CN201021941Y - Single ion bundle remote counting detector - Google Patents
Single ion bundle remote counting detector Download PDFInfo
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- CN201021941Y CN201021941Y CNU2007200357546U CN200720035754U CN201021941Y CN 201021941 Y CN201021941 Y CN 201021941Y CN U2007200357546 U CNU2007200357546 U CN U2007200357546U CN 200720035754 U CN200720035754 U CN 200720035754U CN 201021941 Y CN201021941 Y CN 201021941Y
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Abstract
The utility model discloses a single-ion-beam remote count detector, which is characterized in that the utility model comprises a photospot-type light-sensitive detector. When the photospot-type light-sensitive detector detects photon signal, the output voltage signal is magnified by a magnifier and then discriminated and shaped by a single-channel analyzer SCA, the output pulse signal is divided into two ways, one way is directly inputted into a digital counter for digital counting, the other way is inputted into a trigger for integral stretching of narrow impulse signal and then is converted into analog signal by a frequency-voltage converter and outputted into an analog signal counting display device. The utility model highly effectively collects the feeble signal of single ion by the photospot-type light-sensitive detector and discriminates and shapes the signal by the single-channel analyzer (SCA), which remarkably eliminates ambient noise, increases signal-to-noise ratio, achieves narrow pulse signal with the same amplitude, guarantees quick response to ion signal and the reliability of signal transmission within the range of one thousand meters, and brings convenience for experiment staff to remotely regulate and monitor ion beam current to effectively assure the safety of the experiment staff.
Description
Technical field
The utility model relates to a kind of device that detects single ion beam number, has the function of judging ion beam stability and break-make thereof simultaneously; Especially a kind of remote, real-time device that accurately detects the ion beam number.
Background technology
Single ion beam is state-of-the-art in the world at present a kind of line technology.Single ion beam apparatus of Hefei Inst. of Plasma Physics, Chinese Academy of Sciences's independent development is unique and the device with international most advanced level of present China.This device has been realized the function of the single ion of radiation, and the spatial positioning accuracy of ion is better than 5 microns, and the sample moving step length is less than 0.1 micron.Single ion beam apparatus has adopted technology such as high-resolution CCD, image fast processing and identification, makes irradiated process automation and visual.Single ion beam can carry out radiation to the sample (as individual cells) of micron-scale, and radiation dose can accurately be set in advance, and is accurate to an ion.This and traditional wide beam radiation and microbeam radiation are far different.Single ion beam has become powerful technology platform at numerous areas such as biology, material, physics, chemistry.
Realize single ion irradiation technology, must can detect single ion signal, accurately detect ion populations, so that ion number signal is sent to control system, to control the break-make of single ion beam.Single ion detection system response ability is fast in time turn-offed line, makes it to launch the ion of institute's predetermined number.Requirement of experiment adopts the film scintillator of 15 micron thickness to survey single ion, produces photon when ion passes through the film scintillator, then can the detection of photons signal with photodetector.The speed of experiment intermediate ion (proton) is up to 10
7Meter per second, so ion passes through the film scintillator detector of 15 micron thickness fast, only needs 10
-12Second.Therefore the photon signal that single ion excited is very faint, and photon signal pulse very narrow (nanosecond order).Therefore, be one of the gordian technique of single ion beam and difficult point technology to the detection of single ion.
Single ion beam global enumeration detecting device can be on away from the position of line radiation the duty of the single ion beam of monitoring, be the important means that the experimenter is used to regulate, monitor line, also be the necessary safety practice of protection radiation.
Summary of the invention
At detection, counting and the radiation safety of single ion beam, the utility model has designed single ion beam global enumeration detecting device.This device can monitor single ion populations, line stability and break-make situation in 1000 meters scopes; Can monitor the duty of single ion beam on away from the position of radiation source, guarantee staff's radiation safety.
The technical solution of the utility model:
Single ion beam global enumeration detecting device, it is characterized in that including light collecting photodetector, after it detects photon signal, output voltage signal amplifies through amplifier, again by single channel analyzer SCA screen, shaping handles, the pulse signal of output is divided into two the tunnel, the one road and is directly inputted to digicounter and carries out digital counting; Another road is input to the integration broadening that trigger carries out narrow pulse signal, outputs to the simulating signal counting display device after the process frequency-voltage converter is converted into simulating signal again.
The characteristics that this practicality is new:
1), single ionic light signal is converted into electric signal by highly sensitive, low noise, light collecting photodetector.About light collecting photodetector can double the photon collection efficiency, detect the feeble signal of single ion effectively.
2), amplify with high precision, low noise, high power amplifier and to this signal.
3), signal is screened processing with single-channel analyzer (SCA), eliminated ground unrest, improved signal to noise ratio (S/N ratio), and obtain the narrow pulse signal of amplitude unanimity, about 500 nanoseconds of its pulse width, guaranteed the rapid response to ion signal, this narrow pulse signal amplitude is 5V, has guaranteed the reliability of 1000 meters interior signal transmission of distance range.
