| Autor: |
Combs, S. K., Milora, S. L., Foust, C. R., Baylor, L. R., Barber, G. C., Burris, R. D., Fisher, P. W., Foster, C. A., Lunsford, R. V., Schmidt, G. L., Schuresko, D. D., Senko, T., Shanlever, R. C., Shipley, W. D., Sparks, D. O., Stewart, K. A., Wysor, R. B. |
| Předmět: |
|
| Zdroj: |
Review of Scientific Instruments; Jul1987, Vol. 58 Issue 7, p1195, 9p |
| Abstrakt: |
An eight-shot pneumatic pellet injection system has been developed for plasma fueling of the tokamak fusion test reactor (TFTR). The active cryogenic mechanisms consist of a solid hydrogen extruder and a rotating pellet wheel that are cooled by flowing liquid-helium refrigerant. The extruder provides solid hydrogen for stepwise loading of eight holes located circumferentially around the pellet wheel. This design allows for three different pellet diameters: 3.0 mm (three pellets), 3.5 mm (three pellets), and 4.0 mm (two pellets) in the present configuration. Each of the eight pellets can be shot independently. Deuterium pellets are accelerated in 1.0-m-long gun barrels with compressed hydrogen gas (at pressures from 70 to 105 bar) to velocities in the range 1.0–1.5 km/s. The pellets are transported to the plasma in an injection line that incorporates two stages of guide tubes with intermediate vacuum pumping stations. A remote, stand-alone control and data-acquisition system is used for injector and vacuum system operation. The eight-shot injection system has been installed and operated on TFTR. The design features, operation, and performance characteristics of the system are described. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
