It would probably take less energy to turn the Moon into a mini Globus Cassus than to try and transmute the majority of its mass into transuranics.
I'm not sure, whether it is possible to create micro black holes by colliding hadrons with high enough energy, but let's asume, it can be done. Actually, while starting to use the LHC, iit was one topic of discussions.
It's not clear that there is a way to make these small black holes other than taking the black hole that results from the end of life of a sufficiently-large star and then waiting until enough of it has evaporated that it's moon-mass or smaller.
Even if you could create a micro black hole, it would almost instantly evaporate away very violently.
I have to wonder -- if we have the massive resources to do any of this, why not just build a new planet from scratch that has the properties we're looking for?
You can create a micro black hole if you concentrate enough laser energy into a small enough space. E=mc2. The black hole doesn't care what it's made from, just that the local energy density exceeds a critical amount, and photons aren't subject to the Pauli Exclusion. ("Kugelblitz black hole" if you're interested on googling it.) Once you've created an event horizon, you can then feed it any mass or energy in whatever form you wish. Including heat. BHs might be unlimited heat-sinks. (A la free energy machines.)
Quote from: Paul451 on 02/20/2020 05:05 pm[Kugelblitz black hole]It's mind boggling to imagine the laser setup you'd need to get enough photon energy into a small enough area to make that work.
[Kugelblitz black hole]
Quote from: jee_c2 on 02/20/2020 07:11 amI'm not sure, whether it is possible to create micro black holes by colliding hadrons with high enough energy, but let's asume, it can be done. Actually, while starting to use the LHC, iit was one topic of discussions.Even if you could create a micro black hole, it would almost instantly evaporate away very violently.https://en.wikipedia.org/wiki/Micro_black_hole
... The rarity of ultra-high energy collisions is also one of the reasons that physicists have not been able to confirm or disprove the formation of mini-black holes in this way. Still, this could change over the next few years, as the Pierre Auger Cosmic Ray Observatory in Argentina, which has just started taking data, becomes fully operational. ...
Quote from: ChrisWilson68 on 02/20/2020 05:22 pmQuote from: Paul451 on 02/20/2020 05:05 pm[Kugelblitz black hole]It's mind boggling to imagine the laser setup you'd need to get enough photon energy into a small enough area to make that work.Yeah, it's the kind of thing you save for when hydrogen fusion is no longer mass-efficient enough for your civilisation.
Quote from: ChrisWilson68 on 02/20/2020 11:27 amQuote from: jee_c2 on 02/20/2020 07:11 amI'm not sure, whether it is possible to create micro black holes by colliding hadrons with high enough energy, but let's asume, it can be done. Actually, while starting to use the LHC, iit was one topic of discussions.Even if you could create a micro black hole, it would almost instantly evaporate away very violently.https://en.wikipedia.org/wiki/Micro_black_holeOn the wiki link, describing the possible lowest mass of a black hole, there is a mention of 1016kg as the theoretical minimum.
I'm not sure, how this correlates with Kugelblitz blackhole mentioned by Paul451.
Also, there was some sentences about the LHC, and if that could produce micro black holes (because of the extra dimensions can reduce the needed energy level), which could be detected. I missed the part, where it was stated, that it actually happened (observed) or not. I do a quick search...
Found this:Quote... The rarity of ultra-high energy collisions is also one of the reasons that physicists have not been able to confirm or disprove the formation of mini-black holes in this way. Still, this could change over the next few years, as the Pierre Auger Cosmic Ray Observatory in Argentina, which has just started taking data, becomes fully operational. ...https://www.einstein-online.info/en/spotlight/accelerators_bh/Let's see.. there is a study about it: https://arxiv.org/pdf/1809.05089.pdfAnd there is another study on hypothetical stable micro black hole production at future 100 TeV collider: https://arxiv.org/pdf/1611.04949.pdfTBH these studies are too heavy weight for me, but reflecting on the fact, that this field is actively studied, and not considered as impossible.
If you have the atomic transmutation magic available to fiddle with the elemental composition of the Mon, then you are way, way, way, way^lots past the point where the Moon would be of interest. Rather work with one of the juicy moons of Jupiter or Saturn, where you have a much better foundation to build on.Or even planets of nearby stars. The energy used to nucleiform a whole moon is MUCH better used to fly your starship to a better planet, even if you have to cross a few lightyears to do so.