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How ICF might evolve into a power plant:
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<div> <a href="https://firstlightfusion.com/technology/power-plant">https://firstlightfusion.com/technology/power-plant</a><br>
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<blockquote type="cite">On Dec 14, 2022, at 7:16 AM, glen <gepropella@gmail.com> wrote:<br>
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<div dir="ltr">\ufeff<span>Excellent! Thanks. I think I'll have to push this topic for another day. I've got a few more links from other fora I'll plop here just in case I only land back here if/when I pop it off the stack later:</span><br>
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<span>https://lasers.llnl.gov/news/magnetized-targets-boost-nif-implosion-performance</span><br>
<span>https://spie.org/news/nuclear-fusion-nifs-hall-of-mirrors-may-solve-worlds-energy-crisis?SSO=1</span><br>
<span>https://www.science.org/content/article/fusion-power-may-run-fuel-even-gets-started</span><br>
<span>https://arstechnica.com/science/2022/12/what-enabled-the-big-boost-in-fusion-energy-announced-this-week/</span><br>
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<span>On 12/13/22 16:23, Steve Smith wrote:</span><br>
<blockquote type="cite"><span>I think DT refers simply to the remaining fraction of Deuterium/Tritium remaining after the reaction event (-4%) without specific accounting for remaining D vs T.</span><br>
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<blockquote type="cite"><span>My understanding is that D-T fusion occurs at a lower temperature than D-D but that once fusion commences (starting with D-T), both D-T and D-D reactions occurring in similar amounts. In laser-driven ICF (as with NIF) I believe
the ratio of D/T is nominally 50/50 though it would seem to make sense to have a higher T to D ratio but most references I see imply equal portions. An equal number of D-D and D-T reactions would seem to consume D more quickly, though as that commences,
the D/T ratio would go down, making D-T reactions (yet) more likely... tricky business, no wonder it has taken decades to get to this point?</span><br>
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<blockquote type="cite"><span>The Wikipedia Entry on ICF is pretty good: https://en.wikipedia.org/wiki/Inertial_confinement_fusion</span><br>
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<blockquote type="cite"><span>I found several popular science Articles which seem to reinforce my sense that this "breakthrough" is not as significant as implied:</span><br>
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<blockquote type="cite"><span> https://www.science.org/content/article/fusion-breakthrough-nif-uh-not-really</span><br>
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<blockquote type="cite"><span>Other interesting/relevant links regarding D-T and D-D fusion...</span><br>
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<blockquote type="cite"><span>https://www.researchgate.net/publication/263507001_Species_separation_and_modification_of_neutron_diagnostics_in_inertial-confinement_fusion/figures?lo=1</span><br>
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<blockquote type="cite"><span>https://www.energy.gov/science/doe-explainsnuclear-fusion-reactions <https://www.energy.gov/science/doe-explainsnuclear-fusion-reactions></span><br>
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<blockquote type="cite"><span>https://science.jrank.org/pages/4732/Nuclear-Fusion-D-D-D-T-reactions.html <https://science.jrank.org/pages/4732/Nuclear-Fusion-D-D-D-T-reactions.html></span><br>
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<blockquote type="cite"><span>On 12/13/22 4:36 PM, glen wrote:</span><br>
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<blockquote type="cite"><span>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?</span><br>
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<blockquote type="cite"><span>On 12/13/22 09:22, Frank Wimberly wrote:</span><br>
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<blockquote type="cite"><span>DT = deuterium?</span><br>
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<blockquote type="cite"><span>---</span><br>
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<blockquote type="cite"><span>Frank C. Wimberly</span><br>
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<blockquote type="cite"><span>140 Calle Ojo Feliz,</span><br>
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<blockquote type="cite"><span>Santa Fe, NM 87505</span><br>
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<blockquote type="cite"><span>505 670-9918</span><br>
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<blockquote type="cite"><span>Santa Fe, NM</span><br>
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<blockquote type="cite"><span>On Tue, Dec 13, 2022, 10:21 AM glen <gepropella@gmail.com <mailto:gepropella@gmail.com>> wrote:</span><br>
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<blockquote type="cite"><span> Awesome. Thanks. I'm still trying to catch up with the QC Wormhole kerfuffle. Who knew Quanta was so click baity?</span><br>
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<blockquote type="cite"><span> What is "DT"?</span><br>
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<blockquote type="cite"><span> On 12/13/22 09:02, Marcus Daniels wrote:</span><br>
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<blockquote type="cite"><span> > In case no one wanted to get up at 7:00am to watch DOE administrators talk:</span><br>
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<blockquote type="cite"><span> > 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.</span><br>
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<blockquote type="cite"><span> > 2. 8% more power on the laser this time</span><br>
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<blockquote type="cite"><span> > 3. x-ray tomography is used to find flaws in the capsules. Developing software to do the counting.</span><br>
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<blockquote type="cite"><span> > 4. They have ongoing efforts to study the fabrication systems and their components (done in Germany) to find idiosyncrasies of each.</span><br>
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<blockquote type="cite"><span> > 5. Laser technology improvements since NIF was built which are 20% more efficient.</span><br>
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<blockquote type="cite"><span> > 6. Target cost is from labor, and it takes 7 months each</span><br>
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<blockquote type="cite"><span> > 7. 4% of DT is burned in a shot</span><br>
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<blockquote type="cite"><span> > 8. Machine learning ties together radiation hydrodynamics and experimental data. (It sounded preliminary.)</span><br>
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<blockquote type="cite"><span> > 9. The (successful) capsule had more defects than previous experiments. However, previous experiments did show benefits from capsule quality.</span><br>
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<blockquote type="cite"><span> > 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.</span><br>
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<blockquote type="cite"><span> > 11. Anomalous laser directional control were problems in the summer runs. Fixed that.</span><br>
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<span>-- </span><br>
<span>\ua66e M\u0265\u01ddu \u01ddl\u01ddd\u0265\u0250u\u0287s \u025f\u1d09\u0183\u0265\u0287' \u0287\u0265\u01dd \u0183\u0279\u0250ss sn\u025f\u025f\u01dd\u0279s\u02d9 \ua66e</span><br>
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