LNF:(2022-2026) Estudio de transporte y turbulencia en plasmas con métodos de gran resolución espacial

LNF - Nationally funded project

Title: Estudio de transporte y turbulencia en plasmas con métodos de gran resolución espacial

Reference: PID2021-124883NB-I00

Programme and date: Proyectos de investigación no orientada (2021)

Programme type (Modalidad de proyecto): Proyectos de Generación de Conocimiento

Area/subarea (Área temática / subárea): Energía y transporte / Energía

Principal Investigator(s): José Luis de Pablos Hernández y Boudewijn van Milligen

Project type: Proyecto individual

Start-end dates: 01/09/2022 - 31/08/2026

Financing granted (direct costs): 150.000 €

Acknowledgement: Grant PID2021-124883NB-I00 funded by MICIU/AEI/10.13039/501100011033 and by “ERDF/EU”.

Description of the project

The general goal of the present proposal is to investigate the interaction of turbulence, plasmas flows and the magnetic topology and determine the impact of the resulting complex interactions on plasma transport. This topic could be important for ITER and DEMO. To reach this goal, we need to reach the following objectives:

1. Development of novel low noise electronics in vacuum and test it to obtain a better SNR than the actual one with the help of Ciemat electronics team. This upgrade is essential to be able to measure phase relations between fluctuating fields and understand their mutual interaction.
2. Study the impact of the magnetic configuration on turbulent properties. We expect to find that the location of major rational surfaces plays a significant role in radial transport.
3. Study the impact of confinement transitions on turbulence, and flows on plasma turbulence.

Main results

El proyecto ha permitido avanzar significativamente en la comprensión de los mecanismos que regulan la turbulencia y la transición al régimen de alto confinamiento (L-H) en el stellarator TJ-II, un aspecto clave para el desarrollo de la energía de fusión. Aprovechando la flexibilidad del dispositivo para modificar con precisión la configuración magnética, se han realizado experimentos pioneros que han puesto de manifiesto la influencia de las superficies racionales y de la corriente neta del plasma sobre las propiedades turbulentas y el confinamiento.

Entre los principales resultados destaca la identificación de la intermitencia como un nuevo parámetro para caracterizar la turbulencia, demostrando su sensibilidad tanto a la configuración magnética como a los flujos de plasma. Asimismo, mediante experimentos con variaciones dinámicas de la configuración magnética se ha establecido una relación directa entre la evolución temporal de la turbulencia y la presencia de superficies racionales de bajo orden.

El proyecto también ha demostrado que la transición L-H y la mejora del confinamiento dependen de forma sistemática de la corriente neta del plasma y, por tanto, de la configuración magnética. El análisis combinado de experimentos y simulaciones de turbulencia MHD resistiva ha permitido proponer mecanismos físicos que explican esta dependencia, relacionados con la distribución de superficies racionales y la generación de flujos zonales capaces de suprimir la turbulencia.

Estos resultados contribuyen a mejorar la comprensión de los procesos fundamentales que determinan el confinamiento del plasma y proporcionan nuevos criterios para optimizar el funcionamiento de futuros dispositivos de fusión, reforzando el liderazgo científico en el ámbito del confinamiento magnético.

Dissemination of project results (peer-reviewed publications and conference presentations)

