what is the physics behind the operation of these switches?
There is "International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)"
http://isdeiv.lbl.gov/
http://www.ivsnet.org/isdeiv/ISDEIV-2014/
It contains, in particular, topics on
B1.Switching in vacuum and related phenomena
C1.Vacuum interrupters and their applications
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