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8 results on '"Cepero, J R"'

1. Confinement and stability on the TJ-II stellarator

Author

Ascas bar, E, primary, Alejaldre, C, additional, Alonso, J, additional, Almoguera, L, additional, Baciero, A, additional, Balb n, R, additional, Blanco, E, additional, Blaumoser, M, additional, Botija, J, additional, Bra as, B, additional, Cappa, A, additional, Carrasco, R, additional, Castej n, F, additional, Cepero, J R, additional, Chmyga, A A, additional, Doncel, J, additional, Dreval, N B, additional, Eguilior, S, additional, Eliseev, L, additional, Estrada, T, additional, Fedyanin, O, additional, Fern ndez, A, additional, Fontdecaba, J M, additional, Fuentes, C, additional, Garc a, A, additional, Garc a-Cort s, I, additional, Gon alves, B, additional, Guasp, J, additional, Herranz, J, additional, Hidalgo, A, additional, Hidalgo, C, additional, Jim nez, J A, additional, Kirpitchev, I, additional, Khrebtov, S M, additional, Komarov, A D, additional, Kozachok, A S, additional, Krupnik, L, additional, Lapayese, F, additional, Likin, K, additional, Liniers, M, additional, L pez-Bruna, D, additional, L pez-Fraguas, A, additional, L pez-R zola, J, additional, L pez-S nchez, A, additional, Luna, E de la, additional, Malaquias, A, additional, Mart n, R, additional, Medrano, M, additional, Melnikov, A V, additional, M ndez, P, additional, McCarthy, K J, additional, Medina, F, additional, Milligen, B van, additional, Nedzelskiy, I S, additional, Ochando, M, additional, Pacios, L, additional, Pastor, I, additional, Pedrosa, M A, additional, Pe a, A de la, additional, Petrov, A, additional, Petrov, S, additional, Portas, A, additional, Romero, J, additional, Rodr guez-Rodrigo, L, additional, Salas, A, additional, S nchez, E, additional, S nchez, J, additional, Sarksian, K, additional, Schchepetov, S, additional, Skvortsova, N, additional, Tabar s, F, additional, Tafalla, D, additional, Tribaldos, V, additional, Varandas, C F A, additional, Vega, J, additional, and Zurro, B, additional

Published
2002
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2. Transport Properties in the TJ-II Flexible Heliac.

Author

Castejón, F., Ascasíbar, E., Alejaldre, C., Alonso, J., Almoguera, L., Baciero, A., Balbín, R., Blanco, E., Blaumoser, M., Botija, J., Brañas, B., Cappa, A., Carrasco, R., Cepero, J. R., Chmyga, A. A., Doncel, J., Dreval, N. B., Eguilior, S., and Eliseev, L.

Subjects
PLASMA density, PLASMA gases, HEAVY ions, PLASMA turbulence, SHEAR flow
Abstract

TJ-II flexibility is exploited to perform an investigation on the transport properties of this device. Rotational transform can be varied in a wide range, which allows one to introduce low order rationals and to study their effect on transport. On the other hand, confinement properties can be studied at very different rotational transform values and for different values of magnetic shear: Experiments on influence of the magnetic shear on confinement are reported. Plasma potential profiles have been recently measured in some configurations up to the plasma core with the Heavy Ion Beam Probe (HIBP) diagnostic and the electric field values measured in low-density plasmas are consistent with neoclassical calculations near the plasma core. Plasma edge turbulent transport has been studied in configurations that are marginally stable due to decreased magnetic well. Results show a dynamical coupling between gradients and turbulent transport. [ABSTRACT FROM AUTHOR]

Published
2003

3. Confinement studies in the TJ-II stellarator

Author

Alejaldre, C, primary, Alonso, J, additional, Almoguera, L, additional, bar, E Ascasí, additional, Baciero, A, additional, Balbín, R, additional, Blaumoser, M, additional, Botija, J, additional, Brañas, B, additional, Cal, E de la, additional, Cappa, A, additional, Carrasco, R, additional, Castejón, F, additional, Cepero, J R, additional, Cremy, C, additional, Delgado, J M, additional, Doncel, J, additional, Dulya, C, additional, Estrada, T, additional, Fernández, A, additional, Fuentes, C, additional, García, A, additional, a-Cortés, I Garcí, additional, Guasp, J, additional, Herranz, J, additional, Hidalgo, C, additional, Jiménez, J A, additional, Kirpitchev, I, additional, Krivenski, V, additional, Labrador, I, additional, Lapayese, F, additional, Likin, K, additional, Linier, M, additional, López-Fraguas, A, additional, López-Sánchez, A, additional, Luna, E de la, additional, Martín, R, additional, Martinez, A, additional, Martínez-Laso, L, additional, Medrano, M, additional, Méndez, P, additional, McCarthy, K J, additional, Medina, F, additional, Milligen, B van, additional, Ochando, M, additional, Pacios, L, additional, Pastor, I, additional, Pedrosa, M A, additional, Peña, A de la, additional, Portas, A, additional, Qin, J, additional, Rodríguez-Rodrigo, L, additional, Salas, A, additional, Sánchez, E, additional, Sánchez, J, additional, Tabarés, F, additional, Tafalla, D, additional, Tribaldos, V, additional, Vega, J, additional, Zurro, B, additional, Akulina, D, additional, Fedyanin, O I, additional, Grebenshchikov, S, additional, Kharchev, N, additional, Meshcheryakov, A, additional, Sarksian, K A, additional, Barth, R, additional, Dijk, G van, additional, and Meiden, H van der, additional

