Density rise experiment on PLT

Technical Report · Sat May 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/5153611· OSTI ID:5153611

Strachan, J D; Bretz, N; Mazzucato, E

The evolution of the density profile in PLT during intense gas puffing is documented and analyzed. Measurements of the spectrum of low energy edge neutrals and of the change in central neutral density indicate that charge-exchange processes alone cannot account for the central density rise. The transient density profile changes can be reproduced numerically by a diffusivity of approx. 10/sup 4/ cm/sup 2//s, and a spatially averaged inward flow of 10/sup 3/ cm/s. These transport coefficients are 10 ..-->.. 10/sup 2/ times larger than neoclassical. The ion energy confinement is reduced, the small scale density fluctuations are increased, and runaway electrons losses are increased during the density rise.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5153611
• Report Number(s): PPPL-1894; ON: DE82015484
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
CHARGE EXCHANGE
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FLUID INJECTION
GAS INJECTION
LEPTONS
PLASMA DENSITY
PLASMA DRIFT
PLT DEVICES
REACTOR FUELING
RUNAWAY ELECTRONS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS