Development of the JAERI FEL driven by a superconducting accelerator

Author

Minehara, E.J. ; Sugimoto, M. ; Sawamura, M. ; Nagai, R. ; Kikuzawa, N.

Author_Institution

Dept. of Phys., JAERI, Ibaraki, Japan

Volume

1

fYear

1995

fDate

1-5 May 1995

Firstpage

159

Abstract

A prototype for a quasi-CW, and high-average power free electron laser (FEL) driven by a 15 MeV superconducting RF linac has been developed, and constructed at Tokai, JAERI. Expected cryogenic (stand-by loss <3.5 W at 4.5 K) and accelerating fields´ performances (Eacc ~7 MV/m and Q~2×10⁺⁹) of four JAERI superconducting accelerator modules have been demonstrated, and installed them in the FEL accelerator vault. A beam test and commissioning of the JAERI superconducting RF linac as an FEL driver have been successfully performed to get an electron beam ranging from 10 to 20 MeV with nearly full transmision. FEL opticals and beam transport elements around the undulator, which have been already assembled, are now under commissioning. Spontaneous emission in the wavelength of 20 μm to 80 μm or longer has been observed by using the Ge(Cu) and Ge(Ga) detectors and fast current amplifier system

Keywords

electron accelerators; electron beams; free electron lasers; wigglers; 10 to 20 MeV; 15 MeV; 20 to 80 mum; 4.5 K; FEL driver; FEL opticals; JAERI FEL; beam transport elements; fast current amplifier system; high-average power free electron laser; spontaneous emission; superconducting RF linac; superconducting accelerator; superconducting accelerator modules; undulator; Acceleration; Cryogenics; Free electron lasers; Linear particle accelerator; Optical beams; Performance evaluation; Power lasers; Prototypes; Radio frequency; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.504597

Filename

504597