CN101403766A - Novel fast neutron detector - Google Patents
Novel fast neutron detector Download PDFInfo
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- CN101403766A CN101403766A CNA2008102255052A CN200810225505A CN101403766A CN 101403766 A CN101403766 A CN 101403766A CN A2008102255052 A CNA2008102255052 A CN A2008102255052A CN 200810225505 A CN200810225505 A CN 200810225505A CN 101403766 A CN101403766 A CN 101403766A
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- glass
- fast neutron
- detector
- neutron
- film
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- 239000011521 glass Substances 0.000 claims abstract description 48
- 239000004698 Polyethylene Substances 0.000 claims abstract description 17
- -1 polyethylene Polymers 0.000 claims abstract description 17
- 229920000573 polyethylene Polymers 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 229920002799 BoPET Polymers 0.000 claims abstract description 10
- 239000005041 Mylar™ Substances 0.000 claims abstract description 10
- 239000004677 Nylon Substances 0.000 claims abstract description 7
- 229920001778 nylon Polymers 0.000 claims abstract description 7
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 8
- 230000001413 cellular effect Effects 0.000 claims description 6
- 239000001282 iso-butane Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000003384 imaging method Methods 0.000 abstract description 3
- 238000003745 diagnosis Methods 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 description 6
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011173 large scale experimental method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The invention discloses a novel fast neutron detector, belonging to the field of radiation detection. The fast neutron detector consists of a honeycomb plate, a circuit board, a Mylar film, a carbon film, electrode glass, a polyethylene film, an organic glass column, a nylon wire, a high-voltage conductive wire, and middle electrode glass. The response sensitiveness of MRPC to the fast neutron is improved by attaching the polyethylene film on the MRPC electrode glass. The detector improves the detection efficiency to the fast neutron on the premise of retained time resolution; furthermore, the detector has extremely high neutron Gama resolution capability. The detector can be used for neutron spectrum measurement, neutron imaging, pulse neutron strength diagnosis and the like.
Description
Technical field:
The invention belongs to the radiation detection field, particularly a kind of novel fast neutron detector.
Background technology:
Many air gaps resistance board chamber (MRPC) is a kind of novel gas detector.Because it has good time resolution performance, obtained in the high-energy physics experiment field using widely.U.S. Brookhaven National Laboratory adopts the MRPC technology to build flight time detector, and some other large-scale experiment device also prepares to adopt MRPC to build flight time detector.Because MRPC adopts sheet glass to do electrode, the mixed gas that adopts a certain proportion of F134a and isobutane is as working gas, all these materials are all insensitive to uncharged fast neutron, be the response sensitivity of Enhanced MR PC to fast neutron, to improve existing MRPC, to improve its response sensitivity fast neutron.
Summary of the invention:
The objective of the invention is the response sensitivity to fast neutron for Enhanced MR PC, provide a kind of novel fast neutron detector to improve its response sensitivity to fast neutron, it is characterized by, described novel fast neutron detector is by cellular board 1, circuit board 2, Mylar film 3, carbon film 4, electrode glass 5, polyethylene film 6, organic glass post 7, nylon wire 8, high-voltage conducting wires 9 and target glass 10 are formed, cellular board 1 sticks on the face of circuit board 2, it is bonding to be printed on another side and the Mylar film 3 of reading bar 11 on the circuit board 2, Mylar film 3 is pasted together with carbon film 4 again, electrode glass 5 sticks on the carbon film 4, the another side of top electrode glass 5 sticks layer of polyethylene film 6, be symmetrical on the top-bottom electrode structures, also have 3～5 blocks of target glass 10 up and down between the two cube electrode glass 5, paste layer of polyethylene film 6 on every block of target glass 10 face down, be that the nylon wire 8 of 0.2～0.3mm separates between electrode glass 5 and the target glass 10 and between the adjacent target glass 10 by diameter, be fixed with organic glass post 7 around the electrode glass, high-voltage conducting wires 9 is welded on the carbon film 4.
The thickness of described every layers of polyethylene film is 0.1～0.3mm.
Be printed on 5～8 on the described circuit board 2 and read bar 11.
Described detector operation gas is 95% F134a and 5% isobutane mixed gas.
Ultimate principle of the present invention is, electrode glass surface at MRPC adds the tygon thin layer, the secondary proton that neutron and its interaction produce enters in the working gas, make the working gas ionization of MRPC, electronics that ionization produces and ion are in snowslide amplification and induce electric charge at collector in gas when the two poles of the earth drift abouts under the highfield effect.Because the proton that neutron produces is more much better than than the ionization of electronics in gas that gamma-rays produces, thereby can realize that higher n/ γ differentiates in materials such as glass plate, tygon in tygon.This detector temporal resolution is better than 100ps.If require to hang down a bit slightly the time response to detector, as about 500ps, then can suitably increase the thickness of polyethylene layer, improve detection sensitivity to neutron.Analog computation shows that when when increase thickness in MRPC electrode glass surface is the polyethylene layer of 0.3mm, it reaches more than 20 times the neutron of 14MeV and the gamma-ray n/ γ resolution characteristic of 1.25MeV.
Beneficial effect of the present invention is not only fast neutron to be had certain sensitivity through the MRPC behind this method improvement, but also has higher n/ γ (neutron gamma) resolution characteristic.Simultaneously, because this detector adopts the printed board technique modelled signal to read bar, so this detector can have higher spatial resolving power, can be used for the neutron imaging Study on Technology.
