SMuK 2021 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 17: Poster II
P 17.12: Poster
Freitag, 3. September 2021, 14:00–16:00, P
Diagnostics for the JT-60SA pellet source commissioning — •Jan-Henrik Ufer1, Peter Lang2, Bernhard Plöckl2, Martin Prechtl1, and ASDEX Uprade Team2 — 1Hochschule Coburg — 2Max-Planck-Institut für Plasmaphsyik
JT-60SA is a superconducting tokamak currently under commissioning in Naka, Japan. It was built in a collaboration between Europe and Japan aiming to resolve key physics and engineering issues for ITER and a future fusion reactor. Equipped with superconducting coils it will be capable to investigate long lasting advanced modes of plasma operation for pulse durations up to 100 s. In this context, exploration of the high density regime and ELM control is envisaged. Therefore, a novel pellet system - pellets are mm sized solid hydrogen bodies - is under construction serving for both tasks. Any task got an accordingly designed pellet source attributed. Both the commercially supplied sources will be tested and commissioned in a dedicated European test stand. There, quality and mass throughput of the extruded ice rod as well as the quality and maximum achievable rate of pellets cut from this rod have to be diagnosed. A monochrome camera system comprises a video mode to record the initial ice extrusion and a stroboscopic mode to monitor pellet production with a flash laser. The laser is synchronised with the cutter actuation, emitting short light pulses imaging pellets avoiding movement blur. The contribution will show the designed layout of the pellet system, our diagnostics unit and the planned test sequences for the fuelling and the pacing pellet sources.