Accession Number:

ADA066922

Title:

Plasma Diffusion in a Space-Simulation Beam-Plasma Discharge.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

• Szuszczewicz,E. P.
• Walker,D. N.
• Holmes,J. C.
• Leinbach,H.

Report Date:

1979-02-12

Pagination or Media Count:

19.0

Abstract:

Electron density and temperature profiles have been measured in a large-facility beam-plasma-dischargeV sub B 1.3 KeV, I sub B 63 ma at low pressure P 2-410 to the -6th powerTorr and low magnetic fields B 1.2 G. The results follow an exponential behavior and are found to be in good agreement with a simple diffusion model. The favorable comparison between theory and experiment yields the first estimate of cross-field electron diffusion perpendicular diffusion coefficientnom 2.2 million sq cmsec under conditions intended to simulate Spacelab-borne beam-plasma investigations. This value for perpendicular diffusion coefficient is orders of magnitude larger than would be expected for a cross-field collisional diffusion process, a result which is identified with the turbulent state of collective beam-plasma interactions.

Descriptors:

• *PLASMAS(PHYSICS)
• *ELECTRON BEAMS
• *DIFFUSION
• SIMULATION
• MAGNETIC FIELDS
• INTERACTIONS
• ELECTRON DENSITY
• TURBULENCE
• ELECTRON ENERGY
• SPACE SHUTTLES
• IONIZATION
• ENERGETIC PROPERTIES
• PARTICLE COLLISIONS

Subject Categories:

• Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE