A new impregnated dispenser cathode

We put forward a new type impregnated dispenser cathode, which impregnates the active salt of BaO/SrO/Sc
2
O
3
. At 1100U
B
, the pulse current density of the cathode is up to 86.2A/cm
²
, 2.7 times of the value of a traditional M-type cathode. It is proposed that, the emission of pores and pore edges caused by Sc
2
O
3
and SrO is the main reason that the new cathode has excellent emission performance.