DEVICE FOR REGISTRATION OF IONISING RADIATIONS Russian patent published in 2009 - IPC G01T1/40 

FIELD: physics, measurement.

SUBSTANCE: invention is related to the field of metering equipment, namely to measurement of ionising radiations with the help of scintillation detector, and may be used to stabilise sensitivity of scintillation detector in the area of ionising radiations spectrometry (α, β, γ, n). For radiation monitors of nuclear materials (NM) and/or radioactive substances (RS). Device for registration of ionising radiation comprises scintillator 2, joined with photoelectronic multiplier 3, outlet of which is connected to amplifier 4, and microprocessor 11, the first outlet of which is connected via current pulse generator 12 to light diode 13, and the second outlet is connected to the first inlet of comparison circuit 10, and inlet - to temperature detector, light diode 13 is joined with scintillator 2, and lower level discriminator 5 is connected between outlet of amplifier 4 and inlet of analog-digital converter 6, outlet of which is connected to inlets of the first and second switch, control inlet of the second switch 8 is connected to the fourth outlet of microprocessor 11, the third outlet of which is connected to the second inlet of current pulse generator 12, the first outlet of microprocessor 11 is connected to control inlet of the first switch 7, outlet of which via the first integrator 9 is connected to the second inlet of comparison circuit 10, outlet of which via high-voltage power supply source 15 and the second integrator 16 is connected to electrodes of photoelectronic multiplier 3, besides length of light diode radiation wave is less then wave of scintillator luminescence, blue light filter is installed between light diode and scintillator, switches are controlled by microprocessor 11 in antiphase in process of registration of ionising radiation or synchronously in performance of maintenance of device, time constant of the second integrator 16 integration exceeds time constant of the first integrator 9, and microprocessor 11 compensates temperature dependence of light outlet of light diode 13 via current pulse generator 12.

EFFECT: stabilisation of sensitivity in all operational conditions for the whole service life (in case of ageing and operation of scintillator and photoelectronic device).

6 cl, 4 dwg