Treatment method for excessive antimony in sodium-antimony co-evaporation during manufacturing of super-second-generation polyalkali photocathode

• Main Authors: SONG QIGENG, CUI WANBING, FU BING, ZHONG ZIYUAN, YANG JINBANG, DAO LICHUN, GAO BINGXIANG, CHEN KUNYANG, FANG JIANCUI, ZENG JINNENG, CHEN YANFEI, LIU YONG, ZHANG YANYUN, LI JINSHA, LI DONGZE
• Format: Patent
• Language: Chinese; English
• Published: 05.01.2024
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CRYSTAL GROWTH; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

The invention discloses a method for processing excessive antimony in sodium-antimony co-evaporation during manufacturing of a super second-generation polyalkali photocathode, which comprises the following steps of: detecting light current in a manufacturing process, if the light current is lower than 1500nA, judging that the antimony is excessive during sodium-antimony co-evaporation of a substrate layer, and performing the following processing: switching on a sodium evaporation power supply, and adjusting the sodium evaporation current to an initial value; gradually increasing the sodium evaporation current according to the rate of 400mA/min, and stopping increasing the sodium evaporation current and keeping the current sodium evaporation current when detecting that the light current is increased or decreased; turning on an antimony evaporation power supply after one minute; adjusting the antimony evaporation current to an initial value, and progressively increasing the antimony evaporation current at a rat