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- Y. Okayasu, H. Dewa, H. Hanaki, S. Matsubara, A. Mizuno, S. Suzuki, T. Taniuchi, H. Tomizawa, K. Yanagida
JASRI/SPring-8, Hyogo-ken, Japan
- T. Ishikawa
RIKEN Spring-8 Harima, Hyogo, Japan
- A. Maekawa, M. Uesaka
The University of Tokyo, Nuclear Professional School, Ibaraki-ken, Japan
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It is essential for precise characterizations of light sources to monitor ever-changing charge distribution of electron bunch by single-shot measurement with high resolutions. Therefore, a single-shot and non-destructive 3D bunch charge distribution (BCD) monitor was developed to characterize longitudinal and transverse BCDs simultaneously. It is based on Electro-Optical (EO) multiple sampling with a manner of spectral decoding. For the transverse detection, eight EO-crystals surround the beam axis azimuthally, and a linear-chirped probe laser pulse with a hollow shape and spirally temporal shift, passes through the EO-crystals. A principle verification experiment has been successfully carried out with two EO-crystals in our facility. In addition, we are promoting a numerical calculation of the ultra-short and radial polarized laser transportation for our own system assuming eight EO-crystals usage in order to confirm observation feasibility. We report the principle and the first experimental results of the novel 3D-BCD monitor and introduce the feasibility demonstration with a calculation about a propagation of transverse polarization distributions along probe laser optics.
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