Splitting of the m=n=1 modes in hybrids with qmin<1

Marchenko, V. S.; Reznik, S. N.
August 2010
Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p084503
Academic Journal
The frequency splitting between m=n=1 eigenmodes in tokamak discharges with two q=1 surfaces and sheared toroidal rotation has been calculated. The instability domain of the “doublet” in the parameter space has been established for the first time. The results are consistent with observations of the frequency splitting in ASDEX Upgrade [O. Gruber et al., Nucl. Fusion 39, 1321 (1999)] and DIII-D [J. Luxon, Nucl. Fusion 42, 614 (2002)] tokamaks.


Related Articles

  • Simulations of global electrostatic microinstabilities in ASDEX Upgrade discharges. Bottino, A.; Peeters, A.G.; Sauter, O.; Vaclavik, J.; Villard, L. // Physics of Plasmas;Jan2004, Vol. 11 Issue 1, p198 

    Electrostatic microinstabilities in ion internal barrier (ITB) and H-mode discharges of the ASDEX Upgrade tokamak [O. Gruber, R. Arslanbekov, C. Atanasiu et al., Nucl. Fusion 41, 1369 (2001)] have been investigated with a full radius gyrokinetic code. The code models linear stability and...

  • Ion temperature gradient driven transport in tokamaks with square shaping. Joiner, N.; Dorland, W. // Physics of Plasmas;Jun2010, Vol. 17 Issue 6, p062306 

    Advanced tokamak schemes which may offer significant improvement to plasma confinement on the usual large aspect ratio Dee-shaped flux surface configuration are of great interest to the fusion community. One possibility is to introduce square shaping to the flux surfaces. The gyrokinetic code...

  • The influence of an ITER-like wall on disruptions at JET. de Vries, P. C.; Baruzzo, M.; Hogeweij, G. M. D.; Jachmich, S.; Joffrin, E.; Lomas, P. J.; Matthews, G. F.; Murari, A.; Nunes, I.; Pütterich, T.; Reux, C.; Vega, J. // Physics of Plasmas;May2014, Vol. 21 Issue 5, p056101-1 

    In order to preserve the integrity of large tokamaks such as ITER, the number of disruptions has to be limited. JET has operated previously with a low frequency of disruptions (i.e., disruption rate) of 3.4% [P. C. de Vries et al., Nucl. Fusion 51, 053018 (2011)]. The start of operations with...

  • A geometry interface for gyrokinetic microturbulence investigations in toroidal configurations. Xanthopoulos, P.; Cooper, W. A.; Jenko, F.; Turkin, Yu.; Runov, A.; Geiger, J. // Physics of Plasmas;Aug2009, Vol. 16 Issue 8, p082303 

    The GENE/GIST code package is developed for the investigation of plasma microturbulence, suitable for both stellarator and tokamak configurations. The geometry module is able to process typical equilibrium files and create the interface for the gyrokinetic solver. The analytical description of...

  • The role of kinetic effects, including plasma rotation and energetic particles, in resistive wall mode stability. Berkery, J. W.; Sabbagh, S. A.; Reimerdes, H.; Betti, R.; Hu, B.; Bell, R. E.; Gerhardt, S. P.; Manickam, J.; Podestà, M. // Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p082504 

    The resistive wall mode (RWM) instability in high-beta tokamaks is stabilized by energy dissipation mechanisms that depend on plasma rotation and kinetic effects. Kinetic modification of ideal stability calculated with the “MISK” code [B. Hu et al., Phys. Plasmas 12, 057301 (2005)]...

  • A Phenomenological Model of the Current Filamentation Instability Driven by Cathode Processes in the Livermore Spheromak. Ryutov, D. D.; Cohen, R. H.; Hill, D. N. // Plasma Physics Reports;Jul2003, Vol. 29 Issue 7, p605 

    The current density on the open field lines of the Livermore spheromak (SSPX) typically exceeds the saturation current density of the bulk plasma. We assume that the mechanism that provides conditions for that is associated with the formation of a thin layer near the cathode surface, where both...

  • Asymmetric radiation-induced toroidal flow and improved confinement in tokamaks. Singh, R.; Kaw, P. K.; Rogister, A. L.; Tangri, V. // Physics of Plasmas;Apr2006, Vol. 13 Issue 4, p042505 

    The role of impurity radiation in influencing the toroidal flow and radial electric fields (parameters critical for determining turbulent transport) has been studied on the edge of a tokamak plasma. It is demonstrated for the first time that the impurities distributed in an asymmetric...

  • Extension and comparison of neoclassical models for poloidal rotation in tokamaks. Stacey, W. M. // Physics of Plasmas;Jan2008, Vol. 15 Issue 1, p012501 

    Several neoclassical models for the calculation of poloidal rotation in tokamaks were rederived within a common framework, extended to include additional physics and numerically compared. The importance of new physics phenomena not usually included in poloidal rotation calculations (e.g.,...

  • Full-Wave Studies of Lower Hybrid Wave Propagation in Tokamaks. Bonoli, P. T.; Wright, J. C.; Richardson, A. S.; Schmidt, A. E.; Phillips, C. K.; Valeo, E. // AIP Conference Proceedings;11/26/2009, Vol. 1187 Issue 1, p359 

    A full-wave electromagnetic field solver valid the lower hybrid range of frequencies (LHRF) has been developed that utilizes a semi-spectral representation for the RF electric field. Spurious numerical behavior of the field solver that was found to be related to the inclusion of finite electron...


Read the Article


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

Try another library?
Sign out of this library

Other Topics