End magnets with rare earth permanent magnet material for a compact race-track microtron I. Y. Vladimirov, N. I. Pakhomov, V. I. Shvedunov, Y. A. Kubyshin, J. P. Rigla and V. V. Zakharov Eur. Phys. J. Plus, 129 12 (2014) 271 Published online: 23 December 2014 DOI: 10.1140/epjp/i2014-14271-3