| 摘要 |
PURPOSE:To measure weak radiation or radiation of low energy excellently by forming ionized charge flux which is accelerated with a cathode and an anode, and detecting the magnetic flux generated by the ionized charge flux. CONSTITUTION:A cathode 36 and an anode 38 are supported with insulating posts 40 with an interval of about 5-20cm being provided. For example, a voltage of 1,000V is applied across the electrodes. The voltage is set based on the interval between the cathode 36 and the anode 38 and the kind of a gas when the detector is placed in an gaseous atmosphere. Then, ionized charge is accelerated and amplified by the high voltage. The ionized charge flux which flows from the cathode 36 to the anode 38 as shown by a numeral 100 in the figure is formed. The ionized charge generated by radiation is not measured as electric pulses as in a conventional device, but the ionized charge flux is formed and the ring-shaped magnetic flux generated by the ionized charge flux is detected. Thus, the amount of radiation or exo-electrons can be measured.
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