CN101272656A - High-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron pipe - Google Patents
High-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron pipe Download PDFInfo
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- CN101272656A CN101272656A CNA2008100180704A CN200810018070A CN101272656A CN 101272656 A CN101272656 A CN 101272656A CN A2008100180704 A CNA2008100180704 A CN A2008100180704A CN 200810018070 A CN200810018070 A CN 200810018070A CN 101272656 A CN101272656 A CN 101272656A
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- deuterium
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Abstract
The invention relates to a small laser deuterium-deuterium fusion neutron tube with a high temperature and high pressure. An insulation layer is arranged in the inner wall of the tube. A cathode and an anode in the cathode are arranged in the tube. A cathode corner connected with the cathode and an anode corner connected with the anode are arranged on the external lower part of the tube. The top of the tube is a transparent body and the tube is filled with deuterium gas. In the invention, the external diameter of the cathode is 40 mm and the internal diameter is 30-34 mm, as well as the height is 110-150 mm. a center hole with an aperture of 20-23 mm is arranged on the bottom center of the cathode. The anode is positioned in the center hole of the bottom. The anode and the cathode have a same shaft. The diameter of the anode is 8-15 mm and the height is 100-120 mm. The tube is filled with deuterium gap. The neutron tube of the invention has the advantages of small volume, high temperature resistance, high pressure resistance, high productivity and long service life, etc. The neutron tube is a component of an oil logging tool which can satisfy the neutron-neutron well detection under the conditions of high temperature 150 DEG C or more than 150 DEG C and the high pressure 80MPa or more than 80MPa.
Description
Technical field
The invention belongs to HTHP laser neutron source technical field, be specifically related to laser plasma D-D (deuterium-deuterium) fusion neutron source.
Background technology
It is one of ten big important subjects of naphthology technology that oil well logging is learned.The well logging of neutron well logging or neutron-neutron time spectrum, and neutron-capture gamma logging or neutron-capture the gamma spectrometry log technology, its developing direction is to adopt controllable pulse neutron source.The controllable pulse neutron tube yield of present domestic well logging usefulness is low, useful life short, employed acceleration type D-T (deuterium-tritium) nuclear reaction pulse neutron tube, and nuclear reaction pulse neutron tube neutron yield is low, and about 10
8Neutron/second, even 10
7N/s in only tens hours useful life, generally is no more than 100 hours.Because D-D (deuterium-deuterium) nuclear reaction pulsed neutron source yield is too low, therefore, does not still have D-D nuclear reaction pulse neutron tube at present.
Summary of the invention
A technical problem to be solved by this invention is to overcome the shortcoming of above-mentioned controllable pulse neutron tube, provides that a kind of volume is little, high temperature resistant, high pressure resistant, yield is high, the high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of long service life.
Solving the problems of the technologies described above the technical scheme that is adopted is: inboard wall of tube body is provided with insulating barrier, be provided with negative electrode and the anode that is positioned at negative electrode in the body, the outer lower end of body is provided with negative electrode turning that is connected with negative electrode and the anode turning that is connected with anode, the top of body is the transparent body, is filled with deuterium gas in the body.The external diameter of negative electrode of the present invention is that 40mm, internal diameter are that 30～34mm, height are 110～150mm, the bottom centre of negative electrode is processed with the centre bore that the aperture is 20～23mm, anode is positioned at the centre bore of bottom, anode is coaxial with negative electrode, the diameter of anode is that 8～15mm, height are 100～120mm, is filled with deuterium gas in body.
The preferred negative electrode internal diameter of the present invention is that 30～33mm, height are that 110～140mm, bottom centre aperture are 20～22mm, and the preferred diameter of anode is 8～14mm.
The negative electrode internal diameter of the best of the present invention is that 30mm, high center bore for 130mm, bottom are 22mm, and the external diameter of best anode is 10mm, the high 120mm of being.
