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| 1 | Monitoring of atmospheric radionuclides from the Fukushima nuclear accident and assessing their impact on Xi'an, China显示文摘Aerosol radionuclides (131I, 134Cs, 137Cs) and gaseous radioactive xenon (133Xe) were monitored at Xi'an, China following the accident at the Fukushima nuclear power plant in March 2011. The additional annual effective dose attributable to the Fukushima emissions was much lower than the public annual effective dose from natural radiation, according to Chinese national standards. The monitoring results were compared with data from other countries as well as with the radionuclide concentrations observed in Xi'an after the Chernobyl nuclear accident in 1986. Possible transport pathways of the released radionuclides from Fukushima to Xi'an were investigated. The occurrence of an anticyclone in the Pacific Ocean region and the extended period over which the radionuclides were released made the determination transport pathways complex, but divergence in the plume and easterly flow evidently brought the initial suite of radionuclides to Xi'an. | LIU LongBo WU Shan CAO JunJi XIE Feng SHI QuanLin ZHANG ChangYun TANG HanBing HE XiaoBin ZHANG Rong CHEN LiYun WEI GuanYi ZHANG ZhiHong ZHANG JiaMei DANG HaiJun | 2013 | Chinese Science Bulletin2013，58，13： | 4 |
| 2 | Study on Sampling Technique of Atmospheric Radionuclide显示文摘Atmospheric radionuclide monitoring usually includes two sampling techniques,namely ultra-high volume aerosol samplers to collect atmospheric particles by using filter media,and radioactive noble gas samplers to collect atmospheric noble gas based on adsorption method. Atmospheric sampling techniques have been researched in Northwest Institute of Nuclear Technology since the Comprehensive Nuclear-Test-Ban Treaty( CTBT) was signed in 1996. Several ultra-high volume aerosol samplers and some types of radioactive xenon isotopes samplers had been developed. For the aerosol sampler,the sampling flow is between 450 and 800 m3/h,with the minimum detectable concentration( MDC) of131 I less than5 μBq /m3. For the xenon sampler,the sampling capacity of xenon is more than 4 ml per day,with MDC of133 Xe less than 0. 25 mBq /m3. After the nuclear accident of Fukushima in 2011,monitoring of the atmospheric radionuclide was carried out for 3 months at Xi'an,and part of radionuclide was detected with concentrations higher than their backgrounds in the period,including131 I,134Cs,137 Cs and133Xe. | Wu Shan Liu Longbo Zhang Changyun Tang Hanbing Chen Liyun Wu Yanmin Xie Feng Li Zhiming Shi Quanlin Dang Haijun | 2014 | Meteorological and Environmental Research2014，5，6： | 1 |
| 3 | New developments of HIF injector显示文摘The ultra-high intensity heavy-ion beam is highly pursued for heavy-ion researches and applications.However,it is limited by heavy-ion production of ion source and space-charge-effect in the low energy region.The Heavy-ion Inertial Fusion(HIF)facilities were proposed in 1970s.The HIF injectors have large cavity number and long total length,e.g.,there are 27 injectors in HIDIF and HIBLIC is 30 km in length,and the corresponding HIF facilities are too large and too expensive to be constructed.Recently,ion acceleration technologies have been developing rapidly,especially in the low energy region,where the acceleration of high intensity heavy-ions is realized.Meanwhile,super-conducting(SC)acceleration matures and increases the acceleration gradient in medium and high energy regions.The length of HIF injectors can be shortened to a buildable length of 2.5 km.This paper will present a review of a renewed HIF injector,which adopts multi-beam linac-based cavities. | Liang Lu Wei Ma Chenxing Li Tao He Lei Yang Liepeng Sun Xianbo Xu Wenbing Wang Longbo Shi | 2018 | Matter and Radiation at Extremes2018，3，1： | 1 |
