中文摘要：

分析了在储存环中回旋的离子束与残余气体分子、内靶和冷却电子束相互作用时的损失机制及相应的束流寿命，针对兰州重离子加速器冷却储存环实验环内靶模式，计算了50-500MeV／u ^12C^6＋，^36Ar^18＋，^132Xe^54＋和^238U^92＋等束流在各种损失机制影响下所对应的束流寿命和总的束流寿命。结果表明：影响束流寿命的主要因素是与内靶分子（原子）之间的电荷交换及与冷却电子束之间的辐射复合；对于重离子束^132Xe^54＋和^238U^92＋，与冷却电子束之间的辐射复合是影响其储存寿命的主要因素。

英文摘要：

The loss mechanism and lifetime of ion beams in collisions with residual gas, internal target and electrons in e-cooler in heavy ion cooler storage rings were studied. The partial beam lifetimes resulting from various loss mechanisms and the total beam lifetimes of 50-500 MeV/u ^12C^6＋,^36Ar^18＋,^132Xe^54＋ and ^238U^92＋ stored in the experimental ring of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou （HIRFL-CSR） were calculated. The calculations indicate that the charge exchange process between ion beams and the internal target, as well as the radiative recombination process with the electrons in e-cooler restrict the beam lifetime considerably. For heavy ion beams such as ^132Xe54^＋ and ^238U^92＋, the radiative recombination is the dominant loss mechanism.