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Safety factor profile requirements for electron ITB formation in TCV

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Olivier Sauter, Ambrogio Fasoli, Basil Duval, Timothy Goodman, Stefano Coda, Yves Martin, Jean-Marc Moret, Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, René Chavan, Laurie Porte, Alexander Karpushov, Damien Fasel, Xavier Llobet, Christian Schlatter, Yanis Andrebe, Pierre Lavanchy, Ugo Siravo, Pierre Etienne, Emmanuel Droz, Henri Weisen, Jonathan Bryan Lister, Richard Pitts, Sun Hee Kim, Antoine Pochelon, Kurt Appert, Jan Horacek, Yann Camenen, Roland Behn, Marco Wischmeier, Mikhail Maslov, Markus Siegrist, Alberto Bottino, Emiliano Fable, Philippe Marmillod, Gilbert Tonetti, Albert Perez, Andrea Scarabosio, Costanza Zucca, Gilles Arnoux, Blaise Marlétaz, Alessandro Bortolon, Alessandro Marinoni, Pierre-François Isoz, Igor Klimanov, Jonathan Rossel, Jean-Claude Magnin, Barbora Bruant Gulejová, Ilya Pavlov, Alexey Zabolotskiy, Andrei Martynov, Karin Schombourg, Petri Nikkola
2005
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Abstract

On the Tokamak a Configuration Variable (TCV), electron internal transport barriers (eITBs) can be formed during a gradual evolution from a centrally peaked to a hollow current profile while all external actuators are held constant. The formation occurs rapidly (

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https://infoscience.epfl.ch/entities/publication/b3da0f78-3dde-4691-afc4-9ab7c44e71c5

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Related concepts (8)

An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. In simple terms, it is a "mover". An actuator requires a control device (controlled by control signal) and a source of energy. The control signal is relatively low energy and may be electric voltage or current, pneumatic, or hydraulic fluid pressure, or even human power. Its main energy source may be an electric current, hydraulic pressure, or pneumatic pressure.

A valve actuator is the mechanism for opening and closing a valve. Manually operated valves require someone in attendance to adjust them using a direct or geared mechanism attached to the valve stem. Power-operated actuators, using gas pressure, hydraulic pressure or electricity, allow a valve to be adjusted remotely, or allow rapid operation of large valves. Power-operated valve actuators may be the final elements of an automatic control loop which automatically regulates some flow, level or other process.

Linear actuator

A linear actuator is an actuator that creates motion in a straight line, in contrast to the circular motion of a conventional electric motor. Linear actuators are used in machine tools and industrial machinery, in computer peripherals such as disk drives and printers, in valves and dampers, and in many other places where linear motion is required. Hydraulic or pneumatic cylinders inherently produce linear motion. Many other mechanisms are used to generate linear motion from a rotating motor.

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