1. C. Hidalgo, E. Ascasíbar, D. Alegre, A. Alonso, J. Alonso, R. Antón, A. Baciero, J. Baldzuhn, J. Barcala, L. Barrera, E. Blanco, J. Botija, L. Bueno, S. Cabrera, A. de Castro, E. de la Cal, I. Calvo, A. Cappa, D. Carralero, R. Carrasco, B. Carreras, R. Castro, A. de Castro, L. Cebrián, A. Chmyga, M. Chamorro, P. Colino, F. de Aragón, M. Drabinskiy, J. Duque, L. Eliseev, F. Escoto, T. Estrada, M. Ezzat, F. Fraguas, D. Fernández-Ruiz, J. Fontdecaba, A. Gabriel, D. Gadariya, L. García, I. García-Cortés, R. García- Gómez, J. García-Regaña, A. González-Jerez, G. Grenfell, J. Guasp, V. Guisse, J. Hernández-Sánchez, J. Hernanz, A. Jiménez-Denche, P. Khabanov, N. Kharchev, R. Kleiber, F. Koechl, T. Kobayashi, G. Kocsis, M. Koepke, A. Kozachek, L. Krupnik, F. Lapayese, M. Liniers, B. Liu, D. López-Bruna, B. López- Miranda, U. Losada, E. de la Luna, S. Lysenko, F. Martín-Díaz, G. Martín-Gómez, E. Maragkoudakis, J. Martínez-Fernández, K. McCarthy, F. Medina, M. Medrano, A. Melnikov, P. Méndez, F. Miguel, B. van Milligen, A. Molinero, G. Motojima, S. Mulas, Y. Narushima, M. Navarro, I. Nedzelskiy, R. Nuñez, M. Ochando, S. Ohshima, E. Oyarzábal, J. de Pablos, F. Palomares, N. Panadero, F. Papousek, F. Parra, C. Pastor, I. Pastor, A. de la Peña, R. Peralta, A. Pereira, P. Pons-Villalonga, H. Polaino, A. Portas, E. Poveda, F. Ramos, G. Rattá, M. Redondo, C. Reynoso, E. Rincón, C. Rodríguez-Fernández, L. Rodríguez-Rodrigo, A. Ros, E. Sánchez, J. Sánchez, E. Sánchez-Sarabia, S. Satake, J. Sebastián, R. Sharma, N. Smith, C. Silva, E. Solano, A. Soleto, M. Spolaore, T. Szepesi, F. Tabarés, D. Tafalla, H. Takahashi, N. Tamura, H. Thienpondt, A. Tolkachev, R. Unamuno, J. Varela, J. Vega, J. Velasco, I. Voldiner, S. Yamamoto, and the TJ-II Team. Overview of the TJ-II stellarator research programme towards model validation in fusion plasmas. Nuclear Fusion, 62(4):042025, 2022.
2. B. P. van Milligen, B. A. Carreras, L. García, G. Grenfell, I. Voldiner, and C. Hidalgo. The impact of radial electric fields and plasma rotation on intermittence in TJ-II. Plasma Phys. Control. Fusion, 64(5):055006, 2022.
3. Melnikov, V, A., Eliseev, L. G., Barcala, J. M., Cappa, A., Chmyga, A. A., Drabinskiy, M. A., Hidalgo, C., Khabanov, P. O., Kharchev, N. K., Kozachek, A. S., Liniers, M., Lopez-Bruna, D., Losada, U., Lysenko, S. E., Medina, F., Molinero, A., Ochando, M., De Pablos, J. L., Pastor, I and TJ-II Team, 2D distributions of potential and density mean-values and oscillations in the ECRH and NBI plasmas at the TJ-II stellarator, Plasma Phys. Control. Fusion 64:054009, 2022.
4. B. van Milligen, I. Voldiner, B. Carreras, L. García, M. Ochando, and the TJ-II Team. Rational surfaces, flows and radial structure in the TJ-II stellarator. Nucl. Fusion, 63:016027, 2023.
5. I. García-Cortés, K. J. McCarthy, T. Estrada, V. Tribaldos, D. Medina-Roque, B. van Milligen, E. Ascasíbar, R. Carrasco, A. A. Chmyga, R. García, J. Hernández-Sánchez, C. Hidalgo, A. S. Kozachek, F. Medina, M. A. Ochando, J. L. de Pablos, N. Panadero, and I. Pastor. Enhanced confinement induced by pellet injection in the stellarator TJ-II. Phys. Plasmas, 30(7):072506, 2023.
