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6-9 Python-based Phase Scan Application for ADS Linac
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作者 Hu Jianjun wang wangsheng wang Zhijun 《IMP & HIRFL Annual Report》 2015年第1期270-270,共1页
Phase scan application is very important software for ADS Linac beam tuning. The scan/measure tools in OpenXAL was used previously. In order to improve the scanning efficiency, a new phase scan application was develop... Phase scan application is very important software for ADS Linac beam tuning. The scan/measure tools in OpenXAL was used previously. In order to improve the scanning efficiency, a new phase scan application was developed. The Python was selected as the programming language to make the development easier. 展开更多
关键词 PHASE SCAN APPLICATION
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6-14 Beam Commissioning of Superconducting Demo Facility
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作者 wang Zhijun Jia Huan +7 位作者 He Yuan Dou Weiping wang wangsheng Feng Chi Liu Shuhui Chen Weilong Tao Yue Wu Jianqiang 《IMP & HIRFL Annual Report》 2014年第1期265-265,共1页
The demo facility of China ADS injector II was installed in the tunnel in 2014. The on-site layout of demofacility is shown in the Fig. 1. The demo facility mainly inculdes ECRIS, LEBT, RFQ, MEBTTCM and Dplate.The TCM... The demo facility of China ADS injector II was installed in the tunnel in 2014. The on-site layout of demofacility is shown in the Fig. 1. The demo facility mainly inculdes ECRIS, LEBT, RFQ, MEBTTCM and Dplate.The TCM is composed by one Superconducting(SC) HWR cavity and two SC solenoids.The beam tuning began at September of 2014. The beam commissioning procedure mainly includes three steps.Calibration of single hardware. In this step, buncher cavity, SC HWR cavity and BPM offset are calibrated withbeam to make sure the parameter of the hardwares agree with the off-line measured value. The beam parametersare chosen to be 10 mA, 1 Hz and less than 200 s. From the results, the voltage of HWR cavity and bunchercavities agree well with the measurement with X-ray method. The offset between BPM electric center and quadruplemagnetic center is less than 0.6 mm, which is reasonable according to the mechanical alignment result. 展开更多
关键词 BEAM Commissioning SUPERCONDUCTING
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Transverse Emittance Reconstruction with Space Charge Effect
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作者 wang wangsheng Chen Weilong Feng Chi 《IMP & HIRFL Annual Report》 2019年第1期291-292,共2页
Emittance is a key figure of merit for charged particle beams,and various diagnostic techniques have been developed to try to measure it accurately.To measure the transverse emittance,a traditional emittance measureme... Emittance is a key figure of merit for charged particle beams,and various diagnostic techniques have been developed to try to measure it accurately.To measure the transverse emittance,a traditional emittance measurement device,which consists of slits and wire scanners,is installed at the MEBT section of the Ci-ADS injector Ⅱ. 展开更多
关键词 SCANNER SECTION EMITTANCE
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BPM测量束流纵向发射度与Twiss参数
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作者 秦元帅 王志军 +6 位作者 冯驰 刘淑会 窦为平 陈伟龙 王旺生 谢宏明 何源 《原子核物理评论》 CAS CSCD 北大核心 2021年第1期30-37,共8页
在C-ADS直线加速器样机中,为了描述束流相空间分布,需要精确测量束流在RFQ出口处的参数。束流横向信息已通过发射度重构测量获得,束流光学也得到了验证。采用了一种用BPM的SUM信号测量束流纵向参数的方法。在实验中,调节两台聚束器的聚... 在C-ADS直线加速器样机中,为了描述束流相空间分布,需要精确测量束流在RFQ出口处的参数。束流横向信息已通过发射度重构测量获得,束流光学也得到了验证。采用了一种用BPM的SUM信号测量束流纵向参数的方法。在实验中,调节两台聚束器的聚束腔压并记录其下游BPM上的SUM信号。通过粒子群算法和Trace Win模拟相结合的方法,得到了考虑空间电荷效应的测量结果。测得的发射度与Toutatis中的模拟值相近。 展开更多
关键词 纵向发射度测量 twiss参数 BPM 粒子群算法
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胎膜:退化组织还是功能组织? 被引量:3
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作者 汪旺生 孙刚 《中华围产医学杂志》 CAS CSCD 北大核心 2019年第10期698-703,共6页
胎膜由羊膜和绒毛膜组成,覆盖了约70%的子宫腔。以往认为,作为退化了的绒毛组织,胎膜可能在妊娠中只起着包裹羊水和胎儿的作用。但越来越多的证据表明,胎膜是妊娠期间最重要的功能组织之一。胎膜不仅保护着胎儿,还表达和分泌多种因子,... 胎膜由羊膜和绒毛膜组成,覆盖了约70%的子宫腔。以往认为,作为退化了的绒毛组织,胎膜可能在妊娠中只起着包裹羊水和胎儿的作用。但越来越多的证据表明,胎膜是妊娠期间最重要的功能组织之一。胎膜不仅保护着胎儿,还表达和分泌多种因子,参与妊娠维持和胚胎发育。胎膜来源的信号在分娩启动中起着非常关键的作用。如果过早发生胎膜激活,如羊膜绒毛膜炎,将导致早产。 展开更多
关键词 胎膜 妊娠 早产
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