【摘要】 高能同步辐射光源验证装置(HEPS-TF)插入件系统目前正研制一台低温波荡器(CPMU)样机。为了保证辐射强度,必须严格控制磁场误差。低温波荡器由于其结构的特殊性,承载磁铁的真空内大梁工作在真空、低温环境。低温收缩引起的变形量会引起相位误差,从而降低同步辐射光的相干性。因此,控制和优化真空内大梁的变形是低温波荡器机械设计的重点。采用数值模拟计算的方法,对真空内大梁的变形量进行了分析和优化,最终通过结构优化和补偿机构的设计有效降低了其变形量,使之满足设计指标。更多还原

【Abstract】 A Cryogenic Permanent Magnet Undulator( CPMU) for the insertion device system of high energy photon source test facility( HEPS-TF) was under the development. An in-vacuum girder is a key part which supports magnet and works at cryogenic and vacuum conditions. Deformation of an in-vacuum girder caused by cryogenic contractility will lead to magnetic error directly. Magnetic field errors like phase error must be guaranteed to acquire high coherence synchrotron radiation photon. In this article,an in-vacuum girder deformation were calculated and discussed,its optimization and compensation were made to reduce and eliminate the deformations so as to obtain a high quality magnetic field.更多还原