研究了CSRe电子冷却模式下使用线性质量刻度时,空间电荷效应对测量精度的影响、CSRe上测量~(190)Ir质量的实验可行性以及估算了电子冷却模式下,使用非线性刻度法所能达到的测量精度.理论上的分析表明,CSRe在束流和二极铁磁场稳定的理想情况下,如果电子冷却对同种离子束的冷却效果能达到δp/p＝10~(-6)量级,采用非线性刻度的方法,能够对像~(190)Ir这样的重离子达到σ(m)/m≈10~(-8)的测量精度.
Nuclear mass measurement by electron cooling mode in CSRe is discussed, mainly in three related aspects: the systematic error caused by the space charge effect in the case of linear mass calibration; the possibility of mass measurement of ~(190)Ir in CSRe; the estimation of the attainable precision in the case of non-linear mass calibration. Theoretic analysis of the attainable precision shows that a precision of σ(m)/m≈10~(-8) can be achieved if the momentum spread of each kind of ions can be reduced to 10~(-6) in CSRe.
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