6. L. García, I. García-Cortés, B. Carreras, K. McCarthy, and B. van Milligen. The effect of pellet injection on turbulent transport in TJ-II. Phys. Plasmas, 30:092303, 2023.
7. Krupnik, L. I. and Barcala, J. M. and Cappa, A. and Chmyga, O. O. and Dreval, M. B. and Hidalgo, C. and Khrebtov, S. M. and Komarov, O. D. and Kozachok, O. S. and Martinez, J. and Molinero, A. and de Pablos, J. L. and TJ-II Team, Plasma profiles, self -organization and Alfven eigenmodes studies using the HIBP diagnostic in the TJ-II stellarator, Problems of atomic science and technology, 1:122-125, 2023.
8. K.J. McCarthy, I. García-Cortés, J.A. Alonso, A. Arias-Camisón, E. Ascasíbar, A. Baciero, A. Cappa, R. Carrasco, O.O. Chmyga, T. Estrada, R. García, J. Hernández-Sánchez, F.J. Hernanz, O.S. Kozachok, B. López Miranda, F. Medina, D. Medina-Roque, B. van Milligen, M. Navarro, M.A. Ochando, J.L. de Pablos, N. Panadero, I. Pastor, J. de la Riva, M. C. Rodríguez, D. Tafalla, V. Tribaldos, and TJ-II Team. Multi-pellet injection into the NBI-heated phase of TJ-II plasmas. Nuclear Fusion, 64(6):066019, 2024.
9. B.Ph. van Milligen, T. Estrada, B.A. Carreras, L. García, and the TJ-II Team. Importance of the rotational transform for L–H transitions in the TJ-II stellarator. Plasma, 7(2):446–464, 2024.
10. J.A. Alonso, D. Alegre, J. Alonso, R. Antón, A. Arias-Camisón, E. Ascasíbar, A. Baciero, J.M. Barcala, M. Barnes, E. Blanco, L. Bueno, A. Bustos, S. Cabrera, E. de la Cal, I. Calvo, A. Cappa, D. Carralero, R. Carrasco, B. Carreras, R. Castro, A. de Castro, L. Cebrián, M. Chamorro, A.A. Chmyga, P. Colino, J. Duque, F.J. Escoto, T. Estrada, A. Fernández, J. Fraguas, J.M. Fontdecaba, A. Gabriel, L. García, I. García-Cortés, R. García-Gómez, J.M. García-Regaña, G. Godino-Sedano, J. Gómez-Manchón, A. González, A. González-Jerez, V. Guisse, J. Hernández-Sánchez, J. Hernanz, C. Hidalgo, P. Ivanova, A. Jiménez-Denche, D. Jiménez-Rey, G. Kocsis, M. Koepke, A.S. Kozachek, F. Lapayese, M. Liniers, D. López, D. López-Bruna, B. López-Miranda, E. de la Luna, E. Maragkoudakis, F. Martín-Díaz, G. Martín-Gómez, J. Martínez-Fernández, K.J. McCarthy, F. Medina, D. Medina-Roque, M. Medrano, P. Méndez, F.J. Miguel, B. van Milligen, A. Molinero, G. Motojima, S. Mulas, M. Navarro, I. Nedzelskiy, R. Nuñez, M. Ochando, E. Oyarzábal, J.L. de Pablos, F. Palomares, N. Panadero, F.I. Parra, C. Pastor, I. Pastor, A. de la Peña, R. Peralta, A. Pereira, P. Pons-Villalonga, A.B. Portas, E. Poveda, F.J. Ramos, G.A. Rattá, M. Redondo, C. Reynoso, E. Rincón, J. de la Riva, C. Rodríguez-Fernández, A. Ros, E. Sánchez, J. Sánchez, E. Sánchez-Sarabia, J.A. Sebastián, E.R. Solano, A. Soleto, T. Szepesi, F.L. Tabarés, D. Tafalla, H. Takahashi, N. Tamura, H. Thienpondt, A. Tolkachev, V. Tribaldos, R. Unamuno, J. Varela, J. Vega, J.L. Velasco, and I. Voldiner. Density profiles in stellarators: an overview of particle transport, fuelling and profile shaping studies at TJ-II. Nuclear Fusion, 64(11):112018, 2024.
