CN204203131U - There is the electron paramagnetic resonance probe of two Surface testing mouth - Google Patents
There is the electron paramagnetic resonance probe of two Surface testing mouth Download PDFInfo
- Publication number
- CN204203131U CN204203131U CN201420213314.5U CN201420213314U CN204203131U CN 204203131 U CN204203131 U CN 204203131U CN 201420213314 U CN201420213314 U CN 201420213314U CN 204203131 U CN204203131 U CN 204203131U
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- mouth
- probe
- sample
- detection mouth
- paramagnetic resonance
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- 239000000523 sample Substances 0.000 title claims abstract description 81
- 238000004435 EPR spectroscopy Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 title claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 38
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 230000005298 paramagnetic effect Effects 0.000 claims abstract description 10
- 230000005291 magnetic effect Effects 0.000 claims abstract description 8
- 230000003447 ipsilateral effect Effects 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000005408 paramagnetism Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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Abstract
This utility model relates to a kind of electron paramagnetic resonance probe with two Surface testing mouth.This probe profile and inner chamber are rectangle, and mode of resonance is TE101 type, are provided with the main sample detection mouth of open polygon at side opening, are provided with less scale sample detection mouth in another side.A pair coil providing modulated magnetic field is placed in probe both sides, and this coil is detecting the modulated magnetic field needed for the generation paramagnetic resonance of mouth position.Coupling adopts the coupling iris with coupling aperture to be coupled with tuned cell, regulates the coupling constant of cavity and microwave system with the allotment bolt outside coupling aperture.The utility model is mainly used in sample standard scale sample and be inconvenient to simultaneously and the sample of sample preparation carries out local detection, and can reduce Instrument working state affects signal intensity, the accuracy of lifting dose-effect analysis.
Description
Technical field
The utility model relates to a kind of electron paramagnetic resonance probe with two Surface testing mouth carrying scale.This probe internal resonance chamber is operated in X-band rectangle TE101 pattern, and probe bore and shell principal shape are rectangle.This electron paramagnetic resonance probe has scale sample detection mouth and two, main sample detection mouth to detect mouth, be respectively used to obtain simultaneously demarcation scale sample signal and to being inconvenient to sample and direct-detection is carried out on the testing sample surface of sample preparation, art is New Biophysical Techniques and new method.
Background technology
Electron paramagnetic resonance (be called for short EPR) is a kind of technology, the content at the paramagnetism center such as free radical, transition metal, lattice imperfection can contained in amalyzing substances and character.Therefore EPR is widely used in many fields such as physics, chemistry, geology, archaeology, material science and biomedicine.
The pick-up unit of general EPR spectrometer mostly is sample and inserts type resonator cavity, has larger restriction to the shape of sample and volume.The design of open type resonator cavity to some extent solves this problem, but in EPR research, the selection (such as microwave power and modulation amplitude) of operating conditions and spectrometer duty etc. all can have a strong impact on dose-effect relationship accuracy, for head it off, the utility model devises the two detection mouth EPR resonator cavitys carrying scale.
The utility model is on the basis of resonator cavity can implementing chamber external pelivimetry, turn increase a scale sample detection mouth, for measuring the scale sample of demarcation, therefore the EPR spectral line with scale sample signal can be obtained, thus the impact of spectrometer duty when can reduce measurement, comparatively significantly promote the accuracy measured when sample size effect relationship is analyzed.
