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Sub-MeV tunably polarized X-ray production with laser Thomson backscattering

Kawase, Keigo; Kando, Masaki; Hayakawa, Takehito; Daito, Izuru; Kondo, Shuji; Homma, Takayuki; Kameshima, Takashi; Kotaki, Hideyuki; Chen, L.-M.; Fukuda, Yuji; Faenov, A. Y.; Shizuma, Toshiyuki; Fujiwara, Mamoru; Bulanov, S. V.; Kimura, Toyoaki; Tajima, Toshiki

Reported in this article is the generation of unique polarized X-rays in the sub-MeV region by means of the Thomson backscattering of the Nd:YAG laser photon with a wavelength of 1064 nm on the 150 MeV electron from the microtron accelerator. The maximum energy of the X-ray photons is estimated to about 400 keV. The total energy of the backscattered X-ray pulse is measured with an imaging plate and a LYSO scintillator. The angular divergence of the X-rays is also measured by using the imaging plate. We confirm that the X-ray beam is polarized according to the laser polarization direction with the Compton scattering method. In addition, we demonstrate the imaging of the object shielded by lead with the generated X-rays.

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