Record performance in the DIII-D apparatus

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Munchausen
Posts: 129
Joined: Mon Sep 17, 2007 5:36 pm
Location: Nikaloukta

Record performance in the DIII-D apparatus

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

https://www.globenewswire.com/news-rele ... 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.

Skipjack
Posts: 6002
Joined: Sun Sep 28, 2008 2:29 pm

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.

crowberry
Posts: 486
Joined: Sun Sep 08, 2013 6:34 am

Re: Record performance in the DIII-D apparatus

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

This is the General Atomics press release: http://ga.publishpath.com/recent-breakthrough-on-diii-d-enables-major-step-toward-economical-fusion-energy and this is their corresponding (paywalled) paper in Nuclear Fusion: https://iopscience.iop.org/article/10.1088/1741-4326/ab235b.

This looks indeed as an important tokamak breakthrough.


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