Summary of the invention
The utility model provides the probe having two Surface testing mouth electron paramagnetic resonance and measure, and pop one's head in by microwave cavity, sample detection mouth, scale sample detection mouth and tuningly to form with coupling device, wherein microwave cavity is operated in rectangle TE101 pattern.Concrete scheme is as follows: probing shell 7 profile is rectangle, edge's fillet process, and length is less than 30 millimeters, and width is less than 18 millimeters, is highly less than 30 millimeters, housing wall thickness 1 ~ 2 millimeter.Internal cavity is the rectangular cavities having fillet.Be provided with main sample detection mouth 8 at the side opening of housing 7, detect mouth and be positioned at probe center side position or close center.Detect opening's edge wall thickness direction longitudinally through to inner microwave cavity space, the field in microwave cavity can be leaked by detecting mouth.In order to advantageously in the placement of sample and the applying of modulated Field, this detection mouth is in open polygon.Detect mouth and be through to internal resonance cavity space, being rectangle with inner chamber intersection, is trapezoidal with probing shell intersection.Probe Width is run through on this long limit of detection mouth, with cavity consistency of thickness; Minor face width is 3 ~ 8 millimeters, is 1/5 ~ 1/20 of cavity lateral width.This long limit and microwave magnetic field component in resonator cavity detecting mouth is vertical and parallel with this current line direction, place on the wall of chamber in the direction at this place.A pair coil providing modulated magnetic field is placed in the both sides that resonator cavity detects mouth, and this coil produces the modulated magnetic field of the some strength needed for paramagnetic resonance detecting mouth position.Offer scale sample detection mouth 9 in the another side of housing 7, be positioned at center, cavity side or close center, but from main sample detection mouth in different sides, chamber.Scale sample detection is young in main sample detection mouth, and wall position, chamber is in open polygon.The base 6 of probe utilizes screw to be connected with tuned cell 2 and coupling piece 11 with coupling by screw.Coupling utilizes the coupling iris 11 with coupling aperture 10 to be coupled with tuned cell and microwave cavity, and its thickness is less than 0.5 millimeter, in addition coupling piece also has the hole 5 of assembling.Coupling and tuned cell 2 are regulated by the tuning bolt 1 pair of coupling constant be arranged on outside coupling aperture, and coupling bolts top is with tuning nail 12.Opposite side and the waveguide of coupling unit utilize screw to be connected by screw 13, and are connected to spectrometer microwave bridge unit by waveguide, this external coupler carry out in addition hole 3 and the hole 4 of assembling.The intermetallic composite coating making that probe one-piece construction electric conductivity is good, electroplate or gold improve electric conductivity.
This probe, after the microwave loading characteristic frequency, can produce microwave resonance in microwave cavity internal excitation.By particular design mode of resonance and pair detection mouth position and size, make two to detect mouth and can cut the position that in chamber, microwave magnetic field component is concentrated, avoid microwave electric field component comparatively concentrated position in chamber simultaneously, and two detection mouths are distant, interact little, make resonance quality factor without greater loss, thus ensure that measurement sensistivity.
By the type of sample in adjustment scale sample detection mouth, concentration and quality, marking signal spectral line superposing fixed position, intensity can be obtained at one-shot measurement, this signal can be used for improving the accuracy of signal analysis, and the sample especially determined shape, difficult quality carries out the accuracy of dose-effect analysis.
The utility model can be implemented paramagnetic resonance and detects being inconvenient to destroy one-piece construction or the larger sample of being inconvenient to insert intra resonant cavity of volume outside chamber, substitute fossil sample or the rare sample of geological research is determined as engaged in archaeological studies, measuring at body EPR especially for people's tooth, to realize the quick estimation of radiation dose.The design of scale sample detection mouth, making this chamber can implement the measurement of two samples simultaneously, by carrying out scale setting to a sample, can improve dose-effect precision of analysis.
Accompanying drawing explanation
Fig. 1 is that the utility model electron paramagnetic resonance resonance probe implements structural representation.
1 is tuning bolt; 2 is coupling and tuned cell; 3,4,5,13 is pilot hole; 6 is base; 7 is housing; 8 is main sample detection mouth; 9 is scale sample detection mouth; 10 is coupling aperture; 11 is coupling iris; 12 is tuning nail.
