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Title: Thermal-Mechanical Study of 3.9 GHz CW Coupler and Cavity for LCLS-II Project

Abstract

Third harmonic system was originally developed by Fermilab for FLASH facility at DESY and then was adopted and modified by INFN for the XFEL project [1-3]. In contrast to XFEL project, all cryomodules in LCLS-II project will operate in CW regime with higher RF average power for 1.3 GHz and 3.9 GHz cavities and couplers. Design of the cavity and fundamental power coupler has been modified to satisfy LCLS-II requirements. In this paper we discuss the results of COMSOL thermal and mechanical analysis of the 3.9 GHz coupler and cavity to verify proposed modifica-tion of the design. For the dressed cavity we present simulations of Lorentz force detuning, helium pressure sensitivity df/dP and major mechanical resonances.

Authors:
 [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:
1421543
Report Number(s):
FERMILAB-CONF-16-745-T-TD
1633109
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 28th International Linear Accelerator Conference, East Lansing, Michigan, 09/25-09/30/2016
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Gonin, Ivan, Harms, Elvin, Khabiboulline, Timergali, Solyak, Nikolay, and Yakovlev, Vyacheslav. Thermal-Mechanical Study of 3.9 GHz CW Coupler and Cavity for LCLS-II Project. United States: N. p., 2017. Web. doi:10.18429/JACoW-LINAC2016-MOPLR015.
Gonin, Ivan, Harms, Elvin, Khabiboulline, Timergali, Solyak, Nikolay, & Yakovlev, Vyacheslav. Thermal-Mechanical Study of 3.9 GHz CW Coupler and Cavity for LCLS-II Project. United States. doi:10.18429/JACoW-LINAC2016-MOPLR015.
Gonin, Ivan, Harms, Elvin, Khabiboulline, Timergali, Solyak, Nikolay, and Yakovlev, Vyacheslav. Mon . "Thermal-Mechanical Study of 3.9 GHz CW Coupler and Cavity for LCLS-II Project". United States. doi:10.18429/JACoW-LINAC2016-MOPLR015. https://www.osti.gov/servlets/purl/1421543.
@article{osti_1421543,
title = {Thermal-Mechanical Study of 3.9 GHz CW Coupler and Cavity for LCLS-II Project},
author = {Gonin, Ivan and Harms, Elvin and Khabiboulline, Timergali and Solyak, Nikolay and Yakovlev, Vyacheslav},
abstractNote = {Third harmonic system was originally developed by Fermilab for FLASH facility at DESY and then was adopted and modified by INFN for the XFEL project [1-3]. In contrast to XFEL project, all cryomodules in LCLS-II project will operate in CW regime with higher RF average power for 1.3 GHz and 3.9 GHz cavities and couplers. Design of the cavity and fundamental power coupler has been modified to satisfy LCLS-II requirements. In this paper we discuss the results of COMSOL thermal and mechanical analysis of the 3.9 GHz coupler and cavity to verify proposed modifica-tion of the design. For the dressed cavity we present simulations of Lorentz force detuning, helium pressure sensitivity df/dP and major mechanical resonances.},
doi = {10.18429/JACoW-LINAC2016-MOPLR015},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {5}
}

Conference:
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