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!yYDPKpmz/I/x/40513485#40516623
6/12/2025, 10:02:09 AM
>>40516513
1. Torus or disc. Spherical or cylindrical could also work.
2. Aluminum, or, for a test apparatus, a small yttrium iron garnet sphere as a resonator, perhaps. The Q-factor has to be very good. 10^8 or 10^9 is what is realistically achievable with the best possible materials, but for this, I'd say even 10^11 to 10^15 may be preferable. Imagine a metamaterial that's basically a foam of little whispering gallery mode resonators. The net effect of all the tiny resonators could still produce a macro-scale meta-hopfion. Think of a big "soap bubble" produced by a phased array. It doesn't have to be a monolithic resonator.
3. Ideally, a gold or silver thin film. Graphene can host plasmons at THz frequencies. Aluminum could work, but the oxide layer would have to be accounted for. Zirconium nitride and hafnium nitride could also work. Ideally, whatever material you use would be sputtered onto the inside of the cavity wall as, basically, an atomically thin film, but there has to be a trick to this, like lining the inside with conductive foil of some kind (aluminized Kapton?). I don't think they're building UFOs by sputtering the entire interior. That would be very costly.
4. The target frequency almost certainly depends on the cavity size and geometry. Still no idea on the formula. Working on it.
5. It would be continuous RF output.
6. Air should do it, but helium, argon, xenon, vacuum, etc., are potentially even better. Superfluid helium, potentially even better still.
7. The magnon source has to be strong to produce proper spin waves. VERY strong. Think MRI magnets, (superconductors, etc.)
One very important thing to keep in mind is that these things are SHOCKINGLY DANGEROUS! As in, if the field collapses unexpectedly, you can get a magnet quench and lethal bremsstrahlung X-rays and maybe even gamma photons. If I built even a model test stand device, it would be operated by remote and housed in a radiation maze.
1. Torus or disc. Spherical or cylindrical could also work.
2. Aluminum, or, for a test apparatus, a small yttrium iron garnet sphere as a resonator, perhaps. The Q-factor has to be very good. 10^8 or 10^9 is what is realistically achievable with the best possible materials, but for this, I'd say even 10^11 to 10^15 may be preferable. Imagine a metamaterial that's basically a foam of little whispering gallery mode resonators. The net effect of all the tiny resonators could still produce a macro-scale meta-hopfion. Think of a big "soap bubble" produced by a phased array. It doesn't have to be a monolithic resonator.
3. Ideally, a gold or silver thin film. Graphene can host plasmons at THz frequencies. Aluminum could work, but the oxide layer would have to be accounted for. Zirconium nitride and hafnium nitride could also work. Ideally, whatever material you use would be sputtered onto the inside of the cavity wall as, basically, an atomically thin film, but there has to be a trick to this, like lining the inside with conductive foil of some kind (aluminized Kapton?). I don't think they're building UFOs by sputtering the entire interior. That would be very costly.
4. The target frequency almost certainly depends on the cavity size and geometry. Still no idea on the formula. Working on it.
5. It would be continuous RF output.
6. Air should do it, but helium, argon, xenon, vacuum, etc., are potentially even better. Superfluid helium, potentially even better still.
7. The magnon source has to be strong to produce proper spin waves. VERY strong. Think MRI magnets, (superconductors, etc.)
One very important thing to keep in mind is that these things are SHOCKINGLY DANGEROUS! As in, if the field collapses unexpectedly, you can get a magnet quench and lethal bremsstrahlung X-rays and maybe even gamma photons. If I built even a model test stand device, it would be operated by remote and housed in a radiation maze.
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