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TY - UNPB AU - Zangrando, M. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Photon Beam Transport and Diagnostics Systems at an EUV FEL Facility: General Considerations, and Specific Challenges, Solutions and Developments at the FERMI Seeded FEL J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017 C1 - Santa Fe, NM, USA T2 - International Free Electron Laser Conference T3 - 38 LA - english AB - After the start of FLASH user operations in 2005, the possibility of performing user experiments at an EUV free electron laser source became reality. This kind of opportunity was extended in 2012 when the Italian FERMI seeded-FEL user facility started its user program. As a consequence, for such light sources new photon transport and diagnostic solutions were designed, developed, and implemented. A brief general overview about these issues will be introduced, together with a more detailed presentation of challenges faced and solutions found at the FERMI FEL. In particular, different instruments were developed in order to meet machine and endstation users' requirements concerning online non-invasive spectral content determination, pulse length and intensity characterization/control, active modification of the focusing properties, etc. Some examples and results will be presented, possibly comparing them to what was done elsewhere. Possible future implementations in photon-beam manipulation and characterisation will also be discussed. PB - JACoW CP - Geneva, Switzerland ER -