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@ARTICLE{Niedermayer:350567,
author = {Niedermayer, Philipp and Singh, Rahul},
title = {{E}xcitation signal optimization for minimizing
fluctuations in knock out slow extraction},
journal = {Scientific reports},
volume = {14},
number = {1},
issn = {2045-2322},
address = {[London]},
publisher = {Macmillan Publishers Limited, part of Springer Nature},
reportid = {GSI-2024-00572},
pages = {10310},
year = {2024},
note = {This article is licensed under a Creative Commons
Attribution 4.0 International License},
abstract = {The synchrotron is a circular particle accelerator used for
high energy physics experiments, material and life science,
as well as hadron cancer therapy. After acceleration to the
desired energies, particle beams are commonly extracted from
the synchrotron using the method of resonant slow
extraction. The goal is to deliver a steady particle
flux—referred to as spill—to experiments and treatment
facilities over the course of seconds while slowly emptying
the storage ring. Any uncontrolled intensity fluctuations in
the spill are detrimental to the efficiency of beam usage,
as they lead to detector pileups or detector interlocks,
hindering experiments and cancer treatment. Among the most
widely used extraction scheme in medical facilities is the
Radio Frequency Knock Out (RF-KO) driven resonant slow
extraction, where the stored beam is transversely excited
with a radio frequency (RF) field and the spill intensity is
controlled by the excitation signal strength. This article
presents particle dynamics simulations of the RF-KO system
with the focus on finding effective mechanism for minimizing
the intensity fluctuations while maintaining a good
extraction efficiency and other advantages of KO extraction.
An improved beam excitation signal which optimizes these
main objectives is found, and is rigorously compared
experimentally with other commonly applied techniques.},
cin = {HES / BEA},
ddc = {600},
cid = {I:(DE-Ds200)HES-20160901OR377 /
I:(DE-Ds200)BEA-20051214OR061},
pnm = {621 - Accelerator Research and Development (POF4-621) / DFG
project 491382106 - Open-Access-Publikationskosten /
2022-2024 / GSI Helmholtzzentrum für Schwerionenforschung
(491382106) / I.FAST - Innovation Fostering in Accelerator
Science and Technology (101004730)},
pid = {G:(DE-HGF)POF4-621 / G:(GEPRIS)491382106 /
G:(EU-Grant)101004730},
experiment = {$EXP:(DE-Ds200)External_experiment-20200803$},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:38705915},
UT = {WOS:001214241900004},
doi = {10.1038/s41598-024-60966-y},
url = {https://repository.gsi.de/record/350567},
}