11. H. Bsharat, Igor Voldiner, B. Ph. van Milligen, and C. Xiao. Conditional cross-correlation analysis of floating potential fluctuations in the TJ-II stellarator. Radiation Effects and Defects in Solids, 179(11-12):1527, 2024.
12. B.Ph. van Milligen, I. García-Cortés, K.J. McCarthy, B.A. Carreras, L. García, A. Cappa, P. Pons-Villalonga, T. Estrada, D. Medina-Roque, J. Hernández Sánchez, R. García, O.S. Kozachok, O.O. Chmyga, J.L. de Pablos, J.M. Barcala, A. Molinero, I. Pastor, D. Tafalla, A. de la Peña, F. Lapayese, and the TJ-II Team. The rotational transform and enhanced confinement in the TJ-II stellarator. J. Plasma Phys., 91(4):E98, 2025.
13. G. Grenfell, M. Griener, M. Bernert, J. Adamek, D. Brida, M. Faitsch, P. Manz, B.Ph. van Milligen, U. Stroth, the ASDEX Upgrade Team, and the EUROfusion Tokamak Exploitation Team. On the evolution of profiles and fluctuations towards the L-mode density limit in ASDEX Upgrade. Nuclear Fusion, 65(8):086023, 2025.
14. J. Ortiz, J. Varela, L. Herrera Quesada, P. Pons-Villalonga, A. Cappa, U. Losada, F. Papousek, B. Ph. van Milligen, L. Garcia, D. A. Spong, Y. Ghai, M. A. Ochando, and C. Hidalgo. Analysis of the HAE activity in the TJ-II stellarator using a Landau closure model. Phys. Plasmas, 32:072506, 2025.
15. Paulo Aguayo, Gonzalo Farias, Alejandro González-Ganzábal, Ernesto Fabregas, Teresa Estrada, Boudewijn van Milligen, Alfonso Baciero, Belén López-Miranda, Francisco Medina, and Giuseppe A. Rattá Gutiérrez. A data-driven approach to estimate plasma density in TJ-II stellarator. Fusion Engineering and Design, 224:115596, 2026.
16. A. González Ganzábal, G.A. Rattá, T. Estrada, J. Martínez-Fernández, N. Panadero, A. Cappa,B. López-Miranda, A. Baciero, F. Martín, D. Tafalla, B.P. Van Milligen, F. Medina, A. de la Peña, and S. Dormido-Canto. A comprehensive database of TJ-II signals and diagnostics for statistically based models. Fusion Engineering and Design, 224:115613, 2026.
17. I Voldiner, E de la Cal, B van Milligen, and TJ-II Team. Spectroscopic gas puff imaging diagnostic for the measurement of two-dimensional electron density and temperature distributions. Plasma Physics and Controlled Fusion, 68(4):045017, 2026.
18. Arnold Alonso Alvarez, Boudewijn Ph Van Milligen, Igor Voldiner, Ibere Luiz Caldas, Zwinglio Guimarães Filho, Oleksandr Kozachok, and Alexander Chmyga. Edge turbulence dynamics across electron–ion root transitions during ECRH modulation experiments in the TJ-II stellarator. Plasma Physics and Controlled Fusion, 68(6):065019, 2026.
19. Andres Cureño-Ramirez, Luis Gerardo de la Fraga, Giuseppe A. Rattá, Alejandro González-Ganzábal, Alfonso Baciero, Belén López-Miranda, Boudewijn van Milligen, Alfonso Pardo, and Jesús Calle-Cancho. Data-driven estimation of experimental signals in TJ-II: A proof of principle. Fusion Engineering and Design, 230:115847, 2026.
20. B.Ph. van Milligen, I. Voldiner, E. de la Cal, A. Alonso Alvarez, I. Luiz Caldas and Z. Guimarães Filho, Turbulence analysis with the spectroscopic gas puff imaging diagnostic in the TJ-II stellarator, Plasma Phys. Control. Fusion (2026)

