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Publications

2024

Controls and Optimization

Presentations

  • "Accurate ECH Deposition With Real-time TORBEAM and ECH Mirror Feedback Control," A. Rothstein, K. Erickson, S.K. Kim, A. Bortolon, and E. Kolemen, DIII-D SET Meeting, July 2024,

Papers

  • "Advanced Magnetic Divertor Control," E. Kolemen, Nuclear Fusion, July 2024,

  • "Advanced Magnetic Divertor Control," E. Kolemen, Nuclear Fusion, July 2024,

  • "Physics-Based Real-time Analysis and Control to Achieve Transient-Free Operations for the ITER Era," E. Kolemen, Nuclear Fusion, July 2024,

  • "Stellarator Optimization with Constraints," R. Conlin, P. Kim, D. W. Dudt, D. Panici, and E. Kolemen, Journal of Plasma Physics, March 2024,

  • "Optimization of Nonlinear Turbulence in Stellarators," P. Kim, S. Buller, R. Conlin, W. Dorland, D. W. Dudt, R. Gaur, R. Jorge, E. Kolemen, M. Landreman, N. R. Mandell, and D. Panici, Journal of Plasma Physics, February 2024,

  • "Magnetic Fields with General Omnigenity," D. W. Dudt, A. G. Goodman, R. Conlin, D. Panici, and E. Kolemen, Journal of Plasma Physics, January 2024,

Machine Learning

Papers

  • "Full Shot Predictions for the DIII-D Tokamak via Deep Recurrent Networks," I. Char, Y. Chung, J. Abbate, E. Kolemen, and J. Schneider, IEEE Transactions on Plasma Science, April 2024,

  • "Avoiding Fusion Plasma Tearing Instability with Deep Reinforcement Learning," E. Kolemen et al., Nature, February 2024,

  • "Automated Experimental Design of Safe Rampdowns via Probabilistic Machine Learning," V. Mehta, J. Barr, J. Abbate, M. D. Boyer, I. Char, W. Neiswanger, E. Kolemen, and J. Schneider, Nuclear Fusion, February 2024,

  • "Avoiding Fusion Plasma Tearing Instability with Deep Reinforcement Learning," J. Seo, S. Kim, A. Jalalvand, R. Conlin, A. Rothstein, J. Abbate, K. Erickson, J. Wai, R. Shousha, and E. Kolemen, None, February 2024,

2023

Controls and Optimization

Papers

  • "Omnigenity Optimization," D. Dudt, A. Goodman, R. Conlin, D. Panici, R. Gaur, and E. Kolemen, Simons Retreat, December 2023,

  • "Corrigendum: Integrated RMP-based ELM-crash-control Process for Plasma Performance Enhancement During ELM Crash Suppression in KSTAR," M. Kim et al., International Atomic Energy Agency Nuclear Fusion, November 2023,

  • "Transition in Particle Transport Under Resonant Magnetic Perturbations in a Tokamak," S. K. Kim et al., International Atomic Energy Agency Nuclear Fusion, September 2023,

  • "Integrated RMP-based ELM-crash-control Process for Plasma Performance Enhancement During ELM Crash Suppression in KSTAR," M. Kim, G. Shin, J. Lee, W. H. Ko, H. Han, S.-H. Hahn, S. K. Kim, S. M. Yang, R. Shousha, H. S. Kim, J.-W. Juhn, G. Y. Park, and E. Kolemen, International Atomic Energy Agency Nuclear Fusion, July 2023,

  • "GSPD: An Algorithm for Time-Dependent Tokamak Equilibria Design," J. T. Wai, and E. Kolemen, None, June 2023,

  • "The DESC Stellarator Code Suite Part 2: Perturbation," R. Conlin, D. W. Dudt, D. Panici, and E. Kolemen, Journal of Plasma Physics, April 2023,

  • "The Desc Stellarator Code Suite Part 3: Quasisymmetry Optimization," D. Dudt, R. Conlin, D. Panici, and E. Kolemen, Journal of Plasma Physics, March 2023,

  • "Offline Model-Based Reinforcement Learning for Tokamak Control," I. Char, J. Abbate, L. Bardóczi, M. D. Boyer, Y. Chung, R. Conlin, K. Erickson, V. Mehta, N. Richner, E. Kolemen, and J. Schneider, 5th Annual Conference on Learning for Dynamics and Control, January 2023,

  • "Offline Model-Based Reinforcement Learning for Tokamak Control," I. Char, J. Abbate, L. Bardóczi, M. D. Boyer, Y. Chung, R. Conlin, K. Erickson, V. Mehta, N. Richner, E. Kolemen, and J. Schneider, NeurIPS, January 2023,

Machine Learning

Papers

  • "Machine Learning-Based Real-Time Kinetic Profile Reconstruction in DIII-D," R. Shousha, J. Seo, K. Erickson, Z. Xing, S. Kim, J. Abbate, and E. Kolemen, None, December 2023,

  • "Comparison of Machine Learning Systems Trained to Detect Alfvén Eigenmodes Using the CO2 Interferometer on DIII-D," A. V. Garcia, A. Jalalvand, P. Steiner, A. Rothstein, M. Van Zeeland, W. W. Heidbrink, and E. Kolemen, Nuclear Fusion, October 2023,

  • "Alfvén Eigenmode Detection Using Long-Short Term Memory Networks and CO2 Interferometer Data on the DIII-D National Fusion Facility," A. V. Garcia, A. Jalalvand, P. Steiner, A. Rothstein, M. Van Zeeland, W. W. Heidbrink, and E. Kolemen, International Joint Conference on Neural Networks, July 2023,

  • "Towards LLMs as Operational Copilots for Fusion Reactors," V. Mehta, J. Abbate, A. M. Wang, A. Rothstein, I. Char, J. Schneider, E. Kolemen, C. Rea, and D. T. Garnier, NeurIPS 2023 AI for Science Workshop, July 2023,

  • "Multimodal Prediction of Tearing Instabilities in a Tokamak," J. Seo, R. Conlin, A. Rothstein, S. Kim, J. Abbate, A. Jalalvand, and E. Kolemen, None, April 2023,

