DocumentCode :
1502387
Title :
MHD-to-PIC transition for modeling of conduction and opening in a plasma opening switch
Author :
Schumer, Joseph W. ; Swanekamp, Stephen B. ; Ottinger, Paul F. ; Commisso, Robert J. ; Weber, Bruce V. ; Smithe, David N. ; Ludeking, Larry D.
Author_Institution :
Div. of Plasma Phys., Naval Res. Lab., Washington, DC, USA
Volume :
29
Issue :
3
fYear :
2001
fDate :
6/1/2001 12:00:00 AM
Firstpage :
479
Lastpage :
493
Abstract :
The plasma opening switch (POS) is a critical element of some inductive-energy-storage pulsed-power generators. Detailed understanding of plasma redistribution and thinning during the POS conduction phase can be gained through magnetohydrodynamic fluid (MHD) simulations. As space-charge separation and kinetic effects become important late in the conduction phase (beginning of the opening phase), MHD methods become invalid and particle-in-cell (PIC) methods should be used. In this paper, the applicability of MHD techniques is extended into PIC-like regimes by including nonideal MHD phenomena such as the Hall effect and resistivity. The feasibility of the PIC technique is, likewise, extended into high-density, low-temperature-MHD-like regimes by using a novel numerical cooling algorithm. At an appropriate time, an MHD-to-PIC transition must be accomplished in order to accurately simulate the POS opening phase. The mechanics for converting MHD output into PIC input are introduced, as are the transition criteria determining when to perform this conversion. To establish these transition criteria, side-by-side MHD and PIC simulations are presented and compared. These separate simulations are then complemented by a proof-of-principle MHD-to-PIC transition, thereby demonstrating this MHD-to-PIC technique as a potentially viable tool for the simulation of POS plasmas. Practical limitations of the MHD-to-PIC transition method and applicability of the transition criteria to hybrid fluid-kinetic simulations are discussed
Keywords :
plasma kinetic theory; plasma magnetohydrodynamics; plasma simulation; plasma switches; pulsed power supplies; pulsed power switches; Hall effect; MHD-to-PIC transition; conduction; critical element; high-density low-temperature-MHD-like regimes; hybrid fluid-kinetic simulations; inductive-energy-storage pulsed-power generators; kinetic effects; magnetohydrodynamic fluid simulations; modeling; numerical cooling algorithm; opening; particle-in-cell methods; plasma opening switch; plasma redistribution; plasma thinning; resistivity; space-charge separation; transition criteria; Hall effect; Kinetic theory; Magnetohydrodynamic power generation; Physics; Plasma accelerators; Plasma density; Plasma simulation; Power transmission lines; Pulse generation; Switches;
fLanguage :
English
Journal_Title :
Plasma Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-3813
Type :
jour
DOI :
10.1109/27.928946
Filename :
928946
Link To Document :
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