New layout of time resolved beam energy spectrum measurement for Dragon-Ⅰ

A new layout of time resolved beam energy spectrum measurement is proposed for Dragon-Ⅰ by a new method named RBS(rotating beams in solenoids). The basic theory of RBS and the new layout are presented and the measuring error is also discussed. The derived time resolved beam energy spectrum is discrete and is determined by measuring the beam’s rotating angle and expanding width through a group of solenoids at the export of Dragon-Ⅰ.