Design of Electron Cyclotron Heating and Current Drive System of ITER

Journal Article · Fri Sep 28 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2800520· OSTI ID:21035895

Kobayashi, N ^[1]; Bigelow, T; Rasmussen, D ^[2]; Bonicelli, T; Ramponi, G; Saibene, G ^[3]; Cirant, S ^[4]; Denisov, G ^[5]; Heidinger, R; Piosczyk, B ^[6]; Henderson, M; Hogge, J -P; Thumm, M; Tran, M Q ^[7]; Rao, S L ^[8]; Sakamoto, K; Takahashi, K ^[9]; Temkin, R J ^[10]; Verhoeven, A G. A. ^[11]; Zohm, H ^[12]

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1. ITER, Cadarache (France)
2. ORNL, Oak Ridge (United States)
3. EFDA, Garching (Germany)
4. ENEA-CNR, Milan (Italy)
5. IAP, Nizhny Novgorod (Russian Federation)
6. FZK, Karlsruhe (Germany)
7. CRPP, Lausanne (Switzerland)
8. IPR, Bhat (India)
9. JAEA, Naka (Japan)
10. MIT PSFC, Cambridge (United States)
11. FOM IPP, Rijnhuizen (Netherlands)
12. MPI IPP, Garching (Germany)

Since the end of EDA, the design of the Electron Cyclotron Heating and Current Drive (ECH and CD) system has been modified to respond to progress in physics understanding and change of interface conditions. Nominal RF power of 20 MW is shared by four upper launchers or one equatorial launcher RF beams are steered by front steering mirrors providing wide sweeping angle for the RF beam. DC high voltage power supply may be composed of IGBT pulse step modulators because of high frequency modulation and design flexibility to three different types of 170 GHz gyrotrons provided by three parties. The RF power from the 170 GHz gyrotron is transmitted to the launcher by 63.5 mm{phi} corrugated waveguide line and remotely switched by a waveguide switch between the upper launcher and the equatorial launcher. The ECH and CD system has also a start-up sub-system for assist of initial discharge composed of three 127.5 GHz gyrotrons and a dedicated DC high voltage power supply. Three of transmission lines are shared between 170 GHz gyrotron and 127.5 GHz gyrotron so as to inject RF beam for the start-up through the equatorial launcher. R and Ds of components for high power long pulse and mirror steering mechanism have been on-going in the parties to establish a reliable ITER ECH and CD system.

• OSTI ID: 21035895
• Journal Information: AIP Conference Proceedings, Vol. 933, Issue 1; Conference: 17. topical conference on radio frequency power in plasmas, Clearwater, FL (United States), 7-9 May 2007; Other Information: DOI: 10.1063/1.2800520; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DESIGN
ECR HEATING
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
FREQUENCY MODULATION
GHZ RANGE
INTERFACES
ITER TOKAMAK
MICROWAVE AMPLIFIERS
PLASMA
POWER TRANSMISSION LINES
PULSES
RF SYSTEMS
START-UP
WAVEGUIDES