Overview of TJ-II experiments

J. Sánchez; M. Acedo; A. Alonso; J. Alonso; P. Alvarez; F. De Aragón; E. Ascasíbar; A. Baciero; R. Balbín; L. Barrera; E. Blanco; J. Botija; B. Brãas; E. De La Cal; E. Calderón; I. Calvo; A. Cappa; J. A. Carmona; B. A. Carreras; R. Carrasco; F. Castejón; G. Catalán; A. A. Chmyga; N. B. Dreval; M. Chamorro; S. Eguilior; J. Encabo; L. Eliseev; T. Estrada; A. Fernández; R. Fernández; J. A. Ferreira; J. M. Fontdecaba; C. Fuentes; J. De La Gama; A. García; L. García; I. García-Cortés; J. M. García-Regãa; B. Gonçalves; J. Guasp; J. Herranz; A. Hidalgo; C. Hidalgo; R. Jiménez-Gómez; J. A. Jiménez; D. Jiménez; I. Kirpitchev; A. D. Komarov; A. S. Kozachok; L. Krupnik; F. Lapayese; M. Liniers; D. López-Bruna; A. López-Fraguas; J. López-Rázola; A. López-Sánchez; E. De La Luna; G. Marcon; F. Martín; L. Martínez-Fresno; K. J. McCarthy; F. Medina; M. Medrano; A. V. Melnikov; P. Méndez; E. Mirones; B. Van Milligen; I. S. Nedzelskiy; M. Ochando; J. Olivares; R. Orozco; P. Ortiz; J. L. De Pablos; L. Pacios; I. Pastor; M. A. Pedrosa; A. De La Pẽa; A. Pereira; D. Pérez-Risco; A. Petrov; S. Petrov; A. Portas; D. Rapisarda; L. Ríos; C. Rodríguez; L. Rodríguez-Rodrigo; E. Rodríguez-Solano; J. Romero; A. Ros; A. Salas; E. Sánchez; M. Sánchez; E. Sánchez-Sarabia; X. Sarasola; K. Sarksian; C. Silva; S. Schchepetov; N. Skvortsova; A. Soleto; F. Tabarés; D. Tafalla; J. Tera; A. Tolkachev; V. Tribaldos; V. I. Vargas; J. Vega; G. Velasco; M. Weber; G. Wolfers; S. J. Zweben; B. Zurro

doi:10.1088/0029-5515/45/10/S22

Overview of TJ-II experiments

J. Sánchez
, M. Acedo
, A. Alonso
, J. Alonso
, P. Alvarez
, F. De Aragón
, E. Ascasíbar
, A. Baciero
, R. Balbín
, L. Barrera
, E. Blanco
, J. Botija
, B. Brãas
, E. De La Cal
, E. Calderón
, I. Calvo
, A. Cappa
, J. A. Carmona
, B. A. Carreras
, R. Carrasco

F. Castejón, G. Catalán, A. A. Chmyga, N. B. Dreval, M. Chamorro, S. Eguilior, J. Encabo, L. Eliseev, T. Estrada, A. Fernández, R. Fernández, J. A. Ferreira, J. M. Fontdecaba, C. Fuentes, J. De La Gama, A. García, L. García, I. García-Cortés, J. M. García-Regãa, B. Gonçalves, J. Guasp, J. Herranz, A. Hidalgo, C. Hidalgo, R. Jiménez-Gómez, J. A. Jiménez, D. Jiménez, I. Kirpitchev, A. D. Komarov, A. S. Kozachok, L. Krupnik, F. Lapayese, M. Liniers, D. López-Bruna, A. López-Fraguas, J. López-Rázola, A. López-Sánchez, E. De La Luna, G. Marcon, F. Martín, L. Martínez-Fresno, K. J. McCarthy, F. Medina, M. Medrano, A. V. Melnikov, P. Méndez, E. Mirones, B. Van Milligen, I. S. Nedzelskiy, M. Ochando, J. Olivares, R. Orozco, P. Ortiz, J. L. De Pablos, L. Pacios, I. Pastor, M. A. Pedrosa, A. De La Pẽa, A. Pereira, D. Pérez-Risco, A. Petrov, S. Petrov, A. Portas, D. Rapisarda, L. Ríos, C. Rodríguez, L. Rodríguez-Rodrigo, E. Rodríguez-Solano, J. Romero, A. Ros, A. Salas, E. Sánchez, M. Sánchez, E. Sánchez-Sarabia, X. Sarasola, K. Sarksian, C. Silva, S. Schchepetov, N. Skvortsova, A. Soleto, F. Tabarés, D. Tafalla, J. Tera, A. Tolkachev, V. Tribaldos, V. I. Vargas, J. Vega, G. Velasco, M. Weber, G. Wolfers, S. J. Zweben, B. Zurro

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

This paper presents an overview of experimental results and progress made in investigating the role of magnetic configuration on stability and transport in the TJ-II stellarator. Global confinement studies have revealed a positive dependence of energy confinement on the rotational transform and plasma density, together with different parametric dependences for metallic and boronized wall conditions. Spontaneous and biasing-induced improved confinement transitions, with some characteristics that resemble those of previously reported H-mode regimes in other stellarator devices, have been observed. Also, magnetic configuration scan experiments have shown an interplay between magnetic structure (rationals, magnetic shear), transport and electric fields. Although the dc radial electric fields are comparable with those expected from neoclassical calculations, additional mechanisms based on neoclassical/turbulent bifurcations and kinetic effects are needed to explain the impact of magnetic topology on flows and radial electric fields. Hydrocarbon fuelling experiments in configurations with a low-order rational value in the rotational transform located in the proximity of the last closed flux surface (n ≤ 4/m ≤ 2) have shown the impurity screening properties related to the expected divertor effect. The first TJ-II experiments in neutral beam injection plasmas are reported.

Original language	English
Article number	S16
Pages (from-to)	S677-S685
Journal	Nuclear Fusion
Volume	47
Issue number	10
DOIs	https://doi.org/10.1088/0029-5515/45/10/S22 https://doi.org/10.1088/0029-5515/47/10/S16
State	Published - 1 Oct 2007
Externally published	Yes

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Sánchez, J., Acedo, M., Alonso, A., Alonso, J., Alvarez, P., De Aragón, F., Ascasíbar, E., Baciero, A., Balbín, R., Barrera, L., Blanco, E., Botija, J., Brãas, B., De La Cal, E., Calderón, E., Calvo, I., Cappa, A., Carmona, J. A., Carreras, B. A., ... Zurro, B. (2007). Overview of TJ-II experiments. Nuclear Fusion, 47(10), S677-S685. Article S16. https://doi.org/10.1088/0029-5515/45/10/S22, https://doi.org/10.1088/0029-5515/47/10/S16

@article{a0757fb46d4644d397c358e0250520e0,

title = "Overview of TJ-II experiments",

abstract = "This paper presents an overview of experimental results and progress made in investigating the role of magnetic configuration on stability and transport in the TJ-II stellarator. Global confinement studies have revealed a positive dependence of energy confinement on the rotational transform and plasma density, together with different parametric dependences for metallic and boronized wall conditions. Spontaneous and biasing-induced improved confinement transitions, with some characteristics that resemble those of previously reported H-mode regimes in other stellarator devices, have been observed. Also, magnetic configuration scan experiments have shown an interplay between magnetic structure (rationals, magnetic shear), transport and electric fields. Although the dc radial electric fields are comparable with those expected from neoclassical calculations, additional mechanisms based on neoclassical/turbulent bifurcations and kinetic effects are needed to explain the impact of magnetic topology on flows and radial electric fields. Hydrocarbon fuelling experiments in configurations with a low-order rational value in the rotational transform located in the proximity of the last closed flux surface (n ≤ 4/m ≤ 2) have shown the impurity screening properties related to the expected divertor effect. The first TJ-II experiments in neutral beam injection plasmas are reported.",

