CN102933018A - Neutron tube with drive-in target - Google Patents
Neutron tube with drive-in target Download PDFInfo
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- CN102933018A CN102933018A CN 201210419247 CN201210419247A CN102933018A CN 102933018 A CN102933018 A CN 102933018A CN 201210419247 CN201210419247 CN 201210419247 CN 201210419247 A CN201210419247 A CN 201210419247A CN 102933018 A CN102933018 A CN 102933018A
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Abstract
The invention relates to a neutron tube with a drive-in target, which relates to an ion beam tube. The neutron tube with a drive-in target disclosed by the invention is composed of an ion source, an accelerating system and a deuterium-tritium reservoir. The neutron tube with a drive-in target disclosed by the invention has the following advantages that (1) the service life is long. When the neutron tube is running, the consumed tritium energy in the target is timely compensated, and the target is always kept in a saturation state, once an enough deuterium-tritium gas mixture is distributed in the deuterium-tritium reservoir of the tube, enough deuterium and tritium are distributed in the target, so that continuous and stable neutrons are generated; (2) the operating temperature is high. The thorough gas removal of components in the tube is ensured, so that a situation that the target has a s good heat dissipation effect is ensured, and even if the target is running in an environment at a temperature of 175 DEG C, no mixed gas is released from the inside of the tube, and no deuterium-tritium gas is released from the inside of the target; and (3) the stability is good. In the process of running, the deuterium-tritium content in the target is automatically compensated and kept constant, thereby ensuring the stable neutron output; and because the deuterium-tritium reservoir with a large inspiratory capacity and a high inspiratory flow rate is adopted, the stability of air pressure in the tube is ensured, and the stability of electric parameters is also ensured.
Description
Technical field
The present invention relates to a kind of ion beam tube.
Background technology
The controllable neutron source that is comprised of neutron tube has been widely used in the loggers such as pulsed neutron power spectrum, thermal capture, neutron lifetime and oxygen activation current as the vitals of Nuclear Logging Tools.These instruments are one of outer best approaches of altering groove detection and injection profile logging of evaluating reservoir in the production logging, pipe.But along with going deep into of oil field development, the neutron tube technology can not satisfy the needs of these logging technique development at present, and the working temperature of domestic controllable neutron source generally is no more than 150 ℃, and this depends on the working temperature of neutron tube to a great extent.Therefore, 175 ℃ of high temperature neutron tubes of research and development are lifting controllable neutron source heatproof indexs, enlarge the key technology that the controllable neutron source technical applications at first will be captured.
Summary of the invention
The present invention aims to provide a kind of working temperature and improves, the setl-target neutron tube that prolong useful life.
Setl-target neutron tube of the present invention, by ion source, accelerating system, target and deuterium tritium holder form.
Preferably, ion source is cold-cathode Penning ion source, is comprised of anode, negative electrode, output cathode and magnet steel.
More preferably, negative electrode is that the spirogyrate Mo forms, and the spacing between itself and the anode is 2mm.
Perhaps more preferably, output cathode is circular planar disk-like.
Perhaps more preferably, magnet steel is the SmCo magnet steel.
Perhaps preferably, accelerating system is 1 single crack accelerating system, and it is comprised of the output cathode in the ion source and accelerating electrode.
More preferably, the aperture of output cathode is 4-5mm.
Perhaps preferably, target is circular cone concave shape oxygenless copper material.
More preferably, the getter in the deuterium tritium holder is zirconium-graphite material.
The present invention has the following advantages.
(1) long service life.The tritium of target internal consumption can in time be compensated during setl-target neutron tube work of the present invention, and remain the target saturation condition, as long as in the deuterium tritium holder enough deuterium tritium gaseous mixtures are arranged in the pipe, enough deuteriums and tritium are just arranged in the target, setl-target neutron tube of the present invention will have the neutron of continous-stable to produce.
(2) working temperature is high.Adopt setl-target neutron tube structure of the present invention, guaranteed that the part degasification is thorough in the pipe, guaranteed that target has good radiating effect, even setl-target neutron tube of the present invention is operated in 175 ℃ of environment, can be from not managing interior release impurity removal gas and in target, discharging the deuterium tritium gas yet.
(3) good stability.During setl-target neutron tube of the present invention work, the deuterium tritium level auto-compensation in the target and keep constant has guaranteed stable neutron output; Adopt the deuterium tritium holder that inspiratory capacity is large, gettering rate is high, guaranteed the stable of the interior operating air pressure of pipe, also guaranteed the stable of electrical quantity.
Description of drawings
Fig. 1 is the structural representation of embodiment one.
Fig. 2 is heatproof test curve figure among the embodiment three.
Embodiment
Embodiment one.
Setl-target neutron tube, by ion source, accelerating system, target and deuterium tritium holder form.Ion source is cold cathode 2 Penning ion sources, is comprised of anode 1, negative electrode 2, output cathode 3 and SmCo magnet steel 4.Negative electrode 2 is that the spirogyrate Mo forms, and the spacing between itself and the anode 1 is 2mm.Output cathode 3 is circular planar disk-like.Accelerating system is 1 single crack accelerating system, and it is comprised of output cathode 3 and the accelerating electrode in the ion source.Wherein the aperture of output cathode 3 is 4-5mm.Target is circular cone concave shape oxygenless copper material.Getter in the deuterium tritium holder is zirconium-graphite material.
Embodiment two.
In room temperature environment, detect the neutron yield of embodiment one described setl-target neutron tube with the work in copper method.Its result is as shown in the table.
According to said method and test data, trying to achieve this neutron tube neutron yield under 120 kV/100 μ A conditions is 2.9 * 10
8N/s.
