Power and particle balance studies using an instrumented limiter system on ATF

Technical Report · Sat Jun 01 04:00:00 EDT 1991

DOI:https://doi.org/10.2172/5541271· OSTI ID:5541271

Uckan, T.; Mioduszewski, P. K.; Bigelow, T. S.; Glowienka, J. C.; Hiroe, S.; Murakami, M.; Wilgen, J. B.; Wing, W. R.

Power and particle balance studies on the Advanced Toroidal Facility (ATF) torsatron are carried out using a rail limiter system. Both top and bottom limiters are made of graphite tile arrays, and these tiles are instrumented with thermocouples and Langmuir probes for calorimetric and particle flux measurements. Initial experimental results indicate that the limiter power loss accounts for about 12% of the total and the radiation loss for about 30% of the total; the rest of the plasma heating power appears to be going to the vessel wall. The particle flux to the limiters is also about 18%. The fractions of power and particle flux to the limiters are relatively lower than in tokamaks because of the low edge safety factor, q {approximately}1 rather than q {approximately}3 as in a typical tokamak, at the natural boundary of the ATF plasma (which results from the magnetic stellarator configuration of this currentless device). Therefore, for limiters of the same size, these fractions are about a factor of q lower in ATF than in a comparable tokamak device. 11 refs., 8 figs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5541271
• Report Number(s): ORNL/TM-11520; ON: DE91013548
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700209 -- Fusion Power Plant Technology-- Component Development & Materials Testing
ATF TORSATRON
BOUNDARY LAYERS
CARBON
CLOSED PLASMA DEVICES
CONFINEMENT
ECR HEATING
ELECTRIC PROBES
ELEMENTAL MINERALS
ELEMENTS
ENERGY BALANCE
ENERGY LOSSES
GRAPHITE
HEATING
HIGH-FREQUENCY HEATING
LANGMUIR PROBE
LAYERS
LIMITERS
LOSSES
MINERALS
NONMETALS
PLASMA CONFINEMENT
PLASMA HEATING
PLASMA SCRAPE-OFF LAYER
POWER LOSSES
PROBES
STELLARATORS
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR