Tapered helical undulator system for high efficiency energy extraction from a high brightness electron beam
S.V. Kutsaev, R. Agustsson, R. Berry, S. Boucher, D. Bruhwiler, K. Schulze, A.Yu. Smirnov, K. Taletski, Ir-192 radioisotope replacement with a hand-portable 1 MeV Ku-band electron