| 摘要 |
FIELD: physics.SUBSTANCE: device for correcting and stabilising the transfer constant of a scintillation detector for radioisotope devices for monitoring process parameters has a scintillator optically connected to a photomultiplier, a linear amplifier whose input is connected to the output of the photomultiplier, the output of the linear amplifier is connected in series to an extrapolator and an integrator, the output of the integrator is connected to the non-inverting input of a differential amplifier, the inverting input is connected to a reference voltage source, and the output of the differential amplifier is connected to the input of a controlled power supply of the photomultiplier, wherein the device further includes: a bidirectional counter, the countdown input of which is connected through a pulse former to the output of the linear amplifier; a pulse generator which is connected to the summation input of the bidirectional counter, and an electronic switch, the control input of which is connected through an interpolator to outputs of the bidirectional counter, and the output of the reference voltage source is connected through the electronic switch to the non-inverting input of the differential amplifier.EFFECT: high accuracy of measuring ionising radiations.1 dwg |
