Ion-Bernstein Wave Excitation from a Fast Wave Antenna in Tokamak Edge-plasma PDF Download
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Author: S. N. Antani
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Author: S. N. Antani
Publisher:
ISBN:
Category :
Languages : en
Pages : 11
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Author:
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Category :
Languages : en
Pages : 21
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Author: J. A. Heikkinen
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Category : Plasma (Ionized gases)
Languages : en
Pages : 20
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Author: S. N. Antani
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Category :
Languages : en
Pages : 15
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Author:
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Category :
Languages : en
Pages : 6
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This proposal was peer reviewed and funded as a Collaboration on ''Low Phase Speed Radio Frequency Current Drive Experiments at the Tokamak Fusion Test Reactor''. The original plans we had were to carry out the collaboration proposal by including a post doctoral scientist stationed at PPPL. In response to a 60+% funding cut, all expenses were radically pruned. The post doctoral position was eliminated, and the Principal Investigator (T. Intrator) carried out the brunt of the collaboration. Visits to TFTR enabled T. Intrator to set up access to the TFTR computing network, database, and get familiar with the new antennas that were being installed in TFTR during an up to air. One unfortunate result of the budget squeeze that TFTR felt for its last year of operation was that the experiments that we specifically got funded to perform were not granted run time on TFTR., On the other hand we carried out some modeling of the electric field structure around the four strap direct launch Ion Bernstein Wave (IBW) antenna that was operated on TFTR. This turned out to be a useful exercise and shed some light on the operational characteristics of the IBW antenna and its coupling to the plasma. Because of this turn of events, the project was renamed ''Modeling of Ion Bernstein Wave Antenna Array and Coupling to Plasma on Tokamak Fusion Test Reactor''.
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Category :
Languages : en
Pages :
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Ion Bernstein wave heating (IBWH) has been investigated on PLT with up to 650 kW of rf power coupled to the plasma, exceeding the ohmic power of 550 kW. Plasma antenna loading of 2 .cap omega. has been observed, resulting in 80 to 90% of the rf power being coupled to the plasma. An ion heating efficiency of .delta. T/sub i/(0)n/sub e//P/sub rf/ = 6 x 1013 eV cm−3/kW, without high energy tail ions, has been observed up to the maximum rf power. The deuterium particle confinement during high power IBWH increases significantly (as much as 300%). Associated with it, a longer injected impurity confinement time, reduced drift wave turbulence activity, frequency shifts of drfit wave turbulence, and development of a large negative edge potential were observed. The energy confinement time, however, shows some degradation from the ohmic value, which can be attributed to the enhanced radiation loss observed during IBWH. The ion heating and energy confinement time are relatively independent of plasma current.
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Category : Power resources
Languages : en
Pages : 782
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Author: University of Wisconsin--Madison. Department of Electrical and Computer Engineering
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Category : Computer engineering
Languages : en
Pages : 500
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Author:
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Category : Controlled fusion
Languages : en
Pages : 134
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Author: N. J. Fisch
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Category : Alpha rays
Languages : en
Pages : 12
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