Neoclassical polarization drift of collisionless single ion in tokamaks with arbitrary time-varying radial electric field

Pan, Chengkang; Xiao, Xiaotao; Wang, Shaojie
March 2011
Physics of Plasmas;Mar2011, Vol. 18 Issue 3, p032514
Academic Journal
An improved theory for the neoclassical polarization drift of the collisionless single ion with the arbitrary time-varying radial electric field is presented. A guiding-center motion code is used to numerically study the neoclassical polarization drift of a collisionless single ion in a model tokamak geometry. The results from the improved theory are compared with the numerical results and they agree with each other very well. The improved theory can be used to study the neoclassical polarization drift due to the fast time-varying radial electric field.


Related Articles

  • Neoclassical polarization drift of collisionless single ions in a sheared radial electric field in a tokamak magnetic geometry. Baek, Hoyul; Seunghoe Ku; Chang, C. S. // Physics of Plasmas;Jan2006, Vol. 13 Issue 1, p012503 

    Neoclassical polarization drift is known to play critical role in the dynamical behavior of a sheared radial electric field Er in a toroidal confinement device. However, basic studies on the effect of radial electric shear on neoclassical polarization drift have not yet appeared in the...

  • Coupling of ion temperature gradient and trapped electron modes in the presence of impurities in tokamak plasmas. Huarong Du; Zheng-Xiong Wang; Dong, J. Q.; Liu, S. F. // Physics of Plasmas;May2014, Vol. 21 Issue 5, p052101-1 

    The coupling of ion temperature gradient (ITG or ηi) mode and trapped electron mode (TEM) in the presence of impurity ions is numerically investigated in toroidal collisionless plasmas, using the gyrokinetic integral eigenmode equation. A framework for excitations of the ITG modes and TEMs...

  • Collisionless electrostatic shock generation and ion acceleration by ultraintense laser pulses in overdense plasmas. Min Chen; Zheng-Ming Sheng; Quan-Li Dong; Min-Qing He; Yu-Tong Li; Bari, Muhammad Abbas; Jie Zhang // Physics of Plasmas;May2007, Vol. 14 Issue 5, p053102 

    Collisionless electrostatic shock (CES) generation and subsequent ion acceleration in laser plasma interaction are studied numerically by particle-in-cell simulations. Usually a CES is composed of a high ion density spike surrounded by a bipolar electric field. Ions in front of it can be either...

  • Effects of dust particles on the dynamics of blobs in the scrape off layer. Jovanović, D.; de Angelis, U.; Fedele, R.; Pegoraro, F. // Physics of Plasmas;Aug2007, Vol. 14 Issue 8, p083704 

    A numerical study is presented of the evolution of plasma blobs in the scrape-off layer of a tokamak, in the presence of dust. Appropriate fluid model equations for the nonlinear interchange mode in a dusty plasma are derived, accounting for the attachment of electrons and ions, as well as for...

  • Zonal flow in a tokamak pedestal. Kagan, Grigory; Catto, Peter J. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p056105 

    Neoclassical shielding is the dominant mechanism reducing the collisionless zonal flow in a tokamak. Previously, this phenomenon was analyzed in the case of an essentially homogeneous equilibrium since the wavelength of the zonal flow perturbation was assumed to be much less than the scale...

  • Low-energy high flux reactive ion etching by rf magnetron plasma. I, Lin; Hinson, D. C.; Class, W. H.; Sandstrom, R. L. // Applied Physics Letters;1984, Vol. 44 Issue 2, p185 

    The magnetron plasma etching of SiO2 and Si in fluorocarbon gas has been investigated. The plasma has high ionization degree, collisionless high density, and low energy ion flux (I∼1.0 mA/cm2, 30<=Ei <=250 eV at 1 W/cm2) and a controllable etch uniformity. The bulk of the plasma supports an...

  • Larmor electric field observed at the Earth's magnetopause by Polar satellite. Koga, D.; Gonzalez, W. D.; Mozer, F. S.; Silveira, M. V. D.; Cardoso, F. R. // Physics of Plasmas;2014, Vol. 21 Issue 10, p1 

    associated with asymmetric reconnection at the Earth's dayside magnetopause using Polar observations. On March 29, 2003, Polar satellite detected an asymmetric collisionless reconnection event. This event shows a unipolar Hall electric field signature and a simple deviation from the guide field...

  • Gyrokinetic studies of microinstabilities in the reversed field pinch. Carmody, D.; Pueschel, M. J.; Terry, P. W. // Physics of Plasmas;May2013, Vol. 20 Issue 5, p052110 

    An analytic equilibrium, the Toroidal Bessel Function Model, is used in conjunction with the gyrokinetic code GYRO to investigate the nature of microinstabilities in a reversed field pinch plasma. The effect of the normalized electron plasma pressure β on the characteristics of the...

  • Particle-in-cell simulation of collisionless undriven reconnection with open boundaries. Klimas, Alex; Hesse, Michael; Zenitani, Seiji // Physics of Plasmas;Apr2012, Vol. 19 Issue 4, p042901 

    The results are discussed of a 2½ dimensional, undriven, fully open-boundary particle-in-cell simulation of symmetric, anti-parallel reconnection. It is shown that the reconnection rate as measured by the strength of the out-of-plane electric field component at the dominant x-line is fast and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics