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Design considerations of the European DEMO's IR-interferometer/polarimeter based on TRAVIS simulations

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arxiv 2112.09363 v2 pith:CHPPW373 submitted 2021-12-17 physics.ins-det physics.plasm-ph

Design considerations of the European DEMO's IR-interferometer/polarimeter based on TRAVIS simulations

classification physics.ins-det physics.plasm-ph
keywords controldemodensityplasmatraviswillaccountingaddition
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Interferometry is the primary density control diagnostic for large-scale fusion devices, including ITER and DEMO. In this paper we present a ray tracing simulation based on TRAVIS accounting for relativistic effects. The study shows that measurements will over-estimate the plasma density by as much as 20 degree. In addition, we present a measurement geometry, which will enable vertical position control during the plasma's ramp-up phase when gap-reflectometers and neutron cameras are still blind.

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