Time resolved side scatter diagnostics at NOVA
Side scattering of the radiation during the interaction of a laser beam with the long scale length plasma in hohlraum is a difficult problem of relevance to the viability of ICF. It is important to measure the absolute amount of the laser side scatter as well as the angular distribution of that scatter. The OSA diagnostics has been implemented on NOVA to measure these quantities. We have implemented a fiber-optically coupled streak camera to measure the temporally and angularly resolved side scatter radiation at 351 nm at 9 different angles. Filtered PIN diodes were positioned at 31 various angles in the E-field planed and B-field plane of the incident probe beam to sample and measure the scattered radiation at the 351 nm wavelength of the probe. The diode data was used to calibrate the Brillouin power received by the 9 strategically located fiber optic channels. This presentation will describe the OSA and associated diagnostics.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 240472
- Report Number(s):
- LA-UR-96-1652; CONF-9606208-9; ON: DE96011274; TRN: 96:015177
- Resource Relation:
- Conference: 11. high temperature plasma diagnostic conference, Monterey, CA (United States), 13-17 Jun 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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Improved optical diagnostics for the NOVA laser
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