Plasma shaping effects on the collisionless residual zonal flow level
نویسندگان
چکیده
منابع مشابه
PSFC / JA - 06 - 25 Plasma shaping effects on the collisionless residual zonal flow level
Plasma shaping e¤ects, such as elongation, triangularity and Shafranov shift have long been considered an important ingredient in improving tokamak performance. It is known that the growth rate of ion temperature gradient (ITG) turbulence can be regulated by these shaping e¤ects and that the ITG turbulence level can also be regulated by zonal ‡ow. Moreover, recent numerical simulation shows tha...
متن کاملEffects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual
Zonal flow helps reduce and regulate the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal flow damps to a nonvanishing residual level in collisionless M. Rosenbluth and F. Hinton, Phys. Rev. Lett. 80, 724 1998 and collisional F. Hinton and M. Rosenbluth, Plasma Phys. Control. Fusion 41, A653 1999 banana regime plasmas. Recent zonal flow advances are summarized ...
متن کاملPSFC/JA-06-20 Short wavelength effect on the collisionless neoclassical polarization and residual zonal flow level
Sheared zonal ow helps to reduce the turbulent transport caused by the ion temperature gradient (ITG) mode. Rosenbluth and Hinton (R-H) calculated the residual zonal ow level for radial wavelengths that are much larger than the ion poloidal gyroradius. Their calculation is extended to treat arbitrary radial wavelengths. For the radial wavelengths that approach the ion poloidal gyroradius, but...
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flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
PSFC/JA-06-32 Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual
Zonal ow helps reduce the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal ow damps to to a non-vanishing residual level in collisionless and collisional banana regime plasmas Recent zonal ow advances are summarized including the evaluation of the e¤ects on this zonal ow residual of plasma cross section shaping, shorter wavelengths including those less than...
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ژورنال
عنوان ژورنال: Physics of Plasmas
سال: 2006
ISSN: 1070-664X,1089-7674
DOI: 10.1063/1.2266892