Power flow along a 40‐kV multimegawatt neutral beam line
| Autor: | W. L. Stirling, J. Kim, J. H. Whealton, D. E. Schechter, R. C. Davis, W. L. Gardner, P. M. Ryan, C. C. Tsai, W. K. Dagenhart, H. H. Haselton, M. M. Menon |
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| Rok vydání: | 1979 |
| Předmět: | |
| Zdroj: | Journal of Applied Physics. 50:2484-2489 |
| ISSN: | 1089-7550 0021-8979 |
| DOI: | 10.1063/1.326258 |
| Popis: | The results of a systematic investigation of the power flow along the Oak Ridge National Laboratory/Princeton Large Torus (ORNL/PLT) neutral beam line, using an intense modified duoPIGatron source with a 22‐cm active grid diameter and 1799 circular apertures that provide 53% transparency, are reported. The variation of power deposited on the different components of the beam line is measured over a wide range of perveance values. The maximum efficiency for beam power transmitted through a 20×25‐cm aperture located 4.1 m downstream was found to be 41%. This efficiency was raised to 53% when a voltage of about 175 V was applied to preaccelerate the ions entering the extraction apertures. Transmission efficiencies approaching 60% were obtained using shaped apertures on the plasma grid. Higher efficiencies should be attainable when used for PLT injection since the acceptance angle for the Princeton tokamak is 11% higher than that of the test facility. Detailed analysis of the results using straight circular ap... |
| Databáze: | OpenAIRE |
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