author = "J. S{\'a}nchez and M. Acedo and A. Alonso and J. Alonso and P. Alvarez and \{De Arag{\'o}n\}, F. and E. Ascas{\'i}bar and A. Baciero and R. Balb{\'i}n and L. Barrera and E. Blanco and J. Botija and B. Br{\~a}as and \{De La Cal\}, E. and E. Calder{\'o}n and I. Calvo and A. Cappa and Carmona, \{J. A.\} and Carreras, \{B. A.\} and R. Carrasco and F. Castej{\'o}n and G. Catal{\'a}n and Chmyga, \{A. A.\} and Dreval, \{N. B.\} and M. Chamorro and S. Eguilior and J. Encabo and L. Eliseev and T. Estrada and A. Fern{\'a}ndez and R. Fern{\'a}ndez and Ferreira, \{J. A.\} and Fontdecaba, \{J. M.\} and C. Fuentes and \{De La Gama\}, J. and A. Garc{\'i}a and L. Garc{\'i}a and I. Garc{\'i}a-Cort{\'e}s and Garc{\'i}a-Reg{\~a}a, \{J. M.\} and B. Gon{\c c}alves and J. Guasp and J. Herranz and A. Hidalgo and C. Hidalgo and R. Jim{\'e}nez-G{\'o}mez and Jim{\'e}nez, \{J. A.\} and D. Jim{\'e}nez and I. Kirpitchev and Komarov, \{A. D.\} and Kozachok, \{A. S.\} and L. Krupnik and F. Lapayese and M. Liniers and D. L{\'o}pez-Bruna and A. L{\'o}pez-Fraguas and J. L{\'o}pez-R{\'a}zola and A. L{\'o}pez-S{\'a}nchez and \{De La Luna\}, E. and G. Marcon and F. Mart{\'i}n and L. Mart{\'i}nez-Fresno and McCarthy, \{K. J.\} and F. Medina and M. Medrano and Melnikov, \{A. V.\} and P. M{\'e}ndez and E. Mirones and \{Van Milligen\}, B. and Nedzelskiy, \{I. S.\} and M. Ochando and J. Olivares and R. Orozco and P. Ortiz and \{De Pablos\}, \{J. L.\} and L. Pacios and I. Pastor and Pedrosa, \{M. A.\} and \{De La Pẽa\}, A. and A. Pereira and D. P{\'e}rez-Risco and A. Petrov and S. Petrov and A. Portas and D. Rapisarda and L. R{\'i}os and C. Rodr{\'i}guez and L. Rodr{\'i}guez-Rodrigo and E. Rodr{\'i}guez-Solano and J. Romero and A. Ros and A. Salas and E. S{\'a}nchez and M. S{\'a}nchez and E. S{\'a}nchez-Sarabia and X. Sarasola and K. Sarksian and C. Silva and S. Schchepetov and N. Skvortsova and A. Soleto and F. Tabar{\'e}s and D. Tafalla and J. Tera and A. Tolkachev and V. Tribaldos and Vargas, \{V. I.\} and J. Vega and G. Velasco and M. Weber and G. Wolfers and Zweben, \{S. J.\} and B. Zurro",

