Part IX. Software, simulations, calculations
Methods of determining the electron drift velocity in drift chambers

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Abstract

A displacement method for measuring electron drift velocities in adjustable-field drift-chambers has been developed and its results have been compared to those of a track-reconstruction method, which uses a least-squares track-fitting procedure and computes drift velocities by iteration. The reconstruction method has been adapted for use with tracks of unknown momentum curved by a magnetic field.

Drift-velocities in a set of chambers fitted with double sense-wires and operating in magnetic fields between zero and 0.8 T have been determined by the two methods. The results agree within the limits of error and show a non-linear time-distance relation.

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