, water-cooled cold compressors and a similar 4K-2K refrigeration recovery heat exchanger, was funded in July 2017, to replace the existing 2K cold box. The design of the new 2K cold box and the external support system have been completed allowing the project to enter the fabrication and assembly phase, which will be completed here at JLab. We present the design, fabrication, installation and commissioning schedule of the new 2K cold box.

Primary authors

Mrs Shirley Yang (Jefferson Lab) Kelly Dixon (Jefferson Lab) Mr Nathaniel Laverdure (Jefferson Lab) Mr Robert Norton (Jefferson Lab) Corey Butler (Jefferosn Lab) Craig MacDuffie (Jefferson Lab) Damon Rath Dick Brown Scott Thompson (Jefferson Lab) Jonathan Creel (Jefferson Lab) Rusty Spouse (Jefferson Lab) Michele Solaroli (Jefferson Lab) Tom Wilhelm (Jefferson Lab) Tom Renzo (Jefferson Lab) Dr Nusair Hasan (Thomas Jefferson National Accelerator Facility)

Presentation materials