CN107907904A - A kind of circuit and method for improving operating point measurement sensitivity - Google Patents
A kind of circuit and method for improving operating point measurement sensitivity Download PDFInfo
- Publication number
- CN107907904A CN107907904A CN201711104978.2A CN201711104978A CN107907904A CN 107907904 A CN107907904 A CN 107907904A CN 201711104978 A CN201711104978 A CN 201711104978A CN 107907904 A CN107907904 A CN 107907904A
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- Prior art keywords
- operating point
- circuit
- output terminal
- point measurement
- measurement sensitivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
Abstract
The invention discloses a kind of circuit and method for improving operating point measurement sensitivity, interlock circuit includes：Beam position detector, envelope detection circuit, ac-coupled device, high resistant difference amplifier, notch filter and bandpass filter；Wherein：The two-way output terminal of the beam position detector connects an envelope detection circuit respectively, each envelope detection circuit output terminal connects an ac-coupled device respectively, the reverse input end and positive output terminal of the corresponding connection high resistant difference amplifier of output terminal of two ac-coupled devices, the output terminal connection notch filter of high resistant difference amplifier, the output terminal connection bandpass filter of notch filter.Program principle is simple, and circuit structure is easily built, and compared with conventional operating point measuring method, the detection sensitivity of work dot frequency can be greatly improved, and is particularly suitable for the real-time detection of operating point and parameter feedback in synchrotron radiation light source electronic storage ring.
Description
Technical field
The present invention relates to charged particle accelerator technical field, more particularly to a kind of electricity for improving operating point measurement sensitivity
Road and method.
Background technology
Operating point is one of most important parameter of synchrotron radiation light source electronic storage ring.In conventional measuring method, usually
Certain excitation, which must be applied, to storage line could effectively detect operating point, and the disturbance to line causes operating point measurement to exist
It is limited by very large in.The limit diffraction storage rings proposed in recent years are state-of-the-art synchrotron radiation light sources, it is sent out
Usually in tens micromicron radians, Beam orbit stability usually requires that obvious small in hundred nanometer scales, Dynamic Aperture etc. degree of penetrating
In three generations's light source.Therefore, it is compeling for light source of new generation to reduce the disturbance in the measurement process of operating point to storage line as far as possible
It is essential and asks, it is the current effective way realized and reduce the influence to line to improve operating point measurement sensitivity, and can effectively be extended
The application of operating point measurement, such as the detection of real-time working point and feedback, radio frequency are detected and fed back in real time, still, are not had also at present
There is more effective scheme.
The content of the invention
The object of the present invention is to provide a kind of circuit and method for improving operating point measurement sensitivity, work can be effectively improved
Make the detection sensitivity of point, so as to solve the adverse effect for needing halved tie stream to carry out disturbance measurement in existing e measurement technology.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of circuit for improving operating point measurement sensitivity, including：Beam position detector, envelope detection circuit, exchange
Coupler, high resistant difference amplifier, notch filter and bandpass filter；Wherein：
The two-way output terminal of the beam position detector connects an envelope detection circuit, each envelope detection circuit respectively
Output terminal connects an ac-coupled device, the corresponding connection high resistant difference amplifier of output terminal of two ac-coupled devices respectively
Reverse input end and positive output terminal, the output terminal connection notch filter of high resistant difference amplifier, notch filter it is defeated
Outlet connects bandpass filter.
A kind of method for improving operating point measurement sensitivity, including：Beam current signal is coupled using beam position detector, it is defeated
The two-way coupling beam current signal gone out carries out detection processing by an envelope detection circuit respectively, after the two-way detection processing of acquisition
Comparative electrode signal is defeated to the reverse input end and forward direction of high resistant difference amplifier through the corresponding input of an ac-coupled device respectively
Outlet, finally passes sequentially through the signal after the subtraction that notch filter exports high resistant difference amplifier with bandpass filter
It is filtered processing.
As seen from the above technical solution provided by the invention, solution principle is simple, and circuit structure is easily built, and normal
The operating point measuring method of rule is compared, and the detection sensitivity of work dot frequency can be greatly improved, be particularly suitable for synchrotron radiation light
The real-time detection of operating point and parameter feedback in the electronic storage ring of source.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, without creative efforts, other can also be obtained according to these attached drawings
Attached drawing.
