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TY - CONF AU - Schließmann, F. AU - Arnold, M. AU - Dutine, M. AU - Pietralla, N. ED - Schaa, Volker RW ED - Jansson, Andreas ED - Shea, Thomas ED - Olander, Johan TI - Determination of the Momentum Spread While Running in the ERL Mode at the S-DALINAC* J2 - Proc. of IBIC2019, Malmö, Sweden, 08-12 September 2019 CY - Malmö, Sweden T2 - International Beam Instrumentation Conferenc T3 - 8 LA - english AB - The recirculating superconducting electron accelerator S-DALINAC  at TU Darmstadt is capable to run as a onefold or twofold Energy Recovery Linac (ERL) with a maximum energy of approximately 34 or 68 MeV in ERL mode, respectively. After the final acceleration in ERL mode, the momentum spread at the intended interaction point has to be determined. In order to investigate that momentum spread, a nondestructive measurement method is necessary. For this reason, it is planned to expand the beam horizontally in a section close to the interaction point by providing a well-defined horizontal dispersion. Using a wire scanner in this section for measuring the horizontal profile of the electron distribution, one can determine the momentum spread. The method of determining the momentum spread using the horizontal dispersion and the design of the wire scanner will be presented in this contribution. PB - JACoW Publishing CP - Geneva, Switzerland SP - 295 EP - 298 KW - linac KW - electron KW - recirculation KW - quadrupole KW - radiation DA - 2019/11 PY - 2019 SN - 978-3-95450-204-2 DO - doi:10.18429/JACoW-IBIC2019-TUPP009 UR - http://jacow.org/ibic2019/papers/tupp009.pdf ER -