Two-dimensional MHD simulations of magnetic field penetration in the plasma opening switch
Three mechanisms for anomalous magnetic field penetration have been investigated in computer simulations of Sandia's plasma opening switch (POS). The POS simulations have been performed using the two-dimensional (2-D) two-temperature single-fluid magnetohydrodynamic (MHD) code HAM (1), (2). The three penetration mechanisms considered are 1) the Chodura model based on the ion-acoustic instability where the saturated value of the anomalous collision frequency is approximated by the ion plasma frequency; 2) a model based on the lower hybrid instability in which the anomalous collision frequency is proportional to both the ion plasma frequency and the electron drift velocity; and 3) a model that limits the ion drift velocity to the plasma influx velocity. Two-dimensional MHD calculations of the POS will be presented which show these models to be qualitatively similar for densities above a few 10/sup 13/ cm/sup -3/, though at lower densities they can be quite different. The calculations are compared to experiments, and some agreement is seen with the lower hybrid model. The other models compare only marginally to experimental results.
- Research Organization:
- Sandia National Labs., Albuquerque, NM 87185 (US)
- OSTI ID:
- 5267604
- Journal Information:
- IEEE Trans. Plasma Sci.; (United States), Vol. PS-15:6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Two-dimensional single fluid MHD simulations of plasma opening switches
Single fluid simulations of plasma openings switch behavior
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
H CODES
PLASMA SWITCHES
COMPUTERIZED SIMULATION
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
COLLISIONS
INSTABILITY
ION PLASMA WAVES
PLASMA DENSITY
SANDIA LABORATORIES
TWO-DIMENSIONAL CALCULATIONS
COMPUTER CODES
ELECTRICAL EQUIPMENT
EQUIPMENT
FLUID MECHANICS
HYDRODYNAMICS
ION WAVES
MECHANICS
NATIONAL ORGANIZATIONS
PLASMA WAVES
SIMULATION
SWITCHES
US AEC
US DOE
US ERDA
US ORGANIZATIONS
640430* - Fluid Physics- Magnetohydrodynamics
700107 - Fusion Energy- Plasma Research- Instabilities
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)