PT Unknown AU Grau, AW Casalbuoni, S Glamann, N Holubek, T Saez de Jauregui, D Boffo, C Gerhard, T Turenne, M Walter, W TI Training and Characterization of 1.5m Long Conduction Cooled Superconducting Undulator Coils with 20 mm Period Length PY 2017 LA english ER