Liquid Metals

Papers

  • "Experimental, Numerical and Analytical Evaluation of Thrust for Fast-Liquid-Metal-Flow Divertor Systems of Nuclear Fusion Devices," F. Saenz, A. E. Fisher, J. Al-Salami, B. Wynne, Z. Sun, T. Tanaka, T. Kunugi, J. Yagi, K. Kusumi, Y. Wu, G. Yamazaki, C. Hu, K. Hanada, and E. Kolemen, None, August 2023,

  • "Magnetohydrodynamics in Free Surface Liquid Metal Flow Relevant to Plasma-Facing Components," Z. Sun, J. Al Salami, A. Khodak, F. Saenz, B. Wynne, R. Maingi, K. Hanada, C. H. Hu, and E. Kolemen, None, June 2023,

Special Topics

Papers

  • "The Value of Fusion Energy to a Decarbonized United States Electric Grid," J. A. Schwartz, W. Ricks, E. Kolemen, and J. D. Jenkins, None, April 2023,

  • "The DESC Stellarator Code Suite. Part 1. Quick and Accurate Equilibria Computations," D. Panici, R. Conlin, D. W. Dudt, K. Unalmis, and E. Kolemen, Journal of Plasma Physics, March 2023,

  • "Impact of CH4 Addition on the Electron Properties and Electric Field Dynamics in a AR Nanosecond-Pulsed Dielectric Barrier Discharge," T. Y. Chen, X. Mao, H. Zhong, Y. Lin, N. Liu, B. M. Goldberg, Y. Ju, and E. Kolemen, Plasma Sources Science and Technology, January 2023,

2022

Special Topics

Papers

  • "Gyrokinetic Analysis of Inter-Edge Localized Mode Transport Mechanisms in a DIII-D Pedestal," M. R. Halfmoon et al., Physics of Plasmas, November 2022,

  • "Simultaneous Single Shot Rotation-Vibration Non-equilibrium Hermometry Using Pure Rotational fs/ps Cars Coherence Beating," T. Y. Chen, N. Liu, C. J. Kliewer, A. Dogariu, E. Kolemen, and Y. Ju, Optics Letters, September 2022,

  • "To Dee or Not to Dee: Costs and Benefits of Altering the Triangularity of a Steady-State DEMO-Like Reactor," J. A. Schwartz, A. O. Nelson, and E. Kolemen, None, May 2022,

  • "DIII-D Research Advancing the Physics Basis for Optimizing the Tokamak Approach to Fusion Energy," M. E. Fenstermacher, and et al., International Atomic Energy Agency Nuclear Fusion, April 2022,

  • "NSTX-U Theory, Modeling and Analysis Results," W. Guttenfelder et al., Nuclear Fusion, March 2022,

Controls and Optimization

Papers

  • "A General Infrastructure for Data-Driven Control Design and Implementation in Tokamaks," J. Abbate, R. Conlin, R. Shousha, K. Erickson, and E. Kolemen, Journal of Plasma Physics, October 2022,

  • "Efficient Stellarator Optimization and Analysis with DESC," D. Dudt, R. Conlin, D. Panici, P. Kim, K. Unalmis, and E. Kolemen, APS DPP, October 2022,

  • "Feedforward+Feedback Shape Control Design on NSTX-U," J. Wai, M. D. Boyer, W. Wehner, A. S. Welander, and E. Kolemen, None, October 2022,

  • "Nonlinear MHD Modeling of n=1 RMP-Induced Pedestal Transport and Mode Coupling Effects on ELMSuppression in KSTAR," S. K. Kim et al., International Atomic Energy Agency Nuclear Fusion, September 2022,

  • "Neural Net Modeling of Equilibria in NSTX-U," J. T. Wai, M. D. Boyer, and E. Kolemen, None, July 2022,

  • "Design and Experimental Demonstration of Feedback Adaptive RMP ELM Controller Toward Complete Long Pulse ELM Suppression on KSTAR," R. Shousha, S. K. Kim, K. G. Erickson, S. H. Hahn, A. O. Nelson, S. M. Yang, J.-K. Park, J. Wai, Y. M. Jeon, J. H. Lee, J. Jang, D. Seo, and E. Kolemen, None, March 2022,

  • "Optimization of 3D Controlled ELM-Free State With Recovered Global Confinement for KSTAR With n=1 Resonant Magnetic Field Perturbation," S. K. Kim et al., International Atomic Energy Agency Nuclear Fusion, January 2022,

Machine Learning

Papers

  • "Exploring Data-driven Models for Spatiotemporally Local Classification of Alfven Eigenmodes," A. A. Kaptanoglu et al., International Atomic Energy Agency Nuclear Fusion, August 2022,

  • "Real-Time and Adaptive Reservoir Computing With Application to Profile Prediction in Fusion Plasma," A. Jalalvand, J. Abbate, R. Conlin, G. Verdoolaege, and E. Kolemen, IEEE Transactions on Neural Networks and Learning Systems, June 2022,

Liquid Metals

Papers

  • "Divertorlets Concept for Low-Recycling Fusion Reactor Divertor: Experimental, Analytical and Numerical Verification," F. Saenz, Z. Sun, A. E. Fisher, B. Wynne, and E. Kolemen, None, June 2022,

  • "Liquid Metal Flow Controls at Liquid Metal Experiment," M. Modestov, E. Kolemen, E. P. Gilson, J. A. Hinojosa, H. Ji, T. Kunugi, and R. Majeski, None, March 2022,

2021

Special Topics

Papers

  • "Rotation-Vibration Non-equilibrium Measurement Using Pure Rotational fs/ps Cars Coherence Beating," T. Y. Chen, N. Liu, A. Dogariu, E. Kolemen, and Y. Ju, Proceedings of the AIAA SciTech Forum, December 2021,

  • "Investigating ELM Pacing by Vertical Oscillations on DIII-D," D. Panici, A. O. Nelson, F. Laggner, and E. Kolemen, APS Division of Plasma Physics Meeting, November 2021,

  • "NSTX-U Feedforward Shape Control and Neural Net Dynamics Modeling," J. Wai, M. D. Boyer, and E. Kolemen, None, November 2021,

