RF couplers for normal-conducting photoinjector of high-power CW FEL
Conference
·
OSTI ID:977564
- Sergey
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.
- Research Organization:
- Los Alamos National Laboratory
- Sponsoring Organization:
- DOE
- OSTI ID:
- 977564
- Report Number(s):
- LA-UR-04-2768
- Country of Publication:
- United States
- Language:
- English
Similar Records
RF coupler for high-power CW FEL photoinjector
Normal-conducting RF cavity of high current photoinjector for high power CW FEL.
Normal conducting RF cavity of high current photoinjector for high power CW FEL.
Conference
·
Tue Dec 31 23:00:00 EST 2002
·
OSTI ID:976647
Normal-conducting RF cavity of high current photoinjector for high power CW FEL.
Conference
·
Wed Dec 31 23:00:00 EST 2003
·
OSTI ID:977806
Normal conducting RF cavity of high current photoinjector for high power CW FEL.
Conference
·
Wed Dec 31 23:00:00 EST 2003
·
OSTI ID:977827