Is it legal to build a garage accelerator for hobby research

[kiwaho]

I wish build or buy an used particle accelerator in my garage or basement, 10MeV capacity is enough.
Is that legal?
Many counties no regulation on this matter, I guess.

 

[mfb]

It depends on the country you live in, probably not, but we cannot give legal advice here.

It is a bad idea even if it is legal.