CN1039306A - Novel scintillation detector temperature control autostabilization system - Google Patents
Novel scintillation detector temperature control autostabilization system Download PDFInfo
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- CN1039306A CN1039306A CN 88104196 CN88104196A CN1039306A CN 1039306 A CN1039306 A CN 1039306A CN 88104196 CN88104196 CN 88104196 CN 88104196 A CN88104196 A CN 88104196A CN 1039306 A CN1039306 A CN 1039306A
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- temperature
- scintillation detector
- control
- spectrum stabilization
- scintillation
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Abstract
Novel scintillation detector temperature control autostabilization system, be by scintillation detector assembly, pulse amplifier, pulse height analyzer, high-voltage power supply and temperature sensitive spectrum stabilization control function generator (8) are formed, wherein the scintillation detector assembly comprises scintillation crystal, and photomultiplier and temperature sensor is characterized in that temperature sensitive spectrum stabilization control function F (T) generator is by signal amplifier, mould-A/D converter, memory bank, digital-to-analog converter, sieve are seized the unit and are formed.Use native system can not adopt the spectrum stabilization reference source, circuit is simple, and the spectrum stabilization temperature range is wide, and applicability is strong, when systematic parameter changes, can also write the control number again, and is easy to use.
Description
The invention belongs to the nuclear radiation detection field.
In nuclear radiation measurement (spectral measurement or ionization meter), must solve the problem of measurement accuracy temperature influence, i.e. temperature drift problem.Up to now, adopt temperature control scintillation detector autostabilization system, roughly be divided into two classes, respectively as accompanying drawing 1, shown in the accompanying drawing 2.In accompanying drawing 1, by temperature sensitive spectrum stabilization control function F(T) generator [8], according to temperature sensor [6], measured scintillation probe assembly (scintillator and photomultiplier) temperature T, provide control parameter F(T) (voltage or electric current), in order to control high-voltage power supply [7] output voltage, to adjust the multiplication constant (control line [9]) of photomultiplier, or in order to gating pulse amplifier [4] gain (control line [10], pulse height analyzer [5] gain (control line [11]) is to reach the stable purpose of nuclear radiation measurement (spectral measurement or ionization meter).
In the accompanying drawing 2, the light pulse that light emitting diode [33] produces is surveyed the electric pulse that forms and is analyzed by pulse height analyzer [5] through linear pulse amplifier [4] amplification through photomultiplier [3], closed loop automatic spectrum stabilization device [24] will provide spectrum stabilization control parameter [25] according to the drift situation of the relative nominal value of light pulse position of spectral line, the control survey system-gain, for example: (control line [9] is to change the multiplication constant of photomultiplier [3] for the output voltage of control high-voltage power supply [7], or the enlargement factor (control line [10]) of control linear amplifier [4], or the gain of gating pulse amplitude analyzer [5] (control line [11], the light pulse spectral line that light emitting diode is sent is got back to nominal value, to reach the purpose of stably measured system.Temperature sensor [6] records temperature T, and temperature sensitive control function generator [8] produces control parameter F(T), the light pulse intensity that light emitting diode [33] sends is adjusted in control light emitting diode pulse excitation source [34].
The key problem in technology of this type systematic is temperature sensitive spectrum stabilization control function F(T) formation of generator [8], it must all provide correct control parameter F(T in whole operating temperature range), just can obtain the good result of stably measured.Prior art adopts thermosensitive device network (containing temperature sensor) to constitute temperature sensitive spectrum stabilization control function generator [8] more, because dissimilar scintillator or photomultiplier temperature drift rule rate differences, the control characteristic of each measuring system also can be different, so this class control function F(T) generator [8] must be matched meticulously at each specific system, just can obtain good effect, and, work as system aging, when temperature drift characteristic changes, the systems stabilisation degradation, even, the function generator of having to match again, thus this type systematic poor stability, a large amount of production, maintenance is used all inconvenient.
The present invention is exactly at above-mentioned deficiency, and a kind of temperature sensitive spectrum stabilization control function generator [8] that can extensively adapt to all kinds scintillation detector temperature control autostabilization system is provided, and constitutes a kind of novel scintillation detector temperature control autostabilization system.
