[en] The pointer is situated at right angles to a disc which can be rotated through the radiation field. The rotary movement of the disc takes place via a shaft, whose drive is from a turbine wheel situated on the shaft. The turbine wheel is driven with the cooling water for the disc. (orig.)
Original Title
Vorrichtung zur Messung der axialen Stromverteilung des Strahls eines Isochron-Zyklotrons