CN201449977U - Photomultiplier tube linear parameter debugging device - Google Patents
Photomultiplier tube linear parameter debugging device Download PDFInfo
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- CN201449977U CN201449977U CN2009200334740U CN200920033474U CN201449977U CN 201449977 U CN201449977 U CN 201449977U CN 2009200334740 U CN2009200334740 U CN 2009200334740U CN 200920033474 U CN200920033474 U CN 200920033474U CN 201449977 U CN201449977 U CN 201449977U
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Abstract
The utility model relates to a photomultiplier tube linear parameter debugging device, which comprises a working black box, a regulating box, a plurality of digital panel meters, a plurality of precision wire-wound multi-turn potentiometers and a plurality of cable transfer ports, wherein the plurality of digital panel meters and the plurality of precision wire-wound multi-turn potentiometers are arranged on the regulating box, the plurality of cable transfer ports are disposed on the working black box used for placing a photomultiplier tube needed by debugging, and a high-voltage power source unit, a voltage sampling module, a data acquisition card, a data output port and a low-voltage direct-current power source module are arranged on the regulating box; the high-voltage power source unit is used for independently supplying stable working voltage to each multiplier stage of the photomultiplier tube, the voltage sampling module and the data acquisition card are used for sampling output voltage of a high-voltage power source, the data output port is used for connecting the data acquisition card with a computer, and the lower-voltage direct-current power source module is used for supplying power to the high-voltage power source unit, the voltage sampling module and the data acquisition card. The photomultiplier tube linear parameter debugging device solves the technical problems that voltage regulation in the prior art is cumbersome, not easy to be controlled and lack of universally used techniques, realizes regulating the working voltage of each multiplier stage stably and independently, and has the advantages of being visual and easy to be controlled.
Description
Technical field
The utility model relates to photomultiplier performance parameter debugging apparatus, relates in particular to photomultiplier linear dimensions debugging apparatus.
Background technology
Photomultiplier is based on the vacuum device of external photoelectric effect principle, and it is widely used in the low-light-level measurement field as electrooptical device.Every photomultiplier is except that the canonical parameter characteristic that satisfies design, the user can also be according to the needs of oneself, by regulating the operating voltage relations of distribution of each dynode of photomultiplier, obtain different dividing potential drop ratios, to realize the Application and Development different to photomultiplier.
, be applied in the impulse radiation field measurement as the high sensitivity scintillation detector that electrooptical device constitutes by photomultiplier, the linear output of its maximum impulse has determined the detector sensitivity upper limit.The linear characteristic of photomultiplier becomes the important parameter of experimental applications.Need finish debugging by the debugging apparatus of special use, to satisfy application demand to this parameter.
At present, known photomultiplier linear dimensions debugging, be to become potentiometer for dynode provides the divider resistance changing-over in the fixed potentiometer of voltage, size by the regulator potentiometer resistance, thereby regulate the voltage distribution ratio of certain several important dynode, realize the simple debugging of the linear output size of photomultiplier pulse.
The existing way that the resistance on the fixed potentiometer is changed into potentiometer debugging linear dimensions that adopts, it has following shortcoming:
The one, potentiometer exists device self material structure and the restriction of device nominal value, the debugging that makes single electrode voltage distribute is limited in scope, if certain dynode needs, accurately to adjust the dividing potential drop ratio on a large scale, then the potentiometer of different resistances to be concatenated into this utmost point, doing has like this increased the debugging link.
The 2nd, adopt potentiometer debugging linear dimensions, press the variation of potentiometer resistance along with certain fraction, dividing potential drop ratio on the fixed potentiometer changes, when the total work high pressure that requires to control voltage divider is constant, the variation of divider resistance value can cause the variation of dividing potential drop loop current, because the multiplication output current and the anode current direction of dividing potential drop loop current and each dynode are opposite, the variation of dividing potential drop loop current will influence the size of dynode output current and anode current, become uppity operation so simple employing is changed to potentiometer debugging linearity with fixed resistance.
The 3rd, the use of fixed potentiometer makes voltage divider provide operating voltage for the photomultiplier with identical progression, does not have a versatility.
Summary of the invention
The purpose of this utility model provides a kind of photomultiplier linear dimensions debugging apparatus, and it has overcome the technical problem that voltage-regulation in the prior art is loaded down with trivial details, wayward and lack versatility.