Conferences

1. Oral: K. J. McCarthy, I. García-Cortés, V. Tribaldos, D. Medina-Roque, N. Panadero, E. Ascasíbar, A. A. Chmyga, T. Estrada, J. Hernández-Sánchez, A. S. Kozachek, M. Liniers, P. Medina, M. A. Ochando, J. L. de Pablos, I. Pastor, C. Toledo, B. van Milligen, and TJ-II Team. Enhanced confinement after multi-pellet injection into neutral beam injection heated plasmas in the stellarator TJ-II. In Proc. 48th EPS Conference on Plasma Physics, volume 46A of ECA, page O2.103. European Physical Society, 2022.
2. Poster: I. Voldiner, E. de la Cal, B. van Milligen, C. Hidalgo, and TJ-II Team. Novel high speed spectrally resolved imaging system for simultaneous 2-D Te and ne edge plasma measurements with temporal resolution up to 100 kHz. In Proc. 48th EPS Conference on Plasma Physics, volume 46A of ECA, page P2b.106. European Physical Society, 2022.
3. Poster: D. Medina-Roque, I. García-Cortés, K. J. McCarthy, N. Tamura, N. Panadero, E.Ascasíbar, T. Estrada, J. Hernández-Sánchez, A. S. Kozachek, M. Liniers, P. Medina, M. Ochando, J. L. de Pablos, I. Pastor, C. Toledo, B. van Milligen, and TJ-II Team. New insights into cryogenic and TESPEL pellet physics in TJ-II. In Proc. 48th EPS Conference on Plasma Physics, volume 46A of ECA, page P2b.113. European Physical Society, 2022.
4. Oral: I. Voldiner, E. de la Cal, B. van Milligen and TJ-II Team, Two-dimensional ne and Te measurements of the edge plasma turbulence in TJ-II. In Proc. 49th EPS Conference on Plasma Physics, European Physical Society, In Proc. 49th EPS Conference on Plasma Physics, volume 47A of ECA, page O2.102, 2023.
5. Poster: I. García-Cortés, K. J. McCarthy, V. Tribaldos, D. Medina-Roque, N. Panadero, E. Ascasíbar, T.Estrada, J. Hernández-Sánchez, A. S. Kozachek, R. Carrasco, B. López-Miranda, P. Medina, M.A. Ochando, J. L. de Pablos, I. Pastor, B. van Milligen & TJ-II team. Enhanced confinement induced by multi-pellet injection into neutral beam injection heated plasmas in the stellarator TJ-II. In Proc. 49th EPS Conference on Plasma Physics, European Physical Society, In Proc. 49th EPS Conference on Plasma Physics, volume 47A of ECA, page P4.008, 2023
6. Poster: L. García, I. García-Cortés, B. Carreras, K. McCarthy, and B. van Milligen. Consequences of pellet injection on the turbulent transport in TJ-II. In Proc. 49th EPS Conference on Plasma Physics, volume 47A of ECA, page P4.079. European Physical Society, 2023.
7. Oral: J. A. Alonso and D. Alegre and J. Alonso and R. Antón and A. Arias-Camisón and E. Ascasíbar and A. Baciero and J.M. Barcala and M. Barnes and E. Blanco and L. Bueno and A. Bustos and S. Cabrera and A. de Castro and E. de la Cal and I. Calvo and A. Cappa and D. Carralero and R. Carrasco and B. Carreras and R. Castro and A. de Castro and L. Cebrián and A.A. Chmyga and M. Chamorro and P. Colino and J. Duque and F.J. Escoto and T. Estrada and A. Fernández and J. Fraguas and J.M. Fontdecaba and A. Gabriel and L. García and I. García-Cortés