为避免产生光子并合现象的产生，可以利用在接收光路上加装中性衰减片、提高光电倍增管开始工作的高度和降低光电倍增管增益等措施来分段测量，提高臭氧测量的精度。
To avoid the phenomena of photon overlap, many measures such as neutral optical attenuator, gate witch and reducing the gain of PMT, are taken to enhance accuracy of ozone measurements.
实验比较了高计数率下三种光电倍增管电压供给方式的增益变化和温度效应。
The gain stabilities and temperature effects were experimentally for three different bias voltage supply modes to photomultipliers at high counting rates.
保持各个光电倍增管的增益一致性对正电子发射断层成像（PET）的质量至为重要。
To make all PMTs' gains identical through auto-adjustment is important for ensuring the PET imaging quality.
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