Author: Timothy Charles Luce
Publisher:
ISBN:
Category :
Languages : en
Pages : 214

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Measurements of the superthermal electron distribution can be made by observing the polarized electron cyclotron emission. The emission is viewed along a constant magnetic field surface. This simplifies the resonance condition and gives a direct correlation between emission frequency and kinetic energy of the emitting electron. A transformation technique is formulated which determines the anisotropy of the distribution and number density of superthermals at each energy measured. The steady-state distribution during lower hybrid current drive and examples of the superthermal dynamics as the runaway conditions is varied are presented for discharges in the PLT tokamak. 15 refs., 8 figs.

Author: P. C. Efthimion
Publisher:
ISBN:
Category : Cyclotron resonance
Languages : en
Pages : 22

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Author: Sherrie Anne Preische
Publisher:
ISBN:
Category : Imaging systems
Languages : en
Pages : 19

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Author: Sherrie Anne Preische
Publisher:
ISBN:
Category : Imaging systems
Languages : en
Pages : 19

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Author: John Lohr
Publisher: World Scientific
ISBN: 9814548979
Category :
Languages : en
Pages : 678

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The conference proceedings will include the papers of approximately 50 key specialists from most of the world's major fusion laboratories, including the European Community, the U.S., Russia and the PRC. The unifying themes are the emission of electron cyclotron waves by high temperature plasmas and the reciprocal process, absorption, which can be used for heating, non inductive current drive and diagnostic purposes.

Author: V. Tribaldos
Publisher:
ISBN: 9788478341832
Category :
Languages : en
Pages : 19

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Author: Gerardo Giruzzi
Publisher: World Scientific
ISBN: 9814487295
Category : Science
Languages : en
Pages : 613

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The 12th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-12) was held in Aix-en-Provence (France) from May 13 to 16, 2002. This workshop was concerned with the interaction of electromagnetic waves and hot plasmas, a subject of great importance in the framework of research on controlled thermonuclear fusion. Using as a fuel a mixture of deuterium and tritium, which can be extracted from sea water, this is a very promising way to develop an intrinsically safe reactor. The workshop gathered approximately one hundred specialists in the production, use and theory of millimetre waves for heating and diagnostics of fusion plasmas.

Author:
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Category :
Languages : en
Pages :

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During first harmonic electron cyclotron heating (ECH) on the Princeton Divertor Experiment (PDX) (R0 = 137 cm, a = 40 cm), electron temperature was monitored using a grating polychromator which measured second harmonic electron cyclotron emission from the low field side of the tokamak. Interference from the high power heating pulse on the broadband detectors in the grating instrument was eliminated by using a waveguide filter in the transmission line which brought the emission signal to the grating instrument. Off-axis (approx. 4 cm) location of the resonance zone resulted in heating without sawtooth or m = 1 activity. However, heating with the resonance zone at the plasma center caused very large amplitude sawteeth accompanied by strong m = 1 activity: .delta. T/T/sub MAX/ approx. = 0.41, sawtooth period approx. = 4 msec, m = 1 period approx. = 90 .mu. sec, (11 kHz). This is the first time such intense MHD activity driven by ECH has been observed. (For both cases there was no sawtooth activity in the ohmic phase of the discharge before ECH.) At very low densities there is a clear indication that a superthermal electron population is created during ECH.

Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 782

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