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> Photomultiplier tube feu-52 (ussr – 1970). very rare
Photomultiplier tube feu-52 (ussr – 1970). very rare
PHOTOMULTIPLIER TUBE FEU-52 ( -52 RU)
Photomultiplier - amplifier of weak photocurrents, whose action is based on a secondary emission. This device is used for the registration of weak electromagnetic radiation of optical range. Measured luminous flux through the window falls on the working cathode, extracting electrons (photoelectric effect). The resulting photocurrent is directly proportional to the radiation power. Thanks to the original design, strengthening the weak signal can reach millions of times (up to eight orders of magnitude). To do this, the anode voltage is applied from the high-voltage source - from 500 to 1500 V with a voltage divider. The potential distribution between the electrodes evenly: 100 B on the cascade. Focusing electrode, it concentrates the flow of electrons in the direction of acceleration.
In the case of the electronic device clearly marking: name of the model, year and the logo of the manufacturer
