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Development of a Time-resolved Soft X-ray Spectrometer for Laser Produced Plasma Experiments

Conference ·
DOI:https://doi.org/10.1063/1.3492407· OSTI ID:1009648
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A 2400 line/mm variable spaced grating spectrometer (VSG) has been used to measure soft x-ray emission (8-22 {angstrom}) 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 mylar and copper foils irradiated at 10{sup 15} W/cm{sup 2}. The instrument demonstrated a resolving power of {approx} 120 at 19 {angstrom} 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 resolution of this diagnostic make it useful for studies of high temperature plasmas.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
1009648
Report Number(s):
LLNL-CONF-431867
Country of Publication:
United States
Language:
English

References (14)

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COPPER
HEATING
LASER-PRODUCED PLASMA
LASERS
MONITORING
MYLAR
PHOTODIODES
PLASMA DIAGNOSTICS
RESOLUTION
SHAPE
SPECTROMETERS
STREAK CAMERAS
TIME RESOLUTION
X-RAY SPECTROMETERS