Control of ash accumulation by induced-fishbones
Thermal alphas will accumulate in the ignited long pulse tokamak. Ash accumulation results in fuel dilution, reduced power output, increase in Z{sub eff}, and increased synchrotron losses. Recent Baldur' simulations of the ITER show that the ash accumulation is a distinct possibility for high ash recycling case, inevitably leading to burn quench. So, some means of ash is highly desirable. To this end, several control schemes have been looked at. Given the uncertainty in transport information especially for the ash and other impurity transport, it is desirable to incorporate some explicit ash control features in the tokamak design. Continuing the search for more desirable schemes, in this paper we explore the effectiveness of fishbones' towards controlling the alpha accumulation.
- Research Organization:
- Illinois Univ., Urbana, IL (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG02-86ER52127
- OSTI ID:
- 5327449
- Report Number(s):
- CONF-8906236-1; ON: DE90001565; TRN: 89-029841
- Resource Relation:
- Conference: ARIES meeting, Boston, MA (USA), Jun 1989
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
IMPURITIES
CONTROL
TOKAMAK DEVICES
ALPHA PARTICLES
DISPERSION RELATIONS
FISHBONE INSTABILITY
CHARGED PARTICLES
CLOSED PLASMA DEVICES
INSTABILITY
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
THERMONUCLEAR DEVICES
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