Compensation of longitudinal entrance and exit gap field effects in RFQ’s of the 4-ROD type
- In case of 4-Rod-type RFQ’s the quadrupole electrodes are excited by a series of coupled RF oscillators. As the contact planes between both electrode pairs differ, there remains an oscillating electric potential along the beam axis. This results in remarkably high longitudinal field components between the electrode ends and the RFQ tank end walls. In contrast, the electrodes of a 4-Vane RFQ are equally charged to ±|V0∕2| and only feature a quadrupole on-axis field. The entrance gap fields were investigated to serve as a longitudinal prebuncher instead of causing additional longitudinal emittance growth. The effects of the entrance gap field have been validated in beam dynamics simulations. The exit fields have to be taken into consideration for a calculation of the exact RFQ output energy.
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| Author: | Maximilian Schütt, Marc SyhaGND, Ulrich RatzingerORCiD |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-775394 |
| DOI: | https://doi.org/10.1016/j.nima.2019.02.071 |
| ISSN: | 0168-9002 |
| Parent Title (English): | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2019/03/07 |
| Date of first Publication: | 2019/03/07 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2023/11/03 |
| Tag: | 4-ROD RFQ; Fringe field; Gap field; Ladder-RFQ; RFQ |
| Volume: | 928 |
| Page Number: | 7 |
| First Page: | 58 |
| Last Page: | 64 |
| HeBIS-PPN: | 516753223 |
| Institutes: | Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International |
