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000357444 041__ $$aEnglish
000357444 1001_ $$0P:(DE-Ds200)OR0900$$aOndreka, David$$b0$$eCorresponding author
000357444 1112_ $$a15th International Particle Accelerator Conference$$cNashville$$d2024-05-19 - 2024-05-24$$gIPAC2024$$wUSA
000357444 245__ $$aSlow extraction of a dual-isotope beam from SIS18
000357444 260__ $$bJACoW Publishing$$c2024
000357444 300__ $$a1698-1701 pages
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000357444 520__ $$aRecently, the heavy ion synchrotron SIS18 at GSI was for the first time operated with a dual-isotope beam, made up of 12C3+ and 4He+. Such a beam can be used to improve carbon radiotherapy by providing online information on dose deposition, where the helium ions serve as a probe beam traversing the patient while depositing a negligible dose. For this, the accelerator has to deliver a slowly extracted beam with a fixed fraction of helium over the spill. The difference in mass-to-charge ratio of 4He compared to 12C is small enough to permit simultaneous acceleration and to make the two isotopes practically indistinguishable for the accelerator instrumentation. Yet, it may cause a temporal shift between the two components in the spill owing to the sensitivity of slow extraction to tiny tune variations. We investigated different extraction methods, and examined the time-wise stability of the dual-isotope beam with a beam monitoring setup installed in the GSI biophysics experiment room. A constant helium fraction was obtained using transverse knock-out extraction with adjusted chromaticity.
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000357444 650_7 $$2Other$$aAccelerator Physics
000357444 650_7 $$2Other$$amc4-hadron-accelerators - MC4: Hadron Accelerators
000357444 650_7 $$2Other$$aMC4.A16 - MC4.A16 Advanced Concepts
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000357444 7001_ $$0P:(DE-Ds200)OR2146$$aBozyk, Lars$$b1
000357444 7001_ $$0P:(DE-Ds200)OR5177$$aGraeff, Christian$$b2
000357444 7001_ $$0P:(DE-Ds200)OR1222$$aSpiller, Peter$$b3$$ugsi
000357444 7001_ $$0P:(DE-Ds200)OR1229$$aStadlmann, Jens$$b4
000357444 7001_ $$0P:(DE-Ds200)OR6911$$aVolz, Lennart$$b5
000357444 7001_ $$aPilat, Fulvia$$b6$$eEditor
000357444 7001_ $$aFischer, Wolfram$$b7$$eEditor
000357444 7001_ $$aSaethre, Robert$$b8$$eEditor
000357444 7001_ $$aAnisimov, Petr$$b9$$eEditor
000357444 7001_ $$aAndrian, Ivan$$b10$$eEditor
000357444 773__ $$a10.18429/JACOW-IPAC2024-TUPS29
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