Doublet III limiter performance and implications for mechanical design and material selection for future limiters

Conference · Mon Oct 01 00:00:00 EDT 1979

OSTI ID:5841375

Sabado, M. M.; Marcus, F. B.; Trester, P. W.; Wesley, J. C.

The plasma limiter system for Doublet III is described. Initially, high-Z materials, Ta-10W for the primary limiter and Mo for the backup limiters, were selected as the most attractive metallic candidates from the standpoint of thermal and structural properties. For the purpose of evaluating the effect of material Z on plasma performance, the nonmagnetic, Ni-base alloy Inconel X-750 was selected for a medium-Z limiter material. Graphite, a low-Z material, will likely be the next limiter material for evaluation. Design and material selection criteria for the different Z ranges are presented. The performance of the high-Z limiters in Doublet III is reviewed for an operation period that included approximately 5000 plasma shots. Changes in surface appearance and metallurgical changes are characterized. Discussion is presented on how and to what extent the high-Z elements affected the performance of the plasma based on theory and measurements in Doublet III. The fabrication processes for the Inconel X-750 limiters are summarized, and, last, observations on early performance of the Inconel limiters are described. (MOW)

• Research Organization: General Atomic Co., San Diego, CA (USA)
• DOE Contract Number: AT03-76ET51011
• OSTI ID: 5841375
• Report Number(s): GA-A-15633; CONF-791102-49; TRN: 80-001813
• Resource Relation: Conference: 8. symposium on engineering problems of fusion research, San Francisco, CA, USA, 13 Nov 1979
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DOUBLET REACTORS
LIMITERS
PERFORMANCE TESTING
FABRICATION
GRAPHITE
INCONEL X750
MATERIALS TESTING
MECHANICAL PROPERTIES
TANTALUM BASE ALLOYS
TUNGSTEN ALLOYS
ALLOYS
CARBON
CHROMIUM ALLOYS
ELEMENTS
INCONEL ALLOYS
IRON ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
TANTALUM ALLOYS
TESTING
THERMONUCLEAR REACTORS
TITANIUM ALLOYS
TOKAMAK TYPE REACTORS
700209* - Fusion Power Plant Technology- Component Development & Materials Testing