Connection and protection device for photo-multiplier tube detector
A technology of photomultiplier tube and protection device, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of affecting the light transmission efficiency, inconsistent force, forming gaps, etc., so as to improve the light transmission efficiency and detection efficiency, and is not easy to fall off. Effect
Inactive Publication Date: 2013-12-25
PEKING UNIV
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Problems solved by technology
However, in practice, it is found that the following engineering technical problems seriously affect the performance of the detector, such as: 1) because an optical coupling agent is needed between the scintillator and the photomultiplier tube to improve the light transmission efficiency, the scintillator and the photomultiplier tube need to be firmly, Stable connection, uniform contact surface and consistent force, but it is difficult to achieve; 2) For horizontally placed scintillators and photomultiplier tubes, the latter is prone to gravity sag, resulting in uneven contact surfaces and inconsistent forces , forming voids, causing the optical coupling agent to fall off and affecting the light transmission efficiency and detection efficiency; etc.
Method used
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[0021] The present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings.
[0022] Such as figure 1 As shown, the photomultiplier tube detector connection protection device of the present invention includes: a photomultiplier tube 1 , a scintillator 2 , a PMT-scintillation body coupling body 3 , a PMT bracket 4 and a PMT base 6 .
[0023] The scintillator 2 is a special material with a certain geometric shape, such as BC408 plastic produced by Backron Company of the United States, with a cross-sectional size of 5cm*6cm and a length determined according to needs.
[0024] The PMT is a vacuum device with a diameter of 5.3 cm and a length of 18.8 cm. One end has an electron-emitting photocathode connected to the scintillator 2 , and the other end is provided with multiple dynodes installed in the PMT base 6 . The photomultiplier tube 1 and the PMT base 6 constitute a PMT assembly.
[0025] The PMT base 6 matches th...
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The invention discloses a connection and protection device for a photo-multiplier tube detector. The device comprises a photo-multiplier tube (PMT), wherein one end of the PMT is arranged in a PMT base to form a PMT component; the other end of the PMT is connected with a scintillator to form a PMT detector; a PMT-scintillator coupling body is arranged at a joint of the PMT and the scintillator; and the PMT and the scintillator are placed on a PMT bracket. The PMT is firmly, stably and closely connected with the scintillator by the PMT-scintillator coupling body, contact faces and optical coupling agents of the PMT and the scintillator are protected; furthermore, the PMT and the scintillator are placed on the PMT bracket, so that the level states of the PMT and the scintillator are kept; therefore, the optical coupling agents are difficult to fall down, and the optical transmission efficiency and the detection efficiency are improved.
Description
technical field [0001] The invention relates to a photomultiplier tube detector, in particular to a photomultiplier tube detector connection protection device. Background technique [0002] Photomultiplier tube PMT (Photo-Multiplier Tube) is widely used in various scientific experiments and engineering measurements as a high-sensitivity photodetection device. It is connected with the scintillator as the detection medium through an optical coupling agent to form a photomultiplier tube detector, which can convert very weak or even single photon signals generated by various scintillator detectors into electronic pulse signals with satisfactory amplitudes. The sum signal size represents the generation moment of the light pulse and the number of photons. However, the photomultiplier tube is a very fragile device that is afraid of light and magnetism. It needs careful protection and precise connection with the detection medium to exert its high sensitivity and high stability. ...
Claims
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IPC IPC(8): G01T1/208
Inventor 葛愉成
Owner PEKING UNIV