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We put forward a new type impregnated dispenser cathode, which impregnates the active salt of BaO/SrO/Sc2O3. At 1100UB, the pulse current density of the cathode is up to 86.2A/cm2, 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 Sc2O3 and SrO is the main reason that the new cathode has excellent emission performance.
To meet the demand of terahertz devices, we develop a new type impregnated dispenser cathode. This cathode is impregnated with an active substance with molar ratio of . We test its emission performance, practical work function distribution, and surface composition, and analyze the mechanism of...
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