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Prabhat Kumar

Contact Information MS 50A-3111 Lawrence Berkeley National Lab 1 Cyclotron Rd. Berkeley, CA 94720 [email protected]

I am a postdoctoral researcher in Center for Computational Sciences and Engineering (CCSE) in the Computing Sciences Area at the Lawrence Berkeley National Laboratory.

My research interests include mathematical modeling of physics processes, numerical algorithms for complex PDE systems, and high performance computing. During my PhD research, I worked on development and implementation of numerical algorithms in the parallel, relativistic, 3D electromagnetic Particle-in-Cell code called SPACE. We used SPACE code for modeling and simulation of laser-plasma interactions and wakefield acceleration experiments at the Accelerator Test Facility of Brookhaven National Laboratory. During my one-year postdoc at Stanford University, I worked on modeling laser-particle coupled beam propgation for space propulsion systems and kinetic modeling of low temperature magnetized plasmas to study microturbulence in various plasma discharges and anomalous transport in Hall thrusters.

I am currently working with the Microelectronics and WarpX teams.

• P. Kumar, M. Hoffmann, A. Nonaka, S. Salahuddin, and Z. Yao 3D ferroelectric phase field simulations of polycrystalline multi-phase hafnia and zirconia based ultra-thin films, Advanced Electronic Materials, 2400085, 2024. [link]

• R. Zgadzaj, J. Welch, Y. Cao, L. D. Amorim, A. Cheng, A. Gaikwad, P. Iapozzutto, P. Kumar, V. N. Litvinenko, I. Petrushina, R. Samulyak, N. Vafaei-Najafabadi, C. Joshi, C. Zhang, M. Babzien, M. Fedurin, R. Kupfer, K. Kusche, M. A. Palmer, I. V. Pogorelsky, M. N. Polyanskiy, C. Swinson, and M. C. Downer, Plasma electron acceleration driven by a long-wave-infrared laser, Nature Communications 15, 4037 (2024). [link].

• P. Kumar, A. Nonaka, R. Jambunathan, G. Pahwa, S. Salahuddin, and Z. Yao FerroX: A GPU-accelerated, 3D Phase-Field Simulation Framework for Modeling Ferroelectric Devices, Computer Physics Communications, 108757, 2023. [link]

• Z. Chang, L. Fang, V. Fedorov, S. Ghimire, C. Heide, N. Ishii, J. Itatani, C. Joshi, Y. Kobayashi, P. Kumar, A. Marra , S. Mirov, I. Petrushina, M. Polyanskiy, D. A. Reis, S. Tochitsky, S. Vasilyev, L. Wang, Y. Wu, and F. Zhou, Intense infrared lasers for strong-field science, Advances in Optics and Photonics 2022 [link]
• S. T. Sewell, P. Kumar, and K. Hara, Effects of the wavelength of the plasma waves on cross-field electron transport in partially magnetized plasmas, in IEEE Transactions on Plasma Science, vol. 50, no. 10, pp. 3498-3506 2022 [link]
• K. Yu, P. Kumar, S. Yuan, A. Cheng, and R. Samulyak, SPACE: 3D parallel solvers for Vlasov-Maxwell and Vlasov-Poisson equations for relativistic plasmas with atomic transformations, Computer Physics Communications 277 (2022) 108396 2022 [link]
• A. Castillo, P. Kumar, C. Limbach, and K. Hara, Mutually Guided Light and Particle Beam Propagation, Scientific Reports volume 12, Article number: 4810 2022 [link]
• P. Kumar, D. Kuldinow, A. Castillo, A. Gerakis, and K. Hara, Nonlinear dynamics of a coupled light and particle beam propagation, Physical Review A, 103(4), p.043502 2021 [link]
• P. Kumar, S. Tsikata, and K. Hara, Effects of multiply charged ions on microturbulence-driven electron transport in partially magnetized plasmas, Journal of Applied Physics 130, 173307 2021 [link]
• P. Kumar, K. Yu, R. Zgadzaj, M. C. Downer, I. Petrushina, R. Samulyak, V. Litvinenko, and N. Vafaei-Najafabadi, Evolution of the self-injection process in long wavelength infrared laser driven LWFA, Phys. Plasma 28(1), p.013102 2021 [link]
• P. Kumar, K. Yu, R. Zgadzaj, L. D. Amorim, M. C. Downer, V. N. Litvinenko, N. Vafaei-Najafabadi, and R. Samulyak, Simulation study of CO2 laser-plasma interactions and self-modulated wakefield acceleration, Phys. Plasmas 26(8), p.083106 2019 [link]
• P. Kumar, K. Yu, and R. Samulyak, Influence of Ionization and Beam Quality on Interaction of TW-Peak CO2 Laser With Hydrogen Plasma, J. Phys.: Conf. Ser. 1067 042008 2018 [link]

• A. M. Castillo, P. Kumar and K. Hara, Computational modeling of a coupled light-particle beam propagation, AIAA SciTech Forum, AIAA 2022-2261, San Diego, CA, January 2022 [link]
• P. Kumar, S. T. Sewell and K. Hara, Cross-field electron transport due to coupling of drift-driven microinstabilities in the presence of singly, doubly, and triply charged ion streams, AIAA SciTech Forum, AIAA 2022-2192, San Diego, CA, January 2022 [link]
• A. M. Castillo, P. Kumar and K. Hara, Laser and Particle Coupled Beam Propagation for Deep Space Propulsion, AIAA 2021-3249, AIAA Propulsion and Energy Forum, August 2021 [link]
• P. Kumar, K. Yu, L. Amorim, M. Downer, P. Iapozzuto, V. Litvinenko, N. Vafaei-Najafabadi, J. Welch, J. Yan, R. Zgadzaj, R. Samulyak Self-modulated laser wakefield acceleration driven by CO2 laser in hydrogen plasma, 46th EPS Conference on Plasma Physics P2.2009 2019 [link]
• J. Yan, P. Iapozzuto, M. Flament, C. Joshi, Y. Jing, P. Kumar, R. Samulvak, I. Pogorelsky, C. Swinson, M. Babzien, K. Kusche, M. Polyanskiy, M. Fedurin, M. Palmer, W. B. Mori, R. Zgadzaj, J. Welch, M. C. Downer, W. Lu, V. Litvinenko, N. Vafaei-Najafabadi, L.D. Amorim Investigating instabilities of long, intense laser pulses in plasma wakefield accelerators , 2018 IEEE Advanced Accelerator Concepts Workshop (AAC) pp. 1-5 2018 [link]