Supersonic Gas Injector for Plasma Fueling in the National Spherical Torus Experiment
| Autor: | P. Sichta, Jonathan Menard, A. L. Roquemore, V.A. Soukhanovskii, T. Provost, J. K. Dong, Roger Raman, Robert Kaita, W. Blanchard, H.W. Kugel |
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| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Tokamak 020209 energy Nozzle 02 engineering and technology 01 natural sciences 010305 fluids & plasmas law.invention symbols.namesake Optics law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Langmuir probe General Materials Science Supersonic speed Civil and Structural Engineering Jet (fluid) Toroid business.industry Mechanical Engineering Injector Nuclear Energy and Engineering Mach number symbols business |
| Zdroj: | Fusion Science and Technology. 75:1-17 |
| ISSN: | 1943-7641 1536-1055 |
| DOI: | 10.1080/15361055.2018.1502034 |
| Popis: | A supersonic gas injector (SGI) has been developed for fueling and diagnostic applications on the National Spherical Torus Experiment (NSTX). It is comprised of a graphite converging-diverging Laval nozzle and a commercial piezoelectric gas valve mounted on a movable probe at a low-field-side midplane port location. Also mounted on the probe is a diagnostic package: a Langmuir probe, two thermocouples, and five pick-up coils for measuring toroidal, radial, vertical magnetic field components and magnetic fluctuations at the location of the SGI tip. The SGI flow rate is up to 33.25 Pa m3/ (1.75 × 1022 euterium particles/s), comparable to conventional NSTX gas injectors. The nozzle operates in a pulsed regime at room temperature and a reservoir gas pressure up to 665 kPa (5000 Torr). The deuterium jet Mach number of about 4 and the divergence half-angle of 5 to 25 deg have been measured in laboratory experiments simulating the NSTX environment. Reliable operation of the SGI and all mounted diagnostic... |
| Databáze: | OpenAIRE |
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