Accession Number : AD0613144

Title :   ACCURACY OF BUBBLE LOCATION IN A BUBBLE CHAMBER,

Corporate Author : WASHINGTON UNIV SEATTLE

Personal Author(s) : Williams,Robert W.

Report Date : 14 SEP 1961

Pagination or Media Count : 3

Abstract : A measurement is reported of individual bubble locations along tracks of high-energy protons in a very small, short time scale pentane bubble chamber. Track distortions of the usual kind are greatly reduced in this system, so that one is measuring, to a precision of a few microns, the deviation of the true centers of the bubbles from the particle path. The average deviation in bubble position measurement is found from second differences to be 3.8 microns in space, most of which is shown to be accounted for by measurement errors. The average bubble is thus found to be centered on the track to better than 4 microns in hydrocarbons; however, an occasional bubble will be off by many times the average deviation. Arguments are advanced to show that a similar precision should obtain in hydrogen. This result is shown to be in general agreement with the bubble-chamber theory of Seitz. (Author)

Descriptors :   (*BUBBLE CHAMBERS, EFFECTIVENESS), BUBBLES, PROTONS, PARTICLE TRAJECTORIES, MEASUREMENT, ERRORS, HYDROCARBONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE