Accession Number : AD0617032

Title :   DECISION-MAKING SPARK CHAMBERS,

Corporate Author : CHICAGO UNIV ILL ENRICO FERMI INST FOR NUCLEAR STUDIES

Personal Author(s) : Parker,Ch. Rey. S. ; Sherwood,B. ; Schwartz,D.

Report Date : 23 JUL 1964

Pagination or Media Count : 7

Abstract : A wire spark chamber was developed in which information can be analyzed within 30 to 50 nsec of the spark time and used to trigger other spark chambers for a more detailed analysis of the same event. The wire chamber system has good spatial resolution, very low mass, a recovery time of less than 1 msec and a fast, low impedance output capable of driving versatile core arrays. By running the wires in simple patterns through core arrays, it is possible to get signals whose pulse height is proportional to such things as the number of sparks, the number with more than some minimum separation, the position of a spark and the separation of two sparks. Many other kinds of spatial decisions can be made with these devices such as the recognition of scattering of a particle and coplanarity of two particles. Decision-making spark chambers are used to trigger an optical spark chamber of two track events. Wires were grouped together at the outputs to give 1 cm spatial resolution. The observed single track efficiency for one gap was greater than 99% and the double track efficiency was greater than 97%. (Author)

Descriptors :   (*RADIATION MEASURING INSTRUMENTS, COMPUTER LOGIC), (*COMPUTER LOGIC, RADIATION MEASURING INSTRUMENTS), WIRING DIAGRAMS, DATA PROCESSING, MAGNETIC CORES, TRIGGER CIRCUITS, PULSE ANALYZERS, SERVOMECHANISMS, NUCLEAR PHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE