APEX heavy ion counters

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Abstract

A large solid-angle array of low pressure multiwire proportional counters has been constructed as part of the Atlas Positron EXperiment (APEX). Eight three-element trapezoidal counters provide 360° coverage in φ and 20°–68° coverage in θ. Angle sensitivity in θ is provided by a transmission-line delay cathode, while the segmentation provides angle sensitivity in φ. Sample data are presented from the 1450 MeV 238U + 181Ta reaction.

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Cited by (1)

  • A solenoidal spectrometer for positron-electron pairs produced in heavy-ion collisions

    1996, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
1

Present address: nano-Optics, Inc., P.O. Box 98, Ithaca, NY 14851, USA.

2

Present address: GANIL, BP 5027, 14201 Caen Cedex, France.

3

Present address: Nuclear Science Centre, New Delhi, 110 067 India.

Corresponding author.

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