Object movement measurement device - for object moving inside enclosed space, uses radiation from radioactive source

摘要

A radioactive radiation source outside the vessel emits its radiation across the moving object path, and a receiver sensitive to this radiation is placed on the other side of the vessel so that object movement within the radiation zone is recorded; the radiation source if Cs137, and the receiver is a NaIT1 crystal; the crystal is electrically connected to a photomultiplier with an output for the anode current evaluation; in order to reduce the time constant of the device several radiation sources are placed next to each other.