CN1297158A - Combined gamma-ray detector - Google Patents
Combined gamma-ray detector Download PDFInfo
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- CN1297158A CN1297158A CN 00135846 CN00135846A CN1297158A CN 1297158 A CN1297158 A CN 1297158A CN 00135846 CN00135846 CN 00135846 CN 00135846 A CN00135846 A CN 00135846A CN 1297158 A CN1297158 A CN 1297158A
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Abstract
A combined gamma-ray detector is composed of waveform discriminator, sensor set composed of multiple sensors, multi-channel analog switch, fast discriminator, address decoder and data acquisition processor. Its advantages are low cost and power and light weight.
Description
The present invention relates to fields of measurement, especially relate to γ (loud, high-pitched sound agate) radiometer of random pulses.
At present, be used for geologic prospecting, aerological measurement and detection of nuclear explosions, the gamma-ray detector that has a kind of composite crystal detector that is made of NaI and CsI and pulse shape discriminator device to constitute, the characteristics of this detection instrument are that each composite crystal detector is equipped with a pulse shape discriminator device.Because the complex structure of pulse shape discriminator device, cost an arm and a leg, power consumption and weight is bigger, and the occasion that nearly all detection instrument is used all requires a plurality of detection instruments to be used in combination, therefore, above-mentioned detection instrument simple combination is used to the user and is brought bigger financial burden, especially when outdoor applied in any combination, also will face many technical difficulties, for example volume, weight are big, and inconvenience is carried, the power supply that is difficult to provide sufficient etc.
At the problems referred to above, the object of the present invention is to provide that a kind of price is low, power consumption is little, lightweight combined type gamma-ray detector.
For achieving the above object, the technical solution used in the present invention is: a kind of combined gamma-ray detector, comprise the pulse shape discriminator device, and the detector set of forming by a plurality of detectors, the analog quantity multi-way switch, fast discriminator, address decoder and data collection processor, wherein, the detectable signal of detector set output is given analog quantity multi-way switch and fast discriminator simultaneously, fast discriminator is given address decoder with the signal of the effective sample area that screens out, produce decoded signal by address decoder and give analog quantity multi-way switch and data collection processor respectively, and then the output signal of corresponding detector is given the pulse shape discriminator device through the analog quantity multi-way switch and is screened in the control detector group, and the signal after will screening is exported to data collection processor and carried out analyzing and processing.
By technique scheme as can be seen, since the present invention by comprise detector set that pulse shape discriminator device and a plurality of detector are formed, analog quantity multi-way switch, discriminator, address decoder and data collection processor are formed soon, by analog quantity multi-way switch, fast discriminator and address decoder, make a plurality of detectors only need dispose a pulse shape discriminator device, therefore the present invention greatly reduces cost, weight and the power consumption of combined gamma-ray detector, greatly reduces failure rate simultaneously.
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is the schematic diagram of the embodiment of the invention;
Fig. 2 is an analog quantity multi-way switch schematic diagram of the present invention.
At first the parts to institute of the present invention foundation briefly introduce.Detector of the present invention is made up of composite crystal and photomultiplier that NaI and CsI constitute usually, the NaI of detector and CsI crystal are under gamma-ray excitation and luminous, and this time dependent photon stream is converted into electric current and is integrated at the negative electrode of photoelectric tube is voltage waveform output.Fast discriminator of the present invention is made of operational amplifier usually, and it is mainly used in the examination of the voltage amplitude of detector output, and the voltage signal that meets the demands is exported as the signal of controlling and being gathered.The analog quantity multi-way switch that the present invention adopts, its principle with multiselect one Switch seemingly.With reference to figure 2.This switch has a plurality of input end of analog signal, under the effect of control signal, connects and to turn round K different analog quantity input signal ends is connected with output terminal, thereby make the analog quantity multi-way switch be carved with different output when different.Whether the signal that the pulse signal discriminator that the present invention adopts is used for the photomultiplier output of resolved detector contains the output composition that the CsI crystal sends.This pulse signal discriminator has two-way output, the signal that the pure NaI crystal of one tunnel output sends, and another road is exported the signal that pure CsI crystal sends or is contained the signal that the CsI crystal sends.
Adopt the present invention of above-mentioned parts to be achieved in that specifically it comprises pulse shape discriminator device (5), and the detector set of forming by a plurality of detectors (1), analog quantity multi-way switch (2), fast discriminator (3), address decoder (4) and data collection processor (6).Above-mentioned parts are connected according to following signal interactively, wherein, the detectable signal of detector set (1) output is given analog quantity multi-way switch (2) and fast discriminator (3) simultaneously, fast discriminator (3) is given address decoder (4) with the signal of the effective sample area that screens out, produce decoded signal by address decoder (4) and give analog quantity multi-way switch (2) and data collection processor (6) respectively, and then the output signal of corresponding detector is given pulse shape discriminator device (5) through analog quantity multi-way switch (2) and is screened in the control detector group (1), and the signal after will screening is exported to data collection processor (6) and carried out analyzing and processing.So far, the present invention has promptly implemented to finish.In the reality, to different requirements of the present invention, described detector set (1) comprises 4 to 6 detectors usually according to the different application occasion, can certainly comprise 2,3 or more than 6 detector.
In the ordinary course of things, the counting rate of detector is 100 of per seconds, and the dead time of circuit is 10 microseconds, if the present invention adopts 6 detectors to form detector set, the probability of missing signal also only is 10
-5, can satisfy actual needs fully.
Claims (2)
1, a kind of combined gamma-ray detector, comprise pulse shape discriminator device (5), it is characterized in that: it also comprises the detector set of being made up of a plurality of detectors (1), analog quantity multi-way switch (2), fast discriminator (3), address decoder (4) and data collection processor (6), wherein, the detectable signal of detector set (1) output is given analog quantity multi-way switch (2) and fast discriminator (3) simultaneously, fast discriminator (3) is given address decoder (4) with the signal of the effective sample area that screens out, produce decoded signal by address decoder (4) and give analog quantity multi-way switch (2) and data collection processor (6) respectively, and then the output signal of corresponding detector is given pulse shape discriminator device (5) through analog quantity multi-way switch (2) and is screened in the control detector group (1), and the signal after will screening is exported to data collection processor (6) and carried out analyzing and processing.
2, combined gamma-ray detector according to claim 1 is characterized in that: described detector set (1) comprises 4 to 6 detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135846 CN1297158A (en) | 2000-12-22 | 2000-12-22 | Combined gamma-ray detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00135846 CN1297158A (en) | 2000-12-22 | 2000-12-22 | Combined gamma-ray detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1297158A true CN1297158A (en) | 2001-05-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00135846 Pending CN1297158A (en) | 2000-12-22 | 2000-12-22 | Combined gamma-ray detector |
Country Status (1)
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| CN (1) | CN1297158A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737032B (en) * | 2010-01-04 | 2013-01-02 | 大庆石油管理局 | Gamma ray detector in carbon/oxygen spectral logging system with alpha particles |
| CN101666227B (en) * | 2008-09-03 | 2013-02-20 | 中国石油天然气集团公司 | Method for acquiring natural gamma spectra |
-
2000
- 2000-12-22 CN CN 00135846 patent/CN1297158A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666227B (en) * | 2008-09-03 | 2013-02-20 | 中国石油天然气集团公司 | Method for acquiring natural gamma spectra |
| CN101737032B (en) * | 2010-01-04 | 2013-01-02 | 大庆石油管理局 | Gamma ray detector in carbon/oxygen spectral logging system with alpha particles |
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