JPS5819496Y2 - High energy charged particle detection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cosmic ray detection device that is mounted on an artificial satellite and detects high-energy charged particles such as proton rays and alpha rays in outer space.

In order to analyze the distribution of cosmic rays from the measurement site, a cosmic ray detection device mounted on an artificial satellite must have a clear radiation incidence aperture angle and allow as many cosmic rays as possible to enter. In order to reduce the statistical error of the data, it is necessary to increase the value of this entrance aperture angle, and
It is desirable to reduce the degree of damage to semiconductor detectors from radiation through long-term cosmic ray observations.

Conventionally, this type of cosmic ray detection device, as shown in the configuration diagram in FIG.
A radiation entrance aperture (hereinafter referred to as the aperture) 2 having a
A radiation detector 3 made of a material such as a silicon semiconductor has a radiation shielding part for removing unnecessary radiation, and has signal pulse output terminal electrodes 4 and 5 close to the inside of the entrance aperture 2a. A current pulse is generated in the detector 3 every time one radiation enters the detector 3 through the entrance aperture 2a, and this is amplified by an amplifier connected in series to the detector 3. By counting, the number of incident cosmic rays is determined.

In the configuration shown in Fig. 1, the entrance aperture angle θ is small, and in order to prevent radiation damage to the detector 3 due to high-density cosmic ray incidence, the diameter of the entrance aperture 2a can be made small; The disadvantage is that the number of cosmic rays that emit is significantly reduced.

For this reason, an opening 8 having a structure as shown in FIG. 2 is generally used.

This structure attempts to capture as many incident cosmic rays as possible by increasing the incident aperture angle θ of the aperture.

However, this cosmic ray detection device with the configuration shown in Figure 2 has the disadvantage that the radiation to be detected is concentrated in the part 3a of the detector, so the damage caused by the radiation of the detector 3 is still large. .

The purpose of the present invention is to improve the above-mentioned drawbacks, to provide a detector that can capture as much radiation as possible and minimize damage to the detector due to radiation.

The embodiment of the present invention will be explained with reference to FIG. 3.

In the configuration diagram of FIG. 3, the tip of the radiation entrance side of the entrance aperture 9a is set at an acute angle, and the entrance aperture angle θ and the diameter of the entrance aperture 9a are set to be the same as the cosmic ray detector configured as shown in FIG. The radiation incident side should be narrow and the detection surface side should be wide.

In this way, as in the case of the configuration shown in FIG. 2, it is possible to capture a large number of radiations, and on the other hand, since the range 3a where radiation enters the detector 3 becomes wider, the incident plane The radiation density of the detector is reduced, and the loss caused by the radiation of the detector is reduced.

That is, radiation incident from multiple directions can be captured, and at this time, the radiation from each direction is dispersed on the detection surface 3a of the detector 3.

Therefore, the radiation irradiation density to the detection surface 3a becomes low,
Therefore, a large amount of radiation can be captured without damaging the detector 3.

This has the advantage of allowing the use of cosmic ray detectors, for example in high-density radiation belts.

Although the present invention is aimed at a cosmic ray detection device mounted on a satellite in a high-density radiation belt, it is clear that it can also be applied to general radiation measurements on the ground.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional cosmic ray detection device, Fig. 2 is a block diagram of a commonly used cosmic ray detection device having an opening, and Fig. 3 is a block diagram of a cosmic ray detection device having an opening according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a cosmic ray detection device. In the figure, 1...radiation shield, 2...
・・Conventional entrance aperture, 2a ・・・・Incidence aperture, 3
...Radiation detector, 3a...Radiation effective incidence surface, 4, 5...Terminal electrode, 6...
・Amplifier, 7... Counter, 8... General entrance aperture, 8a... Doujinshi aperture, 9...
...Incidence aperture according to the present invention, 9a... Coincidence aperture, A... Vertical incidence direction of radiation, B...
...Maximum oblique incidence direction of radiation, θ...A above. is the aperture angle formed by A.

Claims (1)

[Scope of utility model registration request] It has a detection element for detecting charged particles, and a shield provided in front of the detection element and having an entrance aperture through which the charged particles pass, and the tip of the entrance aperture on the charged particle entrance side is at an acute angle, and A high-energy charged particle detection device configured such that the charged particle incident side is narrow and the detection element side is wide.