A kind of circuit diagram for raising operating point measurement sensitivity that Fig. 1 is provided by the embodiment of the present invention；
The envelope detection schematic diagram based on diode detection that Fig. 2 is provided by the embodiment of the present invention；
The schematic diagram for the high resistant difference amplifier that Fig. 3 is provided by the embodiment of the present invention；
The circuit diagram for the notch filter that Fig. 4 is provided by the embodiment of the present invention；
The notch filter amplitude-frequency response that Fig. 5 is provided by the embodiment of the present invention；
The circuit diagram for the bandpass filter that Fig. 6 is provided by the embodiment of the present invention；
The bandpass filter amplitude-frequency response that Fig. 7 is provided by the embodiment of the present invention.
Embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, belongs to protection scope of the present invention.
In synchrotron radiation light source electronic storage ring, Tune Measurement System is its essential part.Work
Point is obtained by measuring line oscillator signal frequency spectrum, and common method is that direct collection beam current signal carries out spectrum analysis.Due to beam
Stream signal is burst pulse modulated signal, and main frequency component is cyclotron frequency in beam current signal, operating point frequency component accounting
It is very low, therefore line would generally be encouraged in real time, to increase operating point frequency component.The high sensitivity degree operating point of the present invention
The relatively conventional method of measuring method, is effectively improved signal detection sensitivity.
As shown in Figure 1, providing a kind of circuit for improving operating point measurement sensitivity for the embodiment of the present invention, it is mainly wrapped
Include：Beam position detector 1, envelope detection circuit 2, ac-coupled device 3, high resistant difference amplifier 4, notch filter 5 and band
Bandpass filter 6；Wherein：
The two-way output terminal of the beam position detector 1 connects an envelope detection circuit 2, each envelope detection electricity respectively
2 output terminal of road connects an ac-coupled device 3, the corresponding connection high resistant difference of output terminal of two ac-coupled devices 3 respectively
The reverse input end of amplifier 4 and positive output terminal, the output terminal connection notch filter 5 of high resistant difference amplifier 4, trap filter
The output terminal connection bandpass filter 6 of ripple device 5.
Afterwards, the signal that bandpass filter 6 exports will be fed into low-noise amplifier and carry out pre-amplification, and the signal of pre-amplification is most
ADC is sent into afterwards is digitized processing.
In the embodiment of the present invention, the beam position detector can be by a pair of of comparative electrode or 4 axisymmetric electrode groups
Into.A pair of of comparative electrode can be used for the beam position vibration of one in-plane of measurement, and 4 axisymmetric electrodes can be used for surveying
Measure the beam position vibration of orthogonal both direction.
In the embodiment of the present invention, detection processing, the envelope are carried out to the beam current signal of coupling using envelope detection technique
Detecting circuit is realized by diode detection circuit or triode detection circuit.Exemplary, as shown in Figure 2 two can be used
Pole pipe detecting circuit, as shown in Fig. 2, R1 is input build-out resistor, selects the Chip-R that resistance value is 50 ohm, D1, R2 and C1
The work dot frequency detected as needed makes choice.Assuming that the work dot frequency for needing to detect is horizontal direction 2.036MHz,
The Chip-R of vertical direction 1.622MHz, then D1 selections HSMS-2805, R2 1000 ohm of resistance values of selection, C1 selections capacitance are
The patch capacitor of 510 pico farads, can be calculated detecting circuit damping time constant t=0.51 microseconds.
In the embodiment of the present invention, the ac-coupled device can be realized by serial capacitance device.
In the embodiment of the present invention, in order to reduce the influence to detecting circuit, the input resistance of difference amplifier is improved as far as possible
It is anti-, therefore high resistant difference amplifier can be the calculus of differences unit of instrument amplifier type.Exemplary, model can be selected
For the instrument amplifier integrated circuit of AD8429, as shown in figure 3, gain resistor R1 can select 6000 ohm chip of resistance value electric
Resistance.
