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) {\mu}m 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.
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http://hal.in2p3.fr/in2p3-01250056
Contributor : Michel Lion <>
Submitted on : Monday, January 4, 2016 - 11:49:22 AM
Last modification on : Wednesday, April 4, 2018 - 7:58:02 AM

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M. Vandebrouck, A. Lemasson, M. Rejmund, G. Frémont, J. Pancin, et al.. Dual Position Sensitive MWPC for tracking reaction products at VAMOS++. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2016, 812, pp.112-117. ⟨10.1016/j.nima.2015.12.040⟩. ⟨in2p3-01250056⟩

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