Dr. Ivan Vargas´s publications and participation in conferences during his stay at the National Fusion Laboratory, CIEMAT, Spain.

Peer-Reviewed Articles

  • Electron Internal Transport Barriers, Rationals and Quasi Coherent Oscillations in the Stellarator TJ-II
    T. Estrada, A. Alonso, A. A. Chmyga, N. Dreval, L. Eliseev, C. Hidalgo, A. D. Komarov, A. S. Kozachok, L. Krupnik, A. V. Melnikov, I. S. Nedzelskiy, J. L. de Pablos, L. A. Pereira, Yu. Tashev, V. Tereshin and V.I. Vargas.
    Plasma Phys. Control. Fusion 47 (2005) L57-L63.

  • Overview of TJ-II Experiments.
    C. Hidalgo,[…], V.I. Vargas, et al.
    Nucl. Fusion 45 (2005) S266-S275.

  • The Quest for a Divertor Effect in TJ-II.
    I. García-Cortés, F.L. Tabarés, D. Tafalla, R. Balbín, J.M. Carmona, A. Hidalgo, J.A. Ferreira, A. López-Fraguas, K.J. McCarthy, V.I. Vargas, TJ-II Team.
    Fusion Science and Technology 50 (2006) 307-312.

  • Experimental Electron Heat Diffusion in ECH Plasmas of the TJ-II Stellarator. V.I. Vargas, D. López-Bruna, J. Herranz, F. Castejón and the TJ-II Team.
    Nucl. Fusion 47 (2007) 1367-1375.

  • Overview of TJ-II Experiments. J. Sánchez,[…], V.I. Vargas, et al..
    Nucl. Fusion 47 (2007) S677-S685.

  • Effect of Rotational Transform and Magnetic Shear on Confinement of Stellarators.
    E. Ascasíbar, D. López-Bruna, F.Castejón, V.I. Vargas, V. Tribaldos, H. Maassberg, C.D. Beidler, R. Brakel, A. Dinklage, J. Geiger, J.H. Harris, A. Kus, T. Mizuuchi, S. Murakami, S. Okamura, R. Preuss, F. Sano, U. Stroth, Y. Suzuki, J.Talmadge, K.Y. Watanabe, H. Yamada, M. Yokoyama.
    Plasma and Fusion Research 3 (2008) S1004.

  • Quantifying Profile Stiffness.
    B.Ph. Van Milligen, R. Sánchez, V. Tribaldos and V.I. Vargas.
    Plasma and Fusion Research 3 (2008) S1070.

  • Tracking Magnetic Resonances in the Effective Electron Heat Diffusivity of ECH Plasmas of the TJ-II Heliac.
    D. López-Bruna, T. Estrada, F. Medina, E. de la luna, E. Ascasíbar, F. Castejón and V.I. Vargas
    Europhysics News 82 (2008) 65002.

  • Confinement transitions in TJ-II under Li-coated wall conditions.
    J. Sánchez, […], V.I. Vargas, et al.
    Nucl. Fusion 49 No 10 (October 2009) 104018

Conference Participations

  • Local Transport in Density and Rotational Transform Scans in TJ-II ECRH Discharges.
    V.I. Vargas, D.López-Bruna, T. Estrada, et al
    32nd EPS Conference on Plasma Phys. Tarragona, 27 June - 1 July, European Physical Society, ECA Vol.29C, P-5.032 (2005).

  • The quest for a divertor effect in TJ-II.
    I. García–Cortés, F.L. Tabarés, D. Tafalla, R. Balbín, J.M. Carmona, A. Hidalgo, J.A.Ferreira, A. López-Fraguas, K. McCarthy, V.I. Vargas and the TJ-II team
    15th Stellarator Workshop, Madrid, 3-7 October, P3-09 (2005).