In the embodiment of the present invention, cyclotron frequency and harmonic wave are filtered out by notch filter and bandpass filter respectively
Component, effectively improves the power component of operating point frequency signal.
In the embodiment of the present invention, notch filter can select double-T shaped trapper and active Chebyshev II types to filter
Device, as shown in figure 4, the working frequency of notch filter is 4.534MHz, its amplitude-frequency response is as shown in Figure 5.
In the embodiment of the present invention, bandpass filter can use 8 rank Butterworth mode filters, as shown in fig. 6, its amplitude-frequency
Response curve is as shown in fig. 7, centre frequency is 1.06MHz, three dB bandwidth 2MHz.
Based on such scheme, using Hefei light source electronic storage ring as platform, its higher frequency is 204MHz, and cyclotron frequency is
4.534MHz, strong highest operation stream is 360mA, and horizontal direction operating point fractional part is 0.4490, and vertical direction operating point is small
Number part is 0.3577.It is designed according to Hefei light source beam parameters, utilizes circuit provided by the invention, it is possible to achieve not
The real-time detection of operating point is carried out in the case of encouraging line, contrasts original Tune Measurement System, sensitivity improves about
17dB。
Another embodiment of the present invention also provides a kind of method for improving operating point measurement sensitivity, and this method can be based on foregoing
" circuit " that embodiment provides is realized, main as follows：Beam current signal, the two-way coupling of output are coupled using beam position detector
Beam current signal carries out detection processing, the comparative electrode signal after the two-way detection processing of acquisition by an envelope detection circuit respectively
Reverse input end and positive output terminal respectively through the corresponding input of an ac-coupled device to high resistant difference amplifier, successively finally
Signal after the subtraction exported by notch filter and bandpass filter to high resistant difference amplifier is filtered processing.
In the embodiment of the present invention, the beam position detector is made of a pair of of comparative electrode or 4 axisymmetric electrodes.
In the embodiment of the present invention, the envelope detection circuit is real by diode detection circuit or triode detection circuit
It is existing.
In the embodiment of the present invention, the ac-coupled device is realized by serial capacitance device.
In the embodiment of the present invention, the high resistant difference amplifier is the calculus of differences unit of instrument amplifier type.
It should be noted that the specific implementation for the function that each device included in the above method is realized is above
Embodiment in had a detailed description, so it will not be repeated.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (10)
- A kind of 1. circuit for improving operating point measurement sensitivity, it is characterised in that including：Beam position detector, envelope detection Circuit, ac-coupled device, high resistant difference amplifier, notch filter and bandpass filter；Wherein：The two-way output terminal of the beam position detector connects an envelope detection circuit, each envelope detection circuit output respectively End connects an ac-coupled device respectively, and the output terminal of two ac-coupled devices is corresponding to connect the anti-of high resistant difference amplifier To input terminal and positive output terminal, the output terminal connection notch filter of high resistant difference amplifier, the output terminal of notch filter Connect bandpass filter.
- A kind of 2. circuit for improving operating point measurement sensitivity according to claim 1, it is characterised in that the line position Detector is put to be made of a pair of of comparative electrode or 4 axisymmetric electrodes.
- A kind of 3. circuit for improving operating point measurement sensitivity according to claim 1, it is characterised in that the envelope inspection Wave circuit is realized by diode detection circuit or triode detection circuit.
- A kind of 4. circuit for improving operating point measurement sensitivity according to claim 1, it is characterised in that the exchange coupling Clutch is realized by serial capacitance device.
- 5. a kind of circuit for improving operating point measurement sensitivity according to claim 1, it is characterised in that the high resistant is poor Divide the calculus of differences unit that amplifier is instrument amplifier type.
- A kind of 6. method for improving operating point measurement sensitivity, it is characterised in that including：Beam is coupled using beam position detector Signal is flowed, the two-way coupling beam current signal of output carries out detection processing, the two-way inspection of acquisition by an envelope detection circuit respectively Reverse input of the comparative electrode signal respectively through the corresponding input of an ac-coupled device to high resistant difference amplifier after ripple processing End and positive output terminal, finally pass sequentially through notch filter and are transported with the subtraction that bandpass filter exports high resistant difference amplifier Signal after calculation is filtered processing.
