Alfven-ion-cyclotron Instability in Mirror Machines PDF Download
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Languages : en
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Electrostatic instabilities occurring in mirror-confined ion velocity-distributions have been thoroughly investigated. The electromagnetic instability of greatest concern is the Alfven-ion-cyclotron (AIC) mode. In this work we investigate both convective and absolute growth, both in homogeneous plasma and in finite machines, for a variety of ion velocity-distributions. Good agreement is found with the results from the particle simulation code ''Superlayer''. Quasilinear effects are outlined and a rough criterion found for the importance of Dupree-type broadening.
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Languages : en
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Book Description
Electrostatic instabilities occurring in mirror-confined ion velocity-distributions have been thoroughly investigated. The electromagnetic instability of greatest concern is the Alfven-ion-cyclotron (AIC) mode. In this work we investigate both convective and absolute growth, both in homogeneous plasma and in finite machines, for a variety of ion velocity-distributions. Good agreement is found with the results from the particle simulation code ''Superlayer''. Quasilinear effects are outlined and a rough criterion found for the importance of Dupree-type broadening.
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Languages : en
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Experimental results on ion-cyclotron waves observed in the 2XIIB mirror machine are reviewed, and relevant theoretical work is discussed. The work reported generally substantiates the quasilinear diffusion model of mirror-plasma confinement, but also suggests alternatives. The end-loss current required by theory of the drift-cyclotron loss-cone (DCLC) instability agrees with measurements of this current. The experiment indicates that an increased ratio of plasma radius to ion gyroradius improves plasma confinement. However, measurements sometimes show a second ion-cyclotron mode, which is not the DCLC mode. Theoretical work on loss-cone instabilities has concentrated on linear, quasilinear, and fully nonlinear models of increased sophistication and experimental applicability.
Author: Barry Hulett Mauk
Publisher:
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Category : Cyclotron waves
Languages : en
Pages : 328
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Author: J.G. Cordey
Publisher:
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Category :
Languages : en
Pages : 17
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Category :
Languages : en
Pages :
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A status report of microinstability as it applies to 2XIIB and MX theory for mirror machines is presented. It is shown that quasilinear computations reproduce many of the parameters observed in the 2XIIB experiment. In regard to large mirror machines, there are presented detailed calculations of the linear theory of the drift cyclotron loss-cone mode, with inhomogeneous geometry and nonlinear diffusive effects. Further, the stability of a mirror machine to the Alfven ion-cyclotron instability is assessed, and the Baldwin- Callen diffusion is estimated for a spatially varying plasma. (auth).
Author: N. N. Gorelenkov
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Category : Alpha rays
Languages : en
Pages : 23
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Author: R. Schrittwieser
Publisher: World Scientific Publishing Company
ISBN:
Category : Science
Languages : en
Pages : 188
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Author:
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Category : Nuclear energy
Languages : en
Pages : 1288
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Author: Niels Fujio Otani
Publisher:
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Category :
Languages : en
Pages : 480
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Author: J.G. Cordey
Publisher:
ISBN:
Category :
Languages : en
Pages : 13
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