Magnetic Elements of a Low-Energy Channel for a Heavy Ion Accelerator

A pulsed linear heavy ion accelerator with an energy of 4 MeV/nucleon and a current of up to 10 mA is being developed at the Kurchatov Institute, Kurchatov Complex of Theoretical and Experimental Physics. In the low-energy ion beam transportation channel (LEBT), immediately after the laser source, refining of the target ion fraction with a ratio A/Z = 4–8 from the initially formed beam with a wide charge spectrum and matching of the transverse characteristics of the beam during injection into the RFQ accelerating section is provided. The paper presents the results of modeling improved designs of a pulsed solenoid and two constant-current deflecting electromagnets with a rotation angle of 60°. The optimization of the structures was carried out taking into account the results of dynamic calculations performed by modeling the movement of ions in the 3D distribution of the magnetic field throughout the LEBT channel from its entrance to the exit, and correction of power supply modes.