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TY - CONF AU - Kurennoy, S.S. AU - Batygin, Y.K. ED - McIntosh, Peter ED - Burt, Graeme ED - Apsimon, Robert ED - Schaa, Volker R.W. TI - CST Modeling of the LANSCE Coupled-Cavity Linac J2 - Proc. of LINAC2022, Liverpool, UK, 28 August-02 September 2022 CY - Liverpool, UK T2 - International Linear Accelerator Conference T3 - 31 LA - english AB - The 800-MeV proton linac at LANSCE consists of a drift-tube linac, which brings the beam to 100 MeV, followed by 44 modules of a coupled-cavity linac (CCL). Each CCL module contains multiple tanks, and it is fed by a single 805-MHz klystron. CCL tanks are multi-cell blocks of identical re-entrant side-coupled cavities, which are followed by drifts with magnetic quadrupole doublets. Bridge couplers - special cavities displaced from the beam axis - electromagnetically couple CCL tanks over such drifts within a module. We have developed 3D CST models of CCL tanks. The models are used to calculate electromagnetic fields in the tanks. Beam dynamics is modelled in CST for bunch trains with realistic beam distributions using the calculated RF fields and quadrupole magnetic fields. Beam dynamics results are crosschecked with other multi-particle codes and applied to evaluate effects of CCL misalignments. PB - JACoW Publishing CP - Geneva, Switzerland SP - 191 EP - 193 KW - cavity KW - alignment KW - linac KW - quadrupole KW - emittance DA - 2022/09 PY - 2022 SN - 2226-0366 SN - 978-3-95450-215-8 DO - doi:10.18429/JACoW-LINAC2022-MOPOGE17 UR - https://jacow.org/linac2022/papers/mopoge17.pdf ER -