TMX-U experimental results [electronic resource]
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| Online Access: |
Online Access |
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| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Livermore, Calif : Oak Ridge, Tenn. :
Lawrence Livermore National Laboratory ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy,
1983.
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| Abstract: | This paper describes results from the Tandem Mirror Experiment-Upgrade (TMX-U). Mirror-confined electrons with 30 to 70 keV mean energy densities of 0.5 to 2.0 x 10¹² cm⁻³ and average betas of 3 to 5% are produced using electron-cyclotron resonant heating (ECRH). These results are consistent with an electron Fokker-Planck code. Improved ion-cyclotron microstability is observed using neutral beam injection at 47° to the magnetic axis, rather than at 90° as in the previous experiment, TMX. Strong end plugging has been produced using a combination of ECRH gyrotrons with sloshing-ion beam injection. In these low-density central cell experiments (3 x 10¹¹ cm⁻³) the axial losses (tau/sub parallel/ = 20 to 80 ms) are smaller than the nonambipolar radial losses (tau/sub perpendicular/ = 4 to 8 ms). Plugging has been achieved with a central cell density double that of the end plugs. Although no direct measurements are yet available to determine if a thermal barrier potential dip is generated, these experiments support many theoretical features of the thermal barrier concept. |
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| Item Description: | Published through the Information Bridge: DOE Scientific and Technical Information. 08/31/1983. "ucrl-89286" " conf-830909-4" "DE83016790" Course and workshop on mirror-based and field-reversed approaches to magnetic fusion, Varenna, Italy, 7 Sep 1983. Allen, S.L.; Correll, D.L.; Clauser, J.F.; Damm, C.C.; Simonen, T.C.; Coensgen, F.H.; Cummins, W.F.; Casper, T.A.; Clower, C.A.; Failor, B.H. |
| Physical Description: | Pages: 24 : digital, PDF file. |