A logarithmic detection system suitable for a 4π array

Details A logarithmic detection system suitable for a 4π array A logarithmic detection system suitable for a 4π array

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985nimpa.238..347w&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 238, Issue 2-3, p. 347-353.

Physics

90

Scientific paper

A low pressure multiwire proportional counter, a Bragg curve counter, and an array of CaF2/plastic scintillator telescopes have been developed in a geometry suitable for close packing into a 4π detector designed to study nucleus-nucleus reactions at 100-200 MeV/nucleon. The multiwire counter is hexagonal in shape and gives X-Y position information using resistive charge division from nichrome-coated stretched polypropylene foils. The Bragg curve counter is a hexagonal pyramid with the charge taken from a Frisch gridded anode. A field shaping grid gives the Bragg curve counter a radial field. The scintillator telescopes are shaped as truncated triangular pyramids such that when stacked together they form a truncated hexagonal pyramid. The light signal of the CaF2-plastic combination is read with one phototube using a phoswich technique to separate the ΔE signal from the E signal. The entire system has been tested so far for particles with 1 <= Z <= 18 and gives good position, charge, and time resolution.

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