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Title: Operational Experience from LCLS-II Cryomodule Testing

Abstract

This paper describes the initial operational experience gained from testing Linac Coherent Light Source II (LCLS-II) cryomodules at Fermilab’s Cryomodule Test Facility (CMTF). Strategies for a controlled slow cooldown to 100 K and a fast cooldown past the niobium superconducting transition temperature of 9.2 K will be described. The test stand for the cryomodules at CMTF is sloped to match gradient in the LCLS-II tunnel at Stanford Linear Accelerator (SLAC) laboratory, which adds an additional challenge to stable liquid level control. Control valve regulation, Superconducting Radio-Frequency (SRF) power compensation, and other methods of stabilizing liquid level and pressure in the cryomodule 2.0 K SRF cavity circuit will be discussed. Several different pumping configurations using cold compressors and warm vacuum pumps have been used on the cryomodule 2.0 K return line and the associated results will be described.

Authors:
 [1];  [1];  [1];  [1];  [1];  [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:
1413976
Report Number(s):
FERMILAB-CONF-17-436-TD
1643987
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: Cryogenic Engineering Conference and International Cryogenic Materials Conference 2017, Madison, WI, USA, 07/09-07/13/2017
Country of Publication:
United States
Language:
English

Citation Formats

Wang, Renzhuo, Hansen, Benjamin, White, Michael, Hurd, Joseph, Atassi, Omar Al, Bossert, Richard, Pei, Liujin, Klebaner, Arkadiy, Makara, Jerry, Theilacker, Jay, Kaluzny, Joshua, Wu, Genfa, and Harms, Elvin. Operational Experience from LCLS-II Cryomodule Testing. United States: N. p., 2017. Web.
Wang, Renzhuo, Hansen, Benjamin, White, Michael, Hurd, Joseph, Atassi, Omar Al, Bossert, Richard, Pei, Liujin, Klebaner, Arkadiy, Makara, Jerry, Theilacker, Jay, Kaluzny, Joshua, Wu, Genfa, & Harms, Elvin. Operational Experience from LCLS-II Cryomodule Testing. United States.
Wang, Renzhuo, Hansen, Benjamin, White, Michael, Hurd, Joseph, Atassi, Omar Al, Bossert, Richard, Pei, Liujin, Klebaner, Arkadiy, Makara, Jerry, Theilacker, Jay, Kaluzny, Joshua, Wu, Genfa, and Harms, Elvin. Sat . "Operational Experience from LCLS-II Cryomodule Testing". United States. doi:. https://www.osti.gov/servlets/purl/1413976.
@article{osti_1413976,
title = {Operational Experience from LCLS-II Cryomodule Testing},
author = {Wang, Renzhuo and Hansen, Benjamin and White, Michael and Hurd, Joseph and Atassi, Omar Al and Bossert, Richard and Pei, Liujin and Klebaner, Arkadiy and Makara, Jerry and Theilacker, Jay and Kaluzny, Joshua and Wu, Genfa and Harms, Elvin},
abstractNote = {This paper describes the initial operational experience gained from testing Linac Coherent Light Source II (LCLS-II) cryomodules at Fermilab’s Cryomodule Test Facility (CMTF). Strategies for a controlled slow cooldown to 100 K and a fast cooldown past the niobium superconducting transition temperature of 9.2 K will be described. The test stand for the cryomodules at CMTF is sloped to match gradient in the LCLS-II tunnel at Stanford Linear Accelerator (SLAC) laboratory, which adds an additional challenge to stable liquid level control. Control valve regulation, Superconducting Radio-Frequency (SRF) power compensation, and other methods of stabilizing liquid level and pressure in the cryomodule 2.0 K SRF cavity circuit will be discussed. Several different pumping configurations using cold compressors and warm vacuum pumps have been used on the cryomodule 2.0 K return line and the associated results will be described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}

Conference:
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