CERN Accelerating science

Article
Title	Implementation of a Tune Sweep Slow Extraction with Constant Optics at MedAustron
Author(s)	Arrutia Sota, Pablo Andreas (CERN) ; Burrows, Philip (JAI, UK) ; De Franco, Andrea (QST, Rokkasho Fusion Inst.) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Kuehteubl, Florian (EBG MedAustron) ; Pivi, Mauro (MedAustron) ; Prokopovich, Dale (MedAustron) ; Velotti, Francesco (CERN)
Publication	2022
Number of pages	3
In:	JACoW IPAC 2022 (2022) 1715-1717
In:	13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1715-1717
DOI	10.18429/JACoW-IPAC2022-WEPOST015
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN SPS
Abstract	Conventional slow extraction driven by a tune sweep perturbs the optics and changes the presentation of the beam separatrix to the extraction septum during the spill. The constant optics slow extraction (COSE) technique, recently developed and deployed operationally at the CERN Super Proton Synchrotron to reduce beam loss on the extraction septum, was implemented at MedAustron to facilitate extraction with a tune sweep of operational beam quality. COSE fixes the optics of the extracted beam by scaling all machine settings with the beam rigidity following the extracted beam’s momentum. In this contribution the implementation of the COSE extraction technique is described before it is compared to the conventional tune sweep and operational betatron core driven cases using both simulations and recent measurements.
Copyright/License	CC-BY-3.0

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