Characterization of turbulent transport of particles and optimization of plasma heating and operation current control in the coils of the SCR-1 Stellarator
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The SCR-1 stellarator, operational since June 2016, has emerged as a pioneer in Latin America in the field of modular stellarator devices, developed by the Costa Rica Institute of Technology. This device has been the subject of continuous characterization and optimization efforts, with a focus on significant improvements in turbulence, coil feeding and wave propagation within the SCR-1 stellarator. This work presents a first study of turbulence, examining behavior at the plasma edge and its interaction with external electric fields, as well as the importance of electrode polarization. In addition, the design of the DC-DC Buck converter for the SCR-1 current coil control system is addressed, along with the proposal of a Vlasov antenna to optimize energy deposition in the plasma. Results indicate the significant influence of electrodes on plasma behavior. A power converter was designed to ensure an efficient and safe electrical supply and simulated by PLECS. The buck converter was deemed crucial for precise and stable current regulation in the coils. Electronic components were sized to handle the required current and voltage specifications. Finally, a modified Vlasov antenna was designed, which demonstrated in COMSOL multiphysics simulations that the new configuration improved the distribution of electromagnetic waves in the SCR-1 vacuum vessel.
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[1] F. Coto-Vílchez et al., “Progress on the small modular stellarator SCR-1: new diagnostics and heating scenarios”, Journal Of Plasma Physics, vol. 86, n.o 4, Jul. 2020, doi: 10.1017/s0022377820000677.
[2] O. E. Garcia, R. Kube, A. Theodorsen, and H. L. Pécseli, “Stochastic modelling ofintermittent fluctuations in the scrape-off layer: Correlations, distributions, level crossings, and moment estimation”, Physics Of Plasmas, vol. 23, n.o 5, May 2016, doi: 10.1063/1.4951016.
[3] N. Bisai and A. Sen, “Theory of plasma blob formation and its numerical andexperimental validations”, Reviews Of Modern Plasma Physics, vol. 7, n.o 1, Jun. 2023, doi: 10.1007/s41614-023-00124-5.
[4] G. Grenfell et al., “Measurement and control of turbulence spreading in the scrape-off layer of TJ-II stellarator,” Nuclear Fusion, vol. 59, no. 1, p. 016018, Nov. 2018, doi: 10.1088/1741-4326/aaf034.
[5] M. Ramisch, F. Greiner, N. Mahdizadeh, K. Rahbarnia, and U. Stroth, Observation oflarge-scale coherent structures under strongE×Bshear in the torsatron TJ-K, Plasma Physics and Controlled Fusion, vol. 49, no. 6, pp. 777–789, Apr. 2007, doi: 10.1088/0741-3335/49/6/006.
[6] J. Bergman, “Surface-mountable dual-polarized antenna arrays for 100 GHz,”, Masterthesis, Dept. of Electronics and Nanotechnology, Aalto University, Finland, Mar. 21, 2022. https://urn.fi/URN:NBN:fi:aalto-202203272551
[7] R. Solano-Piedra, “Simulación de escenarios de calentamiento por microondas paraconocer las condiciones de la propagación de ondas de Bernstein electrónicas en el plasma del stellarator SCR-1”. Master’s thesis, Universidad de Costa Rica, Sistema de Estudios de Posgrado, Ciudad Universitaria Rodrigo Facio, Costa Rica.
[8] F. Fanale et al., “Progress on the conceptual design of the antennas for the DTT ECRHsystem,” Fusion Engineering and Design, vol. 192, p. 113797, May 2023, doi: 10.1016/j.fusengdes.2023.113797.
[9] A. Köhn et al., “Schemes of microwave heating of overdense plasmas in the stellaratorTJ-K,” Plasma Physics and Controlled Fusion, vol. 55, no. 1, p. 014010, Dec. 2012, doi: 10.1088/0741-3335/55/1/014010.
[10] H. Zhou and X. Yang, “Design of Novel VLASOV-type Antennas for High Power Microwaves (HPM),” 2007 IEEE 34th International Conference on Plasma Science (ICOPS), p. 912, Jun. 2007, doi: 10.1109/ppps.2007.4346218.
[11] H. M. E. Misilmani, M. Al-Husseini, and K. Y. Kabalan, “Improved Vlasov Antenna with Curved Cuts and Optimized Reflector Position and Shape,” International Journal of Antennas and Propagation, vol. 2015, pp. 1–12, Jan. 2015, doi: 10.1155/2015/193630.
[12] D. Jiménez, L. Campos-Duarte, R. Solano-Piedra, L. A. Araya-Solano, E. Meneses, and I. Vargas, BS-SOLCTRA: Towards a parallel magnetic plasma confinement simulation framework for modular stellarator devices, in Proc. High Performance Computing: 6th Latin American Conf. (CARLA 2019), Turrialba, Costa Rica, Sept. 25–27, 2019, Revised Selected Papers, vol. 6, pp. 33–48, 2020.
[13] J. Boedo et al., “Enhanced particle confinement and turbulence reduction due to E B shear in the TEXTOR tokamak,” Nuclear Fusion, vol. 40, no. 7, pp. 1397–1410, Jul. 2000, doi: 10.1088/0029-5515/40/7/309.
[14] J. Mora, I. Vargas, and J. Asenjo, Diseño de un regulador de corriente eléctrica para las bobinas modulares del Stellarator SCR-1, Revista Tecnología En Marcha, vol. 30, no. 5, p. 21, Dec. 2017, doi: 10.18845/tm.v30i5.3220.
[15] N. Mohan, T. M. Undeland, and W. P. Robbins, Power Electronics: Converters, Applications, and Design. 2003.
[16] H. Trimino, “Design of an ech system for a small modular stellarator,” 2011 Abstracts IEEE International Conference on Plasma Science, p. 1, Jun. 2011, doi: 10.1109/plasma.2011.5993156.