Embodiment
In probe, microwave cavity length is 22.86 millimeters, and width is 10.16 millimeters, is highly 21.40 millimeters, and structural walls thickness is 1.50 millimeters, and structured material is copper, electroplate.Sample detection mouth rectangle longitudinal openings place width is 3 millimeters, is 2 millimeters deeply, and open trapezoidal broadside is 6 millimeters.The longitudinal openings place of scale sample detection mouth rectangle is cylindrical, and diameter 1 millimeter, is 0.5 millimeter deeply, and open trapezoidal broadside is 4 millimeters.Modulation coil is fixed on and detects 5cm place outside mouth center, applies 100K hertz modulating current.Be connected with the microwave system of waveguide with Bruker-A300 type paramagnetic resonance spectrometer with tuned cell by coupling by this probe, microwave resonance frequency is 9.5G hertz, and in chamber, microwave field pattern is rectangle TE101 type.Practical application effect is as follows: the human teeth's sample (being placed in sample detection mouth) utilizing probe of the present invention simultaneously Mn2+ scale sample (being placed in scale sample detection mouth) and gamma-ray irradiation, can detect nonoverlapping epr signal simultaneously.
Claims (7)
1. an electron paramagnetic resonance probe with two Surface testing mouth, is characterized in that the main sample detection mouth (8) that arranged by microwave resonance cavity (7), coupling and tuned cell (2), side of popping one's head in and scale sample detection mouth (9) form.
2. paramagnetic resonance probe according to claim 1, is characterized in that described probe internal resonance chamber and profile main body are rectangle.
3. paramagnetic resonance according to claim 1 probe, is characterized in that described probe side arranges the main sample detection mouth of polygon, is used for the outer sample of test chamber; Detect mouth and be through to internal resonance cavity space, detection mouth and inner chamber intersection are rectangle, are trapezoidal with probing shell wall intersection.
4. paramagnetic resonance according to claim 1 probe, it is characterized in that described probe side opening is provided with scale sample detection mouth, this detections is young in main sample detection mouth, with main sample detection mouth at not ipsilateral, surveyors' staff sample signal while of being used for.
5. paramagnetic resonance probe according to claim 1, it is characterized in that described two detection mouths are positioned at chamber center side or close center, detect the long limit of mouth vertical with microwave magnetic field in resonator cavity and be parallel to chamber surface current, affect less on microwave attenuation in chamber.
6. paramagnetic resonance probe according to claim 1, is characterized in that described probe utilizes the coil outside a pair chamber to provide modulated magnetic field.
7. paramagnetic resonance probe according to claim 1, it is characterized in that the main long limit of sample detection mouth and cavity consistency of thickness, short side dimension is 1/3 ~ 1/20 of cavity side; The long limit of scale sample detection mouth and cavity consistency of thickness, short side dimension is 1/5 ~ 1/20 of cavity side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420213314.5U CN204203131U (en) | 2014-04-28 | 2014-04-28 | There is the electron paramagnetic resonance probe of two Surface testing mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420213314.5U CN204203131U (en) | 2014-04-28 | 2014-04-28 | There is the electron paramagnetic resonance probe of two Surface testing mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204203131U true CN204203131U (en) | 2015-03-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420213314.5U Expired - Lifetime CN204203131U (en) | 2014-04-28 | 2014-04-28 | There is the electron paramagnetic resonance probe of two Surface testing mouth |
Country Status (1)
| Country | Link |
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| CN (1) | CN204203131U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114079137A (en) * | 2020-08-12 | 2022-02-22 | 布鲁克碧奥斯平有限公司 | Microwave coupling device for iris aperture comprising a plurality of conductor loops |
-
2014
- 2014-04-28 CN CN201420213314.5U patent/CN204203131U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114079137A (en) * | 2020-08-12 | 2022-02-22 | 布鲁克碧奥斯平有限公司 | Microwave coupling device for iris aperture comprising a plurality of conductor loops |
| US11914010B2 (en) | 2020-08-12 | 2024-02-27 | Bruker Biospin Gmbh | Microwave coupling device for iris apertures, comprising a plurality of conductor loops |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150311 |