NEA (Negative electron affinity)photocathodes are prepared by evaporation techniques. Two possibilities are discussed in the article: A) to improve the technological standard of existing and prepare NEA photoca-thodes.

• 用蒸发法制备负电子亲和势(NEA)光电阴极,探讨了两个可能性:(一)改进现有多碱阴极的工艺规范,制备负电子亲和势光电阴极。