CN100490053C

CN100490053C - Position-sensitive multi-chamber proportional counter tube

Info

Publication number: CN100490053C
Application number: CNB2005100407254A
Authority: CN
Inventors: 张仁健; 宫一忠; 虞为; 杭恒荣; 刘庆忠; 常进; 蔡明生; 舒双宝; 马涛; 张南; 于敏; 毛建萍
Original assignee: Purple Mountain Observatory of CAS
Current assignee: Purple Mountain Observatory of CAS
Priority date: 2005-06-23
Filing date: 2005-06-23
Publication date: 2009-05-20
Anticipated expiration: 2025-06-23
Also published as: CN1710701A

Abstract

There is metallic wire of cathode inside berylium window and wire of anode is inside cathode. Characters are that six proportional counter tubes constitute multi-cabinet counter. Wire mesh separates off each counter, and separation layer is as cathode layer. Three counters positioned at upper layer are as sensitive counters, and wire of anode is carbon fiber wire in high resistivity. Three counters positioned at lower layer are as anticoincidence counters, and wire of anode is goldplated tungsten wire. The six counters are packed in same container. Not combining counters simply, the invention merges cathode of each counter to constitute a common separation layer. Thus, structure is simplified and weight is reduced. Pulse charges generated by anode wires are split to anodes at two ends, where two amplifiers collect charges. Magnitude of outputting signal is in inverse proportion to length of path. Comparing with signals at two ends can determine location of ionized incident X ray.

Description

Position-sensitive multi-chamber directratio counter tube

Technical field

The present invention relates to a kind of astronomical observation instrument, be specifically related to a kind of structural design that is used for the position-sensitive multi-chamber directratio counter tube of all-sky x-ray source monitoring.

Background technology

Proportional counter tube is a kind of astronomical instrument that the space x-ray source is monitored, and the structure of traditional proportional counter tube is: beryllium window tube is made up of cathodic metal shell and anodic wire by one.The development of research of space x-ray source and monitoring, that need to adopt a plurality of proportional counter tubes constitutes the more full scope of function, for example adopt the sensitive counter tube of several measured X rays and the anti-coincidence counter of removal charged particle background to combine.But, any space instrument, under the prerequisite that satisfies the space environment condition, weight, volume, power consumption etc. are vital Considerations.Tend to run into such situation, a good again research topic only is only because detection instrument weight former thereby the misfortune that failed to be elected.If the simple and mechanical stack combinations of traditional proportional counter tube is adopted in the combination of a plurality of proportional counter tubes, then can produce the problem that aspects such as weight, volume, power consumption do not meet the astronomical observation instrument requirement, and can't use.

Summary of the invention

Task of the present invention provides a kind of technical scheme of a plurality of proportional counter tube combinations, a plurality of proportional counter tube combinations of new construction not only should be satisfied the space environment condition, satisfy the needs of x-ray source monitoring, simultaneously, new departure has tangible improvement to traditional proportional counter tube combination on vital factors such as weight, volume, power consumption.

The scheme of finishing the foregoing invention task is:

The position sensitive multi-wire proportional counter is provided with cathode mesh in the beryllium window, be provided with anodic wire in the middle of the negative electrode, it is characterized in that, form the multicell counter by six proportional counter tubes, separate with woven wire between each proportional counter tube, the double cathode plane of doing of this woven wire interlayer; Three counter tubes in upper strata are sensitive counter tube, and anodic wire is the high resistivity carbon fiber wire, and three counter tubes of lower floor are anti-coincidence counter, and anodic wire is a gold-plated tungsten wire, and six proportional counter tubes are encapsulated in the same container.

Prioritization scheme of the present invention, the double wire spacer structure of doing cathode plane is done following improvement:

1, the wall thickness of chamber wall, upper and lower two sections differ 1～0.5mm, form ladder, so that shelve around last diaphragm plate wiry, upper and lower two districts of electric field shielding;

2, be provided with two grooves in the relevant position of vertical end tube wall, so that intercalation is equally around last upper and lower two vertical clapboards wiry, to realize the electric field isolation between adjacent two proportional counters.

