Abstract
Author(s): Hwang, K; Qiang, J | Abstract: A recirculating superconducting linear accelerator with the advantage of both straight and circular accelerator has been demonstrated with relativistic electron beams. The acceleration concept of a recirculating proton beam was recently proposed [J. Qiang, Nucl. Instrum. Methods Phys. Res., Sect. A 795, 77 (2015NIMAER0168-900210.1016/j.nima.2015.05.056)] and is currently under study. In order to further support the concept, the beam dynamics study on a recirculating proton linear accelerator has to be carried out. In this paper, we study the feasibility of a two-pass recirculating proton linear accelerator through the direct numerical beam dynamics design optimization and the start-to-end simulation. This study shows that the two-pass simultaneous focusing without particle losses is attainable including fully 3D space-charge effects through the entire accelerator system.
Highlights
A high power proton accelerator as a driver for production neutrinos and neutrons has important applications in basic science and the energy industry and is being actively studied around the world [1,2]
The existing recirculating superconducting linear accelerators (LINAC) for electron beams provided the proof of concept for the cost efficiency and for the beam quality conservation [3,4]
A multi-GeV recirculating proton LINAC was proposed in Ref. [8]
Summary
A high power proton accelerator as a driver for production neutrinos and neutrons has important applications in basic science and the energy industry and is being actively studied around the world [1,2]. Beam while it varies comparatively faster for the proton beam through high gradient superconducting rf cavities This fact requires stronger restriction on rf phase synchronization for a medium energy proton beam. The nonperiodic structure makes the design of the focusing channel more challenging Another difference between the electron beam and the proton beam is the stronger space-charge force for a proton beam due to the lower relativistic factor γ. The purpose of this paper is to assess the feasibility of the nonperiodic focusing LINAC channel of two energy beams and the potential impact of the space-charge effects on the proton beam distribution using self-consistent multiparticle simulation.
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