Measurements of Plasma Expansion due to Background Gas in the Electron Diffusion Gauge Experiment

Morrison, Kyle A. ; Paul, Stephen F. ; Davidson, Ronald C.

Princeton University. Plasma Physics Laboratory.

关键词: Collisions Collisions;    Diffusion;    70 Plasma Physics And Fusion Technology;    Transport Phenonmena;    Atoms;   

DOI  :  10.2172/814741
RP-ID  :  PPPL-3853
RP-ID  :  AC02-76CH03073
RP-ID  :  814741

美国|英语

来源: UNT Digital Library

【 摘 要 】

The expansion of pure electron plasmas due to collisions with background neutral gas atoms in the Electron Diffusion Gauge (EDG) experiment device is observed. Measurements of plasma expansion with the new, phosphor-screen density diagnostic suggest that the expansion rates measured previously were observed during the plasma's relaxation to quasi-thermal-equilibrium, making it even more remarkable that they scale classically with pressure. Measurements of the on-axis, parallel plasma temperature evolution support the conclusion.