Cs(+) ion microsource
The design and operation of a novel Cs(+) ion source are described. This consists of a heated tantalum capillary connected to a heatable reservoir containing metallic cesium. Cs vapor streaming from the reservoir through the capillary is surface ionized at its inner wall. The ions emerging from the tip of the capillary are accelerated by a strong electric field between the tip and an acceleration electrode having a central bore. The virtual size of the source is about 10um in diameter. The source delivered a total current of 30 1.0 E-6 A into a solid angle of approx. 0.5 sr over a period of six weeks of uninterrupted operation on a charge of 0.5 g of metallic caesium.
Bibliographic Reference: Article: Rev. Sci. Instrum., Vol. 59 (1988), No. 10, pp. 2174-2176
Record Number: 198910184 / Last updated on: 1994-12-01
Original language: en
Available languages: en