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TY - CONF AU - Podobedov, B. AU - Bacescu, D.M. AU - Donetski, D. AU - Eng, C. AU - Hulbert, S. AU - Kucharczyk, K. AU - Liu, J. AU - Lutchman, R. AU - Mazzoli, C. AU - Nelson, C.S. AU - Zhao, J. ED - Braun, Hans-Heinrich ED - Chrin, Jan ED - Ganter, Romain ED - Hiller, Nicole ED - Schaa, Volker RW TI - Novel X-ray Beam Position Monitor for Coherent Soft X-ray Beamlines J2 - Proc. of FLS2023, Luzern, Switzerland, 27 August-01 September 2023 CY - Luzern, Switzerland T2 - ICFA Advanced Beam Dynamics Workshop T3 - 67 LA - english AB - A novel soft X-ray BPM (sXBPM) for high-power white beams of synchrotron undulator radiation is being developed through a joint effort of BNL/NSLS-II and Stony Brook University. In our approach, custom-made multi-pixel GaAs detector arrays are placed into the outer portions of the X-ray beam, and the beam position is inferred from the pixel photocurrents. Our goal is to achieve micron-scale positional and ~50 nrad angular resolution without interfering with user experiments, especially the most sensitive ones exploiting coherent properties of the beam. To this end, an elaborate mechanical system has been designed, fabricated, and installed in the 23-ID canted undulator beamline first optical enclosure, which allows positioning of the detectors with micron-scale accuracy, and provisions for possible intercepts of kW-level beam in abnormal conditions. Separately, GaAs detectors with specially tailored spectral response have been designed, fabricated, and tested in the soft and hard X-ray regions at two NSLS-II beamlines. In this talk we plan to give an overview of the sXBPM system and present the first results from the high-power white X-ray beam. PB - JACoW Publishing CP - Geneva, Switzerland SP - 241 EP - 244 KW - detector KW - undulator KW - operation KW - photon KW - vacuum DA - 2024/01 PY - 2024 SN - 2673-7035 SN - 978-3-95450-224-0 DO - doi:10.18429/JACoW-FLS2023-TH3B2 UR - http://jacow.org/fls2023/papers/th3b2.pdf ER -