year = "2007",

month = oct,

day = "1",

doi = "10.1088/0029-5515/45/10/S22",

language = "Ingl{\'e}s",

volume = "47",

pages = "S677--S685",

journal = "Nuclear Fusion",

issn = "0029-5515",

number = "10",

}

Sánchez, J, Acedo, M, Alonso, A, Alonso, J, Alvarez, P, De Aragón, F, Ascasíbar, E, Baciero, A, Balbín, R, Barrera, L, Blanco, E, Botija, J, Brãas, B, De La Cal, E, Calderón, E, Calvo, I, Cappa, A, Carmona, JA, Carreras, BA, Carrasco, R, Castejón, F, Catalán, G, Chmyga, AA, Dreval, NB, Chamorro, M, Eguilior, S, Encabo, J, Eliseev, L, Estrada, T, Fernández, A, Fernández, R, Ferreira, JA, Fontdecaba, JM, Fuentes, C, De La Gama, J, García, A, García, L, García-Cortés, I, García-Regãa, JM, Gonçalves, B, Guasp, J, Herranz, J, Hidalgo, A, Hidalgo, C, Jiménez-Gómez, R, Jiménez, JA, Jiménez, D, Kirpitchev, I, Komarov, AD, Kozachok, AS, Krupnik, L, Lapayese, F, Liniers, M, López-Bruna, D, López-Fraguas, A, López-Rázola, J, López-Sánchez, A, De La Luna, E, Marcon, G, Martín, F, Martínez-Fresno, L, McCarthy, KJ, Medina, F, Medrano, M, Melnikov, AV, Méndez, P, Mirones, E, Van Milligen, B, Nedzelskiy, IS, Ochando, M, Olivares, J, Orozco, R, Ortiz, P, De Pablos, JL, Pacios, L, Pastor, I, Pedrosa, MA, De La Pẽa, A, Pereira, A, Pérez-Risco, D, Petrov, A, Petrov, S, Portas, A, Rapisarda, D, Ríos, L, Rodríguez, C, Rodríguez-Rodrigo, L, Rodríguez-Solano, E, Romero, J, Ros, A, Salas, A, Sánchez, E, Sánchez, M, Sánchez-Sarabia, E, Sarasola, X, Sarksian, K, Silva, C, Schchepetov, S, Skvortsova, N, Soleto, A, Tabarés, F, Tafalla, D, Tera, J, Tolkachev, A, Tribaldos, V, Vargas, VI, Vega, J, Velasco, G, Weber, M, Wolfers, G, Zweben, SJ & Zurro, B 2007, 'Overview of TJ-II experiments', Nuclear Fusion, vol. 47, no. 10, S16, pp. S677-S685. https://doi.org/10.1088/0029-5515/45/10/S22, https://doi.org/10.1088/0029-5515/47/10/S16

TY - JOUR

T1 - Overview of TJ-II experiments

AU - Sánchez, J.

AU - Acedo, M.

AU - Alonso, A.

AU - Alonso, J.

AU - Alvarez, P.

AU - De Aragón, F.

AU - Ascasíbar, E.

AU - Baciero, A.

AU - Balbín, R.

AU - Barrera, L.

AU - Blanco, E.

AU - Botija, J.

AU - Brãas, B.

AU - De La Cal, E.

AU - Calderón, E.

AU - Calvo, I.

AU - Cappa, A.

AU - Carmona, J. A.

AU - Carreras, B. A.

AU - Carrasco, R.

AU - Castejón, F.

AU - Catalán, G.

AU - Chmyga, A. A.

AU - Dreval, N. B.

AU - Chamorro, M.

AU - Eguilior, S.

AU - Encabo, J.

AU - Eliseev, L.

AU - Estrada, T.

AU - Fernández, A.

AU - Fernández, R.

AU - Ferreira, J. A.

AU - Fontdecaba, J. M.

AU - Fuentes, C.

AU - De La Gama, J.

AU - García, A.

AU - García, L.

AU - García-Cortés, I.

AU - García-Regãa, J. M.

AU - Gonçalves, B.

AU - Guasp, J.

AU - Herranz, J.

AU - Hidalgo, A.

AU - Hidalgo, C.

AU - Jiménez-Gómez, R.

AU - Jiménez, J. A.

AU - Jiménez, D.

AU - Kirpitchev, I.

AU - Komarov, A. D.

AU - Kozachok, A. S.

AU - Krupnik, L.

AU - Lapayese, F.

AU - Liniers, M.

AU - López-Bruna, D.

AU - López-Fraguas, A.

AU - López-Rázola, J.

AU - López-Sánchez, A.

AU - De La Luna, E.

AU - Marcon, G.

AU - Martín, F.

AU - Martínez-Fresno, L.

AU - McCarthy, K. J.

AU - Medina, F.

AU - Medrano, M.

