Diagnosis of high-temperature implosions using low- and high-opacity Krypton lines
- Univ. of Rochester, NY (United States). Lab. for Laser Energetics
- Univ. of Florida, Gainesville, FL (United States); and others
High-temperature laser target implosions can be achieved by using relatively thin-shell targets, and they can be. diagnosed by doping the fuel with krypton and measuring K-shell and L-shell lines. Electron temperatures of up to 5 keV at modest compressed densities ({approximately}1-5g/cm{sup 3}) are predicted for such experiments, with ion temperatures peaking above 10 keV at the center. It is found that the profiles of low-opacity (optically thin) lines in the expected density range are dominated by the Doppler broadening and can provide a measurement of the ion temperature if spectrometers of spectral resolution {Delta}{lambda}/{lambda} {ge} 1000 are used. For high-opacity lines, obtained with a higher krypton fill pressure, the measurement of the escape factor can yield the {rho}R of the compressed fuel. At higher densities, Stark broadening of low-opacity lines becomes important and can provide a density measurement, whereas lines of higher opacity can be used to estimate the extent of mixing.
- Research Organization:
- Rochester Univ., NY (United States). Lab. for Laser Energetics
- Sponsoring Organization:
- USDOE, Washington, DC (United States); New York State Energy Research and Development Authority, Albany, NY (United States)
- DOE Contract Number:
- FC03-92SF19460
- OSTI ID:
- 212701
- Report Number(s):
- DOE/SF/19460-T1; ON: DE96007975; TRN: 96:010595
- Resource Relation:
- Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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