Development of High Cost-performance High-voltage Supply/Monitor/Control for Imaging Detector

在宇宙线研究领域，利用成像探测器进行观测的方法已经取得了重大进展。在宇宙线研究项目的许多情况下，他们在光学系统焦平面上的成像相机设备中安装光电倍增器阵列(PMT)作为基本组件。在这些情况下，他们需要为每个摄像头中的数百个PMT供电和分配高压，以保持摄像头增益的均匀和稳定。高压电源的稳定性对宇宙线初级能量的测定精度有很大影响。如果他以在线的方式对每个供电电压进行监测，并反馈结果以稳定每个PMT的总增益，就可以解决这个问题。性价比也很重要，因为供应渠道也很多。为了满足上述基本要求，我们在本次开发研究之初确定了高压电源/监控系统的目标如下：输出电压动态范围：0~1100V设置分辨率：小于1V监控分辨率：小于1Vmax。电源电流给PMT：0.5MARIPPLE P-P 1OmV批量生产成本：3000日元/℃我们进行了研发，取得的成果如下：非线性：&lt；0.6V(用于设置和监控)电压偏移逐通道偏差&lt；0.12V温度依赖&lt；0.01V/OMV此外，我们还认识到，目前批量生产成本估计为3800日元/ch，包括高压电源、配电、监控和控制系统。我们可以得出结论，在性能和成本方面，最初设定的目标已经几乎完美地实现了。

There has been a significant progress on observation method using imaging detector in the field of cosmic ray research. In may cases of cosmic ray research projects, they install an array matrix of photo-multipliers (PMTs) in their imaging camera devices on the focus plane of the potical system as basic components. In these cases, they need to supply and distribute high-voltage onto hundreds of PMTs in each camera in order to keep the gain of camera uniform and stable. The stability of high-voltage supply can contribute to the determination precision of primary energies of cosmic rays. One can solve the problem if he keeps monitoring each supplied voltage in an online way and feedback the results to stabilize the total gain of each PMT. The cost-performance is important because of the large number of supply channels too. To fulfill the above basic requirements, we determine the goals of our high-voltage power supply/monitor/control system at the beginning of this development studies as follows:Output voltage dynamic range: 0〜1100VSetting resolution: Less than 1VMonitoring resolution: Less than 1VMax. supply current to PMT: 0.5 mARipple P-P 1OmVMass production cost: 3000yen/chWe have done the R＆D and the achievements are listed as follows:Non-linearity: <0.6V (Boss for setting and monitoring)Voltage offset ch-by-ch deviation <0.12VTemperature dependence <0.01 V/℃Further more, we have recognized that the present mass production cost estimate is 3,800yen/ch totally including high-voltage supplies, distribution, monitor, and control systems. We can conclude that the goals set at the beginning has been almost perfectly achieved on the performance and cost aspects.