CN208860960U - Tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system - Google Patents
Tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system Download PDFInfo
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- CN208860960U CN208860960U CN201820991089.6U CN201820991089U CN208860960U CN 208860960 U CN208860960 U CN 208860960U CN 201820991089 U CN201820991089 U CN 201820991089U CN 208860960 U CN208860960 U CN 208860960U
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Abstract
The utility model discloses a kind of tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring systems, its principle is that the light device that is split that light source generates is divided into canonical reference light source beam, then it passes sequentially through fiber optic bundle and optical fiber enters light guide, obtain the gain coefficient of photomultiplier tube through signal acquisition process after being amplified by photomultiplier tube.The utility model efficiently solves the problems, such as all measuring channels gain of photomultiplier coefficients monitoring of tokamak neutron camera, be highly suitable for all gain of photomultiplier coefficients all must consistency tokamak neutron phase machine diagostic system.
Description
Technical field
The invention belongs to a kind of magnetic confinement nuclear fusion nuclear measurement systems, and in particular to a kind of gain of photomultiplier coefficient
Real-time monitoring system, especially suitable for per pass gain of photomultiplier coefficient all must strict control magnetic confinement nuclear fusion neutron phase
Machine system.
Background technique
With the raising of magnetic confinement nuclear fusion plasma parameter and neutral beam injecting power, Fusion Neutron diagnosis wait from
Effect in daughter experiment becomes more and more important.Neutron camera can provide Fusion Neutron distribution, Fusion power and its Density Distribution etc.
Important information is the key diagnostic of experimental study core energy constraint, hydromagnetic instability and high energy particle etc..
Tokamak neutron camera is neutron irradiation section diagnostic system, therefore the photomultiplier transit in neutron camera measurement channel
Pipe gain coefficient must being consistent property, the consistency of gain of photomultiplier coefficient determines the essence of neutron camera measurement result
Exactness.And in the work of neutron camera, gain of photomultiplier coefficient can be with external environments such as operating temperature, time spans
Change and change, the consistency so as to cause gain of photomultiplier coefficient is destroyed, and then leads to neutron camera measurement
As a result accuracy is deteriorated or even signal is distorted completely.Array photoelectric multiplier tube gain coefficient real-time monitoring system of the invention, energy
The variation of enough every one of photomultiplier transit gain coefficients of real-time monitoring neutron camera efficiently solves neutron camera array photoelectricity times
The problem of increasing pipe gain coefficient consistency.
Summary of the invention
The purpose of the present invention is to provide a kind of tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring systems
System, it can be improved the accuracy and reliability of the experimental measurements of neutron camera.
Technical scheme is as follows: tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system,
It includes that reference light source generation system, beam splitting system and gain coefficient obtain system.
The reference light source generation system includes: pulse signal producer, signal cable and light source generator, wherein
Pulse signal producer is located at light source generator front end, is connected by signal cable pulse signal producer with light source generator.
The pulse signal producer and signal cable generation impulse waveform, frequency 20kHz, 2.5 μ s of pulse width,
Duty ratio 50%, signal cable are coaxial cable.
The beam splitting system includes: optical splitter, fiber optic bundle and optical fiber；Wherein, after optical splitter front end and light source generator
End coupling is connected, and fiber optic bundle front end is connected with the coupling of optical splitter rear end, and fiber optic bundle rear end separates independent transmission fiber.
The light that the light source generator generates is visible light；Optical splitter generate reference light source beam every light beam it is strong
It spends all consistent with frequency；A branch of reference light source enters an optical fiber.
It includes: signal cable, optical fiber, scintillator, light guide, photomultiplier tube and signal that the gain coefficient, which obtains system,
Acquisition processing system, wherein scintillator and photomultiplier tube are coupled by light guide and form detector system, and light guide is located at
Between scintillator and photomultiplier tube, optical fiber is coupled with light guide, and photomultiplier transit tube anode passes through signal cable and signal
Acquisition processing system is connected.
The signal acquiring processing system uses high-speed digitization instrument CAEN DT5751,10Bit, sample rate 2GS/
s。
The beneficial effects of the present invention are: efficiently solve all measuring channels photomultiplier tubes of tokamak neutron camera
The problem of gain coefficient monitors, suitable for all gain of photomultiplier coefficients all must the tokamak neutron camera of consistency examine
Disconnected system.
Detailed description of the invention
Fig. 1 is tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system provided by the present invention signal
Figure.
Wherein, 1 pulse signal producer, 2 signal cables, 3 light source generators, 4 optical splitters, 5 fiber optic bundles, 6 optical fiber, 7 dodge
Bright body, 8 light guides, 9 photomultiplier tubes, 10 signal acquiring processing systems.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
During the work of tokamak neutron camera system, the gain of photomultiplier coefficient of Measurement channel needs prison in real time
Survey the consistency to guarantee gain coefficient.For solve neutron camera photomultiplier tube gain coefficient monitoring problem, need using
Gain of photomultiplier coefficient real-time monitoring system.
As shown in Figure 1, tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system, the monitoring system packet
Include: pulse signal producer 1, signal cable 2, light source generator 3, optical splitter 4, fiber optic bundle 5, optical fiber 6, scintillator 7, light guide 8,
Photomultiplier tube 9 and signal acquiring processing system 10.
