Analysis of stability requirements for high-voltage power supply of photomultiplier tubes

1、 Stability requirements

A photomultiplier tube is a device used to detect extremely weak light signals, and its sensitivity and accuracy directly depend on the stability of its power supply. Therefore, the stability requirement of the high-voltage power supply for photomultiplier tubes is very high, generally below 0.01%.

2、 Application scenarios and standards

The application scenarios of photomultiplier tube high-voltage power supply are very wide, usually used in scientific instruments, nuclear physics, medical imaging, aerospace and other fields. The power stability requirements may vary in different fields and application scenarios, but generally speaking, there are several standards:
1. The output voltage stability requirement is not higher than 0.01%
2. The correlation between output voltage and current should be controlled within 0.05~0.1%
3. The impact of long-term load changes on power output should be less than 0.1%
4. The frequency response should be flat, with a drift of no more than 1% in the range of 0-10kHz
5. The working temperature range should be wide, usually between -20 ° C and 50 ° C

3、 Adjustment methods and suggestions

To ensure the stability of the high-voltage power supply for photomultiplier tubes, the following adjustment methods and suggestions can be adopted:
1. Choose high-quality components and component suppliers
2. Design reasonable feedback circuits and voltage control circuits
3. Add voltage regulators and filtering devices to reduce noise and electromagnetic interference
4. Implement strict quality control and testing processes to eliminate fault factors as much as possible

4、 Summary

The high-voltage power supply of photomultiplier tubes is a widely used electronic device with very high stability requirements. In different application scenarios, the stability requirements and standards may also vary, and adjustments and settings need to be made according to specific circumstances. By adopting practical adjustment methods and suggestions, the stability and reliability of the power supply can be ensured, and the efficiency and accuracy of the photomultiplier tube can be improved.