Positron generation through laser Compton scattering gamma ray

Li, D.; Imasaki, K.; Miyamoto, S.; Horikawa, K.; Amano, S.; Mochizuki, T.
March 2009
Applied Physics Letters;3/2/2009, Vol. 94 Issue 9, pN.PAG
Academic Journal
The positron source is developed through a high brightness gamma-ray beam, which is produced from a laser light scattering off a high-energy electron beam circulating in a storage ring. A thin Pb target is irradiated by the gamma ray to generate positrons via pair creation. By using imaging plate, we measured the generation rate and worked out the energy spectrum of generated positrons and electrons. The experimental results are close to that from Monte Carlo simulation. About 3618 positrons/s at several MeV can be generated by the present experimental setup, and this value can be improved by optimizing experimental conditions.


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