Accession Number:

ADA200319

Title:

Investigation of Collisional Effects in the Plasma Erosion Opening Switch

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Report Date:

1988-09-20

Pagination or Media Count:

42.0

Abstract:

During the conduction phase of the plasma erosion opening switch PEOS, current channels in the main body of the plasma have been observed experimentally to be much wider than the collisionless skin depth. In addition, the maximum current carried by the switch before opening the conduction current seems to scale roughly linearly with plasma density, n, and switch length, 1. Collisionless PIC code simulations of the plasma switch show current conducted in skin-depth like channels, with the conduction current scaling close to l to the 25ths power and the fourth root of n. Here the effect of collisions on the behavior of the PEOS is investigated and shown to bring the PIC simulations and experimental results in closer agreement. In the collisional simulations, wider current channels are observed and the conduction current scales linearly with 1 and as sq root of n with density in anode dominated simulations. Linear scaling with length and density in the cathode dominated case can be inferred. Keywords Opening switches Plasma erosion opening switches Anomalous transport in plasma Vacuum switches.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE