公开(公告)号：US3884539A

公开(公告)日：1975-05-20

申请号：US44793674

申请日：1974-03-04

Applicant: RCA CORP

Inventor： SOMMER ALFRED HERMANN

IPC: H01J9/12 ,  H01J9/38

CPC classification number: H01J9/125 ,  H01J2201/32

Abstract: An S-20 response multialkali photocathode is produced by exposing a layer of antimony to activating vapors of potassium, sodium, and cesium. In one method the antimony layer is exposed to cesium at a temperature of about 240*C. prior to exposure to potassium or sodium, and the exposing to cesium is terminated before the photosensitivity reaches a peak. In another method, the antimony layer is exposed to cesium at a temperature of about 240*C. subsequent to exposure to potassium and sodium, and the exposing to cesium is terminated when the photosensitivity reaches a peak.

公开(公告)号：US3858955A

公开(公告)日：1975-01-07

申请号：US32374673

申请日：1973-01-15

Applicant: RCA CORP

Inventor： SOMMER ALFRED HERMANN

IPC: H01J9/02 ,  H01J9/12 ,  H01J43/20 ,  H01J9/18

CPC classification number: H01J9/12 ,  H01J43/20 ,  H01J2201/32 ,  H01J2201/34

Abstract: A III-V compound cathode is produced by exposing the cathode to cesium or cesium and oxygen, then exposing it to an increasing concentration of cesium while heating to about 150*C. The cathode is maintained at about 150*C, then exposed to a decreasing concentration of cesium while cooling. Also disclosed is an electron-emissive tube containing a cesium buffer source of a material incompletely reacted with cesium. The buffer source provides the increasing and decreasing concentrations of cesium for the above heating step.

Abstract translation: 通过将阴极暴露于铯或铯和氧，然后在加热至约150℃的同时将其暴露于浓度增加的铯来制备III-V复合阴极。将阴极保持在约150℃，然后暴露于 降低铯浓度降低。