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Contents 1 Theory and simulation of energetic particle dynamics and ensuing collective behaviors in fusion plasmas 2 1. Objectives of the NLED project 2015-17 3 2. Main ongoing research activities in 2015 4 3. Publications/presentations in 2015 5 4. Publications/presentations in 2014

Theory and simulation of energetic particle dynamics and ensuing collective behaviors in fusion plasmas

Principal Investigator:

Fulvio Zonca

Project Participants:

Alessandro Biancalani, Alberto Bottino, Matthias Borchardt, Sergio Briguglio, Nakia Carlevaro, Michael Cole, Claudio Di Troia, Remi Dumont, Giuliana Fogaccia, Valeria Fusco, Xavier Garbet, Ralf Kleiber, Axel Koenies, Philipp Lauber, Alexander Milovanov, Oleksiy Mishchenko, Giovanni Montani, Mirjam Schneller, Gregorio Vlad, Xin Wang, David Zarzoso

Participating Research Institutions:

Aix Marseille Univerity, CEA Cadarache, ENEA Frascati, IPP Garching, IPP Greifswald

1. Objectives of the NLED project 2015-17

The main aim of this project proposal is to assess the essential physics elements for successful numerical simulation of Alfvénic fluctuations and energetic particle behaviors in fusion plasmas. A variety of numerical codes adopting both gyrokinetic as well as hybrid fluid-kinetic approaches will be employed to accomplish this task. Reference plasma scenarios, including these fundamental processes, will be extracted from experimental observations for carrying out numerical studies in conditions of practical interest. Meanwhile, the use of physical models of increasing complexity within numerical simulation codes will allow to clearly identify the importance of accounting for realistic plasma nonuniformity and magnetic field geometry for successful comparisons of numerical simulation results with experimental observations. Furthermore, benchmarking of codes developed for analyzing these physics in tokamak and stellarator devices will provide deeper insights.

Standardized numerical diagnostics, in particular for energetic-particle phase-space, have been developed as part of the 2014 NLED ER Project; and are foreseen as essential ingredient of this project proposal as well as prerequisite for verification of numerical simulation results and code benchmarking for both linear and nonlinear dynamics. Linear simulations will be focused on benchmarking numerical simulations of different types of Alfvénic oscillations with perturbative and non-perturbative fast particle drive; and on the analysis of electron- fishbone stability properties. Meanwhile, nonlinear simulations will address perturbative analyses of multi-mode (Alfvén Eigenmode) scenarios including realistic damping, as well as nonlinear electron-fishbone saturation and self-consistent supra-thermal electron transport. For long time-scale simulations, realistic energetic particle sources and collisions will be taken into account.

2. Main ongoing research activities in 2015

3. Publications/presentations in 2015

[1] X. Wang et al. Structure of wave-particle interactions in nonlinear beta induced Alfvén eigenmode dynamics. Invited talk at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[2] Ph. Lauber. Local and Global Kinetic Stability Analysis of Alfvén Eigenmodes in the 15 MA ITER Scenario. Plasma Phys. Control. Fus. 57, 054011 (2015). PDF (70% NLED support)

[3] S. D. Pinches and Ph. Lauber et al. Energetic Ions in ITER Plasmas. Physics of Plasmas 22, 021807 (2015). PDF (20% NLED support)

4. Publications/presentations in 2014

[1] F. Zonca and L. Chen, Theory on excitations of drift Alfvén waves by energetic particles. I. Variational formulation. Phys. Plasmas 21, 072120 (2014). PDF (50% NLED support)

[2] F. Zonca and L. Chen, Theory on excitations of drift Alfvén waves by energetic particles. II. The general fishbone-like dispersion relation. Phys. Plasmas 21, 072121 (2014). PDF (50% NLED support)

[3] F. Zonca et al. Energetic particles and multi-scale dynamics in fusion plasmas. Plenary invited presentation at the 41.st EPS Conference on Plasma Physics, Berlin, Germany, June 23 - 27 June (2014); and Plasma Phys. Contr. Fusion 57, 014024 (2015). PDF (80% NLED support)

[4] F. Zonca et al. Nonlinear dynamics of phase space zonal structures and energetic particle physics in fusion plasmas. To be published in New. J. Phys (2015). PDF (80% NLED support)

[5] S. Briguglio et al. Analysis of the nonlinear behavior of shear-Alfvén modes in tokamaks based on Hamiltonian mapping techniques, Physics of Plasmas 21, 112301 (2014). PDF

[6] X. Wang et al. Studies of nonlinear dynamics of wave-particle interactions in Tokamak plasmas based on Hamiltonian mapping techniques. Invited presentation at the Joint Varenna - Lausanne International Workshop on Theory of Fusion Plasmas, Varenna, Italy, September 1 - 5 (2014). PDF

[7] X. Wang et al. Structure of wave-particle interactions in nonlinear beta induced Alfvén eigenmode dynamics. Invited talk to be presented at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[8] J.-B. Girardo et al. Relation between energetic and standard geodesic acoustic modes, Phys. Plasmas 21, 092507 (2014). PDF (50% NLED support)

[9] D. Zarzoso et al. Analytic dispersion relation of energetic particle driven geodesic acoustic modes and simulations with NEMORB, Nucl. Fusion 54, 103006 (2014). PDF (50% NLED support)

