Posted on 02/27/2021 11:40:42 PM PST by Kevmo
NASA Funds Study of Lattice Confinement Fusion
Posted on October 1, 2020
NASA returns to LENR as a fuel of the future or as they call it “lattice confinement” referring to the lattice structure formed by the atoms making up a piece of solid metal. The NASA group used samples of erbium and titanium for their experiments. Under high pressure, a sample was “loaded” with deuterium gas, an isotope of hydrogen with one proton and one neutron. The metal confines the deuterium nuclei, called deuterons, and excess energy is released via a fusion process.
More can be read here: https://spectrum.ieee.org/energywise/energy/nuclear/nuclear-fusiontokamak-not-included
Below is an informative interview from Tech Talks Daily Podcast which interviews Laurence Forsley, senior experimental physicist with NASA, research fellow at the University of Texas, and CTO of Global Energy Corporation
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Spacecraft of the Future Could Be Powered By Lattice Confinement Fusion
By Michael Koziol
Posted 05 Aug 2020 | 21:00 GMT A row of orange tinted powdery samples sitting in the bottom halves of a row of transparent cylinders. Photo: NASA Deuterons have been forced into the atomic lattice structures of these samples of erbium used in NASA's fusion experiments. Nuclear fusion is hard to do. It requires extremely high densities and pressures to force the nuclei of elements like hydrogen and helium to overcome their natural inclination to repel each other. On Earth, fusion experiments typically require large, expensive equipment to pull off.
But researchers at NASA’s Glenn Research Center have now demonstrated a method of inducing nuclear fusion without building a massive stellarator or tokamak. In fact, all they needed was a bit of metal, some hydrogen, and an electron accelerator.
The team believes that their method, called lattice confinement fusion, could be a potential new power source for deep space missions. They have published their results in two papers in Physical Review C.
“Lattice confinement” refers to the lattice structure formed by the atoms making up a piece of solid metal. The NASA group used samples of erbium and titanium for their experiments. Under high pressure, a sample was “loaded” with deuterium gas, an isotope of hydrogen with one proton and one neutron. The metal confines the deuterium nuclei, called deuterons, until it’s time for fusion.
“During the loading process, the metal lattice starts breaking apart in order to hold the deuterium gas,” says Theresa Benyo, an analytical physicist and nuclear diagnostics lead on the project. “The result is more like a powder.” At that point, the metal is ready for the next step: overcoming the mutual electrostatic repulsion between the positively-charged deuteron nuclei, the so-called Coulomb barrier.
Dr. Theresa Benyo documents the linear accelerator beam conditions during NASA’s lattice confinement fusion experiments while Jim Scheid and Larry Forsley discuss the beam stability data captured during the experiments. Photo: NASA Dr. Theresa Benyo documents beam conditions during NASA’s lattice confinement fusion experiments while Jim Scheid and Larry Forsley discuss the beam stability data. To overcome that barrier requires a sequence of particle collisions. First, an electron accelerator speeds up and slams electrons into a nearby target made of tungsten. The collision between beam and target creates high-energy photons, just like in a conventional X-ray machine. The photons are focused and directed into the deuteron-loaded erbium or titanium sample. When a photon hits a deuteron within the metal, it splits it apart into an energetic proton and neutron. Then the neutron collides with another deuteron, accelerating it.
At the end of this process of collisions and interactions, you’re left with a deuteron that’s moving with enough energy to overcome the Coulomb barrier and fuse with another deuteron in the lattice.
Key to this process is an effect called electron screening, or the shielding effect. Even with very energetic deuterons hurtling around, the Coulomb barrier can still be enough to prevent fusion. But the lattice helps again. “The electrons in the metal lattice form a screen around the stationary deuteron,” says Benyo. The electrons’ negative charge shields the energetic deuteron from the repulsive effects of the target deuteron’s positive charge until the nuclei are very close, maximizing the amount of energy that can be used to fuse.
Aside from deuteron-deuteron fusion, the NASA group found evidence of what are known as Oppenheimer-Phillips stripping reactions. Sometimes, rather than fusing with another deuteron, the energetic deuteron would collide with one of lattice’s metal atoms, either creating an isotope or converting the atom to a new element. The team found that both fusion and stripping reactions produced useable energy.