Technical solution of the present utility model is:
A kind of photomultiplier linear dimensions debugging apparatus, its special character is: it comprises work camera bellows, regulating box, be arranged on a plurality of digital panel meters and a plurality of accurate wire-wound multiturn potentiometer on the regulating box, be arranged on a plurality of cable transit ports that photomultiplier is debugged required high pressure and current signal output that are used on the work camera bellows; Described work camera bellows is used to place the required photomultiplier of debugging, the voltage sample module that each dynode that promising photomultiplier is set in the described regulating box independently provides the high voltage source unit of stable operating voltage, take a sample for the high voltage source output voltage with data collecting card, be used to be connected the data-out port of data collecting card and computer and the low-voltage DC source module that can power to high voltage source unit, voltage sample module and data collecting card; Described high voltage source unit comprises a plurality of high-voltage power modules, described a plurality of accurate wire-wound multiturn potentiometer and high-voltage power module connect one to one, described voltage acquisition module is connected respectively with a plurality of high-voltage power modules, and described data collecting card is connected with voltage acquisition module.
The output of a plurality of high-voltage power modules of above-mentioned high voltage source unit is respectively drawn 3 groups of output lines, and the quantity of described digital panel meter is identical with high-voltage power module quantity, and described cable transit ports is 3 group interfaces.
Two groups in 3 groups of output lines of above-mentioned high voltage source unit link to each other with the voltage divider of photomultiplier respectively, its another winding voltage detecting port.
Above-mentioned data collecting card is the ADAM series data acquisition module of polylith parallel connection, and described data-out port comprises modular converter and the RS232 output interface that RS485 is converted to RS232.
Above-mentioned work camera bellows is arranged on the top of regulating box.
Technique effect of the present utility model is:
1, the utility model has been realized the operating voltage of stable each dynode of independent regulation, and each step voltage adjustable extent is big, and in the practical application, the function of this device has realized the photomultiplier range of linearity than not increased the debug results more than ten times before the debugging.
2, visual, easily control.The utilization high-voltage power module independently provides operating voltage for each dynode of photomultiplier, the voltage output excursion of module is realized regulating continuously by external precision potentiometer, directly show magnitudes of voltage at different levels by digital panel meter, computer real-time is carried out voltage data collections at different levels, makes debugging operation link directly perceived, simple and direct.
3, the utility model is operated in negative high voltage for photomultiplier, and the performance parameter debugging of the photomultiplier that progression is different has versatility.
Description of drawings
Fig. 1 is the utility model high-voltage power module and measures the demonstration schematic diagram;
Fig. 2 is the utility model internal structure schematic diagram;
Fig. 3 is the utility model apparatus structure schematic diagram;
Wherein: the standby high-voltage power module of 0-, 1～17-high-voltage power module, the standby output capacitance of 18-, 19～35-output capacitance, 36-voltage acquisition module, 37-data collecting card, 38-digital voltmeter 5V power supply, 39-high-voltage power module 24V dc-input power, 40-data-out port, 41-cable transit ports, 42-digital panel meter, 43-voltage detecting port, 44-high-pressure modular output line, the 45-camera bellows of working, the 46-regulating box, the 47-photomultiplier, C-exports external capacitor, V
0～V
17-digital panel meter, R
W0～R
W17-accurate wire-wound multiturn potentiometer.
