Femtosecond electron beam dynamics in photocathode accelator

Author

Yang, J. ; Kan, K. ; Kondoh, T. ; Yoshida, Y.

Author_Institution

Osaka Univ., Suita

fYear

2007

fDate

25-29 June 2007

Firstpage

2805

Lastpage

2807

Abstract

Ultrashort-bunch, low-emittance electron beams are essential to reveal the hidden dynamics of intricate molecular and atomic processes in materials through experimentation such as time-resolved pulse radiolysis or time-resolved electron diffraction. The transverse and longitudinal dynamics of ultrashort electron beam in a photocathode linear accelerator were studied for femtosecond electron beam generation. The growths of the emittance, bunch length and energy spread due to the rf and the space charge effects in the rf gun were investigated by changing the laser injection phase. The dependences of the emittance, bunch length and energy spread on the booster linac rf phase were measured. Finally, a 100 fs electron source based on the photocathode rf gun with a femtosecond laser injection is proposed for time-resolved pulse radiolysis and time- resolved electron diffraction. The femtosecond beam dynamics in the rf gun was investigated by simulation.

Keywords

accelerator RF systems; electron accelerators; electron beams; electron sources; linear accelerators; particle beam bunching; particle beam dynamics; particle beam injection; photocathodes; atomic process; booster linac rf phase; bunch length; electron source; femtosecond electron beam dynamics; laser injection phase; longitudinal dynamics; low-emittance electron beams; molecular process; photocathode linear accelerator; rf gun; space charge effects; time-resolved electron diffraction; time-resolved pulse radiolysis; transverse dynamics; ultrashort electron beam; Atomic beams; Atomic measurements; Cathodes; Diffraction; Electron beams; Energy measurement; Length measurement; Linear accelerators; Linear particle accelerator; Space charge;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440582

Filename

4440582