Larry Forsley examines a CR-39 particle detector used during NASA’s lattice confinement fusion experiments. Photo: NASA Bayarbadrakh Baramsai and Philip Ugorowski confer on the neutron spectroscopy system used to detect fusion neutrons. “What we did was not cold fusion,” says Lawrence Forsley, a senior lead experimental physicist for the project. Cold fusion, the idea that fusion can occur at relatively low energies in room-temperature materials, is viewed with skepticism by the vast majority of physicists. Forsley stresses this is hot fusion, but “We’ve come up with a new way of driving it.”
“Lattice confinement fusion initially has lower temperatures and pressures” than something like a tokamak, says Benyo. But “where the actual deuteron-deuteron fusion takes place is in these very hot, energetic locations.” Benyo says that when she would handle samples after an experiment, they were very warm. That warmth is partially from the fusion, but the energetic photons initiating the process also contribute heat.
There’s still plenty of research to be done by the NASA team. Now they’ve demonstrated nuclear fusion, the next step is to create reactions that are more efficient and more numerous. When two deuterons fuse, they create either a proton and tritium (a hydrogen atom with two neutrons), or helium-3 and a neutron. In the latter case, that extra neutron can start the process over again, allowing two more deuterons to fuse. The team plans to experiment with ways to coax more consistent and sustained reactions in the metal.
Benyo says that the ultimate goal is still to be able to power a deep-space mission with lattice confinement fusion. Power, space, and weight are all at a premium on a spacecraft, and this method of fusion offers a potentially reliable source for craft operating in places where solar panels may not be useable, for example. And of course, what works in space could be used on Earth.
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How about we get the fusion reactors working here on Earth, then we’ll worry about spacecraft engines.
“...lattice confinement fusion...”
This is not a new idea. This approach has been talked about for years.
“ says that when she would handle samples after an experiment, they were very warm.”
So, it’s lukewarm fusion on your desk in a lab.
Bkmk
They come right up to the edge of saying it but don’t.
“Lattice confinement fusion initially has lower temperatures and pressures” than something like a tokamak, says Benyo. But “where the actual deuteron-deuteron fusion takes place is in these very hot, energetic locations.”
Google filed several patents in this arena, and has a $10 million / year program. They got a peer reviewed article published in Nature. They call it Enhanced Coulomb Repulsion.
That’s their way of saying it’s cold fusion but they dare not call it that.
The reason plasma fusion is so hot is because trillions of fusion events take place. These guys are looking at thousands of fusion events.
Yup. Since 1989.
Www.lenr-canr.org
Do they use trilithium crystals?
Nope. Deuterium.
NASA is seeing neutrons. Next up will be dead grad students.
https://www.sciencedirect.com/science/article/abs/pii/S1572665721000503
Yup. cramming deuterium into platinum by electrochemistry is totally different from using pressure to cram deuterium into erbium and titanium!
I maintained back in the day that the deuterium in the platinum effectively lost its electrons in the sea on electrons that make up the structure of conductive metals like platinum.
That's pretty much what the article says for the erbium and titanium.
Maybe they will get a small example working, but when they build a full sized one ... Kaboom!
Now they're just getting to it. UGH!
Don’t give any of the stuff to Musk—he might blow up a city or two by mistake...
Trial and error is fine...until it involves nuclear stuff. :-)
Guessing that you are a Musk hater?
Some pretty dramatic results, some positive but most a bust on a very random basis.
In retrospect this was probably due to using catalysts that loaded with deuterium macroscopically on a consistent basis, but failed to interpenetrate into the proper lattice configuration except in a very infrequent and random fashion.
Seems properly engineering the incorporation of the deuterium into the optimum metallurgy to provide a consistent, properly structured lattice configuration that generates fusion could be the key.
It remains to be seen if there is a sweet spot were deuterium loading gives a high enough probability of proximate deuterium molecules to support sustained, controlled fusion without melt down or worse.
Good to see this is finally coming to fruition but glad I backed away as 32 years is a bit to long to see practical results and commercialization is still well into future.
FWIW, US DOE owns all patents for nuclear process technolgy
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