A LOGARITHMIC DETECTION SYSTEM SUITABLE FOR A 4 PI ARRAY

Westfall, G.D.; Yurkon, J.E.; Van Der Plicht, J.; Konig, Z.M.; Jacak, B.V.; Fox, R.; Crawley, G.M.; Maier, M.R.; Hasselquist, B.E.; Tickle, R.S.

doi:10.1016/0168-9002(85)90472-3

A LOGARITHMIC DETECTION SYSTEM SUITABLE FOR A 4 PI ARRAY

G.D. Westfall
(
- Michigan State U.
)
,
J.E. Yurkon
(
- Michigan State U.
)
,
J. Van Der Plicht
(
- Michigan State U.
)
,
Z.M. Konig
(
- Michigan State U.
)
,
B.V. Jacak
(
- Michigan State U.
)

1985

7 pages

Published in:

Nucl.Instrum.Meth.A 238 (1985) 347-353

DOI:

10.1016/0168-9002(85)90472-3

View in:

Nuclear Science References

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Abstract: (Elsevier)

A low pressure multiwire proportional counter, a Bragg curve counter, and an array of CaF 2 /plastic scintillator telescopes have been developed in a geometry suitable for close packing into a 4 π 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 CaF 2 -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.

PROPORTIONAL CHAMBER: TIME RESOLUTION
IONIZATION CHAMBER
CHARGE: READOUT
SCINTILLATION COUNTER: PLASTICS
SCINTILLATION COUNTER: READOUT
PERFORMANCE
FOUR-PI-DETECTOR: PROPOSED

References(27)

Figures(0)

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