  • Impact of gas puffing location on density control and plasma parameters in TJ-II.
    F.L.Tabarés, I. García-Cortés, D. Tafalla, J.A. Ferreira, A.Hidalgo, V. Tribaldos, R. Balbín, J.M.Carmona, I. Pastor, KJ. McCarthy, T. Estrada, E. Ascasíbar and V.I. Vargas
    15th Stellarator Workshop, Madrid, 3-7 October, P3-10 (2005).

  • First Measurements of High-Energy Charge-Exchange Neutrals Using Compact Neutral Particle Analyser in TJ-II Stellarator.
    R. Balbín, S. Petrov, J.M. Fontdecaba, K. J. McCarthy, V.I. Vargas, J.M. Carmona, J. Guasp. D. Makarin.
    32nd EPS Conference on Plasma Phys. Tarragona, 27 June - 1 July, European Physical Society, ECA Vol.29C, D-5.001 (2005).

  • Injection of Hydrogen and Ethylene at the Plasma Edge of TJ-II: A Comparative Study.
    F.L. Tabarés, I. García-Cortés, D. Tafalla, E. de , J.A. Ferreira, A. Hidalgo, J.M. Carmona, K.J. McCarthy and V.I. Vargas.
    32nd EPS Conference on Plasma Phys. Tarragona, 27 June - 1 July, European Physical Society, ECA Vol.29C, P-4.008 (2005).

  • Electron Internal Transport Barriers, Rationals and Fluctuations in the Stellarator TJ-II.
    L. Krupnik, A. Alonso, A. Chmyga,, N. Dreval, L. Eliseev, T. Estrada, C. Hidalgo, A. Komarov, A. Kozachok, A. Melnikov, I. Nedzelskiy, J.L. de Pablos, L.A. Pereira, V. Tereshin, V.I. Vargas.
    32nd EPS Conference on Plasma Phys. Tarragona, 27 June - 1 July, European Physical Society, ECA Vol.29C, P-5.028 (2005).

  • A Study of Central Impurity Ion Temperatures During ECR and NBI Heating Phases in TJ-II Stellarator Plasmas.
    J.M Carmona, K. J. McCarthy, J.M Fontdecaba, S. Petrov, R. Balbín, V.I. Vargas, B. Zurro.
    15th Stellarator Workshop, , 3-7 October, P3-07 (2005).

  • Local Transport in Density and Rotational Transform Scans in TJ-II ECRH Discharges.
    V.I. Vargas, D.López-Bruna, T. Estrada, et al.
    15th Stellarator Workshop, , 3-7 October, P3-20 (2005).

  • Overview of TJ-II Experiments.
    D. López-Bruna and the TJ-II Team.
    XI Latin American Workshop on Plasma D.F, 5-9 December 2005, AIP Conference Proceedings, Subseries: Plasma Physics, Vol. 875, 357-362 (2005).

  • Dependencies of Electron Heat Diffusion in TJ-II ECRH Plasmas.
    V.I. Vargas, D.López-Bruna, J. Herranz, F. Castejón.
    33rd EPS Conference on Plasma Phys. Rome, 19 - 23 June, European Physical Society, ECA Vol.30I, P-1.134 (2006).

  • Experimental Intertwinement of Radial Electric Fields, Fluctuations and Transport with Density in TJ-II Team.
    D. LópezBruna, A.Alonso, E.Blanco, I.Calvo, T.Estrada, J.Herranz, C.Hidalgo, L.Krupnik, A. Melnikov, B. van Milligen, M.A.Pedrosa, V.I. Vargas and the TJ-II Team.
    11-th International Conference and School on Plasma Physics and Controlled Fusion and 2-nd Alushta International Workshop on the Role of Electric Fields in Plasma Confinement in Stellarators and Tokamaks, Alushta (Crimea), Ukraine, September 11-16}, (2006).

  • Electron Diffusivity Profiles in ECH Plasmas of the TJ-II Heliac.
    V.I. Vargas, D.López-Bruna, J.M. Reynolds, T. Estrada, J. Guasp.
    34th EPS Conference on Plasma Physics, , 2-6 July, European Physical Society, P-1.120 (2007).

