【摘 要】
:
A 325 MHz aluminum prototype of a spatially periodic RF quadrupole focusing linac was developed at the Institute of Modern Physics, Chinese Academy of Sciences,
【机 构】
:
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;School of Nuclear Sc
论文部分内容阅读
A 325 MHz aluminum prototype of a spatially periodic RF quadrupole focusing linac was developed at the Institute of Modern Physics, Chinese Academy of Sciences, as a promising candidate for the front end of a high-current linac. It consists of an alternating series of crossbar H-type drift tubes and RF quadrupole sections. Owing to its special geometry, cavity fabrication is a major hurdle for its engineering development and application. In this paper, we report the detailed mechanical design of this structure and describe its fabrication process, including machining, assembly, and inspection. The field distribution was measured by the bead-pull technique. The results show that the field errors of both the accelerating and focusing fields are within an acceptable range. A tuning scheme for this new structure is proposed and verified. The cold test process and results are presented in detail. The develop-ment of this prototype provides valuable guidance for the application of the spatially periodic RF quadrupole structure.
其他文献
“对慈善,潘亚文是慷慨的;对工作,潘亚文是严格的;对员工,潘亚文是友善的;对亲戚,潘亚文则是冷酷的”。 “坏”亲戚 随着潘亚文的不断成功,许多家乡的亲戚希望得到他的帮助,但潘亚文很少直接给亲属钱,他不愿意亲属们养成“背靠大树好乘凉”的心态。不过,他很愿意帮他们创造些商机,让他们通过自己的努力获得财富。 好老板 “董事长对员工很好,我们的福利待遇非常好。”潘亚文的员工胡国锋自
针对生猪养殖废水处理过程中普遍存在的脱氮效果不佳,工艺流程较长等问题,采用中试规模序批式膜生物反应器(SMBR)处理生猪养殖废水,并与猪场现有废水处理A2/O工艺进行了比较.
目的 探析异位妊娠大出血患者输血治疗中应用常规凝血检验项目的疗效检测意义.方法 选取本院收治的88例异位妊娠大出血患者病历资料进行回顾性分析,根据患者输血治疗期间是否
为探明碱度对混凝去除藻细胞及其分泌有机物的影响,保证饮用水水质.以铜绿微囊藻为研究对象,选用氯化铝(A1C13·6H2O)作为混凝剂进行混凝实验,考察了不同碱度的含藻水样在pH
早在1996年,作者在论述水泥工业可持续发展战略时就提出了"四零一负"的理念,其中关于水泥工业要实现对周围环境"零污染"方面就涉及了削减NOx的排放问题.只有在圆满地完成了第
针对K2FeO4和MIEX两种备受关注的净水技术,系统研究了二者在净水性能方面的差异以及可能存在的协同效应,分别考察了K2FeO4、MIEX,以及K2FeO4-MIEX联合处理对DOC和UV254的去除
Sinter is the main raw material in the blast fur-nace iron-making process, and basicity (CaO/SiO2) is an important quality index of sinter. Prompt gamma neutron
本文首先对食管胃交界部腺癌的概念进行阐释,然后从解剖学角度对生理结构的特点进行分析,针对不同病例采取个体化疗法,旨在为食管胃交界部腺癌的诊治提供理论依据。
在实际水体中存在的颗粒物、有机物、无机阴离子等对吸附剂的稳定性和污染物的去除率均有重要的影响.所制备的尿素官能团化Fe3O4@LDH(urea-Fe3O4@LDH)对磷酸三苯酯(TPhP)的去
古代文人墨客在形容女性美的时候,大多少不了“峨眉”、“芙蓉面”、“肤如凝脂”、“腰如素束”之词,可见腰在女性美中亦占有一席之地。中国如此,国外亦不例外。美国一位体