CN102608650B - Method for detecting distribution of deuterium particle beams - Google Patents
Method for detecting distribution of deuterium particle beams Download PDFInfo
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- CN102608650B CN102608650B CN201210032416.2A CN201210032416A CN102608650B CN 102608650 B CN102608650 B CN 102608650B CN 201210032416 A CN201210032416 A CN 201210032416A CN 102608650 B CN102608650 B CN 102608650B
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- deuterium
- solid state
- state nuclear
- nuclear track
- distribution
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Abstract
The invention provides a method for detecting the distribution of deuterium particle beams. The method is characterized by comprising the following steps: (1) arranging a CR-39 solid state nuclear track detector on the rear surface of a deuterium target or a tritium target of an accelerator based neutron source; (2) recording a number of tracks on the surface of the CR-39 solid state nuclear track detector after the accelerator based neutron source is irradiated by a microscope; and (3) by a mapping relation N=4pi*X/(sigmar sigmap delta Omega) between a deuterium particle number N on the surface of the deuterium target or the tritium target and the number X of the tracks on the surface of the CR-39 solid state nuclear track detector, inverting the distribution of the deuterium particle beams by the number X of the tracks. According to the method, the measurement on the distribution of the deuterium particle beams can be implemented and the interference of impurity particles is effectively avoided; the distribution of high-current deuterium particle beams in an order range of milliampere to ampere can be measured; and the thermal effect generated by energy deposition in the direct action process of the high-current particle beams and the CR-39 solid state nuclear track detector is effectively overcome.
Description
Technical field
The invention belongs to accelerator physics and neutronics field, be specifically related to a kind of method utilizing CR-39 solid state nuclear track detector to detect the distribution of deuterium particle beam.
Background technology
CR-39 solid state nuclear track detector is a kind of integral form detector, when charged particle enters solid state nuclear track material, around its range track, is causing radiation damage, and form Latent track, damage radius generally only has nanoscale.When this Latent track is through the chemical etching process of certain condition, the principle that be corroded easier than the region that is without damage that utilize damaged region, Latent track in material for detector is amplified, thus reaches the observable micron order degree of common smooth light microscope, to record population and distribution.CR-39 solid state nuclear track detector be the highest a kind of solid state nuclear track detector of the sensitivity that found so far this, it can record proton and the ion heavier than proton, and by track parameter as track diameter etc. differentiates ionic species, energy and space distribution.Because neutron is not charged, directly can not form track in CR-39 solid state nuclear track detector, but neutron and CR-39 solid state nuclear track detector interaction energy produce recoil nucleus, recoil nucleus can form track in CR-39 solid state nuclear track detector, therefore, detected neutron can be carried out by the track of recoil nucleus.
Openly report that the principal feature of CR-39 solid state nuclear track detector particle detection line distribution is that line detect large-scale accelerator distributes and beam intensity less (microampere magnitude or lower than microampere magnitude), have no the relevant report utilizing CR-39 solid state nuclear track detector to detect the distribution of high current deuterium particle beam, main cause is the performance change that energy deposition produces under the effect of intense beam stream thermal effect makes CR-39 solid state nuclear track detector.
Summary of the invention
The present invention seeks to solve prior art can only utilize CR-39 solid state nuclear track detector to detect microampere magnitude or the deficiency lower than the distribution of microampere magnitude line, provides a kind of method utilizing CR-39 solid state nuclear track detector to detect deuterium distribution of particles in accelerator neutron generator.
The technical scheme that the present invention realizes described in above-mentioned purpose is as follows:
Detect a method for deuterium particle beam distribution, the method is as follows,
(1) CR-39 solid state nuclear track detector is arranged on the deuteron target of accelerator neutron generator or the rear surface of tritium target;
(2) record is carried out with the track number of microscope to the CR-39 solid state nuclear track detector surface after accelerator neutron generator irradiation;
(3) mapping relations by meeting between the deuterium population N of deuteron target or tritium target surface and the track number X on CR-39 solid state nuclear track detector surface, by the distribution of track number X inverting deuterium particle beam,
Described mapping relations are:
Wherein,
for track place CR-39 solid state nuclear track detector surface to produce this track neutron source the solid angle of opening;
for deuterium-deuterium or deuterium-tritium body reaction cross-section;
for Proton Elastic Scattering cross section.
When the principle that the present invention realizes above-mentioned purpose is accelerator neutron generator work, deuterium particle and deuteron target or tritium target generation deuterium-deuterium or deuterium-tritium fusion nucleus react and produce neutron, neutron interacts with CR-39 solid state nuclear track detector and produces recoil nucleus, and recoil nucleus can form track in CR-39 solid state nuclear track detector.In geocentric coordinate system, Neutron angular distribution when deuterium-deuterium or deuterium-tritium fusion nucleus reaction presents isotropy, therefore, according to the mapping relations between the track number that the deuterium population of target surface and CR-39 solid state nuclear track detector surface are formed, thus the distribution of track inverting deuterium particle on target surface that formed in CR-39 solid state nuclear track detector based on recoil nucleus can be realized.
