Product Overview
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Kimball Physics emitters provide a reliable source of electrons or ions for use in a variety of instruments including scanning electron microscopes (SEM) , transmission electron microscopes (TEM), probes, electron lithography systems, free electron lasers, as well as Kimball Physics electron and ion guns. Many cathodes are resistively-heated, thermionic electron sources. Careful designs and detailed thermal analysis provide products with high stability and low operating power. |
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| Precision microflat emitting surface | |
| Kimball Physics offers refractory metal, oxide, and single crystal cathodes: Tantalum (Ta) disc cathodes, Tungsten (W) filaments, Barium Oxide (BaO) coated disc cathodes, Yttria (Y2O3) coated iridium disc cathodes, and high-brightness single-crystal Lanthanum Hexaboride (LaB6). Cathodes are available mounted on a standard AEI base, or the more compact Kimball Physics (CB-104) base, or on a variety of bases for electron microscopes. Cathodes may also be mounted on customer-supplied bases. Most bases are high tolerance ceramic: pins are usually kovar, but may also be available in molybdenum (for field-free regions). |  |
| LaB6 cathode on a standard ceramic AEI base | |
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Firing units containing the appropriate cathode or ion source are available for all mounted Kimball Physics units (when ordering, specify by electron or ion gun model and any special options, such as high current or small spot). For part numbers and prices see the Product Selection/Price Chart. For additional technical information on LaB6 and other cathodes, see Technical Information. It is not necessarily possible to achieve all maximum specifications simultaneously. Specifications subject to change without notice. |
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Oxide coated cathode on compact CB-104 base |
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LaB6 cone/ microflat single crystal |
Disc Cathodes |
LaB6 large planar single-crystals |
Filaments |