Position-Sensitive Detectors

Many physical experiments are based on the detection of fluxes of various particles: ions, electrons, photons. However, in some experiments it is not enough to detect individual particles, but it is necessary to determine the coordinates of arrival of each detected particle to the detector. MCPs can be the basis for the construction of position-sensitive detectors (PSDs). Since when a charged particle or a photon impacts the input surface of the first plate, it creates an avalanche of electrons localized in one channel, and as a result of the subsequent conversion of the primary charge using a special form electron collector, prompt current pulses are induced in the circuits of the collector elements. The totality of these pulses is fed to the input of the electronic system, which in one way or another extracts the positional information contained in this totality. Use of microchannel plates provides sufficiently high spatial resolution and compactness.

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