CN203084205U - PMT type X-ray detector with adjustable luminous flux - Google Patents
PMT type X-ray detector with adjustable luminous flux Download PDFInfo
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- CN203084205U CN203084205U CN 201320031625 CN201320031625U CN203084205U CN 203084205 U CN203084205 U CN 203084205U CN 201320031625 CN201320031625 CN 201320031625 CN 201320031625 U CN201320031625 U CN 201320031625U CN 203084205 U CN203084205 U CN 203084205U
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- pmt
- ray detector
- dimmer arrangement
- scintillator
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Abstract
The utility model relates to a PMT type X-ray detector with adjustable luminous flux. The PMT type X-ray detector comprises a detector protective sleeve, an antireflecting apparatus, a scintillator and a photomultiplier, wherein the antireflecting apparatus, the scintillator and the photomultiplier are sequentially arranged in the detector protective sleeve. The PMT type X-ray detector obtains the optimal luminous flux of the detector based on on-site on-line modulation.
Description
Technical field
The utility model relates to the X-ray detector technical field, particularly relates to a kind of PMT(photomultiplier of tunable optical flux) the formula X-ray detector.
Background technology
PMT formula X-ray detector is in many industry widespread uses such as industrial instrumentation, medical applications, high-energy physics.As everybody knows, the incident flux of PMT too hour, dark current and marking current are comparable, measure output signal-to-noise ratio and obviously descend; When luminous flux is too big, PMT fatiguability, the aging quickening, even damage.And when normally using, PMT also can slowly wear out, and causes exporting the decay of photocurrent.
Existing P MT formula X-ray detector design between PMT and scintillator built-in fluorescence light damping plate to regulate the incident flux of PMT, have following drawback: this detector versatility is not strong, the x-ray source of varying strength need adopt different fluorescence light damping plates and can only realize that the user can not adjust in detector manufacturing plant; Detector can not use after wearing out to a certain degree with PMT, and serviceable life is not long.
The utility model content
Technical problem to be solved in the utility model provides a kind of PMT formula X-ray detector of tunable optical flux, can make things convenient for the user to obtain the optimal light flux of detector according to the online adjustment in scene.
The technical scheme that its technical matters that solves the utility model adopts is: the PMT formula X-ray detector that a kind of tunable optical flux is provided; comprise detector protective sleeve, dimmer arrangement, scintillator and photomultiplier, described dimmer arrangement, scintillator and photomultiplier are successively set in the described detector protective sleeve.
Described dimmer arrangement is made up of one to four blocks dim light steel plate, also can use the dim light steel plate more than four to form.
Described dim light steel plate is common carbon steel board or other alloy-steel plates.
When described dimmer arrangement was made up of four blocks of dim light steel plates, described four dim light steel plate preferred thickness were respectively 0.1mm, 0.2mm, 0.4mm and 0.8mm.
Beneficial effect
Owing to adopted above-mentioned technical scheme, the utility model compared with prior art has following advantage and good effect: 1) adopt the highly versatile of the detector of the technical program, adapt to various intensity x-ray sources; 2) dimmer arrangement of the combination by light damping plate, PMT incident flux are convenient to the user and are adjusted, and calculate without complexity theory; 3) dimmer arrangement is external outside scintillator, and it is repeatedly adjustable according to the aging rhythm of PMT to be convenient to the user, prolongs the serviceable life of detector, reduces a year use cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of weakener in the utility model;
Fig. 3 is to use the utility model to carry out the process flow diagram of light modulation.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment of the present utility model relates to a kind of PMT formula X-ray detector of tunable optical flux; as shown in Figure 1; comprise detector protective sleeve 4, dimmer arrangement 1, scintillator 2 and photomultiplier 3, described dimmer arrangement 1, scintillator 2 and photomultiplier 3 are successively set in the described detector protective sleeve 4.
Detector of the present utility model is equipped with light flux regulating device, it is dimmer arrangement, can make things convenient for the user to obtain the optimal light flux of detector, the especially adjustment when PMT is aging, compensate the PMT burn-in effects, keep the detector optimum Working, prolong at least one year of its serviceable life according to the online adjustment in scene.
Described dimmer arrangement 1 is made up of one to four blocks dim light steel plate.As shown in Figure 2, described dim light steel plate is common carbon steel board (Q235B or other common steel grade), and size can be regulated according to detector, covers the detector surveyed area, and ratio detection device protection overcoat is smaller.
When described dimmer arrangement 1 was made up of four blocks of dim light steel plates, the thickness of described four blocks of dim light steel plates was respectively 0.1mm, 0.2mm, 0.4mm and 0.8mm, and by different thickness combinations, dimmer arrangement can be 16 kinds of thickness of 0.1mm, 0.2mm...1.5mm or the like.The purpose of debugging is by the combination of one or more weakener, and the energy of the X ray of detector is incided in decay, obtains the optimal light flux (at this moment, the PMT maximum operating voltage is between 500VDC ~ 600VDC) of PMT.
