Beam Dynamics for a High Field C-Band Hybrid Photoinjector

Faillace, Luigi; Agustsson, Ronald; Behtouei, Mostafa; Bosco, Fabio; Carillo, Martina; Fukasawa, Atsushi; Gadjev, Ivan; Giribono, Anna; Giuliano, Lucia; Kutsaev, Sergey; Majernik, Nathan; Migliorati, Mauro; Mostacci, Andrea; Murokh, Alex; Palumbo, Luigi; Rosenzweig, James; Spataro, Bruno; Tantawi, Sami; Vaccarezza, Cristina; Williams, Oliver

doi:10.18429/JACoW-IPAC2021-WEPAB051

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RIS citation export for WEPAB051: Beam Dynamics for a High Field C-Band Hybrid Photoinjector

TY  - CONF
AU  - Faillace, L.
AU  - Agustsson, R.B.
AU  - Behtouei, M.
AU  - Bosco, F.
AU  - Carillo, M.
AU  - Fukasawa, A.
AU  - Gadjev, I.I.
AU  - Giribono, A.
AU  - Giuliano, L.
AU  - Kutsaev, S.V.
AU  - Majernik, N.
AU  - Migliorati, M.
AU  - Mostacci, A.
AU  - Murokh, A.Y.
AU  - Palumbo, L.
AU  - Rosenzweig, J.B.
AU  - Spataro, B.
AU  - Tantawi, S.G.
AU  - Vaccarezza, C.
AU  - Williams, O.
ED  - Liu, Lin
ED  - Byrd, John M.
ED  - Neuenschwander, Regis T.
ED  - Picoreti, Renan
ED  - Schaa, Volker R. W.
TI  - Beam Dynamics for a High Field C-Band Hybrid Photoinjector
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  - In this paper, we present a new class of a hybrid photoinjector in C-Band. This project is the effort result of a UCLA/Sapienza/INFN-LNF/SLAC/RadiaBeam collaboration. This device is an integrated structure consisting of an initial standing-wave 2.5-cell gun connected to a traveling-wave section at the input coupler. Such a scheme nearly avoids power reflection back to the klystron, removing the need for a high-power circulator. It also introduces strong velocity bunching due to a 90° phase shift in the accelerating field. A relatively high cathode electric field of 120 MV/m produces a ~4 MeV beam with ~20 MW input RF power in a small foot-print. The beam transverse dynamics are controlled with a ~0.27 T focusing solenoid. We show the simulation results of the RF/magnetic design and the optimized beam dynamics that shows 6D phase space compensation at 250 pC. Proper beam shaping at the cathode yields a ~0.5 mm-mrad transverse emittance. A beam waist occurs simultaneously with a longitudinal focus of <400 fs rms and peak current >600 A. We discuss application of this injector to an Inverse-Compton Scattering system and present corresponding start-to-end beam dynamics simulations.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2714
EP  - 2717
KW  - electron
KW  - emittance
KW  - cathode
KW  - linac
KW  - gun
DA  - 2021/08
PY  - 2021
SN  - 2673-5490
SN  - 978-3-95450-214-1
DO  - doi:10.18429/JACoW-IPAC2021-WEPAB051
UR  - https://jacow.org/ipac2021/papers/wepab051.pdf
ER  -