  • "Time-Dependent Experimental Identification of Inter-ELM Microtearing Modes in the Tokamak Edge on DIII-D," A. O. Nelson, F. M. Laggner, A. Diallo, D. Smith, Z. A. Xing, R. Shousha, and E. Kolemen, Nuclear Fusion, October 2021,

  • "Perturbative Determination of Plasma Microinstabilities in Tokamaks," A. O. Nelson, F. M. Laggner, A. Diallo, Z. A. Xing, D. R. Smith, and E. Kolemen, Physics of Plasmas, February 2021,

  • "Single Shot Burst Imaging of Electric Fields Measured by Split Excitation Electric Field Induced Second Harmonic Generation (SEE-FISH)," T. Y. Chen, B. M. Goldberg, E. Kolemen, and Y. Ju, AIAA SciTech Forum, January 2021,

  • "Spatially and Time-Resolved fs-ps Cars Measurements of Rotation-Vibration Non-equilibrium in a CH4-N2 Nanosecond-Pulsed Discharge," T. Y. Chen, B. M. Goldberg, C. J. Kliewer, E. Kolemen, and Y. Ju, AIAA SciTech Forum, January 2021,

  • "Spatially and Temporally Resolved fs/ps Cars Measurements of Rotation-Vibration Non-equilibrium in a CH4-N2 Nanosecond-Pulsed Discharge," T. Y. Chen, B. M. Goldberg, C. J. Kliewer, E. Kolemen, and Y. Ju, AIAA SciTech Forum, January 2021,

  • "Time and Frequency-Domain fs/ps Cars Measurements and Modelling of the CH4 V1 Vibrational Q-Branch," T. Y. Chen, B. M. Goldberg, E. Kolemen, Y. Ju, and C. J. Kliewer, AIAA SciTech Forum, January 2021,

Machine Learning

Papers

  • "Alfven Eigenmode Classification Based on ECE Diagnostics at DIII-D Using Deep Recurrent Neural Networks," A. Jalalvand et al., International Atomic Energy Agency Nuclear Fusion, December 2021,

  • "Neural Dynamical Systems: Balancing Structure and Flexibility in Physical Prediction," V. Mehta, I. Char, W. Neiswanger, Y. Chung, A. Nelson, M. D. Boyer, E. Kolemen, and J. Schneider, 60th IEEE Conference on Decision and Control (CDC), December 2021,

  • "Data-Driven Profile Prediction for DIII-D," J. Abbate, R. Conlin, and E. Kolemen, Nuclear Fusion, March 2021,

  • "Keras2c, a Library for Converting Keras Neural Networks to Real-Time Compatible C," R. Conlin, K. Erickson, J. Abbate, and E. Kolemen, Engineering Applications of Artificial Intelligence, January 2021,

Controls and Optimization

Papers

  • "Optimizing Edge Confinement and Stability via Adaptive ELM Control Using RMPs," S. K. Kim et al., APS-DPP 2021, November 2021,

  • "Effect of n=1 RMP-Driven Turbulence on Ion Pedestal and Its Role in Adaptive ELM Control in KSTAR," S. K. Kim, R. Shousha, S. H. Hahn, A. O. Nelson, J. Wai, S. M. Yang, J.-K. Park, Y. In, J. H. Lee, J. Kim, and E. Kolemen, 47th EPS Conference on Plasma Physics, November 2021,

  • "Optimization of 3D Controlled ELM-Free State With Recovered Global Confinement for Tokamak Fusion Plasmas," S. K. Kim et al., International Atomic Energy Agency Nuclear Fusion, July 2021,

  • "Initial Operation of a Real-Time Thomson Scattering Evaluation System on the Large Helical Device," K. C. Hammond et al., Review of Scientific Instruments, June 2021,

Liquid Metals

Papers

  • "Progress in a US-based Liquid Metal Plasma-Facing Component Design Activity for a Fusion Nuclear Science Facility," R. Maingi et al., Proceedings of the 2021 European Conference on Controlled Fusion and Plasma Physics, June 2021,

  • "Mitigation of Scrape-Off Layer Power Flow with Lithium Plasma-Facing Surfaces," R. Majeski, E. Kolemen, M. A. Dorf, T. D. Rognlien, V. A. Soukhanovskii, M. V. Umansky, and B. Garcia-Diaz, Proceedings of the 2021 European Conference on Controlled Fusion and Plasma Physics, June 2021,

2020

Liquid Metals

Papers

  • "Liquid Metal “Divertorlets” Concept for Fusion Reactors," A. E. Fisher, Z. Sun, and E. Kolemen, Nuclear Materials and Energy, December 2020,

  • "Status and Progress of the Domestic Liquid Metal Plasma-Facing Component Design Program," R. Maingi, A. Khodak, E. Kolemen, C. Kessel, J. Jun, J. Lore, B. Pint, D. Youchison, S. Smolentsev, D. Andruczyk, and D. Curreli, Magnetic Fusion Science Meeting, November 2020,

  • "A Domestic Program for Liquid Metal Pfc Research in Fusion," D. Andruczyk, R. Maingi, C. Kessel, D. Curreli, E. Kolemen, J. Canik, B. Pint, D. Youchison, and S. Smolentsev, Fusion Science and Technology, October 2020,

Special Topics

Papers

  • "Interpretative SOL Modeling Throughout Multiple ELM," A. O. Nelson, Z. A. Xing, O. Izacard, F. M. Laggner, and E. Kolemen, None, December 2020,

  • "CAKE: Consistent Automatic Kinetic Equilibrium Reconstruction," Z. A. Xing et al., None, December 2020,

  • "Time and Space Resolved Diagnostics for Plasma Thermal-Chemical Instability of Fuel Oxidation in Nanosecond Plasma Discharges," A. C. Rousso, B. M. Goldberg, T. Y. Chen, S. Wu, A. Dogariu, R. B. Miles, E. Kolemen, and Y. Ju, None, October 2020,

  • "Time-resolved in situ measurements and predictions of plasma-assisted methane reforming in a nanosecond-pulsed discharge," T. Y. Chen, T. S. Taneja, A. C. Rousso, S. Yang, E. Kolemen, and Y. Ju, Proceedings of the Combustion Institute, September 2020,