| 4 | A complete assembly of the rice Nipponbare reference genome显示文摘Dear Editor,In 2005,the current commonly used rice reference genome(Oryza sativa ssp.japonica cv.Nipponbare)was initially released by the International Rice Genome Sequencing Project(International Rice Genome Sequencing Project,2005).Thereafter,the reference genome was further updated in 2013 with improved genome assembly(IRGSP-1.0)and gene annotations(MSU7,RAP-DB)(Kawahara et al.,2013;Sakai et al.,2013).In the past 10 years,this reference has been serving as one of the most important genetic resources for subsequent rice functional genomics efforts.As several rice genomes had been assembled into gapless chromosomes with only 2–5 telomeres absent(Li et al.,2021;Song et al.,2021;Zhang et al.,2022),the IRGSP1.0 and its annotations still performed as the most widely used reference.However,limitations of sequencing technology and intricate genomic organization led to an under-representation of complex regions in this reference,leaving a total of 72 major gaps(including 19 telomeres),167 minor gaps,and 779 unknown bases(Kawahara et al.,2013),with an estimated length of3%of the genome unsolved. | Lianguang Shang Wenchuang He Tianyi Wang Yingxue Yang Qiang Xu Xianjia Zhao Longbo Yang Hong Zhang Xiaoxia Li Yang Lv Wu Chen Shuo Cao Xianmeng Wang Bin Zhang Xiangpei Liu Xiaoman Yu Huiying He Hua Wei Yue Leng Chuanlin Shi Mingliang Guo Zhipeng Zhang Bintao Zhang Qiaoling Yuan Hongge Qian Xinglan Cao Yan Cui Qianqian Zhang Xiaofan Dai Congcong Liu Longbiao Guo Yongfeng Zhou Xiaoming Zheng Jue Ruan Zhukuan Cheng Weihua Pan Qian Qian | 2023 | Molecular Plant2023，16，8： | 1 |
| 5 | 6-5 Introduction to Operation Status of ADS Injector IIR FQ System in 2015显示文摘The injector II RFQ accelerator for ADS LINAC had realized 10 mA CW beam acceleration in 2014, and it is the rst milestone for the ADS superconducting LINAC. The main task of the RFQ in 2015 was to maintain a stable and reliable operation status to provide the necessary beam for the commissioning of subsequent superconducting cavities. | Zhang Zhouli Shi Aimin Sun Liepeng Xu Xianbo Shi Longbo Li Chenxing Wang Wenbin Ma Wei Lu Liang He Yuan | 2015 | IMP & HIRFL Annual Report2015，，1： | 0 |
| 6 | Investigating aldehyde and ketone compounds produced from indoor cooking emissions and assessing their health risk to human beings显示文摘Aldehyde and ketone compounds are ubiquitous in the air and prone to adverse effects on human health.Cooking emission is one of the major indoor sources.Aiming to evaluate health risks associated with inhalation exposure to aldehyde and ketone compounds,13 carbonyl compounds(CCs)released from heating 5 edible oils,3 seasonings,and 2 dishes were investigated in a kitchen laboratory.For the scenarios of heating five types of oil,aldehydes accounted for 61.1%-78.0%of the total emission,mainly acetaldehyde,acrolein and hexanal.Comparatively,heating oil with added seasonings released greater concentrations of aldehyde and ketone compounds.The concentration enhancement of larger molecular aldehydes was significantly greater.The emission factors of aldehyde and ketone compounds for cooking the dish of chili friedmeatweremuch greater compared to that of tomato fried eggs.Therefore,food materials also had a great impact on the aldehyde and ketone emissions.Acetone and acetaldehyde were the most abundant CCs in the kitchen.Acrolein concentrations ranged from 235.18 to 498.71μg/m^(3),which was about 100 times greater compared to the guidelines provided by Office of Environmental Health Hazard Assessment(OEHHA).The acetaldehyde inhalation for adultswas 856.83-1515.55μg and 56.23-192.79μg from exposure to chili fried meat and tomato fried eggs,respectively.This exceeds the reference value of 90μg/day provided by OEHHA.The findings of this study provided scientific evidences for the roles of cooking emissions on indoor air quality and human health. | Wei Zhang Zhe Bai Longbo Shi Jung Hyun Son Ling Li Lina Wang Jianmin Chen | 2023 | Journal of Environmental Sciences2023，，5： | 0 |
