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TY - CONF AU - Veronese, M. AU - Abrami, A. AU - Bossi, M. AU - Ferianis, M. AU - Grulja, S. AU - Penco, G. AU - Tudor, M. ED - Schaa, Volker RW ED - Jansson, Andreas ED - Shea, Thomas ED - Olander, Johan TI - New Combined Function Wire Scanner-Screen Station for the High Resolution Transverse Profile Measurements at FERMI J2 - Proc. of IBIC2019, Malmö, Sweden, 08-12 September 2019 CY - Malmö, Sweden T2 - International Beam Instrumentation Conferenc T3 - 8 LA - english AB - We present the upgrade of the transverse profile diagnostics at the end of the FERMI Linac with a new high resolution instrumentation with the aim of improving the accuracy of the measurement of the twiss parameters and of the emittance. A scintillating screen, has been adopted instead of OTR screen due to known COTR issues. We used the same COTR suppression geometry that we had already implemented on our intra undulator screens and YAG:Ce as scintillating material. Screen based transverse profile diagnostics provide single shot measurements with a typical resolution of the order of tens of microns mainly due to refraction effects, geometry and other physical material properties. To extend the resolution to the micron level needed in case of low charge operation, we have equipped the same vacuum chamber with a wire scanner housing 10 micron tungsten wires. This paper describes the design and the first operational experience with the new device and discusses advantages as well as limitations. PB - JACoW Publishing CP - Geneva, Switzerland SP - 322 EP - 325 KW - electron KW - FEL KW - vacuum KW - operation KW - laser DA - 2019/11 PY - 2019 SN - 2673-5350 SN - 978-3-95450-204-2 DO - doi:10.18429/JACoW-IBIC2019-TUPP014 UR - http://jacow.org/ibic2019/papers/tupp014.pdf ER -