Multiplication cluster type photomultiplier

Abstract

The invention provides a multiplication cluster type photomultiplier which solves the problems of large detection dead zone, measurement error caused by individual performance difference and difficulty in accurately adjusting a dynamic range in the current scheme for improving the dynamic range of the photomultiplier. The photomultiplier comprises a vacuum container, an optical input window, a photoelectric cathode, an electron multiplication system, an anode system and a power supply electrode, the electron multiplication system is coaxial with the center of the photoelectric cathode and comprises a plurality of spliced electron multiplication electrodes, each electron multiplication electrode forms an electron multiplication area, and the electron gains of all the electron multiplication areas are different; the area covered by all electron multiplication areas is less than or equal to an effective detection area of the photoelectric cathode; the anode system comprises a plurality of anodes, the number of the anodes is same as that of the electron multiplication electrodes, and the positions of the anodesare in one-to-one correspondence with theelectron multiplication electrodes; the power supply electrode supplies power to the photoelectric cathode, the electron multiplication electrodes and the anodes; the power supply electrode is connected with a vacuum container external power supply system through an electrode lead; and the signal lead-out wire of each anode is connected with an external circuit through a metal wire.

Description

technical field [0001] The invention relates to a photoelectric detection device, in particular to a multiplication cluster type photomultiplier tube which sets different electronic gain regions in the device to realize detection in a large dynamic range. Background technique [0002] Cosmic rays have been leading the development of elementary particle physics since their discovery. People have discovered a large number of elementary particles and composite particles in cosmic rays, such as positrons, muons, π mesons, kaons and other strange particles. It is crucial to create a basic picture of the microscopic world and its interactions. Since the current cosmic ray observations cover 10 9 eV to 10 20 With a wide range of eV, the detector response varies greatly. Therefore, two types of detection technologies, direct detection and indirect detection, are also used for cosmic rays in different energy segments. [0003] In the indirect detection technology, photodetectors a...

AI Technical Summary

Problems solved by technology

[0010] In order to solve the technical problems of large detection dead zone, measurement errors caused by individual performance differences, and difficult accurate adjustment of the dynamic range of photomultiplier tubes in current schemes for improving the dynamic range of photomultiplier tubes, the present invention provides a multiplication cluster photomultiplier tube

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