Minimization of three-dimensional beam emittance growth in rare-isotope accelerator

作者：Oh B H; Yoon M^*

来源：Journal of the Korean Physical Society, 2016, 69(11): 1656-1665.

DOI：10.3938/jkps.69.1656

• Heavy ion accelerator
• Genetic algorithm
• Emittance growth
• Simplex

In this paper, we describe a research to minimize the three-dimensional (3D) emittance growth (EG) in the RAON accelerator, a heavy ion accelerator currently being developed in Korea to produce various rare isotopes. The emittance minimization is performed using the multi-objective genetic algorithm and the simplex method. We use them to analyze the driver linac for the in-flight fragmentation separator of the RAON facility and show that redesign of the 90-degree bending section of the RAON accelerator together with adjustment of optics in the upstream and downstream superconducting linacs can limit the 3D EG to similar to 20 % in the entire region of the driver linac. Effects of various magnet and rf accelerating cavity errors on the beam-EG are also discussed.

• 出版日期2016-12