2024 – Use stronger shaping, EC and helicon off-axis CD, and core-edge integration to increase duration at betaN~4

Use stronger shaping, EC and helicon off-axis CD, and core-edge integration to increase duration at betaN~4

2024 Research Campaign, Task Force: Integrated high beta-p Scenario

Purpose of Experiment

The proposed experiment aims to extend the high 𝛽𝑃 advanced tokamak scenario discharges to a fully non-inductive state using both stronger plasma shaping and additional off-axis current drive sources. The experiment will build on one of the high-performance shots from past high-𝛽𝑃 campaigns.

Experimental Approach

With the installation of the new stage 1 divertor, higher triangularity and larger volume plasmas are possible, which should improve MHD stability. Electron cyclotron and helicon off-axis current drive will be used to reach and sustain a fully non-inductive state for long time scales. In parallel, impurity gas puffing in the edge will be explored to trigger full plasma detachment, addressing the core-edge integration problem.

Interested in learning more about how engagement with DIII-D benefits the fusion industry and supply chain? Join us for the DIII-D Industry Event Day on Nov. 14th! Registration and further information can be found here.

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