FIELD: physics.
SUBSTANCE: photomultiplier tube has a photocathode (14), an electron multiplier(10), an electron collector (11) and a lead (12), in which the photocathode (14) and the electron multiplier (10) are placed in a sealed transparent vacuum tube (8), the electron collector (11) and the lead (12) are connected to an external loop outside the vacuum tube (8), the photocathode (14) is formed on the entire inner surface of the vacuum tube (8), and the electron multiplier (10) is placed at the inner centre of the vacuum tube (8), in order to receive photoelectrons from the photocathode (14) in all directions to multiply electrons.
EFFECT: high efficiency of detecting a unit area receiving light.
10 cl, 4 dwg
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