A SEMI-AUTOMATIC ANALYSER FOR BUBBLE CHAMBER PHOTOGRAPHS

Journal Article · Sat Oct 01 04:00:00 EDT 1960 · Nuclear Instr. & Methods

DOI:https://doi.org/10.1016/0029-554X(60)90053-7· OSTI ID:4100722

Frisch, O R; Oxley, A J

Photographs of nuclear particle tracks can be accumulated rapidly with fast-cycling bubble chambers. This article describes a machine for measuring the photographs quickly so that the subsequeni computations can be done with an electronic computer. The films are projected onto a ground glass screen bearing a reference mark, and moved by hand through a pantograph to bring interesting points onto the mark. The pantograph carries a plate with a fine square lattice of dots, and four photocells serve to digitize its X and Y coordinates. The two stereoscopic images of a point can be merged by moving one of the projection lenses; this motion also is digitized photoelectri cally. After setting each point, the measured data are punched on tape, to be fed later to an electronic computer. The design, operation, and performance of the machine are described in some detail, together with the principles of measurement and some proposed improvements. (auth)

• Research Organization: Cavendish Lab., Cambridge, Eng.
• NSA Number: NSA-15-006154
• OSTI ID: 4100722
• Journal Information: Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 9
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BUBBLE CHAMBERS
COMPUTERS
ELECTRONICS
ENGINEERING AND EQUIPMENT
FILMS
INSTRUMENTS
MEASURED VALUES
PARTICLE TRACKS
PERFORMANCE
PHOTOELECTRIC CELLS
PHOTOGRAPHY
PLANNING