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Novel transmission detector used for total cross section measurements
Journal article   Peer reviewed

Novel transmission detector used for total cross section measurements

M Arignon, A Martin, C.R Newsom, H Azaiez, Y Onel, J Bystricky, A Penzo, J.E Simmons, J Deregel, P Drompt, …
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, Vol.235(3), pp.523-535
1985
DOI: 10.1016/0168-9002(85)90103-2

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Abstract

A new apparatus for total cross section measurements was developed and tested at Saturne II, Sacalay. The transmission ratios are determined using a ring-counter system coded in the Gray code, involving an exclusive four-fold coincidence between 4 counters among 8. Beam rate effects are suppressed by an electronic device which permits reaching an accuracy of better than 10 −4 in any transmission ratio. The apparatus was first used at SIN for the measurements of the total polarized proton-proton cross section difference Δσ L and of the spin correlation parameter A 00 kk in pp → pp and pp → dπ + reactions, and then at Saturne II for Δσ γ and Δσ L measurements in p-p scattering.

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