LCLS-II 1.3 GHz cryomodule design - lessons learned from testing at Fermilab

Cryogenic Engineering Conference 2017

材料科学;物理学

Kaluzny, J.^1 ; Hurd, J.^1 ; Orlov, Y.^1 ; He, Y.^1 ; Bossert, R.^1 ; Grimm, C.^1 ; Schappert, W.^1 ; Atassi, O Al^1 ; Wang, R.^1 ; Arkan, T.^1 ; Theilacker, J.^1 ; Klebaner, A.^1 ; White, M.^1 ; Wu, G.^1 ; Makara, J.^1 ; Ginsburg, C.^1 ; Pei, L.^1 ; Holzbauer, J.^1 ; Hansen, B.^1 ; Stanek, R.^1 ; Peterson, T.^2 ; Harms, E.^1

Fermilab, Batavia

IL

60510, United States^1

SLAC National Accelerator Laboratory, Menlo Park

CA

94025, United States^2

关键词: Cooldown;    Design approaches;    Fermilab;    Linac Coherent Light Source;    Liquid level;    Pressure profiles;    United states department of energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012186/pdf
DOI  :  10.1088/1757-899X/278/1/012186

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Fermilab's 1.3 GHz prototype cryomodule for the Linac Coherent Light Source Upgrade (LCLS-II) has been tested at Fermilab's Cryomodule Test Facility (CMTF). Aspects of the cryomodule design have been studied and tested. The cooldown circuit was used to quickly cool the cavities through the transition temperature, and a heater on the circuit was used to heat incoming helium for warmup. Due to the 0.5% slope of the cryomodule, the liquid level is not constant along the length of the cryomodule. This slope as well as the pressure profile caused liquid level management to be a challenge. The microphonics levels in the cryomodule were studied and efforts were made to reduce them throughout testing. Some of the design approaches and studies performed on these aspects will be presented. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy. This work was supported, in part, by the LCLS-II Project.