The deuterium atmospheric pressure that fills in the body of the present invention is 520～550Pa.
The transparent body of the present invention is a quartz window.
The present invention compares with existing controllable pulse neutron tube, in body, be filled with deuterium gas, the body upper end is the transparent body, the transparent body that passes the body top by the laser emitted laser shines the deuterium gas in the body, after negative electrode and anode and 20000～25000V high-voltage DC power supply are connected, produce plasma focus and make the fusion of deuterium deuterium, emitted energy is the neutron of 2.45MeV, and neutron yield reaches 10
9Neutron/pulse, the life-span reaches 10000 hours, can be used as laser plasma (deuterium-deuterium) fusion neutron source.The present invention has little, high temperature resistant, high pressure resistant, the advantages such as yield is high, long service life of volume.The present invention is a device forming oil logging tool, under the environmental condition of high temperature, 80MPa or the above high pressure of 80MPa more than 150 ℃ or 150 ℃, can satisfy the well logging of neutron-neutron logging or neutron-neutron time spectrum, neutron-capture gamma logging or neutron-capture gamma spectrometry log.
Description of drawings
Fig. 1 is the structural representation of an embodiment of invention.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
In Fig. 1, the high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of present embodiment is made of body 1, windowpane 2, negative electrode 3, anode 4, insulating barrier 5, negative electrode turning 6,7 connections of anode turning.
The high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of this structure reaches 10000 hours useful life, and neutron energy 2.45MeV, neutron yield reach 10
9The laser plasma of neutron/pulse (deuterium-deuterium) fusion neutron source.The present invention is a device forming oil logging tool, under the environmental condition of high temperature, 80MPa or the above high pressure of 80MPa more than 150 ℃ or 150 ℃, can satisfy the well logging of neutron-neutron logging or neutron-neutron time spectrum, neutron-capture gamma logging or neutron-capture gamma spectrometry log.
The principle that present embodiment high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube produces neutron is as follows:
At high temperature more than 150 ℃ or 150 ℃, under the environmental condition of 80MPa or the above high pressure of 80MPa, the transparent body that passes body 1 top by the laser emitted laser shines the deuterium gas in the body 1, after negative electrode 3 and anode 4 and 20～25KV high-voltage DC power supply are connected, dielectric surface flashover takes place on the insulator between two electrodes, discharge channel connects anode 4 and negative electrode 3, when passing through discharge channel, electric current produces self-magnetic field, it is that the plasma current sheath is outside that Lorentz lorentz (Lorentz) power that electric current and self-magnetic field interaction produce will make discharge channel, also upwards accelerated motion simultaneously, along with continuing of discharge, the electric current sheath is accelerated to anode 4 terminals, then in ends pinch and the very thin high density of formation, the high-temperature plasma focus, and making the fusion of deuterium deuterium, emitted energy is the neutron of 2.45MeV.
In the present embodiment, the external diameter of negative electrode 3 is that 40mm, internal diameter are 32mm, the high 110mm of being, the bottom centre of negative electrode 3 is processed with the centre bore that the aperture is 22mm, and anode 4 is a club shaped structure, and the external diameter of anode 4 is 8mm, the high 100mm of being.After being evacuated to vacuum in the body 1, charge into pure deuterium gas, the pressure that fills deuterium gas is 535Pa.The connecting relation of other parts and parts is identical with embodiment 1.
The principle that present embodiment high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube produces neutron is identical with embodiment 1.
In the present embodiment, the external diameter of negative electrode 3 is that 40mm, internal diameter are 34mm, the high 150mm of being, the bottom centre of negative electrode 3 is processed with the centre bore that the aperture is 23mm, and anode 4 is a club shaped structure, and the external diameter of anode 4 is 15mm, the high 120mm of being.After being evacuated to vacuum in the body 1, charge into pure deuterium gas, the pressure that fills deuterium gas is 550Pa.The connecting relation of other parts and parts is identical with embodiment 1.