3, the concrete structure of six proportional counter tubes is: the upper strata is the sensitive counter tube of measured X ray, window is the beryllium of 100 μ, anodic wire is the high resistivity carbon fiber wire of 10 μ, and lower floor is for removing the anti-coincidence counter of charged particle background, and anodic wire is the gold-plated tungsten wire of 25 μ.

The present invention is not the simple combination of a plurality of counter tubes, but the negative electrode of each counter tube is merged, simultaneously with the interlayer of this negative electrode as each counter tube, simplify the structure significantly, reduced weight, and the combination of two kinds of a plurality of counter tubes, can finish observation mission better: in sensitive pipe, the ionization that is produced somewhere by incident X-rays is after amplifying, owing to adopted the carbon fiber wire of high resistivity to do anode, the pulse electric charge that is produced in the anodic wire relevant position will be divided to the two ends of anode, collected by two charge amplifiers respectively, its output signal is inversely proportional to the size in path separately, compares the size of two ends output signal, just can accurately determine the position of the incident X-rays of generation ionization.

Description of drawings

Fig. 1 is the fundamental diagram of multi-wire proportional counter;

Fig. 2 is a multi-wire proportional counter structural representation of the present invention;

Fig. 3 is not for around last diaphragm structure schematic diagram wiry.

Embodiment

Embodiment 1, and with reference to Fig. 1～Fig. 2, the fundamental diagram of proportional counter tube: position-sensitive multi-chamber directratio counter tube is at the multicell combinatorial enumeration device of being made up of six proportional counter tubes, separates with woven wire between each counter tube.That is, beryllium window 1 is the beryllium of 100 μ; In window, be provided with cathode mesh 2.The upper strata is the sensitive counter tube 4 of measured X ray, and anodic wire is the high resistivity carbon fiber wire 3 of 10 μ, and lower floor is for removing the anti-coincidence counter 6 of charged particle background, and anodic wire is the gold-plated tungsten wire 5 of 25 μ.

The main points that realize task of the present invention are: utilize the tube wall of chamber wall 7 as corresponding individual count pipe; Thickness of container wall, upper and lower two sections differ 1～0.5mm, form ladder 8, so that shelve around last diaphragm plate 9 wiry (with reference to Fig. 3), upper and lower two districts of electric field shielding; At the relevant position of vertical end tube wall two grooves of spark machined, so that intercalation is equally around last upper and lower two vertical clapboards wiry, to realize the electric field isolation between adjacent two proportional counters.

The invention is not restricted to these disclosed embodiments, the present invention will cover the scope described in the patent claims, and the various distortion of claim scope and equivalence variation.

Claims

1, a kind of position-sensitive multi-chamber directratio counter tube, in the beryllium window, be provided with the cathodic metal silk, establish anodic wire in the middle of the negative electrode, it is characterized in that, form the multicell counter by six proportional counter tubes, separate with woven wire between each proportional counter tube, this woven wire is made up of described cathodic metal silk, forms the double structure of doing cathode plane of wire interlayer; Three counter tubes in upper strata are sensitive counter tube, and anodic wire is a carbon fiber wire, and three counter tubes of lower floor are anti-coincidence counter, and described anodic wire is a gold-plated tungsten wire, and described six proportional counter tubes are encapsulated in the same container;

Thickness of container wall, the upper and lower two-layer 1～0.5mm that differs forms ladder, is shelved on this ladder around the above diaphragm plate wiry, and electric field shielding is upper and lower two-layer.

2, according to the described position-sensitive multi-chamber directratio counter tube of claim 1, it is characterized in that, relevant position at the vertical end of adjacent two proportional counter tubes tube wall is provided with two grooves, in this groove, realize the electric field isolation between adjacent two proportional counter tubes around the above wiry upper and lower two vertical clapboard intercalations.