Simulation of the SAGE spectrometer D. M. Cox, J. Konki, P. T. Greenlees, K. Hauschild, R. -D. Herzberg, J. Pakarinen, P. Papadakis, P. Rahkila, M. Sandzelius and J. Sorri Eur. Phys. J. A, 51 6 (2015) 64 Published online: 10 June 2015 DOI: 10.1140/epja/i2015-15064-5