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2-8 SimCSR Program for the Simulation of the isochronous Mass Spectrometry at the HIRFL-CSR

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IMP & HIRFL Annual Report 2014年第1期 39-40页

作者： Chen Ruijiu Yuan Youjin Wang Meng Xu Xing Shuai Peng Zhang Yuhu Yan Xinliang Xing Yuanming Xu Hushan Zhou Xiaohong Litvinov Yuri Litvinov Sergy Chen Xiangcheng Fu Chaoyi Ge Wenwen Ge Zhuang Hu Xuejing Huang Wenjia Liu Dawei Zeng Qi Zhang Wei 不详

Until now, several isochronous mass spectrometry (IMS) experiments have been successfully performed usingvarious primary beams at the HIRFL-CSR and masses of both proton-rich and proton-deficient exotic nuclei havebeen measured. In order to improve the performance of the IMS experiments and to provide a reliable tool fordesigning and preparing the future experiments, a simulation code, named SimCSR is ***, six-dimension phase-space linear transmission theory is applied to simulate the transmission of ionsin the experimental storage ring (CSRe). The basic algorithm is Bf = MBi. The Bi and Bf are six-dimensionphase-space vectors of ions at the entrance and exit of each element of the CSRe lattice, respectively. M is a6-by-6-dimension first-order transfer matrix of each element. M is calculated using formulas described in Ref.[1]. Inthe simulations, the ring lattice is considered in detail, and the same magnetic setting as in our previous experimentwith 58Ni projectile fragments[2] is considered. The ions are assumed to circulate 300 turns inside the CSRe.

关键词： SimCSR Program isochronous

2-4 First isochronous Mass Measurement in Neutron-rich Region at CSRe

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IMP & HIRFL Annual Report 2014年第1期 33-34页

作者： Xu Xing Wang Meng Zhang Yuhu Xu Hushan Tu Xiaolin Yu.A.Litvinov Zhou Xiaohong Sun Baohua Yuan Youjin Xia Jiawen Yang Jiancheng K.Blaum Chen Ruijiu Chen Xiangchen Fu Chaoyi Ge Zhuang Hu Zhengguo Huang Wenjia Liu Dawei Y.H.Lam Ma Xinwen Mao Ruishi T.Uesaka Xiao Guoqing Xing Yuanming T.Yamaguchi Y.Yamaguchi Zeng Qi Yan Xinliang Zhao Hongwei Zhao Tiecheng Zhang Wei Zhan Wenlong 不详

Mass is one of the fundamental properties of atomic nuclei. isochronous mass spectrometry (IMS), using astorage ring combined with an in-flight separator, has been shown to be a powerful tool for mass measurementof exotic nuclei[1]. Recently, masses of many proton-rich nuclides were accurately determined at the HIRFL-CSRfacility[2]. In this paper, we described the first isochronous mass measurement of neutron-rich nuclides at *** experiment was performed at the end of 2011. In the experiment, the primary beam of 86Kr28+ ions wasaccumulated and accelerated to an energy of 460.65 MeV/u in the synchrotron CSRm. The 86Kr28+ ions were fastextracted and focused on a 15 mm thick beryllium target which was placed at the entrance of the RIBLL2 (anin-flight fragment separator).

关键词： isochronous Mass Measurement

2-4 Principle of isochronous Mass Spectrometry Using Two Time-of-flight Detectors

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IMP & HIRFL Annual Report 2015年第1期 53-54页

作者： Xu Xing Shuai Peng Zhang Yuhu Wang Meng Tu Xiaolin Xu Hushan Yuan Youjin Chen Xiangchen Chen Ruijiu Yan Xinliang Bao Tong Fu Chaoyi Ge Zhuang Huang Wenjia Sun Mingze Xing Yuanming Zeng Qi Zhang Peng Zhou Xu 不详

isochronous mass spectrometry (IMS) in storage rings is a powerful tool for mass measurements of exotic nucle with very short half-lives down to several tens of microseconds, using a multicomponent secondary beam separated in-ight without cooling. However, the inevitable momentum spread of secondary ions limits the precision of nuclear masses determined by using IMS.

