The formulations for the calculation of focussing parameters of the three iron bar-magnetic focussing channel are derived in this paper. The calculation results are consistent with the measurement.
推导了三铁块磁聚焦孔道聚焦参数的计算公式，其计算结果与实测作了比较。
2
Many researchers bring forward the experiential computation formulations according to the experimental researches, but there are not consistent understandings about them.