X-ray backlighting sources of 4 to 10 keV for laser-fusion targets
High-intensity, short-duration x-ray pulses are necessary to diagnose the compression of laser film targets. Present target designs are such that backlighting sources ranging from a few thousand electron volts to 100 keV will be necessary. The desired source durations range from a few tens of picoseconds for flash radiography to several nanoseconds for streaked backlighting, and the source occurrence must be tightly synchronized to that of the target-irradiating laser pulse. For the latter reason, a laser-induced x-ray pulse is preferred. An initial study of the K lines of Ti, Ni, and Zn as possible backlighting sources was conducted. The conversion efficiency of laser light into line radiation was obtained as a function of laser intensity, pulse length, and wavelength. A threshold laser intensity for x-ray line production was identified. Information was obtained on the size and duration of the x-ray emission source, in relation to laser parameters. The experimental results, and their impact on backlighting capability for high-density laser function targets, are discussed.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- OSTI ID:
- 5455194
- Report Number(s):
- UCRL-85592; CONF-820501-1; ON: DE81026223; TRN: 82-011974
- Resource Relation:
- Conference: 1. european conference on cineradiography with photons or particles, Paris, France, 19 May 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LASER TARGETS
X-RAY SPECTRA
LASER-PRODUCED PLASMA
PLASMA DIAGNOSTICS
KEV RANGE 01-10
LASER IMPLOSIONS
NICKEL
TITANIUM
X RADIATION
ZINC
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
IMPLOSIONS
IONIZING RADIATIONS
KEV RANGE
METALS
PLASMA
RADIATIONS
SPECTRA
TARGETS
TRANSITION ELEMENTS
700208* - Fusion Power Plant Technology- Inertial Confinement Technology
700102 - Fusion Energy- Plasma Research- Diagnostics