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Title: RF couplers for normal-conducting photoinjector of high-power CW FEL

Abstract

A high-current emittance-compensated RF photoinjector is a key enabling technology for a high-power CW FEL. A preliminary design of a normal-conducting, 2.5-cell pi-mode, 700-MHz CW RF photoinjector that will be built for demonstration purposes, is completed. This photoinjector will be capable of accelerating a 100-mA electron beam (3 nC per bunch at 35 MHz bunch repetition rate) to 2.7 MeV while providing an emittance below 7 mm-mrad at the wiggler. More than 1 MW of RF power will be fed into the photoinjector cavity through two ridge-loaded tapered waveguides. The waveguides are coupled to the cavity by 'dog-bone' irises cut in a thick wall. Due to CW operation of the photoinjector, the cooling of the coupler irises is a rather challenging thermal management project. This paper presents results of a detailed electromagnetic modeling of the coupler-cavity system, which has been performed to select the coupler design that minimizes the iris heating due to RF power loss in its walls.

Authors:
 [1]
  1. (Sergey)
Publication Date:
Research Org.:
Los Alamos National Laboratory
Sponsoring Org.:
USDOE
OSTI Identifier:
977564
Report Number(s):
LA-UR-04-2768
TRN: US1002898
Resource Type:
Conference
Resource Relation:
Conference: Submitted to: American Physical Society, Denver, Colorado, May 1-4, 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; FREE ELECTRON LASERS; RF SYSTEMS; BEAM INJECTION; SPECIFICATIONS; COUPLING; CAVITIES; TEMPERATURE CONTROL

Citation Formats

Kurennoy, S. RF couplers for normal-conducting photoinjector of high-power CW FEL. United States: N. p., 2004. Web.
Kurennoy, S. RF couplers for normal-conducting photoinjector of high-power CW FEL. United States.
Kurennoy, S. Thu . "RF couplers for normal-conducting photoinjector of high-power CW FEL". United States. https://www.osti.gov/servlets/purl/977564.
@article{osti_977564,
title = {RF couplers for normal-conducting photoinjector of high-power CW FEL},
author = {Kurennoy, S.},
abstractNote = {A high-current emittance-compensated RF photoinjector is a key enabling technology for a high-power CW FEL. A preliminary design of a normal-conducting, 2.5-cell pi-mode, 700-MHz CW RF photoinjector that will be built for demonstration purposes, is completed. This photoinjector will be capable of accelerating a 100-mA electron beam (3 nC per bunch at 35 MHz bunch repetition rate) to 2.7 MeV while providing an emittance below 7 mm-mrad at the wiggler. More than 1 MW of RF power will be fed into the photoinjector cavity through two ridge-loaded tapered waveguides. The waveguides are coupled to the cavity by 'dog-bone' irises cut in a thick wall. Due to CW operation of the photoinjector, the cooling of the coupler irises is a rather challenging thermal management project. This paper presents results of a detailed electromagnetic modeling of the coupler-cavity system, which has been performed to select the coupler design that minimizes the iris heating due to RF power loss in its walls.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {1}
}

Conference:
Other availability
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