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RIS citation export for MOPGF093: Real-time Beam Loading Compensation for Single SRF Cavity LLRF Regulation

TY - CONF
AU - Rutkowski, I.
AU - Butkowski, Ł.
AU - Grzegrzólka, M.
AU - Kuntzsch, M.
AU - Schmidt, Ch.
ED - Corvetti, Lou
ED - Riches, Kathleen
ED - Schaa, Volker RW
TI - Real-time Beam Loading Compensation for Single SRF Cavity LLRF Regulation
J2 - Proc. of ICALEPCS2015, Melbourne, Australia, 17-23 October 2015
C1 - Melbourne, Australia
T2 - International Conference on Accelerator and Large Experimental Physics Control Systems
T3 - 15
LA - english
AB - Stable and reproducible generation of a photon beam at Free Electron Lasers (FELs) necessitates a low energy spread of the electron beam. A low level radio frequency (LLRF) control system stabilizes the RF field inside accelerating modules. An electron beam passing through the cavity induces a drop in the actual stored field proportional to the charge, the cavity shunt impedance, and the bunch repetition rate. The feedback loop compensates for the perturbation after the accelerating gradient drops. Due to the digital loop delay and limited bandwidth of the closed loop system, this disturbance induces control errors which can increase beam energy spread. An open-loop controller uses information obtained from the beam diagnostic systems accounting in real-time for fluctuations of the beam current. This paper describes the bunch charge detection scheme, its implementation, as well as results of the tests performed on the ELBE (Electron Linac for beams with high Brilliance and low Emittance) radiation source at the HZDR (Helmholtz-Zentrum Dresden-Rossendorf) facility.
PB - JACoW
CP - Geneva, Switzerland
SP - 295
EP - 297
KW - LLRF
KW - real-time
KW - cavity
KW - detector
KW - feedback
DA - 2015/12
PY - 2015
SN - 978-3-95450-148-9
DO - 10.18429/JACoW-ICALEPCS2015-MOPGF093
UR - http://jacow.org/icalepcs2015/papers/mopgf093.pdf
ER -