The principle that present embodiment high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube produces neutron is identical with embodiment 1.
Claims (5)
1, a kind of high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube, body (1) inwall is provided with insulating barrier (5), be provided with negative electrode (3) in the body (1) and be positioned at the anode (4) of negative electrode (3), the outer lower end of body (1) is provided with negative electrode turning (6) that is connected with negative electrode (3) and the anode turning (7) that is connected with anode (4), it is characterized in that: the top of body (1) is the transparent body, and body is filled with deuterium gas in (1); The external diameter of said negative electrode (3) is that 40mm, internal diameter are that 30～34mm, height are 110～150mm, the bottom centre of negative electrode (3) is processed with the centre bore that the aperture is 20～23mm, anode (4) is positioned at the centre bore of bottom, anode (4) is coaxial with negative electrode (3), the diameter of anode (4) is that 8～15mm, height are 100～120mm, is filled with deuterium gas in body (1).
2, according to the described high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of claim 1, it is characterized in that: wherein negative electrode (3) internal diameter is that 30～33mm, height are 110～140mm, the bottom centre aperture of negative electrode (3) is 20～22mm, and the diameter of anode (4) is 8～14mm.
3, according to the described high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of claim 1, it is characterized in that: wherein negative electrode (3) internal diameter is 30mm, the high 130mm of being, the center bore of negative electrode (3) bottom is 20mm, and the external diameter of anode (4) is 10mm, the high 120mm of being.
4, according to the described high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of claim 1, it is characterized in that: the pressure of the said deuterium gas that fills in body (1) is 520～550Pa.
5, according to the described high-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron tube of claim 1, it is characterized in that: the said transparent body is quartz window (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100180704A CN101272656B (en) | 2008-04-28 | 2008-04-28 | High-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100180704A CN101272656B (en) | 2008-04-28 | 2008-04-28 | High-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron pipe |
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| Publication Number | Publication Date |
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| CN101272656A true CN101272656A (en) | 2008-09-24 |
| CN101272656B CN101272656B (en) | 2010-10-20 |
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| CN2008100180704A Expired - Fee Related CN101272656B (en) | 2008-04-28 | 2008-04-28 | High-temperature high-voltage miniature laser deuterium-deuterium atomic fusion neutron pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916607A (en) * | 2010-07-28 | 2010-12-15 | 北京大学 | Small neutron source adopting windowless gas target |
| CN103513287A (en) * | 2012-06-19 | 2014-01-15 | 王新光 | A well logging method utilizing a direct current controllable neutron source to calculate a stratum density |
| CN111050457A (en) * | 2019-12-27 | 2020-04-21 | 西京学院 | Device and method for improving neutron yield based on laser-induced plasma |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU457406A1 (en) * | 1972-12-25 | 1980-04-25 | Всесоюзный Научно-Исследовательский Институт Ядерной Геофизики И Геохимии | Pulsed neutron generator |
| CN2378535Y (en) * | 1998-05-19 | 2000-05-17 | 大庆石油管理局生产测井研究所 | Downhole pulse neutron generator |
-
2008
- 2008-04-28 CN CN2008100180704A patent/CN101272656B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916607A (en) * | 2010-07-28 | 2010-12-15 | 北京大学 | Small neutron source adopting windowless gas target |
| CN103513287A (en) * | 2012-06-19 | 2014-01-15 | 王新光 | A well logging method utilizing a direct current controllable neutron source to calculate a stratum density |
| CN103513287B (en) * | 2012-06-19 | 2016-12-21 | 王新光 | A kind of logging method utilizing direct current controllable neutron source to calculate density of earth formations |
| CN111050457A (en) * | 2019-12-27 | 2020-04-21 | 西京学院 | Device and method for improving neutron yield based on laser-induced plasma |
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| CN101272656B (en) | 2010-10-20 |
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Granted publication date: 20101020 Termination date: 20130428 |