摘要:

The heating of matter by a source of intense x rays is studied under conditions where the energy transport in the hot material is carried by the flux of incident photons. This leads to the formation of a self‐similar heating wave. Particular emphasis is given to the ablative heating wave that exists for a time interval in between supersonic heating initially and diffusive heat transport at later times. An approximate, analytic solution of the similarity equations describing the ablative heating wave is given. A power law dependence of the opacity on temperature and density is assumed, which is strictly valid for a fully ionized plasma and monochromatic incident radiation, but possibly also useful to model more complicated situations in terms of effective parameters.

ISSN:0899-8221    

DOI:10.1063/1.858902

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

A study is done of magnetohydrodynamic (MHD) equilibrium of a self‐confined plasma ball imbedded in an atmosphere with constant pressurep0. It is found that there is more than one equilibrium state for the plasma ball and the average pressure inside the ball is less thanp0. It is also shown that the force‐free magnetic configuration cannot exist in the equilibrium state. In comparison with a spheromak, the magnetic axis in ball lightning drifts toward the center about 10%.

ISSN:0899-8221    

DOI:10.1063/1.858903

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

It is shown that, in the compressible limit considered by Andersson and Weiland, the magnetohydrodynamic ballooning mode disappears if &egr;n(the pressure gradient inverse aspect ratio)≳0.14 irrespective of plasma pressure.

ISSN:0899-8221    

DOI:10.1063/1.858904

出版商:AIP    

年代:1989

数据来源: AIP

摘要:

The questions raised in the comment by Hirose are answered.

ISSN:0899-8221    

DOI:10.1063/1.858905

出版商:AIP    

年代:1989

数据来源: AIP

ISSN:0899-8221    

DOI:10.1063/1.859212

出版商:AIP    

年代:1989

数据来源: AIP