[10] A. Biancalani et al. Global Gyrokinetic Modeling of Geodesic Acoustic Modes and Shear Alfvén Instabilities in ASDEX Upgrade. Presented at the 25^th IAEA Fusion Energy Conference, Saint Petersburg, Russia, Oct. 13 – 18, 2014. Paper EX/P1-18. PDF

[11] G. Fogaccia et al. Linear benchmark activity of HYMAGYC code. To be presented at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[12] V. Fusco et al. Analysis of the electron fishbone instability with the XHMGC code. To be presented at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[13] C. Di Troia et al. Effects of ECRH-like and LHH-like anisotropies in phase space on electron fishbone resonant excitation. To be presented at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[14] C. Di Troia and A. Biancalani, Bayesian derivation of plasma equilibrium distribution function for tokamak scenarios. Presented at the 25^th IAEA Fusion Energy Conference, Saint Petersburg, Russia, Oct. 13 – 18, 2014. Paper TH/P7-6. PDF

[15] C. Di Troia.Bayesian derivation of plasma equilibrium distribution function for tokamak scenarios and the associated Landau Collision operator. Submitted to Nucl. Fusion.

[16] F. Zonca et al. Role of phase locking in nonlinear dynamics of fishbones and EPMs. Paper BP8.00039, Bull. Am. Phys. Soc. 59, No. 15, (2014). PDF

[17] S. D. Pinches and Ph. Lauber et al. Energetic Ions in ITER Plasmas. Submitted to Physics of Plasmas, 2014. (20% NLED support)

[18] Ph. Lauber et al. Kinetic Models for Energetic Particle Physics in Tokamaks - Verification, Validation and Predictions for ITER. Presented at the Joint Varenna - Lausanne International Workshop on Theory of Fusion Plasmas, Varenna, Italy, September 1 - 5 (2014). PDF (50% NLED support).

[19] Ph. Lauber. Local and Global Kinetic Stability Analysis of Alfvén Eigenmodes in the 15 MA ITER Scenario. Submitted to Plasma Physics and Controlled Fusion, 2014. (70% NLED support)

[20] M. Schneller et al. Study of Nonlinear Fast Particle Transport and Losses in the Presence of Alfvén Waves. Presented at the Joint Varenna - Lausanne International Workshop on Theory of Fusion Plasmas, Varenna, Italy, September 1 - 5 (2014). PDF (80% NLED support)

[21] M. Schneller et al. Study of Nonlinear Fast Particle Transport in the Presence of Alfvén Waves for the ITER 15 MA Scenario. Presented at the 25^th IAEA Fusion Energy Conference, Saint Petersburg, Russia, Oct. 13 – 18, 2014, Paper TH/P2-06. PDF (80% NLED support)

[22] N. Carlevaro, G. Montani et al. Transport features in a multi-resonance beam-plasma system. To be presented at the 7^th IAEA Technical Meeting on Plasma Instabilities, Frascati, Italy, March 4-6, 2015. PDF

[23] S. Briguglio et al. Nonlinear dynamics of the n=6 TAE: comparison between HMGC, HAGIS and EUTERPE results. Presented at the 13th Meeting of the ITPA Energetic Particle Topical Group (Joint Meeting of ITPA MHD, Disruptions & Control and Energetic Particle Physics Topical Groups) Oct 21- 23, 2014, Padova, Italy. PDF

[24] A. Mishchenko et al. Gyrokinetic particle-in-cell simulations of Alfvén eigenmodes in presence of continuum effects, Phys. Plasmas 21, 052114 (2014). PDF

[25] A. Mishchenko et al. New variables for gyrokinetic electromagnetic simulations, Phys. Plasmas 21, 052113 (2014). PDF (60% NLED support)

[26] M. Cole et al. Fluid electron, gyrokinetic ion simulations of linear internal kink and energetic particle modes, Phys. Plasmas 21, 072123 (2014). PDF

[27] A. Mishchenko et al. Pullback transformation in gyrokinetic electromagnetic simulations, Phys. Plasmas 21, 092110 (2014). PDF (60% NLED support)

[28] A. Mishchenko et al. Global hybrid-gyrokinetic simulations of fast-particle effects on Alfvén Eigenmodes in stellarators, Nucl. Fusion 54, 104003 (2014). PDF

[29] A. Mishchenko et al. Global gyrokinetic particle-in-cell simulations of Alfvénic modes. Presented at the 25^th IAEA Fusion Energy Conference, Saint Petersburg, Russia, Oct. 13 – 18, 2014. Paper TH/P4-49.PDF (70% NLED support)

[30] M. Cole et al. A hierarchy of models for numerical simulation of global modes. Presented at the Joint Varenna - Lausanne International Workshop on Theory of Fusion Plasmas, Varenna, Italy, September 1 - 5 (2014). PDF

[31] A. Könies et al. A non-linear Hybrid MHD-gyrokinetic Model with fixed mode structure in stellarator geometry. Presented at the 12th Meeting of the ITPA Energetic Particle Topical Group, Mar. 31 – Apr. 3, 2014, Madrid, Spain. PDF

[32] M. Cole et al. Fluid electron, kinetic ion simulations of Alfvénic instabilities Presented at the 12th Meeting of the ITPA Energetic Particle Topical Group, Mar. 31 – Apr. 3, 2014, Madrid, Spain. PDF