I am not talking about the pseudo-science of so called cold fusion I am interested in what temperature you can get away with to produce fusion reaction. I was thinking in terms of micro-fusion or at least at levels below the huge tokamaks being produced because obviously small scale devices couldn't handle millions of degrees of temperature. Or correct me if I am wrong please as I am no expert just a curious student!!
15 KeV is enough to assure that the plasma does not neutralize itself and the bare nuclei have a high enough statistical and quantum mechanical probability of interaction/fusion by overcoming the coulomb repulsion of two positive nuclei.
The temperatures necessary for the various fusion reactions:
This is in a nutshell the status for thermodynamic/plasma fusion.