AU - Melnikov, A. V.

AU - Méndez, P.

AU - Mirones, E.

AU - Van Milligen, B.

AU - Nedzelskiy, I. S.

AU - Ochando, M.

AU - Olivares, J.

AU - Orozco, R.

AU - Ortiz, P.

AU - De Pablos, J. L.

AU - Pacios, L.

AU - Pastor, I.

AU - Pedrosa, M. A.

AU - De La Pẽa, A.

AU - Pereira, A.

AU - Pérez-Risco, D.

AU - Petrov, A.

AU - Petrov, S.

AU - Portas, A.

AU - Rapisarda, D.

AU - Ríos, L.

AU - Rodríguez, C.

AU - Rodríguez-Rodrigo, L.

AU - Rodríguez-Solano, E.

AU - Romero, J.

AU - Ros, A.

AU - Salas, A.

AU - Sánchez, E.

AU - Sánchez, M.

AU - Sánchez-Sarabia, E.

AU - Sarasola, X.

AU - Sarksian, K.

AU - Silva, C.

AU - Schchepetov, S.

AU - Skvortsova, N.

AU - Soleto, A.

AU - Tabarés, F.

AU - Tafalla, D.

AU - Tera, J.

AU - Tolkachev, A.

AU - Tribaldos, V.

AU - Vargas, V. I.

AU - Vega, J.

AU - Velasco, G.

AU - Weber, M.

AU - Wolfers, G.

AU - Zweben, S. J.

AU - Zurro, B.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - This paper presents an overview of experimental results and progress made in investigating the role of magnetic configuration on stability and transport in the TJ-II stellarator. Global confinement studies have revealed a positive dependence of energy confinement on the rotational transform and plasma density, together with different parametric dependences for metallic and boronized wall conditions. Spontaneous and biasing-induced improved confinement transitions, with some characteristics that resemble those of previously reported H-mode regimes in other stellarator devices, have been observed. Also, magnetic configuration scan experiments have shown an interplay between magnetic structure (rationals, magnetic shear), transport and electric fields. Although the dc radial electric fields are comparable with those expected from neoclassical calculations, additional mechanisms based on neoclassical/turbulent bifurcations and kinetic effects are needed to explain the impact of magnetic topology on flows and radial electric fields. Hydrocarbon fuelling experiments in configurations with a low-order rational value in the rotational transform located in the proximity of the last closed flux surface (n ≤ 4/m ≤ 2) have shown the impurity screening properties related to the expected divertor effect. The first TJ-II experiments in neutral beam injection plasmas are reported.

AB - This paper presents an overview of experimental results and progress made in investigating the role of magnetic configuration on stability and transport in the TJ-II stellarator. Global confinement studies have revealed a positive dependence of energy confinement on the rotational transform and plasma density, together with different parametric dependences for metallic and boronized wall conditions. Spontaneous and biasing-induced improved confinement transitions, with some characteristics that resemble those of previously reported H-mode regimes in other stellarator devices, have been observed. Also, magnetic configuration scan experiments have shown an interplay between magnetic structure (rationals, magnetic shear), transport and electric fields. Although the dc radial electric fields are comparable with those expected from neoclassical calculations, additional mechanisms based on neoclassical/turbulent bifurcations and kinetic effects are needed to explain the impact of magnetic topology on flows and radial electric fields. Hydrocarbon fuelling experiments in configurations with a low-order rational value in the rotational transform located in the proximity of the last closed flux surface (n ≤ 4/m ≤ 2) have shown the impurity screening properties related to the expected divertor effect. The first TJ-II experiments in neutral beam injection plasmas are reported.

UR - https://www.scopus.com/pages/publications/26844533868

U2 - 10.1088/0029-5515/45/10/S22

DO - 10.1088/0029-5515/45/10/S22

M3 - Artículo

AN - SCOPUS:26844533868

SN - 0029-5515

VL - 47

SP - S677-S685

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 10

M1 - S16

ER -

Overview of TJ-II experiments

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