Manipulation of elctron beam generation with modified magnetic circuit on laser-wakefield acceleration

Author

Yamazaki, A. ; Maekawa, A. ; Tsujii, R. ; Uesaka, M. ; Kinoshita, K. ; Hosokai, T. ; Zhidkov, A.

Author_Institution

Univ. of Tokyo, Tokai

fYear

2007

fDate

25-29 June 2007

Firstpage

2790

Lastpage

2792

Abstract

Electron beam injection triggered by intense ultrashort laser pulses, which is called as plasma cathode, is presented. We have studied generation of relativistic electrons by interaction between a high intensity ultrashort laser pulse and gas jet. When a static magnetic field of 0.2 T is applied, the modification of the preplasma cavity, and significant enhancement of emittance and an increase of the total charge of electron beams produced by a 12 TW, 40 fs laser pulse tightly focused in a He gas jet, were observed. And very high stability and reproducibility of the characteristics and position of well-collimated electron beams was detected. We performed an experiment with a magnetic circuit that has more intense magnetic field of 1 T.

Keywords

accelerator cavities; accelerator magnets; electron accelerators; electron beams; high-speed optical techniques; particle beam injection; plasma accelerators; plasma jets; wakefield accelerators; electron beam injection; gas jet; laser-wakefield acceleration; magnetic circuit; magnetic field; magnetic flux density 0.2 T; plasma cathode; preplasma cavity; static magnetic field; time 40 fs; ultrashort laser pulses; Acceleration; Electron beams; Gas lasers; Laser beams; Magnetic circuits; Magnetic fields; Optical pulse generation; Optical pulses; Particle beams; Plasma accelerators;

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.2007.4440577

Filename

4440577