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RESEARCH ON LASER-ACCELERATED PROTON GENERATION AT KAERI  

PARK SEONG HEE (Korea Atomic Energy Research Institute)
LEE KITAE (Korea Atomic Energy Research Institute)
CHA YOUNG HO (Korea Atomic Energy Research Institute)
JEONG YOUNG UK (Korea Atomic Energy Research Institute)
BAIK SUNG HOON (Korea Atomic Energy Research Institute)
YOO BYUNG DUK (Korea Atomic Energy Research Institute)
Publication Information
Nuclear Engineering and Technology / v.37, no.3, 2005 , pp. 279-286 More about this Journal
Abstract
A prototype of a relativistic proton generation system, based on laser-induced plasma interaction, has been designed and fabricated. The system is composed of three major parts: a fs TW laser; a target chamber, including targets and controls; and a diagnostic system for charged particles and lasers. An Offner-type pulse stretcher for chirped pulse amplification (CPA) and eight pass pre-amplifier are installed. The main amplifier will be integrated with a new pumping laser. The design values of the laser at the first stage are 1 TW in power and 50 fs in pulse duration. We expect to generate protons with their maximum energy of approximately 3 MeV and the flux of at least $10^6$ per pulse using a 10 $\mu$m Al target. A prototype target chamber with eight 8-inch flanges, including target mounts, has been designed and fabricated. For laser diagnostics, an adaptive optics based on the Shack-Hartmann type, beam monitoring, and alignment system are all under development. For a charged particle, CR-39 detectors, a Thomson parabola spectrometer, and Si charged-particle detectors will be used for the density profile and energy spectrum. In this paper, we present the preliminary design for laser-induced proton generation. We also present plans for future work, as well as theoretical simulations.
Keywords
Laser-plasma Interaction; Proton Generation; X-rays; Femtosecond Lasers; Chirped Pulse Amplification;
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