Design and Preliminary Results of a Feedback Circuit for Plasma Displacement Control in IR-T1 Tokamak

Journal Article · Mon Apr 07 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2917025· OSTI ID:21137034

TalebiTaher, A; Ghoranneviss, M; Tarkeshian, R; Salem, M K ^[1]; Khorshid, P ^[1]

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1. Plasma Physics Research Center, Islamic Azad University, Tehran (Iran, Islamic Republic of)

Since displacement is very important for plasma position control, in IR-T1 tokamak a combination of two cosine coils and two saddle sine coils is used for horizontal displacement measurement. According to the multiple moment theory, the output of these coils linearly depends to radial displacement of plasma column. A new circuit for adding these signals to feedback system designed and unwanted effects of other fields in final output compensated. After compensation and calibration of the system, the output of horizontal displacement circuits applied to feedback control system. By considers the required auxiliary vertical field, a proportional amplifier and driver circuit are constructed to drive power transistors these power transistors switch the feedback bank capacitors. In the experiment, a good linear proportionality between displacement and output observed by applying an appropriate feedback field, the linger confinement time in IR-T1 tokamak obtained, applying this system to discharge increased the plasma duration and realizes repetitive discharges.

• OSTI ID: 21137034
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 996; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLIFIERS
CALIBRATION
CONFINEMENT TIME
CONTROL
CONTROL SYSTEMS
DESIGN
FEEDBACK
PLASMA
PLASMA CONFINEMENT
SIGNALS
TOKAMAK DEVICES
TRANSISTORS