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Title: Development of fundamental power coupler for high-current superconducting RF cavity

Abstract

Brookhaven National Laboratory took a project of developing a 704 MHz five-cell superconducting RF cavity for high-current linacs, including Energy Recovery Linac (ERL) for planned electron-hadron collider eRHIC. The cavity will be fed by a high-power RF amplifier using a coaxial Fundamental Power Coupler (FPC), which delivers 20 kW of CW RF power to the cavity. The design of FPC is one of the important aspects as one has to take into account the heat losses dissipated on the surface of the conductor by RF fields along with that of the static heat load. Using a simple simulation model we show the temperature profile and the heat load dissipated along the coupler length. To minimize the heat load on FPC near the cavity end, a thermal intercept is required at an appropriate location on FPC. A 10 K intercept was chosen and its location optimized with our simulation code. The requirement on the helium gas flow rate for the effective heat removal from the thermal intercept is also discussed.

Authors:
; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE SC OFFICE OF SCIENCE (SC)
OSTI Identifier:
1044781
Report Number(s):
BNL-96800-2012-CP
R&D Project: KBCH139; 18074; KB0202011; TRN: US1203504
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2012 International Particle Accelerator Conference (IPAC 2012); New Orleans, LA; 20120520 through 20120525
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; AMPLIFIERS; BNL; DESIGN; ENERGY RECOVERY; GAS FLOW; HEAT LOSSES; HELIUM; LINEAR ACCELERATORS; REMOVAL; SIMULATION

Citation Formats

Jain, P, Belomestnykh, S, Ben-Zvi, I, and Xu, W. Development of fundamental power coupler for high-current superconducting RF cavity. United States: N. p., 2012. Web.
Jain, P, Belomestnykh, S, Ben-Zvi, I, & Xu, W. Development of fundamental power coupler for high-current superconducting RF cavity. United States.
Jain, P, Belomestnykh, S, Ben-Zvi, I, and Xu, W. 2012. "Development of fundamental power coupler for high-current superconducting RF cavity". United States. https://www.osti.gov/servlets/purl/1044781.
@article{osti_1044781,
title = {Development of fundamental power coupler for high-current superconducting RF cavity},
author = {Jain, P and Belomestnykh, S and Ben-Zvi, I and Xu, W},
abstractNote = {Brookhaven National Laboratory took a project of developing a 704 MHz five-cell superconducting RF cavity for high-current linacs, including Energy Recovery Linac (ERL) for planned electron-hadron collider eRHIC. The cavity will be fed by a high-power RF amplifier using a coaxial Fundamental Power Coupler (FPC), which delivers 20 kW of CW RF power to the cavity. The design of FPC is one of the important aspects as one has to take into account the heat losses dissipated on the surface of the conductor by RF fields along with that of the static heat load. Using a simple simulation model we show the temperature profile and the heat load dissipated along the coupler length. To minimize the heat load on FPC near the cavity end, a thermal intercept is required at an appropriate location on FPC. A 10 K intercept was chosen and its location optimized with our simulation code. The requirement on the helium gas flow rate for the effective heat removal from the thermal intercept is also discussed.},
doi = {},
url = {https://www.osti.gov/biblio/1044781}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun May 20 00:00:00 EDT 2012},
month = {Sun May 20 00:00:00 EDT 2012}
}

Conference:
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