Abstract
Karlsruhe Institute of Technology (KIT) is doing research and development in the field of megawatt-class radio frequency (RF) sources (gyrotrons) for the Electron Cyclotron Resonance Heating (ECRH) systems of the International Thermonuclear Experimental Reactor (ITER) and the DEMOnstration Fusion Power Plant that will follow ITER. In the focus is the development and verification of the European coaxial-cavity gyrotron technology which shall lead to gyrotrons operating at an RF output power significantly larger than 1 MW CW and at an operating frequency above 200 GHz. A major step into that direction is the final verification of the European 170 GHz 2 MW coaxial-cavity pre-prototype at longer pulses up to 1 s. It bases on the upgrade of an already existing highly modular short-pulse (ms-range) pre-prototype. That pre-prototype has shown a world record output power of 2.2 MW already. This paper summarizes briefly the already achieved experimental results using the short-pulse pre-prototype and discusses in detail the design and manufacturing process of the upgrade of the pre-prototype toward longer pulses up to 1 s.
Highlights
At Karlsruhe Institute of Technology (KIT), the activities in gyrotron research and development shall lead to a gyrotron design that will fulfil the increasing requirements for a possible upgrade for the International Thermonuclear Experimental Reactor (ITER) [1] as well as the minimum requirements for a future DEMOnstration power plant (DEMO) [2], the nuclear fusion demonstration power plant that will follow ITER
Because of the possibility of larger emitter radius, the gyrotron can be operated at a larger operating beam current and at a higher radio frequency (RF) output power
KIT is pushing forward the coaxial-cavity gyrotron development by building up a modular longer pulse 170 GHz, 2 MW pre-prototype targeting at a pulse length of up to 1 s
Summary
Cite this article: Ruess S et al (2018). KIT coaxial gyrotron development: from ITER toward DEMO. Karlsruhe Institute of Technology (KIT) is doing research and development in the field of megawatt-class radio frequency (RF) sources (gyrotrons) for the Electron Cyclotron Resonance Heating (ECRH) systems of the International Thermonuclear Experimental Reactor (ITER) and the DEMOnstration Fusion Power Plant that will follow ITER. In the focus is the development and verification of the European coaxial-cavity gyrotron technology which shall lead to gyrotrons operating at an RF output power significantly larger than 1 MW CW and at an operating frequency above 200 GHz. A major step into that direction is the final verification of the European 170 GHz 2 MW coaxial-cavity pre-prototype at longer pulses up to 1 s. A major step into that direction is the final verification of the European 170 GHz 2 MW coaxial-cavity pre-prototype at longer pulses up to 1 s It bases on the upgrade of an already existing highly modular short-pulse (ms-range) pre-prototype. This paper summarizes briefly the already achieved experimental results using the short-pulse pre-prototype and discusses in detail the design and manufacturing process of the upgrade of the pre-prototype toward longer pulses up to 1 s
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