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TY - CONF AU - Naranjo, B. AU - Andonian, G. AU - Fukasawa, A. AU - Lynn, W.J. AU - Majernik, N. AU - Rosenzweig, J.B. AU - Sakai, Y. AU - Williams, O. AU - Yadav, M. AU - Zhuang, Y. ED - Liu, Lin ED - Byrd, John M. ED - Neuenschwander, Regis T. ED - Picoreti, Renan ED - Schaa, Volker R. W. TI - Compton Spectrometer for FACET-II J2 - Proc. of IPAC2021, Campinas, SP, Brazil, 24-28 May 2021 CY - Campinas, SP, Brazil T2 - International Particle Accelerator Conference T3 - 12 LA - english AB - We present the design of a Compton spectrometer for use at FACET-II. A sextupole is used for magnetic spectral analysis, giving a broad dynamic range (180 keV through 28 MeV) and the capability to capture an energy-angular double-differential spectrum in a single shot. At low gamma energies, below 1 MeV, Compton spectroscopy becomes increasingly challenging as the scattering cross-section becomes more isotropic. To extend the range of the spectrometer down to around 180 keV, we use a 3D-printed tungsten collimator at the detector plane to preferentially select forward-scattered electrons at the Compton edge. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4332 EP - 4335 KW - electron KW - detector KW - simulation KW - plasma KW - wakefield DA - 2021/08 PY - 2021 SN - 2673-5490 SN - 978-3-95450-214-1 DO - doi:10.18429/JACoW-IPAC2021-THPAB269 UR - https://jacow.org/ipac2021/papers/thpab269.pdf ER -