VERSTAERKUNGSGRADSTABILISATOR FUER PHOTOVERVIELFACHER.

摘要

The amplification stabilising device is for photomultipler tubes in a system in which amplifiers (4) receive the light of photomultiplier tubes (3) in an array behind a scintillator and a position detector (5) uses the output of these amplifiers and emits a signal indicating a scintillator light emission position. The photomultiplier tubes are divided into different gpts. The outputs of the amplifiers for each gp. are summed (6; SUM A-D). The position signal (5) is used to determine which photomultiplier tube is closest to the light emission piont and the summed signals of the gp. to which this photomultiplier tube belongs are subjected to peak analysis (14) to provide statistical data relating to the amplifiers of the gp. concerned. This is done for the different gps. and the data obtained is used to control the photomultiplier tube amplifiers.