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TY - CONF AU - Kwon, S. AU - Castellano, L.J. AU - Knapp, D.J. AU - Lyles, J.T.M. AU - Prokop, M.S. AU - Scheinker, A. AU - Torrez, P.A. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - A New Digital Feedback and Feedforward Controller for Cavity Field Control of the LANSCE Accelerator J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - A new digital low-level RF system was designed and has been deployed on the drift-tube-linac section of the Los Alamos Neutron Science Center(LANSCE) proton accelerator. This new system is part of a modernization of the existing analog cavity-field controls that were originally developed and put into service forty-five years ago. For stabilization of the cavity field amplitude and phase during beam loading, a proportional-integral feedback controller, a static beam feedforward controller, and an iterative learning controller working in parallel have been implemented. In this paper, the controller architecture is described, and the performances of the three controllers when beam is being actively accelerated is presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2277 EP - 2280 KW - controls KW - cavity KW - feedback KW - LLRF KW - FPGA DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-WEPAL046 UR - http://jacow.org/ipac2018/papers/wepal046.pdf ER -