Embodiment
The utility model photomultiplier linear dimensions debugging apparatus, comprise work camera bellows, regulating box, be arranged on 17 digital panel meters and 17 accurate wire-wound multiturn potentiometers on the regulating box, be arranged on and be used for 3 groups of required cable transit ports of photomultiplier debugging on the work camera bellows, its mesohigh transit ports is to be the cable converting interface that is provided with for the photomultiplier output signal for standard pipe provides cable converting interface, the signal converting port of operating voltage; The work camera bellows is arranged on the top of regulating box. the work camera bellows can be placed debugging required photomultiplier, light source, optical element, optical bench, the voltage sample module that each dynode that promising photomultiplier is set in the regulating box independently provides the high voltage source unit of stable operating voltage, take a sample for the high voltage source output voltage with data collecting card, be used to be connected the data-out port of data collecting card and computer and the low-voltage DC source module that can power to high voltage source unit, voltage sample module and data collecting card; The high voltage source unit comprises 18 high-voltage power modules (comprising 1 group of standby high-voltage power module), 17 accurate wire-wound multiturn potentiometers and 17 high-voltage power modules connect one to one, voltage acquisition module is connected respectively with 17 high-voltage power modules, data collecting card is connected the output of .17 high-voltage power module and respectively draws 3 groups of output lines with voltage acquisition module, wherein two groups link to each other with the voltage divider of photomultiplier respectively, voltage detecting port on another winding regulating box, be used for being connected with the external digital high pressure gauge, conveniently current potentials at different levels are inspected by random samples observation at any time. data collecting card is the ADAM series data acquisition module of polylith parallel connection, data-out port comprises modular converter and the RS232 output interface that RS485 is converted to RS232, the RS232 output interface is connected with computer input serial ports. and the data acquisition precision is that 12 A/D. voltage data test programs at different levels adopt VC to write, adopt window interface and drop-down menu and toolbar form to realize the man-machine communication, meet the operating habit of popular software.
The utility model utilization high-voltage power module independently provides stable operating voltage for each dynode of photomultiplier.High-voltage power module is widely used in the electronic system design with the advantage of its distinctive independence and flexibility.Module have the lasting accuracy height (time floats≤0.1%, temperature floats≤0.1%), startup and the overvoltage slowly of ripple little (＜0.05%), output voltage, overcurrent protection function.The output of module high pressure is regulated by external accurate wire-wound multiturn potentiometer, and the precision of accurate wire-wound multiturn potentiometer is 1%.Cooperate digital voltmeter by high-voltage power module, can be intuitively, regulate on a large scale for the dynode operating voltage quickly and easily, disassembling, assembling and replacing is convenient in the high-voltage power module design.After having determined total work voltage of photomultiplier, the voltage of photomultiplier dynode can finally need be implemented to regulate by the user in conjunction with the concrete grammar of linear parameter regulation in its voltage parameter adjustable range.
Owing to used the multichannel high-voltage power module, so device has versatility to the adjusting of the photomultiplier of different progression.
High-voltage power module model and index: DW-N602-2F, 24V--6000V/2mA; DW-N302-2F, 24V--3000V/5mA.
High-voltage power module provides the adjustment process of operating voltage as follows for photomultiplier:
At first open the work camera bellows, select the way of high-voltage output line, 1 group of selected high-voltage output line is soldered on the multiplier tube voltage divider metal connection post according to the progression of photomultiplier.Check that other 2 groups of high-voltage output lines connect situation, regulate two photomultipliers simultaneously, other 1 group of high-voltage output line also can be connected voltage divider as needs.With waiting that the multiplier tube of debugging linear dimensions is installed on the voltage divider, simultaneously a same model photomultiplier that is operated in the range of linearity also is placed into the relevant position as standard pipe, close the camera bellows bonnet, confirm that no stray light leaks into camera bellows.
Secondly, connect the power supply plug wire of device, confirm that apparatus housing ground connection is good, the accurate wirewound potential meter on the front panel is threaded to 0, perform the preparation that device is about to work.Voltage ratio parameter when its work total high pressure extreme value scope that provides with reference to the photomultiplier operation manuals and the pulsed operation situation of recommendation, determine the total work voltage range and the operating voltage range at different levels of photomultiplier earlier, opening power then, the regulator potentiometer knob is for each dynode provides its needed operating voltage.Utilization X-Y explicit representation, on oscilloscope, observe the linearity output situation of waiting to debug photomultiplier, by regulating the front panel potentiometer knob, change the size of high-voltage power module to the dynode power supply, operating voltage to each dynode is regulated step by step, the final linear output of pulse that realizes debugging photomultiplier maximum.
At last, when maximum impulse linear current value debugging finishes, the voltage data of each multiplier stage is outputed to serial ports of computers by the RS232 interface by data collecting card.Computer is by the real-time reading of data of serial ports, and useful parameter stored under the assigned catalogue, form an Excel file and a log text, data in the file thus, calculate the voltage ratio of corresponding maximum impulse linear current, finish the debugging of pulse linearity.
