ICRF heating of passing ions in a thermal barrier tandem mirror

Conference · Wed May 01 00:00:00 EDT 1985

OSTI ID:5598065

Molvik, A W; Dimonte, G; Campbell, R; Barter, J; Cummins, W F; Falabella, S; Poulsen, P

Ion heating is used in the central cells of tandem mirrors to reduce the collisional trapping of passing ions in the end cell thermal barriers. In this paper, we reevaluate ICRF heating of the TMX-U central cell in two limits. The first we term isotropic, because we impose the condition that ions heated in the perpendicular direction be confined for at least one 90/sup 0/ scattering time, thereby heating the passing ions. The second we call anisotropic heating. It uses higher ICRF power to mirror trap a majority of the ions near the midplane, thereby reducing the density and collisionality of passing ions. Anisotropic heating has the advantage of increasing with ICRF power, whereas isotropic heating is limited by ion collisionality. Both techniques require gas fueling near the central cell midplane, with an ion cyclotron resonance toward each end cell to heat the cold ions.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5598065
• Report Number(s): UCRL-92619; CONF-8505130-3; ON: DE85011854
• Resource Relation: Conference: 6. topical conference on radio frequency plasma heating, Pine Mountain, GA, USA, 13 May 1985
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TANDEM MIRRORS
ICR HEATING
ANISOTROPY
IONS
PERFORMANCE
THERMAL BARRIERS
CHARGED PARTICLES
HEATING
HIGH-FREQUENCY HEATING
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
PLASMA HEATING
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production