Advantage of the present invention is: (1) can realize deuterium particle beam distribution measuring, effectively avoids foreign particle to disturb; (2) the high current deuterium particle beam distribution within milliampere to order of amps scope can be measured, effectively overcome the thermal effect that in the high current particle beams and CR-39 solid state nuclear track detector direct effect process, energy deposition produces; (3) detection of deuterium particle beam distribution in accelerator neutron generator is applicable to.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
Utilize the concrete steps of CR-39 solid state nuclear track detector detection deuterium particle beam distribution as follows:
1) sampling observation of CR-39 solid state nuclear track detector
1 piece of CR-39 solid state nuclear track detector is extracted in same batch, taking-up after temperature is 70 DEG C and volumetric molar concentration is be incubated 15 hours in the NaOH solution of 5.5mol/L, digital microscope is used to observe CR-39 solid state nuclear track detector when amplification 100 times, if non tracking, then show that this batch of CR-39 solid state nuclear track detector is suitable for selecting, otherwise, if CR-39 solid state nuclear track detector is preserved bad or is exposed in an atmosphere, in cosmic rays, α particle will cause damage to it, form very heavy background, be so just not suitable for selecting;
2) processing of CR-39 solid state nuclear track detector
From qualified batch, choose 1 piece of CR-39 solid state nuclear track detector, be processed into accelerator neutron generator target size, ensure in process that the surface of CR-39 solid state nuclear track detector stands intact, accelerator neutron generator target is deuteron target or tritium target;
3) cleaning of CR-39 solid state nuclear track detector
Rinse CR-39 solid state nuclear track detector with clean-out system and clear water, then with alcohol-pickled, natural air drying, finally by microscopic to guarantee clean surface, do not stay washmarking;
4) installation of CR-39 solid state nuclear track detector
By the index face of CR-39 solid state nuclear track detector and accelerator neutron generator target rear surface close contact, and ensure that the surface of CR-39 solid state nuclear track detector is parallel with target surface;
5) etching of CR-39 solid state nuclear track detector
Take out after temperature is 70 DEG C and volumetric molar concentration is be incubated 15 hours to CR-39 solid state nuclear track detector in the NaOH solution of 5.5mol/L, use digital microscope to characterize the CR-39 solid state nuclear track detector after experiment when amplification 100 times, and record is carried out to the track number on its surface;
6) track inverting
Mapping relations between the track number formed on CR-39 solid state nuclear track detector surface according to the deuterium population of target surface and the neutron that produces herein, based on the distribution of track inverting deuterium particle on target surface that recoil nucleus is formed in CR-39 solid state nuclear track detector, deuterium population N and track number X meets following relation:
Wherein,
for track place CR-39 solid state nuclear track detector surface to produce this track neutron source the solid angle of opening;
for deuterium-deuterium or deuterium-tritium body reaction cross-section;
for Proton Elastic Scattering cross section.
Claims (1)
1. detect a method for deuterium particle beam distribution, it is characterized in that:
(1) CR-39 solid state nuclear track detector is arranged on the deuteron target of accelerator neutron generator or the rear surface of tritium target;
(2) record is carried out with the track number of microscope to the CR-39 solid state nuclear track detector surface after accelerator neutron generator irradiation;
(3) mapping relations by meeting between the deuterium population N of deuteron target or tritium target surface and the track number X on CR-39 solid state nuclear track detector surface, by the distribution of track number X inverting deuterium particle beam,
Described mapping relations are:
Wherein,
for track place CR-39 solid state nuclear track detector surface to produce this track neutron source the solid angle of opening;
for deuterium-deuterium or deuterium-tritium body reaction cross-section;
for Proton Elastic Scattering cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210032416.2A CN102608650B (en) | 2012-02-14 | 2012-02-14 | Method for detecting distribution of deuterium particle beams |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210032416.2A CN102608650B (en) | 2012-02-14 | 2012-02-14 | Method for detecting distribution of deuterium particle beams |
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| CN102608650A CN102608650A (en) | 2012-07-25 |
| CN102608650B true CN102608650B (en) | 2015-01-21 |
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| CN201210032416.2A Expired - Fee Related CN102608650B (en) | 2012-02-14 | 2012-02-14 | Method for detecting distribution of deuterium particle beams |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103176202B (en) * | 2013-04-12 | 2014-12-10 | 中国工程物理研究院核物理与化学研究所 | Device and method for measuring components of deuterium ion beam of deuterium-tritium neutron tube |
| CN104597476B (en) * | 2014-12-25 | 2017-08-25 | 东莞中子科学中心 | A kind of accelerator particle beam section real-time diagnosis system |
| CN105700029B (en) * | 2016-01-22 | 2018-11-16 | 清华大学 | The method, apparatus and system of check object based on cosmic ray |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3273875B2 (en) * | 1995-07-06 | 2002-04-15 | アロカ株式会社 | Neutron detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4190941C2 (en) * | 1990-04-27 | 2001-07-26 | Hitachi Ltd | Neutron dosimeter and process for its manufacture |
| US6542565B2 (en) * | 2000-10-18 | 2003-04-01 | Westinghouse Electric Co., Llc | Semiconductor radiation source power monitor |
| WO2011002906A1 (en) * | 2009-06-30 | 2011-01-06 | The Penn State Research Foundation | Solid-state nuclear detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3273875B2 (en) * | 1995-07-06 | 2002-04-15 | アロカ株式会社 | Neutron detector |
Non-Patent Citations (4)
| Title |
|---|
| 《用20—1020keV单能质子刻度CR-39固体核径迹探测器》;段晓礁等;《物理学报》;20100531;第59卷(第5期);全文 * |
| JP特许第3273875号B2 2002.02.01 * |
| JP特開2000-147129A 2000.05.26 * |
| 李俊雯.《固体核径迹探测器在中子辐射监测中的应用》.《核电子学与探测技术》.2004,第24卷(第1期),全文. * |
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