Effect of radiation losses on the compression of hydrogen by imploding solid liners

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:419796

Hussey, T W; Kiuttu, G F; Degnan, J H; Peterkin, R E ^[1]; Roderick, N F ^[2]; Smith, G A ^[3]; Turchi, P J ^[4]

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1. Phillips Lab., Kirtland AFB, NM (United States). High Energy Sources Div.
2. Univ. of New Mexico, Albuquerque, NM (United States)
3. Pennsylvania State Univ., State College, PA (United States)
4. Ohio State Univ., Columbus, OH (United States)

Quasispherical solid liner implosions with little or no instability growth have been achieved experimentally. Applications for such implosions include the uniform, shock-free compression of some sort of on-axis target. One proposed means of obtaining such compression is to inject a 1 eV hydrogen plasma working fluid between the liner and the target, and imploding the liner around it. the high initial temperature assures that the sound speed within the liner is always greater than the inner surface implosion velocity of the liner, and the initial density is chosen so that the volume of the working fluid at peak compression is sufficiently large so that perfectly spherical convergence of the liner is not required. One concern with such an approach is that energy losses associated with ionization and radiation will degrade the effective gamma of the compression. To isolate and, therefore, understand these effects the authors have developed a simple zero-dimensional model for the liner implosion that accurately accounts for the shape and thickness of the liner as it implodes and compresses the working fluid. Based on simple considerations they make a crude estimate of the range of initial densities of interest for this technique. They then observe that within this density rage, for the temperatures of interest, the lines are strongly self-absorbed so that the transport of radiation is dominated by bound-free and free-free processes.

• OSTI ID: 419796
• Report Number(s): CONF-960634--
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPRESSION
ENERGY LOSSES
HYDROGEN
IMPLOSIONS
LINERS
PLASMA DENSITY
PLASMA SIMULATION