A photomultiplier high-voltage power supply incorporating a ceramic transformer driven by frequency modulation
A photomultiplier high-voltage power supply incorporating a ceramic transformer driven by frequency modulation
复制标题
一种采用频率调制驱动的陶瓷变压器的光电倍增管高压电源
DOI：
10.1109/23.682635
复制
发表时间：
1998
影响因子：
1.8
通讯作者：
H. Matsumoto
中科院分区：
文献类型：
--
作者：
M. Imori;T. Taniguchi;H. Matsumoto
本文介绍了一种用陶瓷Transformer代替传统磁性变压器的光电倍增管高压电源的电路和工作原理。陶瓷Transformer由陶瓷棒构成，利用压电效应产生高电压。由于不存在磁性材料，因此不会发生磁通量泄漏，使得电源可以在强磁场下操作。Transformer显示出急剧的谐振，之后电压放大取决于频率。Transformer输出通过利用频率依赖性的反馈来稳定，即，在整流之后，输出高电压被反馈到压控振荡器，该压控振荡器根据误差放大器的输出电压来调节振荡频率，该误差放大器将输出高电压与参考电压进行比较。该光电倍增管高压电源在20-M/spl Ω/;负载下提供1500至2500 V的高压，其中负载是光电倍增管的增殖器。当负载为20 M/spl Ω/时，电压纹波的幅度处于规定水平。涟漪大小与负载电流成正比。电压纹波限制光电倍增管的负载电流。
This paper describes the circuit and operation of a photomultiplier high-voltage power supply incorporating a ceramic transformer instead of a conventional magnetic one. The ceramic transformer, being constructed from a ceramic bar, utilizes the piezoelectric effect to generate high voltage. As no magnetic material is present, no leakage of magnetic flux occurs such that the power supply can be operated under a strong magnetic field. The transformer shows a sharp resonance, after which voltage amplification is dependent on frequency. Transformer output is stabilized by feedback utilizing frequency dependence, i.e., after rectification, the output high voltage is fed back to a voltage-controlled oscillator that adjusts the oscillation frequency according to the output voltage of an error amplifier that compares the output high voltage with a reference voltage. This photomultiplier high-voltage power supply provides high voltage from 1500 to 2500 V at a 20-M/spl Omega/; load, where the load is a breeder of the photomultiplier. The magnitude of voltage ripples is at a prescribed level when the load is 20 M/spl Omega/. Ripple magnitude is proportional to load current. Voltage ripples limit the load current to the photomultiplier.