  • "1-D Imaging of Rotation-Vibration Non-equilibrium From Pure Rotational Ultrafast Coherent Anti-stokes Raman Scattering," T. Y. Chen, B. M. Goldberg, B. D. Patterson, E. Kolemen, Y. Ju, and C. J. Kliewer, None, July 2020,

  • "Experimental Evidence of Electron-Cyclotron Current Drive-Based Neoclassical Tearing Mode Suppression Threshold Reduction During Mode Locking on DIII-D," A. O. Nelson, N. C. Logan, W. Choi, E. J. Strait, and E. Kolemen, Plasma Physics and Controlled Fusion, July 2020,

  • "Neural Dynamical Systems," V. Mehta, I. Char, W. Neiswanger, Y. Chung, J. Schneider, A. O. Nelson, M. D. Boyer, and E. Kolemen, ICLR 2020 Integration of Deep Neural Models and Differential Equations Workshop, April 2020,

  • "Setting the H-mode Pedestal Structure: Variations of Particle Source Location Using Gas Puff and Pellet Fueling," A. O. Nelson, F. M. Laggner, R. Groebner, B. A. Grierson, O. Izacard, D. Eldon, M. W. Shafer, A. Leonard, D. Shiraki, A. C. Sontag, and E. Kolemen, Nuclear Fusion, February 2020,

  • "Time-Resolved Measurements of Electric Field, Electron Temperature, and Electron Density in a Nanosecond-Pulsed Dielectric Barrier Discharge," T. Y. Chen, B. M. Goldberg, A. C. Rousso, Y. Ju, and E. Kolemen, AIAA SciTech Forum, January 2020,

Machine Learning

Papers

  • "Physics and Machine Learning Based Approaches to Stability Analysis and Control on DIII-D," R. Conlin, J. Abbate, K. Erickson, A. S. Glasser, A. Wu, A. Iqtidar, and E. Kolemen, APS-DPP Meeting, November 2020,

  • "Advancing Fusion With Machine Learning Research Needs Workshop Report," D. Humphreys et al., Journal of Fusion Energy, September 2020,

  • "Machine Learning Control for Disruption and Tearing Mode Avoidance," Y. Fu, D. Eldon, K. Erickson, K. Kleijwegt, L. Lupin-Jimenez, M. D. Boyer, N. Eidietis, N. Barbour, O. Izacard, and E. Kolemen, Physics of Plasmas, February 2020,

Controls and Optimization

Papers

  • "DESC: An Efficient Stellarator Equilibrium Code," D. Dudt, and E. Kolemen, APS DPP, November 2020,

  • "Stellarator Equilibrium Construction Based on a Poincaré Sections Approach," D. Dudt, and E. Kolemen, APS DPP, November 2020,

  • "Developing Physics Basis to Optimize 3D-Edge Long-Pulse Tokamak Scenarios," J.-K. Park, C. Paz-Soldan, H. Frerichs, E. Kolemen, N. C. Logan, S. M. Yang, Q. M. Hu, C. Zhu, T. E. Evans, and O. Schmitz, 4th Asia-Pacific Conference on Plasma Physics, October 2020,

  • "Self-Consistent Optimization of Neoclassical Toroidal Torque with Anisotropic Perturbed Equilibrium in Tokamaks," J.-K. Park, N. C. Logan, Z. R. Wang, J. E. Menard, A. H. Glasser, A. H. Boozer, E. Kolemen, and Y. In, None, October 2020,

  • "Control Pathway for an Advanced Divertor on ITER," J. T. Wai, P. J. Vail, and E. Kolemen, None, August 2020,

  • "Control System Development for the Snowflake Divertor on NSTX–U," P. J. Vail, E. Kolemen, M. D. Boyer, and A. S. Welander, None, July 2020,

  • "Real-time Pedestal Optimization and ELM Control with 3D Fields and Gas Flows on DIII-D," F. M. Laggner et al., Nuclear Fusion, May 2020,

  • "Adaptive Real-Time Pedestal Control for DIII-D and Prospects for ITER," E. Kolemen et al., IAEA Fusion Energy Conference, March 2020,

  • "An Ideal MHD δW Stability Analysis That Bypasses the Newcomb Equation," A. S. Glasser, E. Kolemen, and A. H. Glasser, Physics of Plasmas, February 2020,

  • "Offline Contextual Bayesian Optimization for Nuclear Fusion," Y. Chung, I. Char, W. Neiswanger, K. Kandasamy, A. O. Nelson, M. D. Boyer, E. Kolemen, and J. Schneider, NeurIPS, January 2020,

2019

Special Topics

Papers

  • "ECE-Based q-Profile Measurement and Concept for Equilibrium Reconstruction," A. O. Nelson, M. E. Austin, and E. Kolemen, Review of Scientific Instruments, September 2019,

  • "Development of Real-Time Software for Thomson Scattering Analysis at NSTX-U," R. Rozenblat, E. Kolemen, F. M. Laggner, C. Freeman, G. Tchilinguirian, P. Sichta, and G. Zimmer, None, August 2019,

  • "NSTX/NSTX-U Theory, Modeling and Analysis Results," S. M. Kaye et al., Nuclear Fusion, June 2019,

  • "Electron Cyclotron Emission Based q-Profile Measurement and Concept for Equilibrium Reconstruction," A. O. Nelson, M. E. Austin, and E. Kolemen, Plasma Physics and Controlled Fusion, June 2019,

  • "High Fusion Performance in Super H-Mode Experiments on Alcator C-Mod and DIII-D," P. B. Snyder et al., None, June 2019,

  • "Progress in Disruption Prevention for ITER," E. J. Strait et al., None, June 2019,

  • "Inter-ELM Pedestal Localized Fluctuations in Tokamaks: Summary of Multi-Machine Observations," F. M. Laggner, A. Diallo, M. Cavedon, and E. Kolemen, Nuclear Materials and Energy, April 2019,

  • "Simultaneous Detection of Neoclassical Tearing Mode and Electron Cyclotron Current Drive Locations Using Electron Cyclotron Emission in DIII-D," A. O. Nelson, R. J. La Haye, M. E. Austin, A. S. Welander, and E. Kolemen, Fusion Engineering and Design, February 2019,

