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| Title | Massless Beam Separation System for Intense Ion Beams | |||||
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| Abstract | The ExB chopper* in the Low Energy Beam Transport (LEBT) section of the accelerator-driven neutron source FRANZ** will form the required pulses with a repetition rate of 257 kHz out of the primary 120 keV, 50 mA DC proton beam. A following beam separation system will extract the deflected beam out of the beamline and minimize the thermal load by beam losses in the vacuum chamber. To further avoid an uncontrolled production of secondary particles, a novel massless septum system is designed for the beam separation. The septum system consists of a static C-magnet with optimized pole shapes, which will extract the beam with minimal losses, and a magnetic shielding tube, which will shield the transmitted pulsed beam from the fringing field of the dipole. The magnetic field and the beam transport properties of the system were numerically investigated. A main deflection field of about 250 mT was achieved, whereas the fringing field was reduced to below 0.3 mT on the beam axis at 60 mm distance from the dipole. With this settings, the beam was numerically transported through the system with minimal emittance growth. Manufacturing of the septum system has started. | |||||
| Footnotes & References | * Wiesner, C., et al. "Chopping High-Intensity Ion Beams at FRANZ", WEIOB01, LINAC 2014. ** Meusel, O., et al. "FRANZ–Accelerator Test Bench And Neutron Source", MO3A03, LINAC 2012. |
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| Paper | download THPF023.PDF [1.495 MB / 3 pages] | |||||
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |||||
| Conference | IPAC2015, Richmond, VA, USA | |||||
| Series | International Particle Accelerator Conference (6th) | |||||
| Proceedings | Link to full IPAC2015 Proccedings | |||||
| Session | Thursday Posters | |||||
| Date | 07-May-15 16:00–18:00 | |||||
| Main Classification | 4: Hadron Accelerators | |||||
| Sub Classification | T12 - Beam Injection/Extraction and Transport | |||||
| Keywords | septum, shielding, dipole, beam-transport, vacuum | |||||
| Publisher | JACoW, Geneva, Switzerland | |||||
| Editors | Stuart Henderson (ANL, Argonne, IL, USA); Evelyn Akers (Jlab, Newport News, VA, USA); Todd Satogata (JLab, Newport News, VA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany) | |||||
| ISBN | 978-3-95450-168-7 | |||||
| Published | June 2015 | |||||
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