- A kind of 7. method for improving operating point measurement sensitivity according to claim 6, it is characterised in that the line position Detector is put to be made of a pair of of comparative electrode or 4 axisymmetric electrodes.
- A kind of 8. method for improving operating point measurement sensitivity according to claim 6, it is characterised in that the envelope inspection Wave circuit is realized by diode detection circuit or triode detection circuit.
- A kind of 9. method for improving operating point measurement sensitivity according to claim 6, it is characterised in that the exchange coupling Clutch is realized by serial capacitance device.
- A kind of 10. method for improving operating point measurement sensitivity according to claim 6, it is characterised in that the high resistant Difference amplifier is the calculus of differences unit of instrument amplifier type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711104978.2A CN107907904A (en) | 2017-11-10 | 2017-11-10 | A kind of circuit and method for improving operating point measurement sensitivity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711104978.2A CN107907904A (en) | 2017-11-10 | 2017-11-10 | A kind of circuit and method for improving operating point measurement sensitivity |
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| CN107907904A true CN107907904A (en) | 2018-04-13 |
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| CN201711104978.2A Withdrawn CN107907904A (en) | 2017-11-10 | 2017-11-10 | A kind of circuit and method for improving operating point measurement sensitivity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768512A (en) * | 2018-04-27 | 2018-11-06 | 电子科技大学 | A kind of measurement full light PAM regenerators operating point system and method |
| CN109085638A (en) * | 2018-08-07 | 2018-12-25 | 西北核技术研究所 | A kind of real-time discrimination system of particle based on bandpass filtering and building and discriminating method |
| CN111398635A (en) * | 2020-04-07 | 2020-07-10 | 嘉兴恩湃电子技术有限公司 | MEMS accelerometer noise test method |
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| US20030026300A1 (en) * | 2001-07-27 | 2003-02-06 | The University Of Chicago | Modular approach to the next generation, short wavelength, laser-like light sources |
| JP2012178288A (en) * | 2011-02-28 | 2012-09-13 | Hitachi Ltd | Synchrotron |
| CN106506071A (en) * | 2016-10-30 | 2017-03-15 | 中国电子科技集团公司第二十九研究所 | A kind of MZM modulator working point control method and device |
| US20170163011A1 (en) * | 2014-04-13 | 2017-06-08 | Hong Kong Baptist University | Tunable amplified spontaneous emission (ase) laser |
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2017
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Patent Citations (4)
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| US20030026300A1 (en) * | 2001-07-27 | 2003-02-06 | The University Of Chicago | Modular approach to the next generation, short wavelength, laser-like light sources |
| JP2012178288A (en) * | 2011-02-28 | 2012-09-13 | Hitachi Ltd | Synchrotron |
| US20170163011A1 (en) * | 2014-04-13 | 2017-06-08 | Hong Kong Baptist University | Tunable amplified spontaneous emission (ase) laser |
| CN106506071A (en) * | 2016-10-30 | 2017-03-15 | 中国电子科技集团公司第二十九研究所 | A kind of MZM modulator working point control method and device |
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| M.GASIOR ET.AL: "HIGH SENSITIVITY TUNE MEASUREMENT BY DIRECT DIODE DETECTION", 《EUROPEAN ORGANIZATION FOR UNCLEAR RESEARCH》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768512A (en) * | 2018-04-27 | 2018-11-06 | 电子科技大学 | A kind of measurement full light PAM regenerators operating point system and method |
| CN108768512B (en) * | 2018-04-27 | 2020-10-16 | 电子科技大学 | System and method for measuring working point of all-optical PAM regenerator |
| CN109085638A (en) * | 2018-08-07 | 2018-12-25 | 西北核技术研究所 | A kind of real-time discrimination system of particle based on bandpass filtering and building and discriminating method |
| CN111398635A (en) * | 2020-04-07 | 2020-07-10 | 嘉兴恩湃电子技术有限公司 | MEMS accelerometer noise test method |
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Application publication date: 20180413 |