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In present-day fusion experiments, Electron Cyclotron Resonance
Heating (ECRH) with microwaves in the range of 28 - 170 GHz at
megawatt power levels are routinely used to heat
plasma, to drive plasma currents and to control
magnetohydrodynamic instabilities. IPF contributes to the
development of microwave heating and diagnostic components, the
experimental application of the devices and the interpretation of
experimental results.
For the transmission of high-power millimetre waves, oversized
waveguides as well as quasi-optical transmission lines are used.
IPF designs, simulates and tests novel microwave components as
well as complete transmission systems for various fusion
experiments as e.g. Wendelstein 7-X, ASDEX Upgrade or ITER. IPF
develops power combiners and switches which will allow to enhance
the performance of the fusion test reactor ITER.
The high-power microwaves are generated by gyrotrons.
At IPF, high-voltage power supplies are designed and built, which
fulfill the strict requirements of gyrotrons.
IPF is also involved in the experiments relying on the microwave
devices. On ASDEX Upgrade, the ECR heating process and the
influence of ECR current drive on neoclassical tearing modes are
investigated. In support of various fusion experiments, IPF
carries out full-wave simulations to study wave propagation and
mode conversion in plasmas.
Microwaves are also widely used for diagnosing
high-temperature fusion plasmas and IPF
contributes to the Doppler reflectometry diagnostics for turbulence
and flow investigations through the design of components and
simulations of experimental data.
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Contact for Diploma- und Masters theses: W. Kasparek
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Research Topics
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Experiments and Simulation Codes
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