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  Hall, B.; Neumann, A.; Goebel, F.; Dürr, V.; Knobloch, J.: 120kW RF Power Input Couplers for BERLinPro. In: Gianluigi Arduini ... [Ed.] : IPAC2017 - Proceedings, Copenhagen, Denmark JaCOW, 2017. - ISBN 978-3-95450-182-3, p. MOPVA046/1-4
  http://accelconf.web.cern.ch/AccelConf/ipac2017/papers/mopva046.pdf

Open Access Version

Abstract:
The 50 MeV, 100mA energy-recovery-linac (ERL) demonstration facility bERLinPro is currently undergoing construction at HZB. The high power injection system, that will deliver a beam at 6 MeV, is split into a 1.4 cell SRF photo injector and three Cornell-style 2-cell boosters. The injector and two of the booster cavities will provide about 2 MeV each and must handle up to 220 kW of beam loading. New, cERL-based 115 kW TW high power couplers needed for the cavities’ twin coupler system have begun manufacture. The design, optimization and manufacturing considerations of these couplers are presented.