  • "Time-Resolved Electron Temperature and Species Measurements and Predictions of Plasma-Assisted Reforming of Methane," T. Y. Chen, S. Yang, A. C. Rousso, B. M. Goldberg, S. Wu, E. Kolemen, and Y. Ju, AIAA SciTech Forum, January 2019,

  • "Advances in Radiated Power Control at DIII-D," D. Eldon et al., Nuclear Materials and Energy, January 2019,

  • "Identification of Multiple Eigenmode Growth Rates in DIII-D and EAST Tokamak Plasmas," Z. R. Wang et al., None, January 2019,

Liquid Metals

Papers

  • "Liquid Metal Diagnostics," M. G. Hvasta, G. Bruhaug, A. E. Fisher, D. Dudt, and E. Kolemen, Fusion Science and Technology, August 2019,

  • "Critical Exploration of Liquid Metal Plasma-Facing Components in a Fusion Nuclear Science Facility," C. E. Kessel et al., Fusion Science and Technology, April 2019,

  • "Design of the Flowing Liquid Torus (FLIT)," E. Kolemen et al., Nuclear Materials and Energy, April 2019,

  • "Study of Liquid Metal Surface Wave Damping in the Presence of Magnetic Fields and Electrical Currents," A. E. Fisher, M. G. Hvasta, and E. Kolemen, Nuclear Materials and Energy, February 2019,

Machine Learning

Papers

  • "Advancing Fusion with Machine Learning Research Needs Workshop," D. Humphreys et al., Office of Science, U.S. Department of Energy, May 2019,

  • "Offline Contextual Bayesian Optimization," I. Char, Y. Chung, W. Neiswanger, K. Kandasamy, A. O. Nelson, M. D. Boyer, E. Kolemen, and J. Schneider, NeurIPS, January 2019,

Controls and Optimization

Papers

  • "A Scalable Real-Time Framework for Thomson Scattering Analysis: Application to NSTX-U," F. M. Laggner, A. Diallo, B. P. LeBlanc, R. Rozenblat, G. Tchilinguirian, and E. Kolemen, Review of Scientific Instruments, April 2019,

  • "Optimization of the Snowflake Divertor for Power and Particle Exhaust on NSTX–U," P. J. Vail, O. Izacard, and E. Kolemen, None, March 2019,

  • "Design and Simulation of the Snowflake Divertor Control for NSTX–U," P. J. Vail, M. D. Boyer, A. S. Welander, and E. Kolemen, None, January 2019,

2018

Special Topics

Papers

  • "Fast and Pervasive Heat Transport Induced by Multiple Locked Modes in DIII-D," Q. Hu, X. Du, Q. Yu, N. C. Logan, E. Kolemen, R. Nazikian, and Z. H. Jiang, Nuclear Fusion, November 2018,

  • "Pedestal Fueling Variation in a Closed Divertor Configuration at DIII-D," A. O. Nelson, E. Kolemen, F. M. Laggner, O. Izacard, R. Groebner, D. Eldon, M. W. Shafer, A. Leonard, D. Shiraki, and A. C. Sontag, 60th Annual Meeting of the APS Division of Plasma Physics, November 2018,

  • "The Universality of Inter-ELM Pedestal Fluctuations in AUG and DIII-D," F. M. Laggner et al., 27th IAEA Fusion Energy Conference, October 2018,

  • "Progress in Disruption Prevention for ITER," E. J. Strait et al., None, October 2018,

  • "Active Real-Time Control of Alfvén Eigenmodes by Neutral Beam and Electron Cyclotron Heating in the DIII-D Tokamak," W. Hu et al., Nuclear Fusion, September 2018,

  • "The Universality of Inter-ELM Pedestal Fluctuations in AUG and DIII-D Impacting the Edge Profile Structure by Clamping of the Gradients," F. M. Laggner et al., IAEA-CN-258, May 2018,

  • "Developing Physics Basis for the Snowflake Divertor in the DIII-D Tokamak," V. A. Soukhanovskii et al., None, February 2018,

  • "Plasma Boundary Shape Control and Real-Time Equilibrium Reconstruction on NSTX-U," M. D. Boyer et al., Nuclear Fusion, January 2018,

  • "Nonlinear Modeling of the Effect of Multiple Locked Modes on Heat Transport," Q. M. Hu, X. D. Du, Q. Yu, N. C. Logan, E. Kolemen, and R. Nazikian, 45th EPS Conference on Plasma Physics, January 2018,

Controls and Optimization

Papers

  • "A Robust Solution for the Resistive MHDToroidal ∆ Matrix in Near Real-Time," A. S. Glasser, and E. Kolemen, Physics of Plasmas, August 2018,

  • "A Riccati Solution for the Ideal MHD Plasma Response With Applications to Real-Time Stability Control," A. S. Glasser, E. Kolemen, and A. H. Glasser, Physics of Plasmas, July 2018,

  • "Initial Development of the DIII–D Snowflake Divertor Control," E. Kolemen et al., Nuclear Fusion, April 2018,

Liquid Metals

Papers

  • "Experimental Demonstration of Hydraulic Jump Control in Liquid Metal Channel Flow Using Lorentz Force," A. E. Fisher, E. Kolemen, and M. G. Hvasta, Physics of Fluids, June 2018,

  • "Calibrationless Rotating Lorentz-Force Flowmeters for Low Flow Rate Applications," M. G. Hvasta, D. Dudt, A. E. Fisher, and E. Kolemen, Measurement Science and Technology, May 2018,

  • "Thermal Mixing Enhancement of Liquid Metal MHD Free-Surface Flow by Optimizing Vortex Generator Arrays," K. Kusumi, T. Kunugi, T. Yokomine, Z. Kawara, S. Nakamura, E. Kolemen, and H. Ji, Fusion Engineering and Design, February 2018,

2017

Liquid Metals

Papers

  • "Demonstrating Electromagnetic Control of Free-Surface, Liquid-Metal Flows Relevant to Fusion Reactors," M. G. Hvasta, E. Kolemen, A. E. Fisher, and H. Ji, Nuclear Fusion, November 2017,

  • "FLIT: Flowing Liquid Metal Torus," E. Kolemen et al., IAEA Divertor Workshop, November 2017,