Description of drawings:
Fig. 1, fast neutron detector structural representation.
Embodiment:
Novel fast neutron detector as shown in Figure 1, it is by cellular board 1, circuit board 2, Mylar film 3, carbon film 4, electrode glass 5, polyethylene film 6, organic glass post 7, nylon wire 8, high-voltage conducting wires 9 and target glass 10 are formed, cellular board 1 sticks on the face of circuit board 2, being printed on another side and the Mylar film 3 of reading bar 11 on the circuit board 2 pastes, Mylar film 3 is pasted together with carbon film 4, electrode glass 5 is pasted on the carbon film 4, the another side of top electrode glass 5 sticks layer of polyethylene film 6, be symmetrical on the top-bottom electrode structures, also have five blocks of target glass 10 up and down between the two cube electrode glass 5, paste layer of polyethylene film 6 on every block of target glass 10 face down, be that the nylon wire 8 of 0.22mm separates between electrode glass 5 and the target glass 10 and between the adjacent target glass 10 by diameter, be fixed with organic glass post 7 around the electrode glass, high-voltage conducting wires 9 is welded on the carbon film 4.All be printed on six on the upper and lower circuit plate 2 and read bar 11, so detector comprises six little detectors.
This detector operation gas is mixed by 95% F134a and 5% isobutane.When on high-voltage conducting wires, adding positive or negative high voltage, just set up highfield at detector.Because the polyethylene film that posts on glass, secondary proton is got in incident neutron and polyethylene film effect, and proton ionization working gas produces snowslide and amplifies, and induces signal on the bar reading of circuit board like this.The positive high voltage end induces negative signal, and negative high-voltage end induces positive signal.Because the gap between the electrode glass has only 0.22mm, so this detector has good time resolution performance, and fast neutron is had very high detection efficiency.Has very high neutron gamma resolution characteristic simultaneously.This detector can be used for neutron spectrum and measures neutron imaging, pulsed neutron intensity diagnosis etc.
Claims (4)
1. novel fast neutron detector, it is characterized in that, described fast neutron detector is by cellular board (1), circuit board (2), Mylar film (3), carbon film (4), electrode glass (5), polyethylene film (6), organic glass post (7), nylon wire (8), high-voltage conducting wires (9) and target glass (10) are formed, cellular board (1) sticks on the face of circuit board (2), it is bonding to be printed on another side and the Mylar film (3) of reading bar (11) on the circuit board (2), Mylar film (3) is pasted together with carbon film (4) again, electrode glass (5) sticks on the carbon film (4), the another side of top electrode glass (5) sticks the layer of polyethylene film, be symmetrical on the top-bottom electrode structures, also have 3～5 blocks of target glass (10) up and down between the two cube electrode glass (5), paste the layer of polyethylene film on every block of target glass (10) face down, be that the nylon wire (8) of 0.2～0.3mm separates between electrode glass (5) and the target glass (10) and between the adjacent target glass (10) by diameter, be fixed with organic glass post (7) around the electrode glass, high-voltage conducting wires (9) is welded on the carbon film (4).
2. according to the described a kind of novel fast neutron detector of claim 1, it is characterized in that the thickness of described polyethylene film is 0.1～0.3mm.
3. according to the described a kind of novel fast neutron detector of claim 1, it is characterized in that, be printed on 5～8 on the described circuit board (2) and read bar (11).
4. according to the described a kind of novel fast neutron detector of claim 1, it is characterized in that the working gas of described fast neutron detector is 95% F134a and 5% isobutane mixed gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102255052A CN101403766A (en) | 2008-11-03 | 2008-11-03 | Novel fast neutron detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102255052A CN101403766A (en) | 2008-11-03 | 2008-11-03 | Novel fast neutron detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101403766A true CN101403766A (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102255052A Pending CN101403766A (en) | 2008-11-03 | 2008-11-03 | Novel fast neutron detector |
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| Country | Link |
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| CN (1) | CN101403766A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956280A (en) * | 2012-10-29 | 2013-03-06 | 上海交通大学 | Preparation method of coded aperture for neutron penumbra imaging |
| CN103308937A (en) * | 2013-06-26 | 2013-09-18 | 清华大学 | Two-dimensional-read high-position high-time-resolution detector |
| CN104483699A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Resistive board chamber detector |
| CN104614755A (en) * | 2015-01-06 | 2015-05-13 | 清华大学 | High-counting-rate multi-gap resistive plate chamber detector |
-
2008
- 2008-11-03 CN CNA2008102255052A patent/CN101403766A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956280A (en) * | 2012-10-29 | 2013-03-06 | 上海交通大学 | Preparation method of coded aperture for neutron penumbra imaging |
| CN102956280B (en) * | 2012-10-29 | 2015-01-14 | 上海交通大学 | Preparation method of coded aperture for neutron penumbra imaging |
| CN103308937A (en) * | 2013-06-26 | 2013-09-18 | 清华大学 | Two-dimensional-read high-position high-time-resolution detector |
| CN104483699A (en) * | 2014-12-31 | 2015-04-01 | 清华大学 | Resistive board chamber detector |
| CN104483699B (en) * | 2014-12-31 | 2017-12-19 | 清华大学 | Resistive plate room detector |
| CN104614755A (en) * | 2015-01-06 | 2015-05-13 | 清华大学 | High-counting-rate multi-gap resistive plate chamber detector |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20090408 |