LINAC5 - A Quasi-Alvarez Linac for BioLEIR

8th International Particle Accelerator Conference

Garland, J.M.^1 ; Lallement, J.-B.^1 ; Lombardi, A.^1

BE-ABP-HSL, CERN, Geneva 23

CH-1211, Switzerland^1

关键词: Accelerating structure;    Beam dynamics simulations;    Design studies;    Drift-tube linac;    Ion accelerations;    Lattice design;    Radio frequencies;    Radio frequency quadrupoles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/874/1/012057/pdf
DOI  :  10.1088/1742-6596/874/1/012057

来源: IOP

【 摘 要 】

LINAC5 is a new linac proposed for the acceleration of light ions with Q/A = 1/3 to 1/4 for medical applications within the BioLEIR (Low Energy Ion Ring) design study at CERN. We propose a novel quasi-Alvarez drift-tube linac (DTL) accelerating structure design for LINAC5, which can reduce the length of a more conventional DTL structure, yet allows better beam focussing control and flexibility than the inter-digital H (IH) structures typically used for modern ion acceleration. We present the main sections of the linac with total length ∼12 m, including a 202 MHz radio frequency quadrupole (RFQ) a matching medium energy beam transport (MEBT) and a 405 MHz quasi-Alvarez accelerating section with an output energy of 4.2 MeV/u. Permanent magnet quadrupoles are proposed for use in the quasi-Alvarez structure to improve the compactness of the design and increase the efficiency. Lattice design considerations, multi-particle beam dynamics simulations and RFQ and radio frequency (RF) cavity designs are presented.