| Title |
Electromagnetic Design of a Compact RF Chopper for Heavy-Ion Beam Separation at FRIB |
| Authors |
- A.C. Araujo Martinez, R.B. Agustsson, Y.C. Chen, S.V. Kutsaev
RadiaBeam, Santa Monica, California, USA
- A.S. Plastun, X. Rao
FRIB, East Lansing, Michigan, USA
|
| Abstract |
Rare isotope beams are produced at FRIB via fragmentation of a primary heavy ion beam in a thin target. The isotope beam of interest is contaminated with other fragments, which must be filtered out to ensure the delivery of rare isotopes with desired rates and purities. One of the stages of fragment separation uses an RF deflecting cavity to provide time-of-flight separation. However, to avoid neighboring bunches overlapping with each other and with the contaminants, it is necessary to increase the inter-bunch distance by a factor of four, corresponding to a 20.125 MHz rate. To solve this problem, we have developed an RF chopper system for the 500 keV/u primary heavy-ion beams. The system consists of a deflecting quarter wave resonator (QWR) cavity operating at 60.375 MHz, two dipole steering magnets, and a beam dump. In this paper, we present and discuss the optimization of the electromagnetic design of the QWR cavity and magnets, as well as some aspects, related to beam dynamics and conceptual engineering design.
|
| Funding |
This work was supported by the U.S. Department of Energy, Office of High Energy Physics, under SBIR grant DE- SC0020671. |
| Paper |
download WEPA48.PDF [3.028 MB / 4 pages] |
| Cite |
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※ EndNote |
| Conference |
NAPAC2022 |
| Series |
International Particle Accelerator Conference (5th) |
| Location |
Albuquerque, NM, USA |
| Date |
07-12 August 2022 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Sandra Biedron (Element Aero, Chicago, IL, USA); Evgenya Simakov (LANL, Los Alamos, NM, USA); Stephen Milton (Element Aero, Chicago, IL, USA); Petr M. Anisimov (LANL, Los Alamos, NM, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-232-5 |
| Online ISSN |
2673-7000 |
| Received |
02 August 2022 |
| Revised |
05 August 2022 |
| Accepted |
06 August 2022 |
| Issue Date |
08 September 2022 |
| DOI |
doi:10.18429/JACoW-NAPAC2022-WEPA48 |
| Pages |
738-741 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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