Simulations of the isochronous mass spectrometry at the HIRFL-CSR

R.J. Chen , Y.J. Yuan (1) , M. Wang , X. Xu (2) , P. Shuai , Y.H. Zhang , X.L. Yan , Y.M. Xing , H.S. Xu , X.H. Zhou , Y.A. Livinov , S. Litvinov , X.C. Chen , C.Y. Fu , W.W. Ge , Z. Ge , X.J. Hu , W.J. Huang (2) , D.W. Liu , Q. Zeng , W. Zhang

1 LCPMR - Laboratoire de Chimie Physique - Matière et Rayonnement
2 CSNSM SNO - Centre de Sciences Nucléaires et de Sciences de la Matière

A Monte-Carlo simulation code, named as SimCSR, has been developed for the isochronous mass spectrometry experiments in the experimental storage ring (CSRe). The revolution times of the fragments ions stored in the CSRe, which were produced in the fragmentation of Ni-58 primary beam are reproduced very well by the SimCSR, although only linear components are considered. The standard deviation of the revolution time is found to be strongly affected by the phase slip factor, the width of the relative momentum difference and the instability of magnetic field. Based on the simulations, we outline and discuss the methods to reduce the standard deviation of the revolution time.

Mots clés: storage ring; exotic nuclei; isochronous mass spectrometry (IMS); beteron motion; revolution time

Domaines: Physique [physics]; Physique Nucléaire Expérimentale [nucl-ex]

R.J. Chen, Y.J. Yuan, M. Wang, X. Xu, P. Shuai, et al.. Simulations of the isochronous mass spectrometry at the HIRFL-CSR. Physica Scripta, 2015, T166, pp.014044. ⟨10.1088/0031-8949/2015/T166/014044⟩. ⟨in2p3-01276319⟩