Anomalous delayed loss of trapped D-D fusion products in TFTR

Technical Report · Mon Feb 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6940983· OSTI ID:6940983

Zweben, S J; Darrow, D S; Fredrickson, E D; Mynick, H E

A new anomalous delayed loss of D-D fusion products has been measured at the bottom of the TFRR vessel. This loss is delayed by [approximately] 0.2 sec with respect to the usual prompt first-orbit loss, and has a correspondingly lower energy, i.e. about half the fusion product birth energy. This loss process dominates the total fusion product loss measured 90[degrees] below the midplane for plasma currents. I[ge] 1.8 MA and major radii near R=2.45 m, e.g. for recent TFTR supershots. This delayed feature can occur without large coherent MED activity, although it can be strongly modulated by such activity. Several possible causes for this phenomenon are discussed, but no clear explanation for this delayed loss has yet been found.

• Research Organization: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6940983
• Report Number(s): PPPL-2864; ON: DE93008902
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TFTR TOKAMAK
PARTICLE LOSSES
DEUTERIUM
MAGNETIC FIELD RIPPLES
MHD EQUILIBRIUM
SCATTERING
TRAJECTORIES
CLOSED PLASMA DEVICES
EQUILIBRIUM
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC FIELD CONFIGURATIONS
NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700310* - Plasma Confinement- (1992-)