TITLE

Development of Laser-Driven Proton and Electron Sources Using APRI 100-TW Ti:Sapphire Laser System

AUTHOR(S)
Choi, I. W.; Hafz, N.; Jeong, T. M.; Kim, H. T.; Kim, C. M.; Yu, T. J.; Sung, J. H.; Hong, K.-H.; Lee, S. K.; Noh, Y.-C.; Ko, D.-K.; Lee, J.; Orimo, S.; Yogo, A.; Sagisaka, A.; Ogura, K.; Mori, M.; Li, Z.; Ma, J.; Pirozhkov, A. S.
PUB. DATE
July 2008
SOURCE
AIP Conference Proceedings;7/15/2008, Vol. 1024 Issue 1, p165
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
At the Advanced Photonics Research Institute (APRI) in Korea, we have a Ti:sapphire laser system which delivers laser pulses of 100-TW peak power and 32-fs pulse duration at the repetition rate of 10 Hz. This laser facility is being used to develop compact laser-driven proton and electron sources. Energetic protons are produced by irradiating the laser pulse on a thin foil target made of copper and polyimide via the target normal sheath acceleration. Proton beam with maximum energy of up to 4 MeV was generated from a polyimide target, and showed high energy conversion efficiency from laser to proton energy. Generation of high-energy electron beams by the laser wakefield acceleration was performed by focusing the laser pulses onto a 4 mm-long He-gas jet. Quasi-monoenergetic electron beam with peak energy of 45 MeV and maximum energy of 130 MeV was produced. The quality and characteristics of electron beams are strongly dependent on the laser-plasma interaction length which depends on focal length of the focusing optics.
ACCESSION #
32841993

 

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