Two-Dimensional Measurements of X-ray Spectra Generated by Laser-Compton Scattering

概要

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Measurements of X-ray spectra generated by laser-Compton scattering are described. Basically, laser-Compton X-rays present distinctive characteristics, such as good-directivity, tunability, and a quasi-monochromatic X-ray spectrum. However, the actual X-ray spectrum is degraded by the effects of the broad spectrum of the laser pulse, and by the intrinsic spatial divergence of the electron bunch defined by the beam emittance. It is important to measure the spectral properties of laser-Compton X-rays for applications involving protein crystallography or mammography. The energy distribution in the forward direction can be observed using a front-illuminated deep-depletion X-ray charge-coupled device (CCD) detector. The spectral width of the measured X-rays within a detection angle of 4 mrad is estimated to be 5.0% (rms) for a CCD resolution of 2.6% (rms). These results can be accurately explained using a simple relationship between the electrons and the laser beam parameters.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2007-01-15