After having finished the linear dimensions debugging, can keep each high-voltage power module output valve constant, the time performance of photomultiplier is tested.At this moment, need first shutoff device power supply, open the camera bellows bonnet, the position and the p-wire of photomultiplier and light source when adjusting the Measuring Time performance, closed camera bellows again, confirm that no stray light enters camera bellows after, the device for opening power supply, be multiplier tube power supplies at different levels, the operate-time characteristic method of measurement is tested photomultiplier.
Claims (5)
1. photomultiplier linear dimensions debugging apparatus is characterized in that: it comprises work camera bellows, regulating box, be arranged on a plurality of digital panel meters and a plurality of accurate wire-wound multiturn potentiometer on the regulating box, be arranged on a plurality of cable transit ports that photomultiplier is debugged required high pressure and current signal output that are used on the work camera bellows; Described work camera bellows is used to place the required photomultiplier of debugging, the voltage sample module that each dynode that promising photomultiplier is set in the described regulating box independently provides the high voltage source unit of stable operating voltage, take a sample for the high voltage source output voltage with data collecting card, be used to be connected the data-out port of data collecting card and computer and the low-voltage DC source module that can power to high voltage source unit, voltage sample module and data collecting card; Described high voltage source unit comprises a plurality of high-voltage power modules, described a plurality of accurate wire-wound multiturn potentiometer and high-voltage power module connect one to one, described voltage acquisition module is connected respectively with a plurality of high-voltage power modules, and described data collecting card is connected with voltage acquisition module.
2. photomultiplier linear dimensions debugging apparatus according to claim 1, it is characterized in that: the output of a plurality of high-voltage power modules of described high voltage source unit is respectively drawn (3) group output line, the quantity of described digital panel meter is identical with high-voltage power module quantity, and described cable transit ports is (3) group interface.
3. photomultiplier linear dimensions debugging apparatus according to claim 2 is characterized in that: two groups in (3) group output line of described high voltage source unit link to each other its another winding voltage detecting port respectively with the voltage divider of photomultiplier.
4. according to claim 1 or 2 or 3 described photomultiplier linear dimensions debugging apparatus, it is characterized in that: described data collecting card is the ADAM series data acquisition module of polylith parallel connection, and described data-out port comprises modular converter and the RS232 output interface that RS485 is converted to RS232.
5. photomultiplier linear dimensions debugging apparatus according to claim 4, it is characterized in that: described work camera bellows is arranged on the top of regulating box.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200334740U CN201449977U (en) | 2009-06-09 | 2009-06-09 | Photomultiplier tube linear parameter debugging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200334740U CN201449977U (en) | 2009-06-09 | 2009-06-09 | Photomultiplier tube linear parameter debugging device |
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| CN2009200334740U Expired - Fee Related CN201449977U (en) | 2009-06-09 | 2009-06-09 | Photomultiplier tube linear parameter debugging device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467422A (en) * | 2014-09-12 | 2016-04-06 | 北京大基康明医疗设备有限公司 | Photomultiplier debugging device |
| CN106024570A (en) * | 2016-05-13 | 2016-10-12 | 上海联影医疗科技有限公司 | PMT performance regulating method |
| CN109581476A (en) * | 2018-12-19 | 2019-04-05 | 广东工业大学 | A kind of power-supply management system |
| CN114527237A (en) * | 2022-01-14 | 2022-05-24 | 陕西卫峰核电子有限公司 | Method and system for improving detection upper limit of inert gas |
-
2009
- 2009-06-09 CN CN2009200334740U patent/CN201449977U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105467422A (en) * | 2014-09-12 | 2016-04-06 | 北京大基康明医疗设备有限公司 | Photomultiplier debugging device |
| CN106024570A (en) * | 2016-05-13 | 2016-10-12 | 上海联影医疗科技有限公司 | PMT performance regulating method |
| CN106024570B (en) * | 2016-05-13 | 2018-02-27 | 上海联影医疗科技有限公司 | A kind of PMT property regulations method |
| CN109581476A (en) * | 2018-12-19 | 2019-04-05 | 广东工业大学 | A kind of power-supply management system |
| CN114527237A (en) * | 2022-01-14 | 2022-05-24 | 陕西卫峰核电子有限公司 | Method and system for improving detection upper limit of inert gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20120609 |