and R. García-Gómez and J.M. García-Regaña and G. Godino-Sedano and J. Gómez-Manchón and A. González-Jerez and V. Guisse and J. Hernández-Sánchez and J. Hernanz and C. Hidalgo and P. Ivanova and A. Jiménez-Denche and D. Jiménez-Rey and G. Kocsis and M. Koepke and A.S. Kozachek and F. Lapayese and M. Liniers and D. López and D. López-Bruna and B. López-Miranda and E. de la Luna and E. Maragkoudakis and F. Martín-Díaz and G. Martín-Gómez and J. Martínez-Fernández and K.J. McCarthy and F. Medina and D. Medina-Roque and M. Medrano and P. Méndez and F.J. Miguel and B. van Milligen and A. Molinero and G. Motojima and S. Mulas and M. Navarro and I. Nedzelskiy and R. Nuñez and M. Ochando and E. Oyarzábal and J.L. de Pablos and F. Palomares and N. Panadero and F.I. Parra and C. Pastor and I. Pastor and A. de la Peña and R. Peralta and A. Pereira and P. Pons-Villalonga and A.B. Portas and E. Poveda and F.J. Ramos and G.A. Rattá and M. Redondo and C. Reynoso and E. Rincón and J. de la Riva and C. Rodríguez-Fernández and A. Ros and E. Sánchez and J. Sánchez and E. Sánchez-Sarabia and J.A. Sebastián and E.R. Solano and A. Soleto and T. Szepesi and F.L. Tabarés and D. Tafalla and H. Takahashi and N. Tamura and H. Thienpondt and A. Tolkachev and V. Tribaldos and R. Unamuno and J. Varela and J. Vega and J.L. Velasco and I. Voldiner. Density profiles in stellarators: an overview of particle transport, fueling and profile shaping studies at TJ-II. 29th IAEA Fusion Energy Conference, IAEA-CN-316/2223, 2023
8. Poster: K. J. McCarthy, I. García-Cortés, T. Estrada, D. Medina-Roque, B. Van Milligen, N. Pandero, E. Ascasíbar, R. Carrasco, R. García, J. Hernández-Sánchez, B. López Miranda, TJ-II Team, V. Tribaldos, A. A. Chmyga, S. Kozachek. Enhanced plasma performance after pellet injection in the stellarator TJ-II. 29th IAEA Fusion Energy Conference, IAEA-CN-316/1875, 2023
9. Poster: J.L de Pablos, B. van Milligen, J.M. Barcala, A. Molinero, I. García-Cortés, O. Chmyga, O.S. Kozachok, G. Martín, R. García, R. Sánchez, J.M. Reynolds-Barredo, C. Hidalgo, and the TJ-II Team. Turbulence control through feedback of zonal flows. In 50th EPS Conference on Plasma Physics, volume 48A of ECA, page P2.070. EPS, European Physical Society, 2024.
10. Poster: L. García, B.A. Carreras, B.Ph. van Milligen, I. García-Cortés, K.J. McCarthy, and the TJ-II Team. Impact of low order rationals in the enhanced confinement by pellet injection in TJ-II. In 50th EPS Conference on Plasma Physics, volume 48A of ECA, page P4.074. EPS, European Physical Society, 2024.
11. Poster: I. García-Cortés, K.J. McCarthy, B. van Milligen, T. Estrada, D. Medina-Roque, A. Baciero, B.A. Carreras, A. Cappa, A.A. Chmyga, F. Medina, L. Garcia, R. García, J. Hernández-Sánchez, F.J. Hernanz, A.S. Kozachek, F. Lapayese, B. Lopez-Miranda, D. Lopez-Bruna, J.L. De Pablos, N. Panadero, I. Pastor, A. de la Peña, P. Pons-Villalonga, M.C. Rodriguez, D. Tafalla, V. Tribaldos, and TJ-II Team. Exploring enhanced plasma performance after pellet injections via rotational transform modulation in the TJ-II stellarator. In Proc. 29th IAEA Fusion Energy Conference, volume IAEA-CN-316/2795, pages P1–2803. IAEA, 2025.
