SELECTIVE PHOTOGRAPHY IN SPARK CHAMBERS : MICROSECOND DECISION-MAKING AND REFIRING

Author: Park, R. M.
Published: United States : [publisher not identified], 1964.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1964.
Physical Description: microfiche : negative ; 8 x 13 cm

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Summary

S>A procedure was developed for selectively extending the memory of a spark chamber for periods of>40 mu sec while still maintaining sensitive times below 1 mu sec. In this procedure, the spark chamber is fired with the usual fast logic but with a relatively low voltage pulse producing a discharge below photographic threshold. If a positive decision is then made with the slow logic, the chamber is fired again at a normal high voltage to produce a photographic image. The method is demonstrated using two spark chambers and cosmic ray tracks. The conditions affecting spark quality were studied briefly. (D.L.C.)

Report Numbers

TID-19841

Other Subject(s)

Collection

U.S. Atomic Energy Commission depository collection.

Note

DOE contract number: AT(30-1)-2098
NSA number: NSA-18-007057
OSTI Identifier 4118746
Research organization: Massachusetts Inst. of Tech., Cambridge. Lab. for Nuclear Science.

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