| 摘要 |
PURPOSE: To provide a DC high voltage supply system which does not produce adverse influence on the sensitivity of a radiation detector or a neutron sensor. CONSTITUTION: A small resistor 7a, a load choke 6 for a sensor high voltage power source and a small resistor 7b sequentially connected in series are provided between respective connecting points of a DC high voltage power source, a signal transmission coaxial cable 111 and a preamplifier 1. The entire resistance including the choke resistor is so selected to be small as not to generate a voltage drop and the inductance of the choke 6 is so selected to be large as not to vary the amplitude-frequency characteristics of the preamplifier 1. In order to measure a DC current, the voltage drop of the resistor 7a can be measured.
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