The present invention-novel scintillation detector temperature control autostabilization system (seeing accompanying drawing 3), be by scintillation detector assembly [1], pulse amplifier [4], pulse height analyzer [5], high-voltage power supply [7] and temperature sensitive spectrum stabilization control function generator [8] are formed, scintillation detector assembly [1] comprises scintillation crystal [2], photomultiplier [3] and temperature sensor [6], it is characterized in that temperature sensitive spectrum stabilization control function F(T) generator [8] is by signal amplifier [12], mould-number (A/D) transducer [13], memory bank [14], number-Mo (D/A) transducer [15], sieve are seized control module [16] and are formed.Signal by temperature sensor [6] is after amplifier [12] amplifies, be converted to digital quantity [17] by mould-number (A/D) transducer [13], address code storage as memory bank [14], in case of necessity, after " control number " output is deposited in this address in the memory bank, be converted to due spectrum stabilization control parameter F(T under this temperature T through number-Mo (D/A) transducer [15]), because these " control numbers " can write as requested in advance, sieve is seized control module and is produced timing control signal, make analogue-digital converter [13] press the conversion of certain hour interval sampling, under memory bank [14] the output temperature T due " control number ".Memory bank [14] and sieve are seized control module [16] also can have the microcomputer of suitable IO interface or single chip microcomputer system to constitute by one.
Write the work of " control number " to memory bank, can measure due under the different temperatures " control number ", write to memory bank again according to the experiment of detector bulk temperature.Those skilled in the art accomplishes that this point is not difficult.
The present invention adopts the temperature sensitive spectrum stabilization control function generator that can deposit arbitrary function in, carry out spectrum stabilization control, applicable to various scintillators and photomultiplier, have than extensive applicability, when being used for a new system, only need write required control function control, it is operate as normal, this method is not disturbed so can not produce tested spectral line without the spectrum stabilization reference source, and circuit can be done fairly simplely, so can develop the stable scintillation probe of wide temperature working range, in order to replace complicated spectrum stabilization system, can economize on the use of funds, in order to replace not adding the probe of spectrum stabilization measure, then can improve the practicality of system greatly, especially in the big occasion of variation of ambient temperature, for example, in some industrial applications, because four seasons variation of ambient temperature is big, must regulate gain by Various Seasonal, could normally use, in the not high occasion of operating personnel's technical quality, use and just have any problem, use native system, then can change big applications, need not special adjustment at temperature in four seasons.And for example, oil geology well logging, 100 meters of the every increases of well depth, temperature rising 3.3 degree, below the 5-6 km, the well temperature will reach 150-200C, so when scintillation detector is used for nuclear logging, must take stabilizing measures, especially spectral log, spectrum stabilization becomes the key problem in technology of well logging success or failure.Native system does not use the spectrum stabilization reference source because adaptability is strong, and no spectral line disturbs, and circuit is simple, measures accurately, and is easy to use.
Introduce an embodiment below in conjunction with accompanying drawing 4, accompanying drawing 4 expression bismuth germanium oxide (BGO) scintillation spectrometers adopt the concrete wiring diagram of this spectrum stabilization system, and the corresponding relation of each several part is in device in this circuit and the accompanying drawing 2:
In the accompanying drawing 4 in the accompanying drawing 2
CA3140 temperature signal (direct current) amplifier [12]
ADC0804 analogue-digital converter [13]
2716 memory banks [14]
AD558 digital-to-analog converter [15]
1455,4538,4024 sequential circuits [16]
Being simply described as follows of accompanying drawing:
1. scintillation detector assembly 2. scintillation crystals
3. photomultiplier 4. pulse amplifiers
5. pulse height analyzer 6. temperature sensors
7. high-voltage power supply 8. temperature sensitive spectrum stabilization control function generators
9. 10. control line (enlargement factor control) of control line (multiplication constant control)
11. control line (gain control) 12. signal amplifiers
13. mould-number (A/D) transducer 14. memory banks
15. number-Mo (D/A) transducer 16. sieve are seized control module
17. digital quantity 24. closed loop automatic spectrum stabilization devices
33. light emitting diode 34. light emitting diode pulse excitation sources
Claims (2)
1, novel scintillation detector temperature is visited autostabilization system, be by scintillation detector assembly [1], pulse amplifier [4], pulse height analyzer [5], high-voltage power supply [7] and temperature sensitive spectrum stabilization control function generator [8] are formed, scintillation detector assembly [1] comprises scintillation crystal [2], photomultiplier [3] and temperature sensor [6], it is characterized in that temperature sensitive spectrum stabilization control function F (T) generator [8] is by signal amplifier [12], mould--number (A/D) transducer [13], memory bank [14], number--mould (D/A) transducer [15], sieve are seized control module [16] and are formed.
