CIAE, Beijing, People’s Republic of China
Fixed Field Alternating Gradient Accelerators have been developed for decades. A continuous wave (CW) 2 GeV FFA which aims at high-power proton beam applications is under developing in China Institute of Atomic Energy (CIAE). To avoid dangerous resonance lines and manipulate the tune diagram flexibly, 3rd order magnetic field is applied along the radius and 10-fold symmetrical F-D-F scheme has been proved to be feasible. In this paper, Integral Equation Method (IEM) is introduced and shown more efficient than adjusting the variable gap manually, saving time for magnet design. First of all, the radial mean field is set as a main design goal and the Δ H at different radii is solved by linear equations based on IEM. The isochronism is done when the mean field is well matched with the design value, whereas some precise corrections are needed for the oscillating frequency Vr and Vz, such as fringe field effects and multipole components near the end of pole face. The tune shift caused by fringe field is also included in this paper. Fringe field is more crucial for HTS magnets especially, since the leaked field of superconducting coil is ~1 kGs. Considering that, we apply an angular matching method to compensate the tune shift by fringe field.
HUST, Wuhan, People’s Republic of China
Shenzhen Institute of Computing Science, Shenzhen, People’s Republic of China
Canted-Cosine-Thera (CCT) superconducting magnet is a promising alternative for normal-conducting magnets in compact accelerator systems such as large hadron colliders or particle therapy facilities. For the convenience of lattice design with CCT, we develop the CCT Simulation and Particle Tracking (CSPT) toolkit. It’s a program that can perform both simulations of the beam dynamic process within particle accelerators and basic electromagnetic harmonic analysis. The charged-particle tracking and electromagnetic calculation process can be accelerated by either CPU multicore or GPU parallel, with a maximum speed-up ratio of 457. The simulation result of the program is well consistent with Opera and COSY Infinity.
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
