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Electron-multiplier tube performance testing method and device under vacuum condition

A technology of photomultiplier tubes and vacuum conditions, which is applied in the direction of measuring devices, measuring electricity, and radiation measurement, which can solve the problems of scrapped detectors, large economic losses, and long vacuuming time, and achieve the effect of being easy to move

Inactive Publication Date: 2007-11-07
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Problems solved by technology

[0008] 1. The vacuuming time is too long
[0009] 2. Since the detector has been fully assembled at this time, once the photomultiplier tube is damaged due to low-pressure discharge during the test, the detector will basically be scrapped, and the economic loss will be too great

Method used

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  • Electron-multiplier tube performance testing method and device under vacuum condition

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Embodiment 1

[0042] Embodiment 1, the method and device of photomultiplier tube performance test under vacuum condition, with reference to Fig. 1:

[0043] A self-made set of small circular vacuum tanks, the side and bottom of the tank are made of 2.5mm thick stainless steel, and the sealed top plate is made of 12mm thick stainless steel plate. There are voltage adapters and air release valves required for electrical testing on the cover plate, and a valve connected to the vacuum system on the side. There are three universal wheels at the bottom of the vacuum tank for easy movement. Using this device, the packaged photomultiplier tube can be unit tested according to the following steps.

[0044] Clean the inner wall of the vacuum tank with alcohol, and dry it with a hair dryer; connect the vacuum system; put the cleaned Φ120mm, 80mm thick CsI crystal into the vacuum tank, and evenly coat a layer of silicone oil on the light emitting end of the crystal; clean it with alcohol Dry the end f...

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Abstract

The invention relates to a method of photomultiplier aptitude testing under the vacuum condition: making the circle tubular vacuum tank to connect vacuum system well; putting the CsI crystal in the vacuum tank; putting the photomultiplier on the CsI crystal end surface and coupling well; making the photomultiplier to connect power supply system well; evacuation after covered the sealing coping well; adding the electricity when the vacuum degree achieved the request; placing the 137Cs isotope radioactive source in the vacuum tank base; after the detector adds the electricity and works, pre-amplifier, the main amplifier enlarges the small pulse signal which outputs by the detector and transmits to the multichannel analyzer, obtains the power spectrum curve. The main body of the invention equipment is a circle tubular vacuum tank, there is the voltage transferring part which the electricity tests needs and the bleeder valve above the lap, a valve in the side face connects the vacuum system. The existing technology only can qualitatively test the photomultiplier aptitude. The invention method and the equipment may quantitatively test the photomultiplier gain and energy resolution ratio and so on performance, and can achieve to the purpose of excellent selecting the need photomultiplier.

Description

technical field [0001] The invention relates to a space astronomical observation instrument, in particular to a method for testing the performance of a photomultiplier tube in a scintillation detector in a space environment simulation test (under vacuum conditions), and a device used in the method. technical background: [0002] Photomultiplier tube is an important device in scintillation detector. Scintillation detectors are powerful tools for detecting particles in the field of nuclear physics and particle physics. In actual work, due to various special applications, it is necessary to make a dedicated scintillation device. [0003] Compared with instruments used on the ground, the safety and reliability requirements for instruments working on satellites or spacecraft are very high. The working life of the instrument is required to be 1 to 3 years. [0004] After the scintillation detector is assembled, a series of space environment simulation tests need to be carried o...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01T1/208
Inventor 宫一忠张仁健常进唐和森王楠森胡一鸣蔡明生马涛张南于敏毛建萍
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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