| Autor: |
G. Angelone, Antonio Frattolillo, C.R. Foust, S.K. Combs, M. Gasparotto, Larry R. Baylor, S.L. Milora, C. Domma, M. Baldarelli, M. Capobianchi, Michael J Gouge, G. Ronci, S. Migliori, F. Scaramuzzi |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
15th IEEE/NPSS Symposium. Fusion Engineering. |
| Popis: |
The projected fueling requirements of future magnetic confinement devices for controlled thermonuclear research [e.g., the International Thermonuclear Experimental Reactor (ITER)] indicate that a flexible plasma fueling capability is required. This includes a mix of traditional gas puffing and low- and high-velocity deuterium-tritium pellets. Conventional pellet injectors (based on light gas guns or centrifugal accelerators) can reliably provide frozen hydrogen pellets (1- to 6-mm-diam sizes tested) up to /spl sim/1.3-km/s velocity at the appropriate pellet fueling rates (1 to 10 Hz or greater). For long-pulse operation in a higher velocity regime (>2 km/s), an experiment in collaboration between Oak Ridge National Laboratory (ORNL) and ENEA Frascati is under way. This activity will be carried out in the framework of a collaborative agreement between the U.S. Department of Energy and European Atomic Energy Community-ENEA Association. In this experiment, an existing ORNL hydrogen extruder (equipped with a pellet chambering mechanism/gun barrel assembly) and a Frascati two-stage light gas gun driver have been combined on a test facility at ORNL. Initial testing has been carried out with single deuterium pellets accelerated up to 2.1 km/s with the two-stage driver; in addition, some preliminary repetitive testing (to commission the diagnostics) was performed at reduced speeds, including sequences at 0.5 to 1 Hz and 10 to 30 pellets. The primary objective of this study is to demonstrate repetitive operation (up to /spl sim/1 Hz) with speeds in the 2- to 3-km/s range. In addition, the strength of extruded hydrogen ice as opposed to that produced in situ by direct condensation in pipe guns can be investigated. The equipment and initial experimental results are described. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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