Fast trajectory reconstruction techniques for the large acceptance magnetic spectrometer VAMOS++

TL;DR

This paper presents three novel trajectory reconstruction methods for the VAMOS++ spectrometer, enhancing the accuracy of heavy ion identification in nuclear physics experiments with improved resolution.

Contribution

It introduces and compares three new trajectory reconstruction techniques tailored for VAMOS++, addressing its non-linear ion optics challenges.

Findings

All methods improve atomic mass resolution.

Performance varies depending on the method used.

Results demonstrate effective trajectory reconstruction for nuclear reaction studies.

Abstract

The large angular and momentum acceptance magnetic spectrometer VAMOS++, at GANIL, France, is frequently used for nuclear structure and reaction dynamics studies. It provides an event-by-event identification of heavy ions produced in nuclear reactions at beam energies around the Coulomb barrier. The highly non-linear ion optics of VAMOS++ requires the use of the heavy ion trajectory reconstruction methods in the spectrometer to obtain the high-resolution definition of the measured atomic mass number. Three different trajectory reconstruction methods, developed and used for VAMOS++, are presented in this work. The performances obtained, in terms of resolution of reconstructed atomic mass number, are demonstrated and discussed using a single data-set of fission fragments detected in the spectrometer.