Search NASA⌕ Search

SEARCH · Search NASA

Results for “IMPLOSIONS”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 559 records · Page 31
All sourcesNASA NTRSDOE OSTI
DOE OSTI2016

Study of laser-driven cone-in-shell implosion with picosecond monochromatic x-ray radiography on OMEGA

Fuel assembly of a laser-driven cone-in-shell target was studied using picosecond monochromatic x-ray radiography and two-dimensional radiation-hydrodynamics simulation for Fast Ignition (FI) laser fusion. A deuterated plastic shell with a re-entrant Au cone was used as a standard cone-in-shell target in fast ignition heating experiments on OMEGA [W. Theobald et al., Phys. Plasmas 18, 056305 (2011)].

70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗
DOE OSTI2017

X-ray Doppler Velocimetry for Diagnosis of Fluid Motion in ICF Implosions

Paper describes development of a novel diagnostic for measurement of bulk fluid motion in materials that is particularly applicable to very hot, x-ray emitting plasmas in the High Energy Density Physics (HEDP) regime. The X-ray Doppler Velocimetry technique relies on monochromatic imaging in multiple x-ray energy bands near the center of an x-ray emission line in a plasma, and utilizes bent imaging crystals. Higher energy bands are preferentially sensitive to plasma moving towards the viewer, while lower energy bands are preferentially sensitive to plasma moving away from the viewer. Combining multiple images in different energy bands allows for a reconstruction of the fluid velocity field integrated along the line of sight. This paper reviews the technique and discusses progress towards benchmarking the technique with proof-of-principle HEDP experiments.

70 PLASMA PHYSICS AND FUSION TECHNOLOGY↗