FAST ANALYSIS SYSTEM FOR BUBBLE CHAMBER DATA

Technical Report · Fri Jan 25 04:00:00 EST 1963

DOI:https://doi.org/10.2172/4754226· OSTI ID:4754226

Hough, P. V.C.

A type of precision measuring instrument, a flying spot digitizer, for the analysis of bubble chamber data is described. When the flying spot encounters a bubble image, it is attenuated typically 25 to 75% depending on the directness of hit and the bubble chamber photographic and operating parameters. The width of the bell-shaped attenuation curve is approximates the sum of the spot and bubble image diameters, or 40 to 50 mu . The high precision of the FSD derives from the fact that it is possible to find the center of area of the attenuation curve to a standard deviation of 3 to 4 mu out of the much larger full-width at the base. Each flying spot coordinate is of a precision approximates equal to that given by a measuring projector, but typically 16 flying spot points are obtained to one measuring-projector point, so that the effective error is only 1/4 as large. The digital electronics problem associated with a flying spot digitizer is basically the trapping of the grating count at the time a bubble image center is found, the storage of the number temporarily until the computer is free, and then the transmission of the coordinate to the computer. (H.G.G.)

• Research Organization: Brookhaven National Lab., Upton, N.Y.
• DOE Contract Number: AT(30-2)-GEN-16
• NSA Number: NSA-17-016419
• OSTI ID: 4754226
• Report Number(s): BNL-6871
• Country of Publication: United States
• Language: English

Related Subjects

BUBBLE CHAMBERS
COMPUTERS
DIGITAL SYSTEMS
ELECTRONIC EQUIPMENT
IMAGES
INSTRUMENTS AND INSTRUMENTATION
PHOTOGRAPHY
TRANSDUCERS