实验结果表明，由于光子计数器的核心器件光电倍增管及其高压电源不很稳定，光子计数器需要经常校验和标定。

Experimental results shows that the core device of the photon counter-PMT and it's high voltage power supply is not stable, the photon counter can be test and calibrated frequently.

youdao

实验结果表明，由于光子计数器的核心器件光电倍增管及其高压电源不很稳定，光子计数器需要经常校验和标定。

Experimental results shows that the core device of the photon counter-PMT and it's high voltage power supply is not stable, the photon counter can be test and calibrated frequently.

youdao