SU112084A1 - Device for automatic registration of changes in the intensity of radioactive cosmic or other radiation - Google Patents

Description

In a number of cases, it is necessary to record small deviations from a given level of intensity of radioactive and cosmic radiation (or the frequency of randomly arriving pulses). Conventional frequency meters and devices with an accumulation of pulses on an RC circuit with r; due to discrimination and discrimination, due to the inevitable instability of parts, lamps and reference voltages, cannot provide accuracy above a few percent, and also have low long-term stability. Meanwhile, in some cases much higher accuracy and reliability of such devices is required, as well as a short response time.

The proposed device for automatic recording of intensity of radioactive, cosmic, or other radiation intensity 1Y is based on a comparison of the frequency of the pulses of the detected radiation with the frequency of the pulses of the reference generator.

The device differs from the known devices of this kind in the use in it of an annular reversible counter designed for discrete counting of pulses of measured and reference radiation and having countdown circuits open at one starting point.

The drawing shows a diagram of the proposed device.

The compared pulses are nodded to two separate inputs — forward (+) and reverse (-) counts of the ring reversing counter: 1kN. The counter operates on lamps (O, 1, 2 ... n - 1, n, B: cold cathode, the mode of which is stabilized by the initial quiet discharge. Only one lamp can be lit in the counter (due to which the meter consumes very low power). The next input impulse, 1yz zazyzagg triggering or the next but more or less lamiye of the ring. -1this before: ld 1dej lalgpy depending on which input - direct or number 112084

military account - he will do. The sequence of operation of the lamps is provided by the detectors D. The number of the illuminated lamp indicates the difference in the number of pulses received at both inputs. To reduce the capacity of the meter, both of its inputs can be switched on after scaling schemes, also working on them with cold cathode tubes. The reverse counting ring after zero lamia 0. Consequently, with normal radiation intensity, a slightly lower frequency of the reference oscillator, the counter returns to its initial state, since it reduces its readings only until the zero lamp 0 is triggered. change this level, which ensures high stability of the threshold and constancy of the sensitivity of the proposed system to an increase in intensity.

With an increase in the intensity of the radiation more than the preset one, all the lamps of the reversible counter operate successively and finally the output lamp B.

The trigger threshold of the entire system can be adjusted by changing the frequency of the reference oscillator. By varying the capacity of the reversible counter, it is possible to regulate the statistical accuracy and response time over a wide range.

If the reference generator is connected to the input not of the reverse (-), but of the direct count (- b), then the system will operate when the monitored intensity decreases below the reference frequency.

By registering the system response time after resetting the counter to zero, you can determine the percentage increase in intensity relative to the frequency of the reference oscillator.

A similar method of comparing the number of pulses from two installations using a reversible counter can also be used to continuously monitor the health of single-type pulse devices.

Subject invention

A device for automatically recording changes in the intensity of radioactive, cosmic or other radiation by comparing the frequency of the pulses of the detected radiation with the frequency of the pulses of the reference oscillator, is distinguished by the fact that, in order to increase the recording accuracy, it uses a ring reversing counter for discrete counting of the pulses being recorded and the reference radiation, whose countdown circuit is open at one starting point.