Radiation drive with a composite laser pulse shape

Conference · Thu Jan 01 04:00:00 EST 2004

OSTI ID:977569

Cobble, J A ^[1]; Tubbs, D L ^[2]; Hoffman, N M ^[3]; Swift, D C ^[4]; Tierney, T ^[5]

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1. James A.
2. David L.
3. Nelson M.
4. Damian C.
5. Thomas

The objective is to develop a 6-ns Hohlraum environment on Omega for Be anisotropy studies. In particular, they are seeking an environment for Be isotropy studies with enough growth times to assess the suitability of Be for NIF ignition capsules. In 20 shots to date, we have: (1) synchronized 2 laser pulse shapes at Omega to obtain a smooth halfraum drive for {approx}6 ns; (2) characterized the drive with Dante ({approx}180 eV peak); (3) obtained high quality VISAR data (using a mirror); (4) measured ejected Be sample velocity; (5) made the first estimates of Au migration to the axis of the vacuum halfraum; and (6) collected the first face-on x-ray images of sinusoidally perturbed Be samples. The immediate objective is to qualify a target for the Be studies. To that end, we hope: (1) to explore alternate foot drives; (2) optimize the radiography; and (3) to field and characterize gas-filled targets within the next 6 months.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 977569
• Report Number(s): LA-UR-04-2913
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANISOTROPY
BERYLLIUM
IGNITION
LASER RADIATION
MATERIALS TESTING
OMEGA FACILITY
SHAPE
US NATIONAL IGNITION FACILITY