Electromagnetic Gyrokinetic Turbulence Simulation

Code Description

Gem is a comprehensive electromagnetic gyrokinetic delta-f particle code that includes the full dynamics of gyrokinetic ions and drift-kinetic electrons. Magnetic perturbations perpendicular to the equilibrium field are fully modeled. The simulation is useful for studying well-magnetized plasma physics and is especially powerful because it is accurate at very-low fluctuation levels. Electron-ion collisions are included as well as the full-capability to model general axisymmetric toroidal equilibria.

Contact info: Yang Chen, 303-492-3664


Publications on GEM

Global gyrokinetic simulations of the H-mode tokamak edge pedestal, W. Wan, S. E. Parker, Y. Chen, R. J. Groebner, Z. Yan, A. Y. Pankin, and S. E. Kruger, Phys. Plasmas 20, 055902 (2013) pdf

Comparison of Kinetic and Extended MHD Computational Models for the Linear Ion Temperature Gradient Instability in Slab Geometry, Dalton D. Schnack, Jianhua Cheng, Daniel Barnes and Scott Parker, Phys. Plasmas, Accepted 07 May 2013 pdf

Gyrokinetic simulations of reverse shear Alfvén eigenmodes in DIII-D plasmas, Y. Chen, T. Munsat, S. E. Parker, W. W. Heidbrink, M. A. Van Zeeland, B. J. Tobias, and C. W. Domier, Phys. Plasmas 20, 012109 (2013) pdf

Linear gyrokinetic analysis of a DIII-D H-mode pedestal near the ideal ballooning threshold, E. Wang, X. Xu, J. Candy, R. J. Groebner, P. B. Snyder, Y. Chen, S. E. Parker, W. Wan, G. Lu , and J. Q. Dong, Nucl. Fusion 52, 103015 (2012) pdf

Global Gyrokinetic Simulation of Tokamak Edge Pedestal Instabilities, W. Wan, S. E. Parker, Y. Chen, Z. Yan, R. J. Groebner, and P. B. Snyder, Phys. Rev. Lett. 109, 185004 (2012) pdf

The pinch of cold ions from recycling in the tokamak edge pedestal, W. Wan, S. E. Parker, Y. Chen, G.-Y. Park, C.-S. Chang, and D. Stotler, Phys. Plasmas 18, 056116 (2011) pdf

Fluid electrons with kinetic closure for long wavelength energetic particles driven modes, Y. Chen and S. E. Parker, Phys. Plasmas 18, 055703 (2011) pdf

L-mode validation studies of gyrokinteic turbulence simulations via multiscale and multifield turbulence measurements on the DIII-D tokamak, T.L. Rhodes, C. Holland, S.P. Smith, A.E. White, K.H. Burrell, J. Candy, J.C. DeBoo, E.J. Doyle, J.C. Hillesheim, J.E. Kinsey, G.R. McKee, D. Mikkelsen, W.A. Peebles, C.C. Petty, R. Prater, S. Parker, Y. Chen, L. Schmitz, G.M. Staebler, R.E. Waltz, G. Wang, Z. Yan and L. Zeng, Nucl. Fusion 51, 063022 (2011) pdf

Linear gyrokinetic simulation of high-n toroidal Alfvén eigenmodes in a burning plasma, Y. Chen, S. E. Parker, J. Lang and G.-Y. Fu, Phys. Plasmas 17, 102504 (2010) pdf

Natural fueling of a tokamak fusion reactor, W. Wan, S. E. Parker, Y. Chen and F.W. Perkins, Phys. Plasmas 17, 040701 (2010) pdf

Gyrokinetic delta-f particle simulations of toroidicity-induced Alfvén eigenmode, J. Lang, Y. Chen, S. E. Parker, and G.-Y. Fu, Phys. Plasmas 16, 102101 (2009) pdf

Particle-in-Cell simulation with Vlasov ions and drift-kinetic electrons, Y. Chen & S. E. Parker, Phys. Plasmas 16, 052305 (2009) pdf

