| 摘要 |
<p>A photomultiplier detector protection system and method utilizing a negative feedback loop to maintain the photomultiplier detector output below a predetermined output. The feedback loop comprises a comparator (38) reponsive to the photomultiplier detector (14) output and also responsive to a predetermined limit signal. The comparator output is applied to a summing amplifier (60) which also receives a voltage adjust signal. The output of the summing amplifier (60) controls the output of a power supply (12) which is in turn applied to the photomultiplier detector (14).</p> |
