摘要：三排圆柱滚子轴承具有尺寸大,套圈变形大,滚子多,转速低等特点,需要综合考虑套圈变形以及复杂接触进行轴承接触力学特性分析与修形设计来提高轴承疲劳寿命。针对三排圆柱滚子轴承接触对数量多,计算量大等问题,考虑大型套圈变形提出了基于刚度等效与实体混合的三排圆柱滚子轴承力学模型,其中内、外圈采用有限元,与滚子接触采用非线性弹簧模型与实体有限元模型混合方式,并通过实例将等效模型与整体有限元模型、接触有限元子模型进行对比分析,结果表明:等效模型与整体有限元模型滚子法向接触载荷计算误差在7%以内,且计算效率大幅提升。基于等效模型开展滚子修形设计研究,主推滚子的最优修形方式为对数修形,最优对数修形量范围为0.09~0.13 mm,并且第1列主推滚子的修形量应大于第2列主推滚子。

摘要：A new linear accelerating structure SFRFQ was proposed to transfer the RFQ inter-vane voltage to the inter-longitudinal accelerating gap voltage so as to improve the acceleration efficiency.A SFRFQ prototype is being constructed to explore its feasibilities,which will be installed behind the 1MeV ISR RFQ and accelerates the O^+ beam from 1MeV to 1.6MeV.A high power SFRFQ model cavity was designed and tested,which has proved that an accelerating voltaire higher than 70kV could be applied.A magnetic triplet matching section was designed to realize the beam matching between 1MeV ISR RFQ and *** upgrading of 1MeV ISR RFQ has been carried out smoothly, and its output beam current has reached 2mA.

摘要：为研究强流质子RFQ加速腔的设计与加工工艺 ,研制了一台全尺寸无氧铜工艺腔 .本文介绍了其物理设计与机械设计、机械加工与钎焊工艺研究及其高频性能的测量和调节 .经调节 ,RFQ工艺腔可以达到较为理想的电场分布 ,其 4个象限电场分布的一致性和平整度均能满足要求 。

摘要：介绍了一台基于多缝单丝法的强流离子束发射度仪,讨论了缝丝法的测量原理及该发射度仪的系统构成和设计要点,给出了利用该发射度仪对中国原子能科学研究院ECR离子源发射度的测量结果。对于强流离子束,只能采用短缝对束流进行不完全采样以实现充分的冷却。由此引起的系统误差,可以通过模拟计算估计其修正值。