Development of a time-resolved soft x-ray spectrometer for laser produced plasma experiments |
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Authors: | Cone K V Dunn J Schneider M B Baldis H A Brown G V Emig J James D L May M J Park J Shepherd R Widmann K |
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Affiliation: | Lawrence Livermore National Laboratory, Livermore, California 94551, USA. cone2@llnl.gov |
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Abstract: | A 2400 lines/mm variable-spaced grating spectrometer has been used to measure soft x-ray emission (8-22 A?) from laser-produced plasma experiments at Lawrence Livermore National Laboratory's Compact Multipulse Terrawatt (COMET) Laser Facility. The spectrometer was coupled to a Kentech x-ray streak camera to study the temporal evolution of soft x rays emitted from the back of the Mylar and the copper foils irradiated at 10(15)?W/cm(2). The instrument demonstrated a resolving power of ~120 at 19 A? with a time resolution of 31 ps. The time-resolved copper emission spectrum was consistent with a photodiode monitoring the laser temporal pulse shape and indicated that the soft x-ray emission follows the laser heating of the target. The time and spectral resolutions of this diagnostic make it useful for studies of high temperature plasmas. |
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