Dual Position Sensitive MWPC for tracking reaction products at VAMOS++

Abstract

The characteristics and performance of a Dual Position Sensitive Multi-Wire Proportional Counter (DPS-MWPC) used to measure the scattering angle, interaction position on the target and the velocity of reaction products, detected in the VAMOS++ magnetic spectrometer, are reported. The detector consists of a pair of position sensitive low pressure MWPCs and provides both fast timing signals, along with the two-dimensional position coordinates required to define the trajectory of the reaction products. A time-of-flight resolution of 305(11) ps (FWHM) was measured. The measured resolutions (FWHM) were 2.5(3) mrad and 560(70) μm for the scattering angle and the interaction point at the target respectively. The subsequent improvement of the Doppler correction of the energy of the gamma-rays, detected in the gamma-ray tracking array AGATA in coincidence with isotopically identified ions in VAMOS++, is also discussed.

Accepted for publication in Nuclear Inst. and Methods in Physics Research, A

References in corpus (3)

• Development of Parallel Plate Avalanche Counter PPAC for BigRIPS fragment separator
• Characterization of the scission point from fission-fragment velocities
• Migration of nuclear shell gaps studied in the d(24Ne,p gamma)25Ne reaction

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