12. Poster: K. J. McCarthy, I. García-Cortés, B. van Milligen, A. Baciero, R. Carrasco, T. Estrada, R. García, J. Hernández Sánchez, B. López Miranda, F. Medina, D. Medina-Roque, M. Navarro, N. Panadero, I. Pastor, M. C. Rodríguez, and TJ-II Team. Interpreting structures observed in pellet ablation profiles in the stellarator TJ-II. In Proc. 29th IAEA Fusion Energy Conference, pages IAEA–CN–316/2795. IAEA, 2025.
13. Poster: V. Tribaldos, I. García-Cortés, K.J. Mccarthy, J.M. Reynolds-Barredo, D. Medina-Roque, A. Baciero, O.O. Chmyga, T. Estrada, O.S. Kozachok, D. López-Bruna, F. Medina, B. van Milligen, J.L. de Pablos, N. Panadero, I. Pastor, J. de la Riva, and TJ-II Team. Confinement modelling of enhanced plasma performance after multiple pellet injections in the TJ-II stellarator. In Proc. 29th IAEA Fusion Energy Conference, pages IAEA–CN–316–2804. IAEA, 2025.
14. Poster: A. González Ganzábal, G.A. Rattá, T. Estrada, J. Martínez-Fernández, N. Panadero, A. Cappa, B. López-Miranda, A. Baciero, F. Martín, D. Tafalla, B.P. Van Milligen, F. Medina, A. de la Peña, S. Dormido-Canto, and the TJ-II team. Development of a standardised TJ-II database for machine learning models and applications. In International Stellarator and Heliotron Workshop, 2026.
15. Poster: B.Ph. van Milligen, I. García-Cortés, K.J. McCarthy, B.A. Carreras, L. García, O.S. Kozachok, O.O. Chmyga, J.L. de Pablos, and the TJ-II Team. Impact of the rotational transform and pellets on enhanced confinement and turbulence in the TJ-II stellarator. In 52nd EPS Conference on Plasma Physics, ECA, P2.1095. EPS, European Physical Society, 2026.
16. Poster: B.Ph. van Milligen, I. Voldiner, E. de la Cal, Arnold A. Alvarez, I.L. Caldas, Z.O. Guimarães-Filho, and the TJ-II Team. Turbulence analysis with the spectral gas puff imaging diagnostic in the TJ-II stellarator. In 52nd EPS Conference on Plasma Physics, ECA, P2.1117. EPS, European Physical Society, 2026.
17. Poster: Arnold A. Alvarez, Boudewijn Ph. van Milligen, Igor Voldiner, Iberê L. Caldas, Zwinglio O. Guimarães-Filho, O.S. Kozachok, O.O. Chmyga, and the TJ-II Team. Turbulence and transport across electron-ion root transitions during ECRH modulation in the TJ-II stellarator. In 52nd EPS Conference on Plasma Physics, ECA, P2.1001. EPS, European Physical Society, 2026.
18. Poster: V. Tribaldos, I. García-Cortés, K.J. Mc-Carthy, J.M. Reynolds-Barredo, B. Van Milligen, A. Baciero, J. De La Riva, J.L. De Pablos, O.S. Kozachek, I. Pastor, and the TJ-II Team. Validation of neoclassical Er predictions in multi-pellet induced enhanced confinement regimes in TJ-II. In 52nd EPS Conference on Plasma Physics, ECA, P3.1167. EPS, European Physical Society, 2026.

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