Transmission Efficiency of the Recoil Mass Spectrometer EMMA at TRIUMF
Instrumentation and Detectors
2026-05-05 v2 Nuclear Experiment
Abstract
The mean transmission efficiency of the EMMA recoil mass spectrometer at TRIUMF has been measured with 6 different angular apertures at 17 kinetic energy/charge deviations with respect to the central, reference trajectory. Measurements performed using a 148Gd alpha source installed at the target position of the spectrometer are compared to ion-optical calculations and Monte Carlo simulations. The transmission efficiency as a function of angle and kinetic energy/charge is described empirically using piecewise Gaussian functions whose parameters are fit to the data.
Cite
@article{arxiv.2511.05643,
title = {Transmission Efficiency of the Recoil Mass Spectrometer EMMA at TRIUMF},
author = {B. Davids and N. E. Esker and J. Jaeyoung and Y. K. Kim and K. Pak and M. Williams},
journal= {arXiv preprint arXiv:2511.05643},
year = {2026}
}
Comments
18 pages, 17 figures, revised version with fewer typographical errors accepted for publication in Nucl. Instrum. Meth. Phys. Res. A