Description
Kimball Physics offers a Yttria Coated Iridium Disc Cathode. In addition to being a ruggedized thermionic emitter that resists oxidation, these cathodes provide stable and uniform electron emission for a wide variety of electron source applications, especially where vacuum conditions are not ideal. The cathode structure of the ES-535, ES-526, and ES-529 consists of a yttrium oxide coated iridium disc that is heated by conduction from an iridium hairpin and mounted on an AEI or a Kimball Physics base. The ES-535W consists of a yttrium oxide coated iridium disc with tungsten hairpin in place of the iridium hairpin. Other bases are available on a custom basis.
- Chemically resistant
- Operating pressure < 10-4 torr for lr (Iridium) heater
- Operating pressure < 10-5 torr for W (Tungsten) heater
- Low work function
- Current densities up to 0.5 A/cm2
- Disc emission up to 10 mA
- 3 disc sizes (0.033″, 0.048″, 0.062″ diameters)
- On AEI (all Yttria Disc Cathodes) or compact CB-104 (ES-535W ) or CB-105 (ES-526, ES-529) bases
