Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440577
