US Electron Cyclotron Transmission Lines
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A waveguide inspection camera was developed to evaluate transmission line manufacturing. Photo: US ITER US Contribution The US is responsible for the electron cyclotron (EC) transmission lines, including R&D, design and fabrication. Overview The electron cyclotron system heats the electrons in the plasma with a high-intensity beam of electromagnetic radiation. This system will be used to deposit heat in very specific places in the plasma. Power will be provided by high-frequency gyrotrons. The US transmission line design will provide efficient power (20 MW) transfer from 170 GHz gyrotron sources to launchers in the tokamak port plugs. The transmission lines feature multiple lines of evacuated aluminum waveguides with internal corrugations that can transmit 1.4 MW per line, while minimizing power transfer losses to ≤ 10%. Approximately 4 km of transmission line will be part of this system, connecting 24 sources to 56 feeds. 1 st Plasma Scope Perform R&D and design for the full system, and procurement and testing for the components of the EC transmission lines needed for gyrotron commissioning and 1 st plasma initiation plus captive lines in the tokamak building. Status In final design and prototype testing for First Plasma hardware. Electron Cyclotron Transmission Lines Waveguide switch prototype. Photo: US ITER/ORNL Electron cyclotron transmission lines design. Image: US ITER US ITER Project Office • 1055 Commerce Park • Oak Ridge, Tennessee 37830-6483 US www.usiter.org
Transcript of US Electron Cyclotron Transmission Lines
A waveguide inspection camera was developed to evaluate transmission line manufacturing. Photo: US ITER
US Contribution The US is responsible for the electron cyclotron (EC) transmission lines, including R&D, design and fabrication.
OverviewThe electron cyclotron system heats the electrons in the plasma with a high-intensity beam of electromagnetic radiation. This system will be used to deposit heat in very specific places in the plasma. Power will be provided by high-frequency gyrotrons. The US transmission line design will provide efficient power (20 MW) transfer from 170 GHz gyrotron sources to launchers in the tokamak port plugs.
The transmission lines feature multiple lines of evacuated aluminum waveguides with internal corrugations that can transmit 1.4 MW per line, while minimizing power transfer losses to ≤ 10%. Approximately 4 km of transmission line will be part of this system, connecting 24 sources to 56 feeds.
1st Plasma ScopePerform R&D and design for the full system, and procurement and testing for the components of the EC transmission lines needed for gyrotron commissioning and 1st plasma initiation plus captive lines in the tokamak building.
StatusIn final design and prototype testing for First Plasma hardware.
Electron Cyclotron Transmission Lines
Waveguide switch prototype. Photo: US ITER/ORNL
Electron cyclotron transmission lines design. Image: US ITER
US ITER Project Office • 1055 Commerce Park • Oak Ridge, Tennessee 37830-6483
US
www.usiter.org
US
Transmission line expansion unit prototypes. Photo: US ITER/ORNL
Electron Cyclotron Transmission Lines
Body of a 140 degree mitre bend prototype. Photo: US ITER/ORNL
US-produced waveguide in a test stand at The National Institutes for Quantum and Radiological
Science and Technology in Japan. Photo: US ITER
www.usiter.org • www.iter.org • www.doe.gov • www.science.doe.gov
Kurt Vetter US ITER Project Office Electron Cyclotron Transmission Lines Team Leader
Oak Ridge National Laboratory [email protected] | 865-241-9702
Technical Description• Power transfer from 170 GHz gyrotron sources to launchers
• 20 MW of plasma heating power
• 24 sources to 56 feeds
• 4 km of transmission line
• Power losses < 10%
