CN215910649U

CN215910649U - High-sensitivity geiger counter probe

Info

Publication number: CN215910649U
Application number: CN202121940333.4U
Authority: CN
Inventors: 潘同华; 史建科
Original assignee: Shandong Zhongfu Nuclear Safety Technology Co ltd
Current assignee: Shandong Zhongfu Nuclear Safety Technology Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-02-25
Anticipated expiration: 2031-08-18

Abstract

The utility model relates to a high-sensitivity Geiger counter probe, belonging to the field of nuclear radiation detection; the Geiger counter probe is convenient to process and high in sensitivity; the technical scheme is as follows: a high sensitivity geiger counter probe comprising: a metal tube and an anode wire; the ionization space is formed by sealing two ends of the metal tube, one end of the anode wire is fixed in the ionization space, the other end of the anode wire is fixed outside the ionization space, the metal tube and the anode wire are insulated, the anode wire and one end of the metal tube are blocked and contacted, the anode wire and the metal tube are of a hollow structure, and the ionization space is completely sealed.

Description

High-sensitivity geiger counter probe

Technical Field

The utility model discloses a high-sensitivity Geiger counter probe, and belongs to the field of nuclear radiation detection.

Background

The geiger-miller counter is a counter instrument that detects the intensity of ionizing radiation (alpha particles, beta particles, gamma rays, and X-rays) specifically. When the voltage applied to the probe reaches a certain range, the ray can generate a pair of ions in the tube by ionization, and an electric pulse with the same size can be amplified and generated and recorded by an electronic device connected with the electric pulse, thereby measuring the number of rays in unit time.

For a small Geiger-Miller counter, the probe is small in structure and complex in process. The production process of the probe is characterized in that an anode wire is fixed in an outer tube or a small chamber, two through holes are formed in the outer tube or the small chamber, one through hole is used for air intake, and the other through hole is used for air intake; when the gas replacement is completed, sealing is performed with molten glass.

The glass sealing has the advantages of good sealing effect, stable sealing effect, small influence from the outside, and no change of gas components in the outer tube or the small chamber caused by aging of sealing materials.

However, there are the following problems:

1. the probe has complex processing process and high requirement on the proficiency of production technicians, and gas exchange is easily caused in the glass sealing process, so that the gas proportion is unstable, and the quality of the probe is low.

2. The probe has wide application range, large external temperature range and different cold and hot expansion coefficients between the anode wire and the glass plug, so that cracks are formed between the anode wire and the glass plug. To prevent this problem, the diameter of the anode wire is typically below 1mm, and the surface area of the anode wire is relatively small, resulting in a low probe sensitivity.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems, the utility model provides the geiger counter probe which is convenient to process and high in sensitivity.

In order to achieve the technical purpose, the technical scheme provided by the utility model is as follows:

a high sensitivity geiger counter probe comprising: a metal tube and an anode wire; the ionization space is formed by sealing two ends of the metal tube, one end of the anode wire is fixed in the ionization space, the other end of the anode wire is fixed outside the ionization space, the metal tube and the anode wire are insulated, the anode wire and one end of the metal tube are blocked and contacted, the anode wire and the metal tube are of a hollow structure, and the ionization space is completely sealed.

The metal tube both ends opening, metal tube one end adopts the shutoff to seal, the metal tube other end adopts the closing cap to seal.

The anode wire is of a tubular structure.

And the other end of the anode wire is sealed by a sealing cap.

The anode wire penetrates through the center of the plugging and is relatively fixed, and the anode wire is overlapped with the central shaft of the metal pipe.

The plug, the sealing cover and the sealing cap are all made of glass.

The outer diameter of the anode wire is 0.8-1.2 mm, and the inner diameter of the anode wire is 0.6-0.8 mm.

The anode wire is a gold-plated tungsten wire.

Compared with the prior art, the utility model has the following beneficial effects:

the anode wire adopts a hollow tube structure, and although the cold and heat coefficients between the anode wire and the glass plug are different, the deformation coefficient of the tube body structure is reduced relative to that of a rod-shaped structure; therefore, the outer diameter of the anode wire can be increased, the area of an electron avalanche region is increased, and the sensitivity of the probe is improved.

Secondly, the anode wire adopts a hollow tube structure and is matched with an opening at the other end of the metal tube, one end of the metal tube can be sealed by plugging molten glass in advance, then air is supplied through the anode wire, the other end of the metal tube is exhausted to form gas replacement, finally the other end of the metal tube is sealed by a sealing cover, and the anode wire is sealed by a sealing cap; the method has the advantages of convenient and quick operation and the proportion of the gas in the metal tube close to an ideal value, and further improves the precision of the probe.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic cross-sectional view of the present invention.

In the figure: 1 is a metal tube, 2 is an anode wire, 3 is an ionization space, 4 is a plug, 5 is a sealing cover, and 6 is a sealing cap.