Published
1999
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4. First plasmas in the TJ-II flexible Heliac

Author

Alejaldre, C, primary, Alonso, J, additional, Almoguera, L, additional, Ascasíbar, E, additional, Baciero, A, additional, Balbín, R, additional, Blaumoser, M, additional, Botija, J, additional, Brañas, B, additional, Cal, E de la, additional, Cappa, A, additional, Carrasco, R, additional, Castejón, F, additional, Cepero, J R, additional, Cremy, C, additional, Doncel, J, additional, Dulya, C, additional, Estrada, T, additional, Fernández, A, additional, Francés, M, additional, Fuentes, C, additional, García, A, additional, García-Cortés, I, additional, Guasp, J, additional, Herranz, J, additional, Hidalgo, C, additional, Jiménez, J A, additional, Kirpitchev, I, additional, Krivenski, V, additional, Labrador, I, additional, Lapayese, F, additional, Likin, K, additional, Liniers, M, additional, López-Fraguas, A, additional, López-Sánchez, A, additional, Luna, E de la, additional, Martín, R, additional, Martínez, A, additional, Medrano, M, additional, Méndez, P, additional, McCarthy, K, additional, Medina, F, additional, Milligen, B van, additional, Ochando, M, additional, Pacios, L, additional, Pastor, I, additional, Pedrosa, M.A, additional, Peña, A de la, additional, Portas, A, additional, Qin, J, additional, Rodríguez-Rodrigo, L, additional, Salas, A, additional, Sánchez, E, additional, Sánchez, J, additional, Tabarés, F, additional, Tafalla, D, additional, Tribaldos, V, additional, Vega, J, additional, Zurro, B, additional, Akulina, D, additional, Fedyanin, O I, additional, Grebenshchicov, S, additional, Kharchev, N, additional, Meshcheryakov, A, additional, Barth, R, additional, Dijk, G van, additional, Meiden, H van der, additional, and Petrov, S, additional

Published
1999
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6. Confinement and stability on the TJ-II stellarator

Author

Ascasíbar, E, Alejaldre, C, Alonso, J, Almoguera, L, Baciero, A, Balbín, R, Blanco, E, Blaumoser, M, Botija, J, Brañas, B, Cappa, A, Carrasco, R, Castejón, F, Cepero, J R, Chmyga, A A, Doncel, J, Dreval, N B, Eguilior, S, Eliseev, L, Estrada, T, Fedyanin, O, Fernández, A, Fontdecaba, J M, Fuentes, C, García, A, García-Cortés, I, Gonçalves, B, Guasp, J, Herranz, J, Hidalgo, A, Hidalgo, C, Jiménez, J A, Kirpitchev, I, Khrebtov, S M, Komarov, A D, Kozachok, A S, and L

Abstract

This paper describes a series of experiments performed in TJ-II stellarator with the aim of studying the influence of magnetic configuration on stability and transport properties of TJ-II plasmas. Plasma potential profiles have been measured in several configurations up to the plasma core with the heavy ion beam probe diagnostic. Low-order rational surfaces have been positioned at different plasma radii observing the effect on transport features. Plasma edge turbulent transport has been studied in configurations that are marginally stable due to decreased magnetic well. Results show a dynamical coupling between gradients and turbulent transport. Experiments on the influence of magnetic shear on confinement are reported. Global confinement issues as well as enhanced confinement regimes found in TJ-II are discussed as well.

Published
2002

7. FIRST RESULTS OF THE TJ-I-U TORSATRON

Author

Ascasibar, E., Alejaldre, C., Alonso, J., Dearagon, F., Balbin, R., Branas, B., Delacal, E., Castejon, F., Castrejon, J., Catalan, G., Cepero, J. R., Estrada, T., Fernandez, R., Frances, M., Delagama, J., Gonzalo, L. G., Cortes, I. G., Gomez, G., Guasp, J., Herranz, J., Hidalgo, C., Aparicio, J. A. J., Denche, A. J., Krivenski, V., Labrador, I., Lapayese, F., Liniers, M., Lopezfraguas, A., Razola, J. L., Sanchez, A. L., Delaluna, E., Garcia, R. M., Roquero, E. M., Martinez, L. M., Medina, F., Medrano, M., Vanmilligen, B. P., Ochando, M. A., Ortiz, P., Pacios, L., Pallas, L., Pastor, I., Pedrosa, M. A., Qin, J., Fernandez, M. C. R., Rodrigo, L. R., Rufino, F., Salas, A., Sanchezcabezudo, L., Corpas, A. S., Gonzalez, E. S., Sanz, J. S., Sierra, C., Tabares, F., Tafalla, D., Tribaldos, V., Varias, A., Vega, J., Zurro, B., Kovrizhnykh, L. M., Akulina, D. C., Fedyanin, O. F., Grebenshchikov, S., Kharchev, N., Kolik, L. V., Likin, K. M., Netchaev, Y. I., Petrov, A. Y., Karen Sarksyan, Sbitnikova, I., Matveev, N. V., Rassadin, B. M., and Tai, Y. M.

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