Technique of producing high charge state heavy-ion beam

In order to get the Beijing HI-13 tandem accelerator beam with the higher range and LET in silicon, the techniques of beam route simulating and pico-ampere beam diagnosing were developed. The magnetic rigidity simulation and electric rigidity simulation techniques combined with beam spot observing and beam intensity measuring techniques were used for getting 360 MeV ¹⁹⁷Au ion beam with the peak-to-total ratio of 80% in the spectrum. The range of 360 MeV ¹⁹⁷Au in silicon is 30.1 μm and the LET is 86.1 MeV · cm² · mg^-1. This meets the requirement of single-event effect test, and the beam energy range and LET range in Beijing HI-13 tandem accelerator have been obviously enlarged. (authors)