Quantitative measurement of hard x-ray spectra for high intensity laser produced plasma.
X-ray line spectra ranging from 17 to 77 keV were quantitatively measured with a Laue spectrometer, composed of a cylindrically curved crystal and a detector. Either a visible CCD detector coupled with a CsI phosphor screen or an imaging plate can be chosen, depending on the signal intensities and exposure times. The absolute sensitivity of the spectrometer system was calibrated using pre-characterized laser-produced x-ray sources and radioisotopes. The integrated reflectivity for the crystal is in good agreement with predictions by an open code for x-ray diffraction. The energy transfer efficiency from incident laser beams to hot electrons, as the energy transfer agency for specific x-ray line emissions, is derived as a consequence of this work.
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan. zhang-z@ile.osaka-u.ac.jp
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Zhang
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Nishimura
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Namimoto
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Fujioka
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Arikawa
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Nishikino
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Kawachi
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Sagisaka
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Hosoda
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Orimo
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Ogura
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Pirozhkov
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Yogo
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Y
Okano
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H
Kiriyama
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Kondo
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Ohshima
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Azechi