【摘要】 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190Ir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190Ir这样的重离子达到σ(m)/m≈10-8的测量精度。更多还原

【Abstract】 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.更多还原