How ICF might evolve into a power plant:
https://firstlightfusion.com/technology/power-plant
Sent from my iPhone
On Dec 14, 2022, at 7:16 AM, glen <[email protected]> wrote:
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:
https://lasers.llnl.gov/news/magnetized-targets-boost-nif-implosion-performance
https://spie.org/news/nuclear-fusion-nifs-hall-of-mirrors-may-solve-worlds-energy-crisis?SSO=1
https://www.science.org/content/article/fusion-power-may-run-fuel-even-gets-started
https://arstechnica.com/science/2022/12/what-enabled-the-big-boost-in-fusion-energy-announced-this-week/
On 12/13/22 16:23, Steve Smith wrote:
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.
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?
The Wikipedia Entry on ICF is pretty good:
https://en.wikipedia.org/wiki/Inertial_confinement_fusion
I found several popular science Articles which seem to reinforce my
sense
that this "breakthrough" is not as significant as implied:
https://www.science.org/content/article/fusion-breakthrough-nif-uh-not-really
Other interesting/relevant links regarding D-T and D-D fusion...
https://www.researchgate.net/publication/263507001_Species_separation_and_modification_of_neutron_diagnostics_in_inertial-confinement_fusion/figures?lo=1
https://www.energy.gov/science/doe-explainsnuclear-fusion-reactions <
https://www.energy.gov/science/doe-explainsnuclear-fusion-reactions>
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
On 12/13/22 4:36 PM, glen 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 <[email protected] <mailto:
[email protected]>> 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.
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