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3 results on '"J. de la Gama"'

1. Overview of TJ-II experiments

Author

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. Brañas, 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-Regaña, 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 Peña, 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, and B. Zurro

Subjects
Nuclear and High Energy Physics, Condensed Matter Physics
Published
2007
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2. Fast movable remotely controlled Langmuir probe system

Author

E. Sánchez, A. Gabriel, R.B. Perez, J. Encabo, A. Montoro, Angel R. Lopez-Sanchez, J. de la Gama, L. M. Martı́nez, M. A. Pedrosa, C. Hidalgo, and C. Sierra

Subjects
Materials science, Acoustics, Plasma, Displacement (vector), law.invention, Reciprocating motion, symbols.namesake, law, Position (vector), Control system, symbols, Langmuir probe, Resistor, Instrumentation, Stellarator
Abstract

A versatile remotely controlled fast reciprocating Langmuir probe has been developed for the TJ-II stellarator. The main components of the system are a removable head, containing the measurement tips, and a displacement system that enables the probe to be displaced in vacuum. The probe displacement system has two different components: a slow one (course length⩽0.8 m) to set the probe at the initial measurement position, and a fast one (run length=0.1 m) to obtain the desired measurements within an adjustable time interval during the plasma discharge. The radial movement of the probe is controlled remotely by means of a programmable logical control system, with a radial resolution of better than 1 mm. The fast displacement of the probe (up to 1.7 m/s) is achieved by using a pneumatic system. Its position as a function of time is monitored by means of the on-line response of a linear resistor attached to the fast displacement system.

Published
1999
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3. First Results of the TJ-I U Torsatron

Author

M. Francés, E. Ascasíbar, L.M. Kovrizhnykh, J. Alonso, A. Varias, Francisco Castejón, M.C. Rodríguez Fernández, Victor Tribaldos, G. Gómez, L. Pacios, B. Ph. van Milligen, Francisco L. Tabarés, E. Sánchez González, J. Sánchez Sanz, E. de la Luna, C. Alejaldre, J. López Rázola, I. S. Sbitnikova, N. Kharchev, T. Estrada, F. de Aragón, J. Qin, R. Martín García, L.V. Kolik, I. García Cortés, F. Medina, R. Fernández, B.M. Rassadin, Yu.I. Netchaev, V. Krivenski, L.M. Martínez, J. De La Gama, B. Brañas, K. M. Likin, Macarena Liniers, L. Pallás, J.A. Jiménez Aparicio, D Akulina, D. Tafalla, F. Rufino, J. Vega, E. de la Cal, E. Martín Roquero, M.A. Pedrosa, P. Ortiz, I. Labrador, C. Hidalgo, G. Catalán, J.R. Cepero, J. Guasp, J. Herranz, A. López-Fraguas, A. Sánchez Corpas, F. Lapayese, A.Ye. Petrov, O. F. Fedyanin, M. Medrano, C. Sierra, J. Castrejón, I. Pastor, B. Zurro, N.V. Matveev, M. A. Ochando, Ye.M. Tai, S. Grebenshchikov, L. Sánchez-Cabezudo, R. Balbín, A. Jiménez Dcnche, K.A. Sarksyan, A. López Sánchez, A. Salas, L. Rodríguez Rodrigo, and L. García Gonzalo

Subjects
Physics, Electron density, General Engineering, Plasma, law.invention, Surface mapping, symbols.namesake, law, Gyrotron, Harmonic, symbols, Electron temperature, Langmuir probe, Atomic physics
Abstract

In April 1994 first ECRH plasmas (28 GHz, 2nd harmonic) have been produced in the TJ-I U torsatron (R=0.6m, [a]=0.1m, B(0)=0.52 T, E(0)=0.21). In November 1994 a second experimental campaign using a 37.5 GHz gyrotron (B(o)=0.69 T) has started. The main parameters of the device, the basic characteristics of the heating system and some results concerning magnetic surface mapping and first plasma discharges, are reported. 4 refs., 4 figs.

Published
1995
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