Tracking Chamber Research Articles

Instruments for the analysis of track chamber photographs by digital computer

Instruments for the analysis of track chamber photographs by digital computer

C. Photometric measurement of ionization in cloud chambers

Abstract It has been found possible to measure the ionization of a cloud chamber track by photometry of the chamber photograph. The method is applicable to tracks, the photographic images of which consist of unresolved drop images. Its application does not interfere with accurate measurement of the magnetic rigidity of the particle causing the track. The use of the method has been investigated by studying tracks in a typical chamber and is illustrated by mass measurements on 3 K-mesons. The relative merits of this photometric method and the drop counting method of measuring ionization are discussed.