jamesr wrote: I was thinking more that if the anode had a 10 to 20nm thick skin of something like carbon in some highly conductive configuration (eg graphene) then this would mitigate the surface vaporization and lessen the joule heating due to the large current flowing in the skin compared to beryllium.
I thought that with these very large currents the majority of the current flows on the outside of the electrode rather through the conductor anyway??
