357444 20250227110743.0 10.18429/JACOW-IPAC2024-TUPS29 doi 10.15120/GSI-2025-00401 datacite_doi GSI-2025-00401 English Ondreka, David P:(DE-Ds200)OR0900 0 Corresponding author 15th International Particle Accelerator Conference IPAC2024 Nashville 2024-05-19 - 2024-05-24 USA Slow extraction of a dual-isotope beam from SIS18 2024 JACoW Publishing 1698-1701 pages CONFERENCE_PAPER ORCID Conference Paper 33 EndNote INPROCEEDINGS BibTeX conferenceObject DRIVER Output Types/Conference Paper DataCite Contribution to a conference proceedings contrib contrib PUB:(DE-HGF)8 1738929254_2659993 PUB:(DE-HGF) Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Recently, the heavy ion synchrotron SIS18 at GSI was for the first time operated with a dual-isotope beam, made up of 12C3+ and 4He+. Such a beam can be used to improve carbon radiotherapy by providing online information on dose deposition, where the helium ions serve as a probe beam traversing the patient while depositing a negligible dose. For this, the accelerator has to deliver a slowly extracted beam with a fixed fraction of helium over the spill. The difference in mass-to-charge ratio of 4He compared to 12C is small enough to permit simultaneous acceleration and to make the two isotopes practically indistinguishable for the accelerator instrumentation. Yet, it may cause a temporal shift between the two components in the spill owing to the sensitivity of slow extraction to tiny tune variations. We investigated different extraction methods, and examined the time-wise stability of the dual-isotope beam with a beam monitoring setup installed in the GSI biophysics experiment room. A constant helium fraction was obtained using transverse knock-out extraction with adjusted chromaticity. 621 - Accelerator Research and Development (POF4-621) G:(DE-HGF)POF4-621 POF4-621 POF IV 0 6G14 - GSI-MU Ion Facilities (POF4-6G14) G:(DE-HGF)POF4-6G14 POF4-6G14 POF IV 1 Dataset connected to DataCite Accelerator Physics Other mc4-hadron-accelerators - MC4: Hadron Accelerators Other MC4.A16 - MC4.A16 Advanced Concepts Other Facility_outside_beam_time_program Experiment at GSI without experiment proposal number ( - ; Facility_outside_beam_time_program ) EXP:(DE-Ds200)Facility_outside_beam_time_program-20200803 EXP:(DE-Ds200)Experiment_without_proposal_number-20200803 EXP:(DE-Ds200)Experiment_without_proposal_number-20200803 0 Bozyk, Lars P:(DE-Ds200)OR2146 1 Graeff, Christian P:(DE-Ds200)OR5177 2 Spiller, Peter P:(DE-Ds200)OR1222 3 gsi Stadlmann, Jens P:(DE-Ds200)OR1229 4 Volz, Lennart P:(DE-Ds200)OR6911 5 Pilat, Fulvia 6 Editor Fischer, Wolfram 7 Editor Saethre, Robert 8 Editor Anisimov, Petr 9 Editor Andrian, Ivan 10 Editor 10.18429/JACOW-IPAC2024-TUPS29 OpenAccess http://repository.gsi.de/record/357444/files/TUPS29.pdf OpenAccess pdfa http://repository.gsi.de/record/357444/files/TUPS29.pdf?subformat=pdfa oai:repository.gsi.de:357444 openaire open_access VDB driver dnbdelivery GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 0 P:(DE-Ds200)OR0900 GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 1 P:(DE-Ds200)OR2146 GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 2 P:(DE-Ds200)OR5177 GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 3 P:(DE-Ds200)OR1222 GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 4 P:(DE-Ds200)OR1229 GSI Helmholtzzentrum für Schwerionenforschung GmbH I:(DE-Ds200)20121206GSI GSI 5 P:(DE-Ds200)OR6911 DE-HGF Forschungsbereich Materie Materie und Technologie G:(DE-HGF)POF4-620 G:(DE-HGF)POF4-621 G:(DE-HGF)POF4 G:(DE-HGF)POF4-600 G:(DE-HGF)POF Accelerator Research and Development 0 DE-HGF Forschungsbereich Materie Großgeräte: Materie G:(DE-HGF)POF4-6G0 G:(DE-HGF)POF4-6G14 G:(DE-HGF)POF4 G:(DE-HGF)POF4-600 G:(DE-HGF)POF GSI-MU Ion Facilities 1 2024 OpenAccess StatID:(DE-HGF)0510 StatID Creative Commons Attribution CC BY 4.0 LIC:(DE-HGF)CCBY4 HGFVOC I:(DE-Ds200)SYS-20121002OR231 SYS System Design SIS 100 / SIS 18 0 contrib VDB UNRESTRICTED I:(DE-Ds200)SYS-20121002OR231 FullTexts