mchargue wrote: OK. A muon ‘costs’ 140MEV.
The current process for creating muons is not efficient, and costs about 5GEV.
However, if there is some other nuclear process that produces muons less expensively – and I don’t know what that is – then it may be that the cost associated with muon production can be lower.
I have never heard about another process. May be some improvement is possible. But I do not sure that it would be on orders of magnitude as needed.
mchargue wrote: The idea would then be to use that other process to manufacture muons for less than 140MEV.
Technically achievable efficiency of accelerators does not exceed 35%.
140/0.35=400
Bellow 400 – impossible.
Neutron, X-material or some other reactants. In any case you should create particle and so, you should spend energy exceeding its rest energy.
selectivity of any nuclear process also not 100%