  • Modification of Transport due to Low Order Rationals of the Rotational Transform in ECH Plasmas of the TJ-II Heliac.
    D. López-Bruna, T. Estrada, F. Medina, J. Herranz, V.I. Vargas, A. Baciero, E. Ascasíbar, J. A. Romero, F. Castejón.
    16th International Stellarator/Heliotron Workshop, October 15-19, Ceratopia Toki, , P-1.016 (2007).

  • Effect of rotational transform and magnetic shear on confinement of stellarators
    E. Ascasíbar, D. López-Bruna, F. Castejón, V.I. Vargas, V. Tribaldos, H. Maassberg, C.D. Beidler, R. Brakel, A. Dinklage, J. Geiger, J.H. Harris, A. Kus, T. Mizuuchi, S. Murakami, S. Okamura, R. Preuss, F. Sano, U. Stroth, Y. Suzuki, J. Talmadge, K.Y. Watanabe, H. Yamada, M. Yokoyama.
    16th International Stellarator/Heliotron Workshop, October 15-19, Ceratopia Toki, Toki, Japan, I-01 (2007).

  • Particle Transport in ECH Plasmas of the TJ-II Stellarator.
    D.Lopez-Bruna, J.M.Reynolds, V.I. Vargas, J. Guasp, F.Castejón.
    12th European Fusion Theory Conference, 24-27 September,(2007).

  • ECH Power Dependence of Electron Heat Diffusion in ECH Plasmas of the TJ-II Stellarator.
    V.I. Vargas, D.López-Bruna, J. García, A. Fernández, A. Cappa, J. Herranz, F. Castejón.
    35th EPS Conference on Plasma Physics, 9-13 June, European Physical Society, P5.018 (2008).

  • Effect of magnetic resonances in the effective electron heat transport of TJ-II ECH plasmas.
    D. López-Bruna, T. Estrada, F. Medina, E. de la Luna, E. Ascasíbar, F. Castejón, V. I. Vargas 35th EPS Conference on Plasma Physics,9-13 June, European Physical Society, Crete, Greece, P2.030 (2008).

  • Radial Electric Field Computations in TJ-II and Comparison with HIBP Measurements.
    J.J. Martinell, D.López-Bruna, F. Castejón, V.I. Vargas and C. Gutiérrez-Tapia 35th EPS Conference on Plasma Physics, , June 29-July 3, European Physical Society, (2009).

  • Local effects of magnetic resonances in ECRH plasmas of the TJ-II Heliac.
    D.López-Bruna, J. A. Romero,[…], V.I. Vargas, et al.
    17th International Stellarator / Heliotron Workshop, Princeton, New Jersey USA, 12-16 October, (2009).

Internal Reports

  • Difusión térmica electrónica experimental en plasmas ECRH del TJ-II.
    V.I. Vargas, D. López-Bruna, J. Herranz, F. Castejón.
    Informe Técnico Asociación EURATOM-CIEMAT, CIEMAT nº 1070 (2006).

  • Transporte de partículas en plasmas ECRH del TJ-II.
    V.I. Vargas, D. López-Bruna, T. Estrada, J. M. Reynolds, J. Guasp, J.L. Velasco, J. Herranz.
    Informe Técnico Asociación EURATOM-CIEMAT, CIEMAT, nº 1129 (2007).

  • Density dependence of particle transport in ECH plasmas of the TJ-II stellarator.
    V.I. Vargas, D. López-Bruna, J. Guasp, J. Herranz, T. Estrada, F. Medina, M.A. Ochando, F. Castejón, J.L. Velasco, J.M. Reynolds, A. Salas and the TJ-II Team.
    Informe Técnico Asociación EURATOM-CIEMAT, CIEMAT, nº 1162 (2009).