the Thermionic Vacuum Arc (TVA) method. The Be marker layer must be adherent to the
substrate and compact to resemble bulk beryllium. Thermionic Vacuum Arc (TVA) is an
externally heated cathode arc which can be established in high vacuum condition, in vapors
of the anode material. The arc is ignited between a heated cathode provided with a Whenelt
cylinder and the anode which is a crucible containing the material to be evaporated [1]. We …