| 摘要 |
PURPOSE:To enable correction of sensitivity by a simple electronic circuit, by a method wherein, in the case of a time tn-1=tn-DELTAt before a time, using only sensitivity Sn-1 and neutron flux PHIn-1, sensitivity Sn at the time t=tn is found at intervals DELTAt of a constant time. CONSTITUTION:After the output current of a self-output type neutron detector 1 is amplified by a current amplifier 2, it is supplied to an analogue/digital convertor (A/D convertor). After a time DELTAt has elapsed (or at tt-1=tn-DELTAt), a signal is generated at the A/D convertor 3 from a timer 6, and the A/D convertor 3 converts an input voltage, proportioning a current neutron detecting signal current, into a digital signal by means of the signal. At the time tn-1=tn-DELTAt, using only sensitivity Sn-1 and a neutron flux PHIn-1, sensitivity Sn at a time t=tn is found at intervals DELTAt of a constant time, and this permits the correction of sensitivity by means of a simple constitution. |