  • "Electromagnetic Control of Heat Transport within a Rectangular Channel Filled with Flowing Liquid Metal," M. Modestov, E. Kolemen, A. E. Fisher, and M. G. Hvasta, Nuclear Fusion, November 2017,

  • "Experimental Calibration Procedures for Rotating Lorentz-Force Flowmeters," M. G. Hvasta, N. T. Slighton, E. Kolemen, and A. E. Fisher, Measurement Science and Technology, July 2017,

  • "Fast Liquid Metal Program for Fusion Reactor Divertor," E. Kolemen, White Paper, June 2017,

  • "Study on Thermal Mixing of MHD Liquid Metal Free-Surface Film Flow," K. Kusumi, T. Kunugi, T. Yokomine, Z. Kawara, E. Kolemen, H. Ji, and E. P. Gilson, Fusion Science and Technology, June 2017,

  • "Application of IR Imaging for Free-Surface Velocity Measurement in Liquid-Metal Systems," M. G. Hvasta, E. Kolemen, and A. Fisher, Review of Scientific Instruments, January 2017,

Special Topics

Papers

  • "Advances in the Steady-State Hybrid Regime in DIII-D—A Fully Non-Inductive, ELM-Suppressed Scenario for ITER," C. C. Petty et al., None, August 2017,

  • "Overview of NSTX Upgrade Initial Results and Modelling Highlights," J. E. Menard et al., Nuclear Fusion, June 2017,

  • "Controlling Marginally Detached Divertor Plasmas," D. Eldon et al., Nuclear Fusion, May 2017,

  • "Real-Time Stability Analysis to Achieve Transient Free Operations with Feedback Control," E. Kolemen, Fusion Energy Sciences Advisory Committee (FESAC) Report, May 2017,

  • "Modeling of Lithium Granule Injection in NSTX Using M3D-C1," A. Fil, E. Kolemen, A. Bortolon, N. Ferraro, S. Jardin, P. B. Parks, R. Lunsford, and R. Maingi, Nuclear Materials and Energy, April 2017,

Controls and Optimization

Papers

  • "Fast Numerical Solution of the Plasma Response Matrix for Real-time Ideal MHD Control," A. Glasser, E. Kolemen, and A. H. Glasser, Physics of Plasmas, March 2017,

  • "Improvements in the Fast Vertical Control Systems in KSTAR, EAST, NSTX and NSTX-U," D. Mueller, N. W. Eidietis, D. A. Gates, S. Gerhardt, S. H. Hahn, E. Kolemen, J. Menard, S. W. Yoon, and B. J. Xiao, Plasma Overall Performance and Control, March 2017,

  • "Simultaneous Feedback Control of Plasma Rotation and Stored Energy on NSTX-U Using Neoclassical Toroidal Viscosity and Neutral Beam Injection," I. R. Goumiri, C. W. Rowley, S. A. Sabbagh, D. A. Gates, M. D. Boyer, S. P. Gerhardt, E. Kolemen, and J. E. Menard, Physics of Plasmas, February 2017,

2016

Controls and Optimization

Papers

  • "Transient-Free Operations With Physics-Based Real-time Analysis and Control," E. Kolemen et al., APS Division of Plasma Physics Meeting, November 2016,

  • "Development of the NSTX-U Advanced Divertor Control," P. Vail, and E. Kolemen, None, November 2016,

  • "Modeling and Control of Plasma Rotation for NSTX Using Neoclassical Toroidal Viscosity and Neutral Beam Injection," I. R. Goumiri, C. W. Rowley, S. A. Sabbagh, D. A. Gates, S. P. Gerhardt, M. D. Boyer, R. Andre, E. Kolemen, and K. Taira, Nuclear Fusion, February 2016,

Special Topics

Papers

  • "The Role of Drifts and Radiating Species in EX-D Detached Divertor Operation at DIII-D," A. G. McLean et al., 26th IAEA Fusion Energy Conference, October 2016,

  • "Progress in Snowflake Divertor Research in DIII-D, NSTX, and NSTX-U," V. A. Soukhanovskii et al., None, October 2016,

  • "Developing and Validating Advanced Divertor Solutions on DIII-D for Next-Step Fusion Devices," H. Y. Guo et al., Nuclear Fusion, September 2016,

  • "Snowflake Divertor Configuration Effects on Pedestal Stability and Edge Localized Modes in NSTX and DIII-D Tokamaks," V. A. Soukhanovskii et al., None, September 2016,

  • "Nonlinear 3D M3D-C1 Simulations of Tokamak Plasmas Crossing a MHD Linear Stability Boundary," S. Jardin et al., Princeton Plasma Physics Laboratory, January 2016,

Liquid Metals

Papers

  • "Study on Thermal Mixing of Liquid-Metal Free-Surface Flow by Obstacles Installed at the Bottom of a Channel," K. Kusumi, T. Kunugi, T. Yokomine, Z. Kawara, J. A. Hinojosa, E. Kolemen, H. Ji, and E. Gilson, Fusion Engineering and Design, January 2016,

2015

Special Topics

Papers

  • "Evolution of E×B Shear and Coherent Fluctuations Prior to Hl Transitions in DIII-D and Control Strategies for Hl Transitions," D. Eldon et al., Physics of Plasmas, November 2015,

  • "Impact of Central ECCD on Steady-State Hybrid Scenario in DIII-D," C. C. Petty et al., None, November 2015,

  • "Impact of Central ECCD on Steady-State Hybrid Scenario in DIII-D," C. C. Petty, R. Nazikian, M. A. Van Zeeland, D. C. Pace, B. A. Grierson, X. Chen, E. Kolemen, G. R. McKee, R. Prater, and F. Turco, None, October 2015,

  • "Performance History and Upgrades for the DIII-D Gyrotron Complex," J. Lohr et al., EPJ Web of Conferences, July 2015,

  • "High Internal Inductance for Steady-State Operation in Iter and a Reactor," J. R. Ferron, C. T. Holcomb, T. C. Luce, J. M. Park, E. Kolemen, R. J. La Haye, W. M. Solomon, and F. Turco, Nuclear Fusion, June 2015,