Detailed Description

For a further understanding of the utility model, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples:

example 1

As shown in fig. 1 and 2: the utility model relates to a high-sensitivity Geiger counter probe, which comprises: a metal tube 1 and an anode wire 2; the utility model discloses a ionization space, including tubular metal resonator 1, positive pole silk 2, metal tube 1 both ends are closed and form ionization space 3, in positive pole silk 2 one end was fixed in ionization space 3, outside positive pole silk 2 other end was fixed in ionization space 3, it is insulating between tubular metal resonator 1 and the positive pole silk 2, positive pole silk 2 and 1 one end shutoff 4 contact position of tubular metal resonator are hollow structure, and ionization space 3 is closed completely.

The two ends of the metal pipe 1 are opened, one end of the metal pipe 1 is sealed by a plug 4, and the other end of the metal pipe 1 is sealed by a sealing cover 5.

The anode wire 2 is of a tubular structure.

The other end of the anode wire 2 is sealed by a sealing cap 6.

The anode wire 2 penetrates through the center of the plug 4 and is relatively fixed, and the anode wire 2 is overlapped with the central shaft of the metal pipe 1.

The plug 4, the sealing cover 5 and the sealing cap 6 are all made of glass.

The outer diameter of the anode wire 2 is 0.8mm, and the inner diameter of the anode wire 2 is 0.6 mm.

The anode wire 2 is a gold-plated tungsten wire.

Example 2

The anode wire 2 is of a tubular structure.

The other end of the anode wire 2 is sealed by a sealing cap 6.

The plug 4, the sealing cover 5 and the sealing cap 6 are all made of glass.

The outer diameter of the anode wire 2 is 1.2mm, and the inner diameter of the anode wire 2 is 0.8 mm.

The anode wire 2 is a gold-plated tungsten wire.

Example 3

The anode wire 2 is of a tubular structure.

The other end of the anode wire 2 is sealed by a sealing cap 6.

The plug 4, the sealing cover 5 and the sealing cap 6 are all made of glass.

The outer diameter of the anode wire 2 is 1.0mm, and the inner diameter of the anode wire 2 is 0.7 mm.

The anode wire 2 is a gold-plated tungsten wire.

When the metal pipe 1 and the anode wire 2 are relatively fixed by adopting a fixing device during specific processing of the utility model, attention needs to be paid to the separation between the metal pipe 1 and the anode wire 2, and an opening at one end of the metal pipe 1 is sealed by adopting molten glass to form a plug 4. The anode wire is connected with a gas tank, gas in the metal tube is discharged through the other end when the gas is injected, so that the gas in the metal tube 1 is completely replaced after a period of time, the other end of the metal tube 1 is blocked by molten glass, and the gas tank is closed. And the other end of the anode wire is separated from the interface of the gas tank after glass is dripped and melted, so that the other end of the anode wire forms a sealing cap 6. And keeping the gas injection at the outlet of the gas tank, cooling the molten glass at the outlet of the gas tank, and then breaking and falling off.

The above embodiments are merely illustrative of the principles of the present invention and its effects, and do not limit the present invention. It will be apparent to those skilled in the art that modifications and improvements can be made to the above-described embodiments without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications or changes be made by those skilled in the art without departing from the spirit and technical spirit of the present invention, and be covered by the claims of the present invention.

Claims

1. A high sensitivity geiger counter probe comprising: a metal tube (1) and an anode wire (2); the utility model discloses a ionization space (3) is formed to tubular metal resonator (1) both ends are closed, in positive pole silk (2) one end was fixed in ionization space (3), outside positive pole silk (2) other end was fixed in ionization space (3), it is insulating between tubular metal resonator (1) and positive pole silk (2), its characterized in that: the anode wire (2) and one end of the metal tube (1) are in a hollow structure at the contact position of the plug (4), and the ionization space (3) is completely closed.

2. The high sensitivity geiger counter probe of claim 1, wherein: the metal pipe is characterized in that two ends of the metal pipe (1) are opened, one end of the metal pipe (1) is sealed by a plug (4), and the other end of the metal pipe (1) is sealed by a sealing cover (5).

3. The high sensitivity geiger counter probe of claim 2, wherein: the anode wire (2) is of a tubular structure.

4. A high sensitivity geiger counter probe according to claim 3, wherein: the other end of the anode wire (2) is sealed by a sealing cap (6).

5. The high sensitivity geiger counter probe of claim 4, wherein: the anode wire (2) penetrates through the center of the plug (4) and is relatively fixed, and the anode wire (2) is overlapped with the central shaft of the metal pipe (1).

6. The high sensitivity geiger counter probe of claim 5, wherein: the plug (4), the sealing cover (5) and the sealing cap (6) are all made of glass.

7. The high sensitivity geiger counter probe of claim 6, wherein: the outer diameter of the anode wire (2) is 0.8-1.2 mm, and the inner diameter of the anode wire (2) is 0.6-0.8 mm.

8. The high sensitivity geiger counter probe of claim 7, wherein: the anode wire (2) is a gold-plated tungsten wire.