End magnets with rare earth permanent magnet material for a compact race-track microtronI. Y. Vladimirov, N. I. Pakhomov, V. I. Shvedunov, Y. A. Kubyshin, J. P. Rigla and V. V. ZakharovEur. Phys. J. Plus, 129 12 (2014) 271DOI: https://doi.org/10.1140/epjp/i2014-14271-3