Development of Gate Beam Hodoscope for High Intensity Beam Detection

(1)在大于1MHz的光脉冲下，观察到PM的增益变化。(2)最后2个节段的增压器比最后1个节段的增压器能更好地解决高速率光脉冲。(3)用两个间隔为1 ~ 2 nsec的光脉冲照射PM时，其增益不发生变化。(4)栅极与阴极之间有栅极的栅极型永磁在栅极开启时间内对高达10mhz的高速率光脉冲没有增益变化。

(1) Gain change of PM was observed for more than 1MHz light pulse.(2) It was found that booster on the 2nd last dynode gives better solution for high rate light pulse rather than on the last dynode.(3) It was found the gain change does not take place when the PM is irradiated with two light pulses having the interval of 1-2 nsec.(4) The gate type PM equited with a grid between a cathode and the first dynode gave no gain change for high rate light pulse up to 10 MHz during the gate opening time.