一、圆笼式光电倍增管的结构特点 圆笼式光电倍增管的外径为34mm,总长为 94 mm,形如圆鸟笼,具有侧面光窗,其阴极有效尺寸为 8×24 mm.采用圆环式聚焦和倍增系统,并配有带11脚胶木管座,管子的外形如图1所示.由于整管设计十分正确合理,具有一系列优点,因此目前我国和美国、英国、 First, the structural characteristics of a round-cage photomultiplier tube Cage photomultiplier tube outer diameter of 34mm, a total length of 94mm, shaped like a round bird cage, with a side window, the cathode effective size of 8 × 24mm. Ring focusing and multiplying system and is equipped with 11-pin bakelite seat, the shape of the pipe shown in Figure 1. Because the entire pipe design is very accurate and reasonable, with a series of advantages, so at present China and the United States, Britain,