By Topic

Kinetic Modeling of Initiation of Explosion Center on Cathode Under Dense Plasma

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Shmelev, D.L. ; Institute of Electrophysics Russian Academy of Science, Ekaterinburg , Russia ; Barengolts, S.A.

A kinetic 1-D spherically symmetric model of heating of microprotrusion (with a curvature radius of 1 $muhbox{m}$) on the cathode under dense plasma is developed. The kinetic model is a model of 1D3V PIC/DSMC type. The model takes into account the main types of elastic and inelastic collisions of particles in the plasma as well as evaporation and thermofield electron emission from the cathode. The surrounding plasma parameters in the model are fixed on the boundary placed at a certain distance from the microprotrusion. The applied voltage drop is also fixed on the same boundary. The further evolutions of the plasma, current, and cathode temperature are calculated self-consistently taking into account the influence of the plasma generated during the process. The calculations have shown that, under the certain condition, thermal runaway is developed and the cathode surface temperature reaches the critical one. However, this instability is not caused by microprotrusion Joule heating because the current density is comparatively small $(<10^{8} hbox{A}/hbox{cm}^{2})$ at that moment.

Published in:

Plasma Science, IEEE Transactions on  (Volume:41 ,  Issue: 8 )