TY  - CONF
AU  - Prebibaj, Tirsi
AU  - Antoniou, Fanouria
AU  - Asvesta, Foteini
AU  - Bartosik, Hannes
AU  - Franchetti, Giuliano
TI  - Experimental Investigations on the High-Intensity Effects Near the Half-Integer Resonance in the PSB
CY  - Geneva, Switzerland
PB  - JACoW Publishing
M1  - GSI-2025-00511
SP  - 499 - 502
PY  - 2024
N1  - 	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license.
AB  - Space charge effects are the main limitation for the brightness performance of the Proton Synchrotron Booster (PSB) at CERN. Following the upgrades of the LHC Injectors Upgrade (LIU) project, the PSB delivered unprecedented brightness even exceeding the projected target parameters. A possibility for further increasing the brightness is to operate above the half-integer resonance 2Q_y=9 in order to avoid emittance blow-up from resonances at Q_x,y=4 due to the strong space charge detuning. The half-integer resonance can be compensated to a great extent using the available quadrupole correctors in the PSB, and also deliberately excited in a controlled way. The control of the half-integer resonance and the flexibility of the PSB to create a variety of different beam and machine conditions allowed the experimental characterization of space charge effects near this resonance. This contribution reports the experimental observations of the particle trapping during the dynamic crossing of the half-integer, as well as systematic studies of the beam degradation from space charge induced resonance crossing.
T2  - 68th Adv. Beam Dyn. Workshop High-Intensity High-Brightness Hadron Beams
CY  - 9 Oct 2023 - 13 Oct 2023, Geneva (Switzerland)
Y2  - 9 Oct 2023 - 13 Oct 2023
M2  - Geneva, Switzerland
KW  - Accelerator Physics (Other)
KW  - Beam Dynamics in Rings (Other)
LB  - PUB:(DE-HGF)8
DO  - DOI:10.18429/JACOW-HB2023-THBP19
UR  - https://repository.gsi.de/record/358327
ER  -