Engineering aspects of the ISTTOK operation in a multicycle alternating flat-top plasma current regime
| Autor: | Ricardo Magnus Osorio Galvao, H Figueiredo, Horacio Fernandes, J.A.C. Cabral, C.A.F. Varandas |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Electrolytic capacitor
Tokamak Materials science Mechanical Engineering Nuclear engineering Insulated-gate bipolar transistor Plasma law.invention Nuclear magnetic resonance Nuclear Energy and Engineering law Electromagnetic coil General Materials Science Alternating current ISTTOK Civil and Structural Engineering Electronic circuit |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/s0920-3796(98)00263-4 |
| Popis: | The main engineering aspects of the tokamak ISTTOK operation in a multicycle alternating flat-top plasma current regime are presented. AC discharges have been obtained feeding the ohmic and vertical magnetic field circuits with a specially designed alternating power supply, based on a single electrolytic capacitor bank and a fast insulated gate bipolar transistor (IGBT) H-bridge, feedback controlled by a discreet power DAC. The horizontal magnetic field has been created by an independent and pre-programmable DC power supply. The optimization of AC operation has also implied the installation of a new set of symmetric and more external windings for the vertical B-field and of an adequate gas puffing system. Discharges with seven half-cycles and flat-top plasma currents of about ±4 kA without dwell times were already achieved, in a total time span of 240 ms approximately equal to five times the maximum duration of a single DC discharge. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect