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in creator/contributor: "Porter, G. D."

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Negative tandem mirror

A tandem mirror configuration can be created by combining hot electron end cell plasmas with neutral beam pumping. A region of large negative potential formed in each end cell confines electrons in the central cell. The requirement of charge neutrality causes the central cell potential to become negative with respect to ground in order to confine ions as well as electrons. We discuss the method of producing and calculating the desired axial potential profile, and show the calculated axial poten… more

Date: November 30, 1981

Creator: Poulsen, P.; Allen, S. L.; Casper, T. A.; Grubb, D. P.; Jong, R. A.; Nexsen, W. E. et al.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Simulation of experimentally achieved detached plasmas using the UEDGE code

The introduction of a divertor Thomson scattering system in DIII-D has enabled accurate determination of the plasma properties in the divertor region. We identify two plasma regimes; detached and attached. The electron temperature in the detached regime is about 2 eV, much lower than 5 to 10 eV determined earlier. We show that fluid models of the DIII-D scrape-off layer plasma are able to reproduce many of the features of these two plasma regimes, including the boundaries for transition between… more

Date: October 30, 1995

Creator: Porter, G. D.; Allen, S. & Fenstermacher, M.