  • "Developing Snowflake Divertor Physics Basis in the DIII-D, NSTX and NSTX-U Tokamaks Aimed at the Divertor Power Exhaust Solution," V. A. Soukhanovskii et al., None, June 2015,

  • "Investigation of Peeling-Ballooning Stability Prior to Transient Outbursts Accompanying Transitions out of H-Mode in DIII-D," D. Eldon et al., Physics of Plasmas, May 2015,

  • "Investigation of Peeling-Ballooning Stability Prior to Transient Outbursts Accompanying Transitions Out of H-Mode in DIII-D," D. Eldon et al., Physics of Plasmas, May 2015,

  • "Control of Plasma Stored Energy for Burn Control Using DIII-D In-Vessel Coils," R. J. Hawryluk et al., International Atomic Energy Agency Nuclear Fusion, April 2015,

  • "Taming the Plasma–Material Interface with the ‘Snowflake’ Divertor in NSTX," V. A. Soukhanovskii, D. D. Ryutov, and X. Xu, None, April 2015,

  • "An Overview of Recent Physics Results from NSTX," S. M. Kaye et al., International Atomic Energy Agency Nuclear Fusion, March 2015,

  • "Novel Aspects of Plasma Control in ITER," D. Humphreys et al., Physics of Plasmas, February 2015,

Controls and Optimization

Papers

  • "First-principles-driven Model-based Optimal Control of the Current Profile in NSTX-U," Z. O. Ilhan, W. Wehner, J. Barton, E. Schuster, D. Gates, S. Gerhardt, and J. Menard, 2015 IEEE Conference on Control Applications (CCA), September 2015,

  • "Development of Robust and Multi-Mode Control of Tearing in DIII-D," A. S. Welander, R. J. La Haye, D. A. Humphreys, E. Kolemen, and F. Volpe, None, June 2015,

  • "Modeling and Control of Plasma Rotation for NSTX Using Neoclassical Toroidal Viscosity (NTV) and Neutral Beam Injection (NBI)," I. R. Goumiri, C. W. Rowley, S. A. Sabbagh, D. A. Gates, S. P. Gerhardt, E. Kolemen, and K. Taira, APS DPP, January 2015,

2014

Special Topics

Papers

  • "Heat Flux Management via Advanced Magnetic Divertor Configurations and Divertor Detachment," E. Kolemen et al., Journal of Nuclear Materials, December 2014,

  • "Radiative Snowflake Divertor Studies in DIII-D," V. A. Soukhanovskii et al., None, December 2014,

  • "Application of the Radiating Divertor Approach to Innovative Tokamak Divertor Concepts," T. W. Petrie et al., None, November 2014,

  • "Snowflake Divertor Configuration Studies in DIII-D Tokamak," V. A. Soukhanovskii et al., None, October 2014,

  • "Applying the Radiating Divertor Approach to Innovative Tokamak Divertor Concepts," T. W. Petrie et al., None, September 2014,

  • "Applying the Radiating Divertor Approach to Innovative Tokamak Divertor Concepts," T. W. Petrie et al., None, September 2014,

  • "Developing Physics Basis for the Radiative Snowflake Divertor at DIII-D," V. A. Soukhanovskii et al., None, September 2014,

  • "Performance and Upgrades for the Electron Cyclotron Heating System on DIII-D," M. Cengher, J. Lohr, Y. A. Gorelov, R. Ellis, E. Kolemen, D. Ponce, S. Noraky, and C. P. Moeller, IEEE Transactions on Plasma Science, July 2014,

  • "Array Magnetics Modal Analysis for the DIII-D Tokamak Based on Localized Time-Series Modelling," K. E. J. Olofsson, J. M. Hanson, D. Shiraki, F. A. Volpe, D. A. Humphreys, R. J. La Haye, M. J. Lanctot, E. J. Strait, A. S. Welander, and E. Kolemen, Plasma Physics and Controlled Fusion, July 2014,

Controls and Optimization

Papers

  • "Burning Plasma Relevant Control Development: Advanced Magnetic Divertor Configurations, Divertor Detachment and Burn Control," E. Kolemen et al., Fusion Energy Sciences Advisory Committee (FESAC) Report, September 2014,

  • "State-of-the-Art Neoclassical Tearing Mode Control in DIII-D Using Real-Time Steerable Electron Cyclotron Current Drive Launchers," E. Kolemen et al., Nuclear Fusion, May 2014,

  • "Designing, Constructing, and Using Plasma Control System Algorithms on DIII-D," A. Hyatt et al., IEEE Transactions on Plasma Science, March 2014,

  • "Progress and Improvement of KSTAR Plasma Control Using Model-Based Control Simulators," S. H. Hahn et al., Fusion Engineering and Design, January 2014,

2013

Controls and Optimization

Papers

  • "Physics-based Control-oriented Modeling of the Current Profile Evolution in NSTX-Upgrade," Z. Ilhan, J. Barton, W. Shi, E. Schuster, D. Gates, S. Gerhardt, E. Kolemen, and J. Menard, 55th Annual Meeting of the APS Division of Plasma Physics, November 2013,

  • "Advanced Control of Neoclassical Tearing Modes in DIII-D with Real-Time Steering of the Electron Cyclotron Current Drive," A. S. Welander et al., None, November 2013,

  • "Latest Advancements in DIII-D Plasma Control Software and Hardware," B. G. Penaflor, J. R. Ferron, A. W. Hyatt, M. L. Walker, R. D. Johnson, D. A. Piglowski, E. Kolemen, A. S. Welander, and M. J. Lanctot, None, April 2013,

  • "Real-time Mirror Steering for Improved Closed Loop Neoclassical Tearing Mode Suppression by Electron Cyclotron Current Drive in DIII-D," E. Kolemen et al., Fusion Engineering and Design, March 2013,

Special Topics

Papers

  • "An Overview of KSTAR Results," J.-G. Kwak et al., Nuclear Fusion, September 2013,

  • "Overview of Physics Results from the Conclusive Operation of the National Spherical Torus Experiment," S. A. Sabbagh et al., None, September 2013,

  • "Snowflake Divertor Studies in DIII-D and NSTX Aimed at the Power Exhaust Solution for the Tokamak," V. A. Soukhanovskii et al., None, July 2013,

