1. Development of Laser-Driven Proton and Electron Sources Using APRI 100-TW Ti:Sapphire Laser System.
- Author
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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., and Pirozhkov, A. S.
- Subjects
ULTRASHORT laser pulses ,ELECTRON beams ,PROTON beams ,ACCELERATION (Mechanics) ,LASER-plasma interactions - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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