Accession Number : AD0621299

Title :   USE OF A LARGE GAP SPARK CHAMBER IN AN INTENSE BEAM OF PARTICLES,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS CYCLOTRON LAB

Personal Author(s) : Knasel,T. M. ; Walker,J. K. ; Wong,M.

Report Date : 13 NOV 1964

Pagination or Media Count : 2

Abstract : An application is considered where a beam of charged particles is passed through a large gap spark chamber. It is shown that the use of helium gas contained in a thin plastic bag in the region of the beam can reduce the efficiency of the spark chamber, in that region, to as little as 0.000001 or less. The efficiency for track detection outside this region is maintained at 100% with the use of a gas mixture of 89% neon, 10% helium, and 1% argon. (Author)

Descriptors :   (*CHARGED PARTICLES, RADIATION MEASURING INSTRUMENTS), (*RADIATION MEASURING INSTRUMENTS, CHARGED PARTICLES), PROTON BEAMS, NEON, HELIUM, ARGON

Distribution Statement : APPROVED FOR PUBLIC RELEASE