Embodiment three.
Embodiment one described setl-target neutron tube is carried out 175 ℃ high temperature experiment, lasted 8.5 h.By regulating voltage or the current value of deuterium tritium holder, keep target to press and target flow valuve constant (be that target is pressed 120 kV, target flows 100 μ A) in experimentation, observe the variation of neutron yield and anode 1 electric current, its empirical curve is seen Fig. 2.As shown in Figure 2, in 1 initial h, namely temperature is below 50 ℃, and the variation of neutron yield is very little.When temperature in 60～175 ℃ of scopes, neutron yield is on a declining curve along with the gradually rising of temperature.When temperature rises to 175 ℃ and enter the people flat-temperature zone, along with the steady neutron yield of temperature also tends towards stability thereupon.Always very stable at whole experimentation Anodic 1 electric current, maximum changing amplitude is no more than 30 μ A, 0.04 A and the electric current of deuterium tritium holder (being the intraductal atmospheric pressure regulating system) has only descended.
By experiment as can be known, embodiment one described setl-target neutron tube can work in 175 ℃ temperature environment, and the operating time has surpassed 4 h, do not have not make the assorted gas of the interior release of pipe because temperature raises, not because the temperature rising is overflowed the interior deuterium tritium gas of target and caused intraductal atmospheric pressure uncontrollable yet.Learn that as calculated neutron yield has only descended 24% in room temperature to the 175 ℃ temperature range, can satisfy the needs of practical logging fully.
Embodiment four.
Following table has been added up the overall operating position of 11 neutron tubes during 2003～2010 years, and it can illustrate overall useful life and the overall quality level of setl-target neutron tube.By following table as can be known, 373 h have been reached the average life of neutron tube.
Claims (9)
1. setl-target neutron tube is characterized in that by ion source, accelerating system, and target and deuterium tritium holder form.
2. setl-target neutron tube as claimed in claim 1 is characterized in that ion source is cold cathode (2) Penning ion source, is comprised of anode (1), negative electrode (2), output cathode (3) and magnet steel (4).
3. setl-target neutron tube as claimed in claim 2 is characterized in that negative electrode (2) is that the spirogyrate Mo forms, and the spacing between itself and the anode (1) is 2mm.
4. setl-target neutron tube as claimed in claim 2 is characterized in that output cathode (3) is circular planar disk-like.
5. setl-target neutron tube as claimed in claim 2 is characterized in that magnet steel (4) is SmCo magnet steel (4).
6. setl-target neutron tube as claimed in claim 1 is characterized in that accelerating system is 1 single crack accelerating system, and it is comprised of the output cathode in the ion source (3) and accelerating electrode.
7. setl-target neutron tube as claimed in claim 6, the aperture that it is characterized in that output cathode (3) is 4-5mm.
8. setl-target neutron tube as claimed in claim 1 is characterized in that target is circular cone concave shape oxygenless copper material.
9. setl-target neutron tube as claimed in claim 8 is characterized in that the getter in the deuterium tritium holder is zirconium-graphite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210419247 CN102933018A (en) | 2012-10-29 | 2012-10-29 | Neutron tube with drive-in target |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210419247 CN102933018A (en) | 2012-10-29 | 2012-10-29 | Neutron tube with drive-in target |
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| CN102933018A true CN102933018A (en) | 2013-02-13 |
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| CN 201210419247 Pending CN102933018A (en) | 2012-10-29 | 2012-10-29 | Neutron tube with drive-in target |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813611A (en) * | 2014-02-25 | 2014-05-21 | 中国工程物理研究院核物理与化学研究所 | Small directional high-flux neutron generator |
| CN106098507A (en) * | 2016-06-30 | 2016-11-09 | 西安冠能中子探测技术有限公司 | A kind of setl-target neutron tube fills tritium platform and fills tritium method |
| CN109699114A (en) * | 2019-02-18 | 2019-04-30 | 中国科学院合肥物质科学研究院 | A kind of MULTILAYER COMPOSITE neutron-producing target and preparation method thereof |
| CN109767856A (en) * | 2018-12-28 | 2019-05-17 | 西安交通大学 | A kind of neutron source target system |
| CN113140347A (en) * | 2021-03-25 | 2021-07-20 | 中科石金(安徽)中子技术有限公司 | High-temperature-resistant miniature neutron source |
-
2012
- 2012-10-29 CN CN 201210419247 patent/CN102933018A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813611A (en) * | 2014-02-25 | 2014-05-21 | 中国工程物理研究院核物理与化学研究所 | Small directional high-flux neutron generator |
| CN103813611B (en) * | 2014-02-25 | 2015-11-18 | 中国工程物理研究院核物理与化学研究所 | Compact directional high flux neutron generator |
| CN106098507A (en) * | 2016-06-30 | 2016-11-09 | 西安冠能中子探测技术有限公司 | A kind of setl-target neutron tube fills tritium platform and fills tritium method |
| CN106098507B (en) * | 2016-06-30 | 2018-01-12 | 西安冠能中子探测技术有限公司 | A kind of setl-target neutron tube fills tritium platform and its fills tritium method |
| CN109767856A (en) * | 2018-12-28 | 2019-05-17 | 西安交通大学 | A kind of neutron source target system |
| CN109699114A (en) * | 2019-02-18 | 2019-04-30 | 中国科学院合肥物质科学研究院 | A kind of MULTILAYER COMPOSITE neutron-producing target and preparation method thereof |
| CN113140347A (en) * | 2021-03-25 | 2021-07-20 | 中科石金(安徽)中子技术有限公司 | High-temperature-resistant miniature neutron source |
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Application publication date: 20130213 |