As shown in Figure 3, optimal light flux method of adjustment key step of the present utility model comprises:
1) the dimmer arrangement Position Design is determined: general dimmer arrangement design is used to the visible light of decaying between scintillator and photomultiplier.This design dimmer arrangement 1 is positioned at detector protective sleeve 4, scintillator 2 (see figure 1) before, is used to the X ray of decaying.
2) manufacturing of X ray weakener: weakener comprises four standard thickness models (0.1mm, 0.2mm, 0.4mm, 0.8mm); material: straight carbon steel (Q235B or other common steel grade); size: adjustable according to detector size; cover the detector surveyed area, the smaller (see figure 2) of ratio detection device protection overcoat.
3) dimmer arrangement on-line debugging: the purpose of debugging is by the combination of one or more weakener, and the energy of the X ray of detector is incided in decay, obtains the optimal light flux (at this moment, the PMT maximum operating voltage is between 500VDC ~ 600VDC) of PMT.By different thickness combinations, dimmer arrangement can be 16 kinds of thickness of 0.1mm, 0.2mm...1.5mm or the like.
4) cyclic check/adjustment detector duty: check whether primary detector is in optimal light flux (be PMT maximum operating voltage whether between 500VDC ~ 600VDC) every half a year, reason be PMT can with the working time increase wear out, performance decline.If the detector maximum operating voltage surpasses 600VDC, then repeat the 3rd) step, adjust and obtain the optimal light flux.
PMT formula X-ray detector with hot rolling mill finish rolling outlet X-ray thickness gauge is an example, adopts the mode of existing adjusting luminous flux: built-in fluorescence light damping plate between PMT and scintillator.Along with wearing out of PMT, and incident flux can not be regulated, and causes being operated in optimum Working, and sensitivity decline, noise increase, and detector can not use.After adopting the detector of the utility model technology, by cyclic check, discovery PMT wears out and regulates incident flux easily according to its degree of aging, makes it remain on optimum Working always.Can not to regulate luminous flux be the repeatedly adjustable of new detector because of having changed former detector, prolonged serviceable life effectively.
Be not difficult to find, adopt the highly versatile of the detector of the technical program, adapt to various intensity x-ray sources, and pass through the dimmer arrangement of the combination of light damping plate, the PMT incident flux is convenient to user's adjustment, calculates without complexity theory.Dimmer arrangement is external outside scintillator, and it is repeatedly adjustable according to the aging rhythm of PMT to be convenient to the user, prolongs the serviceable life of detector, reduces a year use cost.
Claims (4)
1. the PMT formula X-ray detector of a tunable optical flux; comprise detector protective sleeve (4), dimmer arrangement (1), scintillator (2) and photomultiplier (3); it is characterized in that described dimmer arrangement (1), scintillator (2) and photomultiplier (3) are successively set in the described detector protective sleeve (4).
2. the PMT formula X-ray detector of tunable optical flux according to claim 1 is characterized in that, described dimmer arrangement (1) is made up of one to four blocks dim light steel plate.
3. the PMT formula X-ray detector of tunable optical flux according to claim 2 is characterized in that described dim light steel plate is a common carbon steel board.
4. the PMT formula X-ray detector of tunable optical flux according to claim 2 is characterized in that, when described dimmer arrangement (1) was made up of four blocks of dim light steel plates, the thickness of described four blocks of dim light steel plates was respectively 0.1mm, 0.2mm, 0.4mm and 0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031625 CN203084205U (en) | 2013-01-21 | 2013-01-21 | PMT type X-ray detector with adjustable luminous flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320031625 CN203084205U (en) | 2013-01-21 | 2013-01-21 | PMT type X-ray detector with adjustable luminous flux |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203084205U true CN203084205U (en) | 2013-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320031625 Expired - Fee Related CN203084205U (en) | 2013-01-21 | 2013-01-21 | PMT type X-ray detector with adjustable luminous flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203084205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425269A (en) * | 2015-12-09 | 2016-03-23 | 西北核技术研究所 | X-ray energy fluence measuring device |
-
2013
- 2013-01-21 CN CN 201320031625 patent/CN203084205U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425269A (en) * | 2015-12-09 | 2016-03-23 | 西北核技术研究所 | X-ray energy fluence measuring device |
| CN105425269B (en) * | 2015-12-09 | 2018-02-09 | 西北核技术研究所 | X-ray energy fluence measurement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20160121 |
|
| EXPY | Termination of patent right or utility model |