The period of the 2元R 2n m motion 7、 v gB The cyclotron frequency 1 qB T (回旋频率) 2n m The cyclotron period and frequency are independent of speed qB m v R T 2 2   The period of the motion m qB T   2 1   The cyclotron frequency The cyclotron period and frequency are independent of speed. （回旋频率）