For disruption mitigation experiments in Tokamaks, two types of fast gas valves were developed, build and tested. A spring-driven valve (max. gas inventory 640 Pam³, opening time 1.5 ms) and a piezo-driven valve (210 Pam³, 3.5 ms). Both valves were tested in a special test bed, measuring opening times, performing 2000 operational cycles including baking at 150 °C and assessing the expanding gas clouds. After successful completion of the laboratory tests, the valves were installed in the Tokamak ASDEX Upgrade and proved to work reliably during plasma operation.
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For disruption mitigation experiments in Tokamaks, two types of fast gas valves were developed, build and tested. A spring-driven valve (max. gas inventory 640 Pam³, opening time 1.5 ms) and a piezo-driven valve (210 Pam³, 3.5 ms). Both valves were tested in a special test bed, measuring opening times, performing 2000 operational cycles including baking at 150 °C and assessing the expanding gas clouds. After successful completion of the laboratory tests, the valves were installed in the Tokamak...
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