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@inproceedings{naranjo:ipac2021-thpab269, author = {B. Naranjo and G. Andonian and A. Fukasawa and W.J. Lynn and N. Majernik and J.B. Rosenzweig and Y. Sakai and O. Williams and M. Yadav and Y. Zhuang}, % author = {B. Naranjo and G. Andonian and A. Fukasawa and W.J. Lynn and N. Majernik and J.B. Rosenzweig and others}, % author = {B. Naranjo and others}, title = {{Compton Spectrometer for FACET-II}}, booktitle = {Proc. IPAC'21}, pages = {4332--4335}, eid = {THPAB269}, language = {english}, keywords = {electron, detector, simulation, plasma, wakefield}, venue = {Campinas, SP, Brazil}, series = {International Particle Accelerator Conference}, number = {12}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {08}, year = {2021}, issn = {2673-5490}, isbn = {978-3-95450-214-1}, doi = {10.18429/JACoW-IPAC2021-THPAB269}, url = {https://jacow.org/ipac2021/papers/thpab269.pdf}, note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB269}, abstract = {{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.}}, }