排序方式: 共有18条查询结果,搜索用时 296 毫秒
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莫晓虎 张建勇 张清江 Achasov Mikhail 蔡啸 傅成栋 Harris Fred 刘倩 Muchnoi Nikolay 秦庆 屈化民 王贻芳 徐金强 张天保 《中国物理 C》2011,35(7):642-655
Understanding the radiation background at the north crossing point (NCP) in the tunnel of BEPCII is crucial for the performance safety of the High Purity Germanium (HPGe) detector, and in turn of great significance for long-term stable running of the energy measurement system. Therefore, as the first step, a NaI(Tl) detector is constructed to continuously measure the radiation level of photons as background for future experiments. Furthermore, gamma and neutron dosimeters are utilized to explore the radiation distribution in the vicinity of the NCP where the HPGe detector will be located. Synthesizing all obtained information, the shielding for neutron irradiation is studied based on model-dependent theoretical analysis. 相似文献
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The primary stripper foil's lifetime is very important for high intensity proton accelerators. Besides high temperature, the wrinkle of the stripper foil is also harmful for the lifetime and the injection efficiency. However, the recent wrinkle simulation is still not perfect. In this paper, a new method for wrinkle analysis has been proposed for the first time, which is integrated with the buckling theory. Based on this method, the wrinkle vibration and the maximum wrinkle shape of the normally mounted foil have been simulated. Then, two mounting schemes for reducing the wrinkle have been contrasted. Finally, the foil mounting structure for CSNS has been designed. 相似文献
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环-靶站输运线(RTBT)末端的准直器是中国散裂中子源(CSNS)工程中的关键部件之一,因其靠近靶站,辐射剂量大,维护困难,故设计可靠性极为重要。根据准直器的工作原理,及CSNS物理设计要求,对比国外同类加速器的设计经验,设计完成准直器设备。在设计过程中兼顾了热沉积、功率损耗和材料性能等方面的严格要求,并逐一阐述了具体方案。利用Bethe-Bloch公式计算与SRIM软件模拟的结果比较,确定了模拟工具和模拟方法的可靠性,根据ANSYS有限元软件模拟的结果,验证了准直器结构设计的可靠性。 相似文献
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莫晓虎 E. V. Abakumova M. N. Achasov V. E. Blinov 初元萍 董海义 傅成栋 F. A. Harris V. V. Kaminskiy A. A. Krasnov 李小南 刘倩 N. Yu. Muchnoi I. B. Nikolaev E. E. Pyata 屈化民 秦庆 A.G. Shamov 沈成平 G. S. Varner 王贻芳 徐金强 张建勇 张清江 张银鸿 张天保 V. N. Zhilich 赵卓 A. A. Zhukov 《中国物理 C》2010,34(6):912-917
The beam energy measurement system at BEPCII is composed of there parts: laser source and optics system, laser-electron interaction system and High Purity Germanium (HPGe) detector system. The special components and construction of each part are introduced, especially about radiation background measurement in the storage ring, which is of great importance for the safe commissioning of HPGe detector. 相似文献
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基座作为磁铁支架的基础,其制作工艺以及与地面连接固定方式的不同将影响磁铁与支架的稳定性。基于先进光源对磁铁支撑系统稳定性的极高要求,开展了基座安装浇筑实验,选取工程上常用的几种混凝土施工工艺,制作统一外形尺寸的实验件,通过锤击法逐一测试其固有频率,评估其稳定性,得到二次灌浆可有效提高稳定性、环氧基灌浆料获得的稳定性优于水泥基灌浆料等结论。基于固有频率测试结果,以HEPS支撑系统为例分析了不同的基座安装方式对系统模态的影响。 相似文献
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The rapid cycling synchrotron (RCS) of the China Spallation Neutron Source (CSNS) is a high intensity proton ring with beam power of 100 kW. In order to control the residual activation to meet the requirements of hands-on maintenance, a two-stage collimation system has been designed for the RCS. The collimation system consists of one primary collimator made of thin metal to scatter the beam and four secondary collimators as absorbers. Thermal analysis is an important aspect in evaluating the reliability of the collimation system. The calculation of the temperature distribution and thermal stress of the primary collimator with different materials is carried out by using ANSYS code. In order to control the temperature rise and thermal stress of the primary collimator to a reasonable level, an air cooling structure is intended to be used. The mechanical design of the cooling structure is presented, and the cooling efficiency with different chin numbers and wind velocity is also analyzed. Finally, the fatigue lifetime of the collimator under thermal shocks is estimated. 相似文献
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