Reference light source generation system includes: pulse signal producer 1, signal cable 2 and light source generator 3.Pulse signal
Generator 1 is located at 3 front end of light source generator.By signal cable 2, pulse signal producer 1 is connected with light source generator 3.Its
In, pulse signal producer 1 and the generation impulse waveform of signal cable 2, frequency 20kHz, 2.5 μ s of pulse width, duty ratio 50%,
Signal cable is coaxial cable.
Beam splitting system includes: optical splitter 4, fiber optic bundle 5 and optical fiber 6.Wherein, 4 front end of optical splitter and 3 rear end of light source generator
Coupling is connected, and 5 front end of fiber optic bundle is connected with the coupling of 4 rear end of optical splitter, and 5 rear end of fiber optic bundle separates independent transmission fiber 6.Its
In, the light that light source generator generates is visible light；The intensity and frequency of the every light beam for the reference light source beam that optical splitter generates are all
Unanimously；A branch of reference light source enters an optical fiber.
It includes: signal cable 2, optical fiber 6, scintillator 7, light guide 8, photomultiplier tube 9 and signal that gain coefficient, which obtains system,
Acquisition processing system 10.Scintillator 7 and photomultiplier tube 9 are coupled by light guide 8 forms detector system, and light guide 8
Between scintillator 7 and photomultiplier tube 9.Optical fiber 6 is coupled with light guide 8.9 anode of photomultiplier tube passes through signal wire
Cable 2 is connected with signal acquiring processing system 10.Wherein, signal acquiring processing system 10 uses high-speed digitization instrument CAEN
DT5751,10Bit, sample rate 2GS/s.
The course of work of the invention is as follows: pulse signal producer 1 inputs arteries and veins to light source generator 3 by signal cable 2
Signal is rushed, light source generator generates light-pulse generator.The light-pulse generator device 4 that is split is divided into reference light source beam, reference light source beam it is every
The intensity of light beam is identical with frequency.Reference light source beam enters transmission fiber 6 by fiber optic bundle 5, and a branch of reference light source enters one
Root optical fiber.Reference light source enters the light guide 8 of photomultiplier tube by optical fiber, through signal acquisition after then being amplified by photomultiplier tube
Processing 10 obtains the gain coefficient of photomultiplier tube.
Claims (4)
1. tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system, it is characterised in that: it includes reference light
Source generation system, beam splitting system and gain coefficient obtain system；
The reference light source generation system includes: pulse signal producer (1), signal cable (2) and light source generator (3),
Wherein, pulse signal producer (1) is located at light source generator (3) front end, passes through signal cable (2) pulse signal producer (1)
It is connected with light source generator (3)；
The beam splitting system includes: optical splitter (4), fiber optic bundle (5) and optical fiber (6)；Wherein, optical splitter (4) front end and light source
The coupling of generator (3) rear end is connected, and fiber optic bundle (5) front end is connected with the coupling of optical splitter (4) rear end, and fiber optic bundle (5) rear end separates
Independent transmission fiber (6)；
It includes: signal cable (2), optical fiber (6), scintillator (7), light guide (8), photomultiplier transit that the gain coefficient, which obtains system,
Manage (9) and signal acquiring processing system (10), wherein scintillator (7) and photomultiplier tube (9) pass through light guide (8) and be coupled in one
Composition detector system is played, light guide (8) is located between scintillator (7) and photomultiplier tube (9), and optical fiber (6) is coupled with light guide (8)
Together, photomultiplier tube (9) anode is connected by signal cable (2) with signal acquiring processing system (10).
2. tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system as described in claim 1, feature
It is: pulse signal producer (1) the generation impulse waveform, frequency 20kHz, 2.5 μ s of pulse width, duty ratio 50%,
Signal cable is coaxial cable.
3. tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system as described in claim 1, feature
Be: the light that the light source generator (3) generates is visible light；The every light beam for the reference light source beam that optical splitter (4) generates
Intensity it is all consistent with frequency；A branch of reference light source enters an optical fiber.
4. tokamak neutron camera photomultiplier tube gain coefficient real-time monitoring system as described in claim 1, feature
Be: the signal acquiring processing system (10) uses high-speed digitization instrument CAENDT5751,10Bit, sample rate 2GS/
s。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646832A (en) * | 2018-06-26 | 2020-01-03 | 核工业西南物理研究院 | Tokamak neutron camera photomultiplier gain coefficient real-time monitoring system |
| CN112526582A (en) * | 2019-09-19 | 2021-03-19 | 核工业西南物理研究院 | High-space-time resolution imaging system for fast electrons in Tokamak plasma |
-
2018
- 2018-06-26 CN CN201820991089.6U patent/CN208860960U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646832A (en) * | 2018-06-26 | 2020-01-03 | 核工业西南物理研究院 | Tokamak neutron camera photomultiplier gain coefficient real-time monitoring system |
| CN110646832B (en) * | 2018-06-26 | 2024-08-09 | 核工业西南物理研究院 | Real-time monitoring system for gain coefficient of photomultiplier of tokamak neutron camera |
| CN112526582A (en) * | 2019-09-19 | 2021-03-19 | 核工业西南物理研究院 | High-space-time resolution imaging system for fast electrons in Tokamak plasma |
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