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@inproceedings{naranjo:ipac2021-thpab270,
author = {B. Naranjo and G. Andonian and N. Cavanagh and A. Di Piazza and A. Fukasawa and E. Gerstmayr and R. Holtzapple and C.H. Keitel and N. Majernik and S. Meuren and C. Nielsen and M.H. Oruganti and D.A. Reis and J.B. Rosenzweig and Y. Sakai and G. Sarri and D.W. Storey and O. Williams and M. Yadav and V. Yakimenko},
% author = {B. Naranjo and G. Andonian and N. Cavanagh and A. Di Piazza and A. Fukasawa and E. Gerstmayr and others},
% author = {B. Naranjo and others},
title = {{Pair Spectrometer for FACET-II}},
booktitle = {Proc. IPAC'21},
pages = {4336--4339},
eid = {THPAB270},
language = {english},
keywords = {electron, positron, scattering, detector, photon},
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-THPAB270},
url = {https://jacow.org/ipac2021/papers/thpab270.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-THPAB270},
abstract = {{We present the design of a pair spectrometer for use at FACET-II, where there is a need for spectroscopy of photons having energies up to 10 GeV. Incoming gammas are converted to high-energy positron-electron pairs, which are then subsequently analyzed in a dipole magnet. These charged particles are then recorded in arrays of acrylic Cherenkov counters, which are significantly less sensitive to background x-rays than scintillator counters in this case. To reconstruct energies of single high-energy photons, the spectrometer has a sensitivity to single positron-electron pairs. Even in this single-photon limit, there is always some low-energy continuum present, so spectral deconvolution is not trivial, for which we demonstrate a maximum likelihood reconstruction. Finally, end-to-end simulations of experimental scenarios, together with anticipated backgrounds, are presented.}},
}