Role of zonal flows in TEM turbulence through nonlinear gyrokinetic particle and continuum simulation, D.R. Ernst, J. Lang, W. Nevins, M. Hoffman, Y. Chen, W. Dorland and S. Parker,  Phys. Plasmas 16, 055906 (2009) (pdf)

Low-noise particle algorithms for extended magnetohydrodynamic closure, D.C. Barnes, J. Cheng and S. E. Parker, Phys. Plasmas 15, 055702 (2008) pdf

Nonlinear saturation of  collisionless trapped electron mode turbulence: zonal flows and zonal  density, J. Lang, Y. Chen and S. E. Parker, Phys. Plasmas 15, 055907 (2008) (pdf)

Coarse-graining the electron distribution in turbulence simulations of tokamak plasmas, Y. Chen, S. E. Parker, G. Rewoldt, S. Ku, G. Y. Park & C-S. Chang, Phys. Plasmas 15, 055905 (2008) (pdf)

Verification of gyrokinetic delta-f simulations of electron temperature gradient turbulence, B. Nevins, Y. Chen and S. E. Parker, Physics of Plasmas 14, 084501 (2007) (pdf)

Gyrokinetic delta-f particle simulation of trapped electron mode driven turbulence, J. Lang, Y. Chen and S. Parker, Physics of Plasmas 14, 082315 (2007). pdf

Coarse-graining phase space in delta-f particle-in-cell simulations, Y. Chen and S. Parker, Physics of Plasmas 14, 082301 (2007). pdf

Electromagnetic gyrokinetic delta-f particle-in-cell turbulence simulation with realistic equilibrium profiles and geometry, Y. Chen and S. Parker, J. of Comp. Phys. 220 839 (2007). pdf

Fine-scale zonal flow suppression of electron temperature gradient turbulence, S. Parker, J. Kohut, Y. Chen, Z. Lin, F. Hinton, W. Lee, AIP Conference Proceedings 871 193-203 (2006). pdf

Arbitrary plasma shape and trapped electron modes in the GEM gyrokinetic electromagnetic turbulence simulation code, Y. Chen, S. Parker, J. Lang, Journal of Physics: Conference Series 46 92-96 (2006). pdf

Relevance of the parallel nonlinearity in gyrokinetic simulations of tokamak plasmas, J. Candy, R. Waltz, S. Parker, Y. Chen, Phys. Plasmas 13 074501 (2006). pdf

Gyrokinetic delta-f simulation of the collisionless and semicollisonal tearing mode instability, W. Wan, Y. Chen and S. Parker, Phys. Plasmas 12 012311-1 (2005). pdf

Electromagnetic gyrokinetic simulations, S. Parker, Y. Chen and W. Wan, Phys. Plasmas 11 2594 (2004). pdf

The particle-continuum method: an algorithmic unification of particle-in-cell and continuum methods, S. Vadlamani, S. Parker, Y. Chen and C. Kim, Comp. Phys. Comm., 164 209 (2004). pdf

A delta-f particle method for gyrokinetic simulations with kinetic electrons and electromagnetic perturbuations, Y. Chen and S. Parker, J. Comput. Phys. 189 463 (2003). pdf

Simulations of turbulent transport with kinetic electrons and electromagnetic effects, Y. Chen, S. Parker, B. Cohen, A. Dimits, W. Nevins, D. Shumaker, V. Decyk and J. Leboeuf, Nucl. Fusion 43 1121 (2003). pdf

Gyrokinetic simulations with kinetic electrons, Y. Chen and S. Parker, Phys. Plasmas 8 2095 (2001). pdf

A gyrokinetic ion zero electron inertia fluid electron model for turbulence simulations, Y. Chen and S. Parker, Phys. Plasmas 8 441 (2001). pdf

Electromagnetic gyrokinetic ion drift-fluid-electron hybrid simulation, S. Parker, Y. Chen and C. Kim, Comp. Phys. Comm. Phs. 127 59 (2000). pdf

Large-scale gyrokinetic turbulence simulations: Effects of profile variation, S. Parker, C. Kim and Y. Chen, Phys. Plasmas 6 1709 (1999). pdf