The pulse signal of SCA output divides two-way to transfer to the back level.One the road is directly inputted to digicounter can carry out digital counting.Another road is converted into simulating signal and carries out analog counting, can detect the flux and the break-make situation of single ion beam intuitively.Adopt frequency-voltage conversion circuit can obtain simulating signal, but it is too narrow in the reality owing to pulse signal, change-over circuit is difficult to response and even can not works, the utility model has designed earlier suitable to the narrow pulse signal integration broadening of trigger mode especially, and then has realized the simulation output of single ion signal with comparalive ease with frequency-voltage transformation module.
The utility model is collected the feeble signal of single ion efficiently by light collecting photodetector, (SCA) screens processing to signal with single-channel analyzer, greatly eliminated ground unrest, improved signal to noise ratio (S/N ratio), obtain the narrow pulse signal of amplitude unanimity, this narrow pulse signal amplitude is 5V, guaranteed reliability to signal transmission in the rapid response of ion signal and the 1000 meters distance ranges, realized that single ion detects and counts, can judge the break-make and the stability thereof of single ion beam, in 1000 meters scopes, can simulate the number that shows single ion beam, make things convenient for the experimenter to regulate at a distance, the monitoring ion line has effectively ensured experimenter's safety.
Description of drawings
Accompanying drawing has been represented electrical schematic diagram of the present utility model.
Embodiment
Number in the figure: 1. light collecting photodetector, 2. signal amplifier, enlargement factor is adjustable, is up to 1000 times, 3. single channel analyzer (SCA), 4. digicounter 5. triggers, 6. frequency-voltage converter (F-V), 7. simulating signal counting display device
Carry out connecting between each components and parts according to the connected mode of accompanying drawing.When an ion projects scintillator, scintillator sends photon signal, select high sensitivity, low noise, light collecting photodetector detection of photons signal for use, the voltage signal that it is exported amplifies about 1000 times through amplifier, again by single-channel analyzer SCA screen, shaping handles, output amplitude is 5V, the ultra-narrow pulse signal of about 500 nanoseconds of pulsewidth.
The pulse signal of SCA output divides two-way to be sent to the back level.One the road is directly inputted to digicounter carries out digital counting; Another road is converted into simulating signal and carries out analog counting, with flux and the break-make situation that detects single ion beam intuitively.Especially, the utility model design triggers processing with trigger to narrow pulse signal, and then realizes the output of simulation count signal with frequency-voltage converter (F-V).Two kinds of forms are counted in digital counting that the utility model is designed and simulation, have satisfied the different needs of actual observation and record.
Claims (1)
1. single ion beam global enumeration detecting device, it is characterized in that including light collecting photodetector, after it detects photon signal, output voltage signal amplifies through amplifier, again by single channel analyzer SCA screen, shaping handles, the pulse signal of output is divided into two the tunnel, the one road and is directly inputted to digicounter and carries out digital counting; Another road is input to the integration broadening that trigger carries out narrow pulse signal, outputs to the simulating signal counting display device after the process frequency-voltage converter is converted into simulating signal again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357546U CN201021941Y (en) | 2007-04-02 | 2007-04-02 | Single ion bundle remote counting detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200357546U CN201021941Y (en) | 2007-04-02 | 2007-04-02 | Single ion bundle remote counting detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201021941Y true CN201021941Y (en) | 2008-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200357546U Expired - Fee Related CN201021941Y (en) | 2007-04-02 | 2007-04-02 | Single ion bundle remote counting detector |
Country Status (1)
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| CN (1) | CN201021941Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661000B (en) * | 2009-09-18 | 2012-07-04 | 中国科学院等离子体物理研究所 | Novel ion detection system applied to single-ion microbeam device and based on spectroscope |
| CN101661109B (en) * | 2009-09-18 | 2012-10-03 | 中国科学院等离子体物理研究所 | Novel signal-ion micro-beam detector based on plastic scintillating fiber |
| CN102788774A (en) * | 2012-07-17 | 2012-11-21 | 中国科学院合肥物质科学研究院 | Single ion beam-based time-correlated signal photon counting fluorescence detection technology |
| CN112166348A (en) * | 2018-05-09 | 2021-01-01 | 塔吉特系统电子有限责任两合公司 | Method and apparatus for measuring high dose rate ionizing radiation |
-
2007
- 2007-04-02 CN CNU2007200357546U patent/CN201021941Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101661000B (en) * | 2009-09-18 | 2012-07-04 | 中国科学院等离子体物理研究所 | Novel ion detection system applied to single-ion microbeam device and based on spectroscope |
| CN101661109B (en) * | 2009-09-18 | 2012-10-03 | 中国科学院等离子体物理研究所 | Novel signal-ion micro-beam detector based on plastic scintillating fiber |
| CN102788774A (en) * | 2012-07-17 | 2012-11-21 | 中国科学院合肥物质科学研究院 | Single ion beam-based time-correlated signal photon counting fluorescence detection technology |
| CN102788774B (en) * | 2012-07-17 | 2014-08-13 | 中国科学院合肥物质科学研究院 | Single ion beam-based time-correlated signal photon counting fluorescence detection technology |
| CN112166348A (en) * | 2018-05-09 | 2021-01-01 | 塔吉特系统电子有限责任两合公司 | Method and apparatus for measuring high dose rate ionizing radiation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20080213 Termination date: 20110402 |