关键词： isochronous Mass Spectrometry

2-7 Charge and Frequency Resolved isochronous Mass Spectrometry in Storage Rings: First Direct Mass Measurement of the Short-lived Neutron-de cient 51Co Nuclide

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IMP & HIRFL Annual Report 2014年第1期 38-39页

作者： Shuai Peng Xu Hushan Tu Xiaolin Zhang Yuhu Sun Baohua Yu.A.Litvinov Yan Xinliang K.Blaum Wang Meng Zhou Xiaohong He Jianjun Sun Yang K.Kaneko Yuan Youjin Xia Jiawen Yang Jiancheng G.Audi Chen Xiangcheng Jia Guobin Hu Zhengguo Ma Xinwen Mao Ruishi Mei Bo Sun Zhiyu Wang Shitao Xiao Guoqing Xu Xing T.Yamaguchi Y.Yamaguchi Zang Yongdong Zhao Hongwei Zhao Tiecheng Zhang Wei Zhan Wenlong 不详

isochronous mass spectrometry in storage rings is a successful technique for the precision mass measurements ofthe nuclides with half-lives down to tens of microseconds[1]. Since the isochronous condition =t greatly reducesthe influence of the velocity difference on the ion revolution periods, the revolution period difference ΔT =T ??TRof a stored ion with respect to a reference time TR is directly related to its mass-to-charge ratio difference Δ(m=q),written in the first order as:

关键词： Frequency Resolved isochronous

2-6 First isochronous Mass Measurements with Two Time-of-Flight Detectors at CSRe

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IMP & HIRFL Annual Report 2014年第1期 37-37页

作者： Xing Yuanming Zhang Yuhu Wang Meng Xu Hushan Shuai Peng Xu Xing Chen Ruijiu Yan Xinliang Tu Xiaolin Zhang Wei Fu Chaoyi Zeng Qi Yu.A.Litvinov K.Blaum Chen Xiangcheng Ge Zhuang Gao Bingshui Huang Wenjia S.A.Litvinov Liu Dawei Ma Xinwen Mao Ruishi Xiao Guoqing Yang Jiancheng Yuan Youjin Zhou Xiaohong 不详

In conventional isochronous mass spectrometry (IMS), single time-of-flight (TOF) method is adopted to measurethe ions' revolution times in a storage ring which can then be used to calculate the ions' masses. However, themass-to-charge ratio (m=q) is only related to the revolution time (T) under the condition that is equal to taccording to the following equation:

关键词： isochronous Mass Measurements

The physics design of magnet in 14 MeV cyclotron

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 266-270页

作者： ZHONG JunQing ZHANG TianJue LI Ming LV YinLong CUI Tao YANG JianJun XING JianSheng China Institute of Atomic Energy Beijing 102413China

The 14 MeV, 400 μA compact cyclotron is under construction at China Institute of Atomic Energy (CIAE). The design of main magnet and the result of beam dynamics in the cyclotron will be described in this paper, including the choice of main parameters of magnet, the method of shimming isochronous field in the compact cyclotron and optimization of the magnetic field in central region. The beam will be accelerated to 14.6 MeV by optimizing the magnet structure.

关键词： main magnet shimming isochronous field beam dynamics shape function

OPERATING POINT AND STRIPPING EXTRACTION CALCULATIONS FOR CYCLONE 10/5

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Nuclear Science and Techniques 1992年第1期3卷 30-35页

作者：王良明 S.Zaremba Ion Beam Applications s.a. Chemin du Cyclotron 2 B-1348 Louvain-la-Neuve Belgium

By using the magnetic field map, equilibrium orbit, operating point of v r and v z and beam trajectories after stripper for Cyclone 10/5 have been calculated. The positions of two strippers and two targets have been d... 详细信息

关键词： isochronous cyclotron Operating point Revolution frequency Betatron Oscillation frequency Equilibrium orbit Stripping extraction

Research Progress in the CSRe Fine Nuclear Spectroscopy Group

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IMP & HIRFL Annual Report 2017年第1期 25-26页

作者： Zhang Yuhu Wang Meng 不详

The research group of CSRe fine nuclear spectroscopy has been working on the precision mass measurements of short lived nuclei based on the isochronous mass *** research activities are mainly focused on two *** is the improvements of detection techniques and data analysis methods,the other is the investigations on nuclear structures and nuclear astrophysics based on the new mass values from the experiments.

关键词： spectrometry. spectroscopy isochronous

On English Rhythm Level of Nonnative English Learners

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On English Rhythm Level of Nonnative English Learners