SU114458A1 - Beta, gamma and other ionizing radiation scintillation spectrograph - Google Patents

Description

Scintillation spectrographs are known -. and other ionizing radiation containing a scintillation counter, sampler, a memory storing information about the amplitude distribution of pulses and an indicator.

The proposed scintillation spectrograph, in comparison with the known ones, has a simpler design and makes it possible to continuously obtain a curve for the entire spectrum of the investigated radiation.

A distinctive feature of the proposed spectrograph is that an electron beam tube with a long afterglow is used as a memory device, amplified and rectangular pulses of a scintillation counter are applied to the horizontal deflecting plates, sinusoidal voltage is applied to the vertical deflecting plates. high frequency, and the modulator through the delay line is the impulse of the beam illumination in such a way that the beam illumination occurs at the moments of its stopping at the maximum amplitude voltage rectangular pulse.

The spectrograph uses a transmitting television tube or a mirror-mechanical | Skye sweep device with a photomultiplier, as well as an oscilloscope, one pair of deflecting plates of which is connected to the transmitting television tube, and the second pair - with a line generator of a television tube or a mirror-mechanical scanner.

FIG. Figure 1 shows the scheme of the proposed scintillation spectrograph with a transmitting television tube; in fig. 2 - the same, with a mirror-mechanical scanning device with a photomultiplier.

No. 114458

The scintillation spectrograph is equipped with a tube / visual observation of the radiation spectrum and allows visual and photographic recording of the shape of the 3-, - and other types of ionizing radiation.

The spectrograph contains a scintillation counter 2, a wideband amplifier (not shown) and a storage device 3 (with lens 7), which accumulates information on the amplitude distribution of pulses from the counter on the screen phosphor of a cathode ray tube with a long afterglow.

The device has a parallel reading device that converts the luminance information of the storage tube into a graphical representation of the curve of the -. Ionizing radiation spectrum from the radiation source 6. This device can be made in two versions: either as transmissions of a television tube 4 or with a mirror-mechanical scan 5 with a photomultiplier .

Electrical impulses from counter 2, the amplitude of which is linearly proportional to the quantum energy or radiation particles, are amplified and fed to the forming unit.

In the forming cascade, a pointed electric pulse through the diode is charged to a peak amplitude value, which, after 0.5-1 µ sec, is sharply discharged through a one-shot made on a double triode. As a result, the peaked pulses are converted into rectangular pulses of the same amplitude. These pulses are amplified by a linear amplifier and fed to the horizontal deflection plates of the memory tube 3, and the beam is illuminated to the modulator through the delay line. The duration and delay time are selected in such a way that the illumination of the beam occurs at the moment it stops at the maximum value of the amplitude of the voltage of a rectangular pulse applied to the plates.

A sinusoidal high frequency voltage of the order of 6 MHz is continuously applied to the vertical deflection plates. As a result of the simultaneous action of horizontal, vertical plates and a voltage modulator of the specified form, a luminous vertical bar appears on the phosphor. The horizontal distance of this crystal from the zero point of the beam is proportional to the amplitude of the electric pulse from the counter and characterizes the energy of a quantum or particle of radiation.

Upon receipt of a continuous amplitude spectrum of pulses over a period of time comparable to the duration of the afterglow of the screen of the memory tube, a large number of vertical strokes are merged. a light arises with a horizontal band, and the distribution of the luminance of the glow over its length characterizes the energy spectrum of the radiation.

Reading and converting of the luminance information in the image of the spectrum curve is carried out with the help of a reading device, which is performed in two versions.

According to the first embodiment, the light strip from the strip is projected onto the photo cascade of a super-ortho or television tube 4, and the video signal is fed to the vertical input of an oscilloscope synchronized with

superorticon line generator. In the second embodiment, the bandwidth is deployed by mirror-mechanical scan 5, and the video signal is also fed to the vertical input of the oscilloscope synchronized with the scan.

Subject invention

Claims (3)

1. Scintillation spectrograph of 3-, f- and other ionizing radiation, with visual and photographic recording of the shape of the curve of the spectrum of ionizing radiation, containing a scintillation counter, amplifier, memory, accumulating information about the amplitude distribution of pulses, and an indicator, characterized in that , in order to continuously obtain the curve of the whole spectrum of the investigated radiation and simplify the design of the spectrograph, an electron beam tube was used as a storage device in the spectrograph a long afterglow, on the horizontal deflecting plates of which the amplified and rectangular pulses of the scintillation counter are fed, on the vertical deflecting plates - a sinusoidal high frequency voltage, and the PA modulator through the delay line - a pulse of the beam illumination in such a way that the backlight The beam occurred at the time of its stopping at the maximum value of the amplitude of the voltage of a rectangular pulse. 2. Sci-til spectrograph according to claim 1, characterized in that, for the purpose of reading and converting the acoustic characteristics of the spectrum on the cathode-ray tube screen into an electrical signal, a transmitting leviziopapp tube or a mirror-mechanical scanning device with a photomultiplier is used in the spectrograph. 3. Scintillation spectrograph according to claims. 1 and 2, characterized in that, in order to visually observe the spectrum curve or to photograph it, an oscilloscope is used in the spectrograph, one pair of deflecting plates of which is connected to a transmitting television tube, and the second pair to a lower-case television tube generator; or mirror-mechanical sweepers to block : X reinforce / ha And ijcu / iume / iH) uj generators fucker