Design optimization of the APF DTL in the SSC-linac

• Published in: Chinese physics C Vol. 34; no. 10; pp. 1639 - 1642
• Main Author: 王志军 何源 吴巍 杨雅清 肖陈
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.10.2010; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China%Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China%Graduate University of Chinese Academy of Sciences, Beijing 100049, China; School of Nuclear Science and Technology Lanzhou University, Lanzhou 73000, China
• Subjects: SSC; 优化设计; 兰州重离子加速器; 晶体管; 有源滤波器; 直线加速器; 重离子研究装置; MOGA; APF linac; pattern search method; phases optimization
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/34/10/017

A linear accelerator as a new injector for the SSC （Separated Sector Cyclotron） of the HIRFL （Heavy Ion Research Facility Lanzhou） is being designed. The DTL （Drift-Tube-Linac） has been designed to accelerate ^238U^34＋ from 0.140 MeV/u to 0.97 MeV/u. To the first accelerating tank which accelerates ^238U^34＋ to 0.54 MeV/u, the approach of Alternating-Phase-Focusing （APF） is applied. The phase array is obtained by coupling optimization software Dakota and beam optics code LINREV. With the hybrid of Multi- objective Genetic Algorithm （MOGA） and a pattern search method, an optimum array of asynchronous phases is determined. The final growth, both transversely and longitudinally, can meet the design requirements. In this paper, the deign optimization of the APF DTL is presented.