Title :
Simulation of an RFQ funnel for heavy-ion beams
Author :
Guy, F.W. ; Stokes, R.H.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
Abstract :
It is pointed out that the use of the magnetic force to focus and deflect heavy-ion beams is marginal at low ion velocities, and that low-emittance-growth funnels using discrete magnetic elements are difficult to design for these beams. It is shown that a new type of radio-frequency quadrupole (RFQ) funnel is especially suitable for this application. Simulation procedures, which include space-charge and image effects, have produced a high-quality funnel design for 20-MeV Bi+1 ions. In this arrangement, two separate RFQ accelerators produce slightly convergent beams that are combined by the RFQ funnel. The funnel provides deflection (and focusing) forces in separate RFQ channels that first make the two beams closely space and nearly parallel. Then the two beams enter a common channel where they are interlaced and made collinear
Keywords :
beam handling equipment; ion beams; particle beam diagnostics; 20 MeV; Bi ions; RFQ accelerators; RFQ funnel; beam deflection; beam focusing; discrete magnetic elements; heavy-ion beams; image effects; low-emittance-growth funnels; magnetic force; radio-frequency quadrupole; simulation procedures; slightly convergent beams; space-charge; Acceleration; Focusing; Fusion power generation; Ion beams; Ion sources; Laboratories; Linear particle accelerator; Magnetic forces; Particle beams; Radio frequency;
Conference_Titel :
Particle Accelerator Conference, 1989. Accelerator Science and Technology., Proceedings of the 1989 IEEE
Conference_Location :
Chicago, IL
DOI :
10.1109/PAC.1989.73265