Study of Multiparticle Proton-Proton Interactions from 100 GeV/c to 400 GeV/c with a 30-Inch Bubble Chamber - Optical Spark Chamber Hybrid System

We propose to study multiparticle p-p interactions at 100 - 400 GeV/c with the 30-inch hydrogen bubble chamber and an associated spark chamber detector. 6 We request 0.5 X 10 bubble chamber pictures with a widegap optical spark chamber - galTITla ray detector system downstream of the bubble chamber. For later running, we request an additional 0.5 X 106 pictures including a downstream analysing magnet. The detector system is designed to provide accurate bubble chamber data on all charged particles with momenta below ~ 20 GeV/c, comparably accurate optical spark chamber data on downstream particles above ~ 20 GeV/c, and infonnation on very forward neutral particles decaying into gamma-rays. The primary aim of this experiment is a study of particle distributions from 1RL1ltiparticle final states produced at a variety of energies in order to test the concept of limiting fragmentation and other models of current interest.

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Spokesperson: Gerald A. Smith

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