[FRIAM] technical notes on fusion announcement
Carl Tollander
carl at plektyx.com
Tue Dec 13 19:04:06 EST 2022
Sabine Hossenfelder holds forth on fusion and measures of break-even. Over
a year old, but still....
http://backreaction.blogspot.com/2021/10/how-close-is-nuclear-fusion-power.html
On Tue, Dec 13, 2022 at 4:37 PM glen <gepropella at gmail.com> wrote:
> That's why I asked. I guess I'll assume DT means both deuterium and
> tritium, not just deuterium. If you were going to track fuel use, you'd
> track the rarer part more closely, right?
>
> On 12/13/22 09:22, Frank Wimberly wrote:
> > DT = deuterium?
> >
> > ---
> > Frank C. Wimberly
> > 140 Calle Ojo Feliz,
> > Santa Fe, NM 87505
> >
> > 505 670-9918
> > Santa Fe, NM
> >
> > On Tue, Dec 13, 2022, 10:21 AM glen <gepropella at gmail.com <mailto:
> gepropella at gmail.com>> wrote:
> >
> > Awesome. Thanks. I'm still trying to catch up with the QC Wormhole
> kerfuffle. Who knew Quanta was so click baity?
> >
> > What is "DT"?
> >
> > On 12/13/22 09:02, Marcus Daniels wrote:
> > > In case no one wanted to get up at 7:00am to watch DOE
> administrators talk:
> > >
> > >
> > > 1. Controlling the laser in space and time was important for
> maintaining symmetry. Timing precision of 25e-12 secs and laser spatial
> precision of 5e-12 meter were needed. This was thought to be the main
> explanation for the achievement.
> > >
> > > 2. 8% more power on the laser this time
> > >
> > > 3. x-ray tomography is used to find flaws in the capsules.
> Developing software to do the counting.
> > >
> > > 4. They have ongoing efforts to study the fabrication systems and
> their components (done in Germany) to find idiosyncrasies of each.
> > >
> > > 5. Laser technology improvements since NIF was built which are
> 20% more efficient.
> > >
> > > 6. Target cost is from labor, and it takes 7 months each
> > >
> > > 7. 4% of DT is burned in a shot
> > >
> > > 8. Machine learning ties together radiation hydrodynamics and
> experimental data. (It sounded preliminary.)
> > >
> > > 9. The (successful) capsule had more defects than previous
> experiments. However, previous experiments did show benefits from capsule
> quality.
> > >
> > > 10. 15% of experiments are indirect drive of this kind, 15% of
> experiments are other approaches to ignition. The rest are weapons and
> materials characterization.
> > >
> > > 11. Anomalous laser directional control were problems in the
> summer runs. Fixed that.
>
>
> --
> ꙮ Mɥǝu ǝlǝdɥɐuʇs ɟᴉƃɥʇ' ʇɥǝ ƃɹɐss snɟɟǝɹs˙ ꙮ
>
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