  • "Upgrades and Performance of the Electron Cyclotron Heating System on DIII-D," M. Cengher, J. Lohr, Y. A. Gorelov, R. Ellis, E. Kolemen, D. Ponce, R. Prater, S. Noraky, and C. P. Moeller, IEEE Transactions on Plasma Science, June 2013,

  • "Enhancements for the DIII-D ECH System," J. Lohr, M. Cengher, Y. A. Gorelov, E. Kolemen, C. P. Moeller, S. Noraky, D. Ponce, R. Prater, and R. A. Ellis, IEEE Transactions on Plasma Science, June 2013,

  • "Advanced Divertor Configurations with Large Flux Expansion," V. A. Soukhanovskii et al., None, January 2013,

2012

Special Topics

Papers

  • "Divertor Heat Flux Mitigation with Impurity-Seeded Standard and Snowflake Divertors in NSTX," V. A. Soukhanovskii et al., None, October 2012,

  • "Snowflake Divertor Configuration Studies in National Spherical Torus Experiment," V. A. Soukhanovskii et al., None, August 2012,

  • "Overview of the Physics and Engineering Design of NSTX Upgrade," J. E. Menard et al., Nuclear Fusion, July 2012,

  • "Performance, Diagnostics, Controls and Plans for the Gyrotron System on the DIII-D Tokamak," J. Lohr et al., EPJ Web of Conferences, April 2012,

  • "Optimization of an Occulter-based Extrasolar-planet-imaging Mission," E. Kolemen, and N. J. Kasdin, Journal of Guidance, Control, and Dynamics, February 2012,

2011

Controls and Optimization

Papers

  • "Plasma Modelling Results and Shape Control Improvements for NSTX," E. Kolemen et al., Nuclear Fusion, November 2011,

  • "Multivariable Model-Based Shape Control for the National Spherical Torus Experiment (NSTX)," W. Shi, M. Alsarheed, E. Schuster, M. L. Walker, J. Leuer, D. A. Humphreys, and D. A. Gates, None, April 2011,

Special Topics

Papers

  • "System Modeling, Validation, and Design of Shape Controllers for NSTX," M. L. Walker, D. A. Humphreys, N. W. Eidietis, J. A. Leuer, A. S. Welander, and E. Kolemen, None, November 2011,

  • "Multiple Poincaré Sections Method for Finding the Quasiperiodic Orbits of the Restricted Three-Body Problem," E. Kolemen, N. J. Kasdin, and P. Gurfil, Celestial Mechanics and Dynamical Astronomy, September 2011,

  • "Plasma-Material Interface Development for Future Spherical Tokamak-Based Devices in NSTX," V. A. Soukhanovskii et al., None, September 2011,

  • "Overview of Physics Results from NSTX," R. Raman et al., None, August 2011,

  • "Quasi-Periodic Orbits of the Restricted Three-Body Problem Made Easy," E. Kolemen, N. J. Kasdin, and P. Gurfil, Proceedings of the 62nd International Astronautical Congress, July 2011,

  • "Recent Progress Towards an Advanced Spherical Torus Operating Point in NSTX," S. P. Gerhardt et al., Nuclear Fusion, June 2011,

2010

Controls and Optimization

Papers

  • "Implementation of βN Control in the National Spherical Torus Experiment," S. P. Gerhardt et al., Fusion Science and Technology, December 2010,

  • "Plasma Modeling Results, Control Improvement for NSTX," E. Kolemen, D. A. Gates, S. Gerhardt, R. Kaita, J. Kallman, N. J. Kasdin, H. Kugel, D. Mueller, C. Rowley, and V. Soukhanovskii, 23rd IAEA Fusion Energy Conference, September 2010,

  • "Strike Point Control for the National Spherical Torus Experiment (NSTX)," E. Kolemen et al., Nuclear Fusion, September 2010,

Special Topics

Papers

  • "Progress in the Development of Advanced Spherical Torus Operating Scenarios in NSTX," S. P. Gerhardt et al., 23rd IAEA Fusion Energy Conference, October 2010,

  • "Synergy Between Lithium Plasma-Facing Component Coatings and the Snowflake Divertor Configuration in NSTX," V. A. Soukhanovskii et al., None, October 2010,

  • "Synergy Between Lithium Plasma-Facing Component Coatings and the Snowflake Divertor Configuration in NSTX," V. A. Soukhanovskii et al., None, September 2010,

  • "“Snowflake” Divertor Configuration in NSTX," V. A. Soukhanovskii et al., None, August 2010,

2009

Special Topics

Papers

  • "Overview of Results From the National Spherical Torus Experiment (NSTX)," D. A. Gates, and et al., Nuclear Fusion, September 2009,

  • "Experimental Vertical Stability Studies for ITER Performance and Design Guidance," D. A. Humphreys et al., Nuclear Fusion, September 2009,

2007

Special Topics

Papers

  • "Optimal Trajectory Control of an Occulter-Based Planet-Finding Telescope," E. Kolemen, and N. J. Kasdin, Proceedings of the New Trends in Astrodynamics and Applications, February 2007,

  • "Linear Stability of Ring Systems," R. J. Vanderbei, and E. Kolemen, None, February 2007,

2005

Special Topics

Papers

  • "Hamilton-Jacobi Modelling of Relative Motion for Formation Flying," E. Kolemen, N. J. Kasdin, and P. Gurfil, New Trends in Astrodynamics and Applications, August 2005,

  • "Hamilton–Jacobi Modelling of Stellar Dynamics," P. Gurfil, N. J. Kasdin, and E. Kolemen, Advances in Space Research, June 2005,

  • "Bounded, Periodic Relative Motion Using Canonical Epicyclic Orbital Elements," N. J. Kasdin, and E. Kolemen, AAS/AIAA Astrodynamics Conference, March 2005,

2004

Special Topics

Papers

  • "Canonical Modelling of Relative Spacecraft Motion via Epicyclic Orbital Elements," N. J. Kasdin, P. Gurfil, and E. Kolemen, Celestial Mechanics and Dynamical Astronomy, November 2004,

  • "Relative Spacecraft Motion: A Hamiltonian Approach to Eccentricity Perturbations," E. Kolemen, and N. J. Kasdin, AAS 04-294, January 2004,