Record performance in the DIII-D apparatus

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Record performance in the DIII-D apparatus

Postby Munchausen » Thu Jun 27, 2019 12:53 pm ... nergy.html

In summary

Super-H Mode works by increasing temperature and pressure in the outer region of the plasma, called the pedestal. The experiments showed – as the theory predicted – that proper tuning of the plasma cross-sectional shape and density leads to pedestal temperatures and pressures that are more than twice as high as those of typical pedestals.

Because plasma conditions in the core – where fusion takes place – are dependent on conditions at the edge, Super-H Mode enables as much as a four-fold increase in fusion performance.

The DIII-D plasmas in Super H Mode experiments, if converted to DT fuel, would produce more than 4 million watts of fusion power. This corresponds to a fusion gain, the ratio of fusion power produced to heating power injected, of about ½, the highest ever achieved on DIII-D or other tokamaks of similar size.

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Re: Record performance in the DIII-D apparatus

Postby Skipjack » Thu Jun 27, 2019 2:23 pm

I wished they would try to break their old record at JET, but it is not a priority. With this Super H Mode, they _might_ be able to reach a Q>1.

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Re: Record performance in the DIII-D apparatus

Postby crowberry » Thu Jun 27, 2019 3:37 pm

This is the General Atomics press release: and this is their corresponding (paywalled) paper in Nuclear Fusion:

This looks indeed as an important tokamak breakthrough.

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