2, according to the said novel scintillation detector temperature control autostabilization system of claim 1, it is characterized in that said memory bank [14], sieve is seized control module [16], is to be made of a microcomputer system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104196 CN1028308C (en) | 1988-07-14 | 1988-07-14 | Temp. controlled autostable system for scintillation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88104196 CN1028308C (en) | 1988-07-14 | 1988-07-14 | Temp. controlled autostable system for scintillation detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1039306A true CN1039306A (en) | 1990-01-31 |
| CN1028308C CN1028308C (en) | 1995-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88104196 Expired - Fee Related CN1028308C (en) | 1988-07-14 | 1988-07-14 | Temp. controlled autostable system for scintillation detector |
Country Status (1)
| Country | Link |
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| CN (1) | CN1028308C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041238C (en) * | 1990-10-30 | 1998-12-16 | 株式会社岛津制作所 | Apparatus for analyzing x-ray |
| CN101793970B (en) * | 2009-02-04 | 2013-08-28 | 通用电气公司 | Radiation detector assembly |
| CN102084312B (en) * | 2008-07-03 | 2014-07-30 | 圣戈本陶瓷及塑料股份有限公司 | Active voltage divider for detector |
| CN104697606A (en) * | 2013-12-06 | 2015-06-10 | Vega格里沙贝两合公司 | Radiometric measuring assembly |
| CN105074500A (en) * | 2013-02-22 | 2015-11-18 | 阿雷瓦核废料回收公司 | Method for controlling the gain and zero of a multi-pixel photon counter device, and light-measuring system implementing said method |
| CN107219548A (en) * | 2017-07-31 | 2017-09-29 | 四川省核工业地质调查院 | A kind of portable anti-Compton survey meter |
| CN110612463A (en) * | 2017-03-27 | 2019-12-24 | 斯伦贝谢技术有限公司 | Nuclear logging tool having at least one gamma ray scintillation detector employing a gyroscope-based scintillator material |
-
1988
- 1988-07-14 CN CN 88104196 patent/CN1028308C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1041238C (en) * | 1990-10-30 | 1998-12-16 | 株式会社岛津制作所 | Apparatus for analyzing x-ray |
| CN102084312B (en) * | 2008-07-03 | 2014-07-30 | 圣戈本陶瓷及塑料股份有限公司 | Active voltage divider for detector |
| CN101793970B (en) * | 2009-02-04 | 2013-08-28 | 通用电气公司 | Radiation detector assembly |
| CN105074500A (en) * | 2013-02-22 | 2015-11-18 | 阿雷瓦核废料回收公司 | Method for controlling the gain and zero of a multi-pixel photon counter device, and light-measuring system implementing said method |
| CN105074500B (en) * | 2013-02-22 | 2018-04-20 | 欧安诺循环 | For controlling the gain of more pixel photon counting equipments and the method for zero point and implementing the light measurement system of the method |
| CN104697606A (en) * | 2013-12-06 | 2015-06-10 | Vega格里沙贝两合公司 | Radiometric measuring assembly |
| CN110612463A (en) * | 2017-03-27 | 2019-12-24 | 斯伦贝谢技术有限公司 | Nuclear logging tool having at least one gamma ray scintillation detector employing a gyroscope-based scintillator material |
| CN110612463B (en) * | 2017-03-27 | 2022-06-07 | 斯伦贝谢技术有限公司 | Nuclear logging tool having at least one gamma ray scintillation detector employing thallium-based scintillator material |
| CN107219548A (en) * | 2017-07-31 | 2017-09-29 | 四川省核工业地质调查院 | A kind of portable anti-Compton survey meter |
| CN107219548B (en) * | 2017-07-31 | 2023-10-27 | 四川省核地质调查研究所 | Portable anti-Compton detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1028308C (en) | 1995-04-26 |
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