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RIS citation export for MOPGW091: Capture and Flat-Bottom Losses in the CERN SPS

AU  - Schwarz, M.
AU  - Lasheen, A.
AU  - Papotti, G.
AU  - Repond, J.
AU  - Shaposhnikova, E.N.
AU  - Timko, H.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Capture and Flat-Bottom Losses in the CERN SPS
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - Particle losses on the flat bottom of the SPS, the last accelerator in the injector chain of the LHC at CERN, are a strong limitation for reaching the high intensities required by the high luminosity upgrade of the LHC. Two contributions to these losses are investigated in this paper. The first losses occur during the PS-to-SPS bunch-to-bucket transfer, since the bunch rotation in the PS creates halo particles and the bunch does not completely fit into the SPS RF-bucket. The effect of longitudinal shaving in the PS on the beam transmission was recently tested. At high intensities, further capture losses are caused by beam loading in the traveling wave RF system of the SPS, which is partially compensated by the LLRF system, in particular by one-turn delay feedback. While the feedforward system reduces the capture losses, it also increases the losses along the flat bottom due to the RF noise.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 327
EP  - 330
KW  - beam-loading
KW  - injection
KW  - emittance
KW  - impedance
KW  - feedback
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPGW091
UR  - http://jacow.org/ipac2019/papers/mopgw091.pdf
ER  -