Effect of line opacity on conditions for radiative collapse in a krypton Z pinch

Conference · Fri Dec 01 00:00:00 EST 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6357582

Apruzese, J P; Kepple, P C ^[1]

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1. Radiation Hydrodynamics Branch, Plasma Physics Division, Naval Research Laboratory, Washington, DC (USA)

A detailed configuration atomic model for krypton ions is used to obtain cooling rates and emissivities for conditions typical of those achieved in a multi-megampere pure krypton Z pinch. The calculation contains 511 separate spectral lines for which radiative transfer is computed using a multicell-coupled escape probability technique. It is found that when the emission is optically thin, the effective Pease-Braginskii current is approximately 100 kA. This current increases with optical depth. However, at ion densities near 5{times}10{sup 22} cm{sup {minus}3}, the spectrum approaches the Planck limit over a large fraction of the radiating energies. Radiative collapse of a pure krypton pinch in Bennett equilibrium is therefore feasible at currents exceeding 100 kA but is unlikely to continue to ion densities substantially above 5{times}10{sup 22} cm{sup {minus}3}.

• OSTI ID: 6357582
• Report Number(s): CONF-8904107-; CODEN: APCPC; TRN: 90-034414
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Vol. 195:1; Conference: 2. international conference on high-density pinches (ICHDP-2), Laguna Beach, CA (USA), 26-28 Apr 1989; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
KRYPTON
PINCH EFFECT
X-RAY SPECTRA
EMISSIVITY
PLASMA SIMULATION
RADIATIVE COOLING
ION DENSITY
KEV RANGE
LINEAR Z PINCH DEVICES
OPACITY
PLASMA DENSITY
THEORETICAL DATA
X RADIATION
COOLING
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
FLUIDS
GASES
INFORMATION
IONIZING RADIATIONS
LINEAR PINCH DEVICES
NONMETALS
NUMERICAL DATA
OPEN PLASMA DEVICES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PINCH DEVICES
RADIATIONS
RARE GASES
SIMULATION
SPECTRA
SURFACE PROPERTIES
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production
700103 - Fusion Energy- Plasma Research- Kinetics