Fast time resolution charge-exchange measurements during the fishbone instability in the poloidal divertor experiment

Technical Report · Sun Jan 01 04:00:00 EST 1984

DOI:https://doi.org/10.2172/5419948· OSTI ID:5419948

Beiersdorfer, P; Kaita, R; Goldston, R J

Measurements of fast ion losses due to the fishbone instability during high ..beta../sub T/q neutral beam heated discharges in the Poloidal Divertor Experiment have been made using two new vertical-viewing charge-exchange analyzers. The measurements show that the instability has an n=1 toroidal mode number, and that it ejects beam ions in a toroidally rotating beacon directed outward along a major radius. Observations of ejected ions with energies up to twice the beam injection energy at R approx. = R/sub 0/ + a indicate the presence of a non-..mu..-conserving acceleration mechanism.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 5419948
• Report Number(s): PPPL-2070; ON: DE84006278
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
BEAM INJECTION
CHARGE EXCHANGE
CLOSED PLASMA DEVICES
HIGH-BETA PLASMA
INSTABILITY
ION DRIFT
MAGNETIC PROBES
NEUTRAL ATOM BEAM INJECTION
PDX DEVICES
PLASMA
PLASMA INSTABILITY
PROBES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES