<?xml version="1.0" encoding="UTF-8"?> <references> <reference> <a1>Bruchon, Niky</a1> <a2>Karpov, Ivan</a2> <a2>Madysa, Nico</a2> <a2>Papotti, Giulia</a2> <a2>Quartullo, Danilo</a2> <t1>Operational Tool for Automatic Setup of Controlled Longitudinal Emittance Blow-Up in the CERN SPS</t1> <t2>JACoW ICALEPCS</t2> <sn/> <op>TUPDP086</op> <vo>2023</vo> <ab>The controlled longitudinal emittance blow-up is necessary to ensure the stability of high-intensity LHC-type beams in the CERN SPS. It consists of diffusing the particles in the bunch core by injecting a bandwidth-limited noise into the beam phase loop of the main 200 MHz RF system. Obtaining the correct amplitude and bandwidth of this noise signal is non-trivial, and it may be tedious and time-demanding if done manually. An automatic approach was developed to speed up the determination of optimal settings. The problem complexity is reduced by splitting the blow-up into multiple sub-intervals for which the noise parameters are optimized by observing the longitudinal profiles at the end of each sub-interval. The derived bunch lengths are used to determine the objective function which measures the error with respect to the requirements. The sub-intervals are tackled sequentially. The optimization moves to the next one only when the previous sub-interval is completed. The proposed tool is integrated into the CERN generic optimization framework that features pre-implemented optimization algorithms. Both single- and multi-bunch high-intensity beams are quickly and efficiently stabilized by the optimizer, used so far in high-intensity studies. A possible extension to Bayesian optimization is being investigated.</ab> <la>eng</la> <k1>controls; emittance; operation; target; software; </k1> <pb/> <pp/> <yr>2023</yr> <ed/> <ul>http://cds.cern.ch/record/2896172/files/document.pdf; </ul> <no>Imported from Invenio.</no> </reference> </references>