| 7 | A centromere map based on super pan-genome highlights the structure and function of rice centromeres显示文摘Rice(Oryza sativa)is a significant crop worldwide with a genome shaped by various evolutionary factors.Rice centromeres are crucial for chromosome segregation,and contain some unreported genes.Due to the diverse and complex centromere region,a comprehensive understanding of rice centromere structure and function at the population level is needed.We constructed a high-quality centromere map based on the rice super pangenome consisting of a 251-accession panel comprising both cultivated and wild species of Asian and African rice.We showed that rice centromeres have diverse satellite repeat CentO,which vary across chromosomes and subpopulations,reflecting their distinct evolutionary patterns.We also revealed that long terminal repeats(LTRs),especially young Gypsy-type LTRs,are abundant in the peripheral CentO-enriched regions and drive rice centromere expansion and evolution.Furthermore,high-quality genome assembly and complete telomere-to-telomere(T2T)reference genome enable us to obtain more centromeric genome information despite mapping and cloning of centromere genes being challenging.We investigated the association between structural variations and gene expression in the rice centromere.A centromere gene,OsMAB,which positively regulates rice tiller number,was further confirmed by expression quantitative trait loci,haplotype analysis and clustered regularly interspaced palindromic repeats(CRISPR)/CRISPR-associated protein9 methods.By revealing the new insights into the evolutionary patterns and biological roles of rice centromeres,our finding will facilitate future research on centromere biology and crop improvement. | Yang Lv Congcong Liu Xiaoxia Li Yueying Wang Huiying He Wenchuang He Wu Chen Longbo Yang Xiaofan Dai Xinglan Cao Xiaoman Yu Jiajia Liu Bin Zhang Hua Wei Hong Zhang Hongge Qian Chuanlin Shi Yue Leng Xiangpei Liu Mingliang Guo Xianmeng Wang Zhipeng Zhang Tianyi Wang Bintao Zhang Qiang Xu Yan Cui Qianqian Zhang Qiaoling Yuan Noushin Jahan Jie Ma Xiaoming Zheng Yongfeng Zhou Qian Qian Longbiao Guo Lianguang Shang | 2024 | Journal of Integrative Plant Biology2024，66，2： | 0 |
| 8 | 6-6 Design of RF System for CIADS Injector II RFQ显示文摘A new RF system for a proton linear accelerator named as C-ADS at Institute of Modern Physics (IMP) hasbeen designed and developed to match its related RFQ cavity, which is a quadrilateral four-vane resonator withtwo separate coupling ports and 80 tuners. Its RF system design including mainly all simulation for coupler andtwo-port configuration have also calculated and analysed to be operated in continuous wave (CW) mode with 120kW forward power resulted from the simulated shunt impedance of 45.62 kΩ and accelerating voltage of 65 kV forRFQ resonator, respectively. The design and measurements for the power source, transmission line, two identicalcouplers and power transmission system, even final two-port configuration were finished in the beginning of 2014.Some valuable experiences were accumulated in the original power conditioning and beam experiments on a previousprototype RFQ, which has 560 keV output energy and one-meter size operated by the end of 2013[1]. Until now,on the new RFQ, almost 120 kW CW power have already put into cavity to accelerate 10 mA proton beam, anoverview of the RF system design is to be given, including some specific simulation, even the two-port couplingconfiguration were analysed and evaluated in the paper. | Sun Liepeng Shi Aimin Zhang Zhouli Xu Xianbo Shi Longbo Li Chenxing Wang Wenbin Lu Liang He Yuan | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 9 | 6-9 CW Beam Test of the Injector II RFQ for ADS Project显示文摘As one of the main components of the injector II of China ADS LINAC project, an RFQ working at 162.5 MHzis used to accelerate proton beams of 15 mA from 30 keV to 2.1 MeV. The four vane RFQ has been designed incollaboration with Lawrence Berkeley National Laboratory and built at the workshop of the Institute of ModernPhysics, Chinese Academy of Sciences (IMP, CAS). | Zhang Zhouli He Yuan Shi Aimin Sun Liepen Zhang Bin Jia Huan Wang Jing Pan Gang Shi Longbo Xu Xianbo Li Chenxing Wang Wenbin Wang Xianwu Wu Junxia Wu Qi Zhang Junhui Zhu Tieming Guo Yuhui Zhao Hongwei Liu Yong D. Li S. Virostek M. Hoff A. Lambert J. Staples | 2014 | IMP & HIRFL Annual Report2014，，1： | 0 |
| 10 | LEAF项目建设状态报告显示文摘LEAF or the Low Energy heavy ion Accelerator Facility is a multidiscipline heavy ion research platform under construction at IMP.It is a 5 year National Major Instruments Research Program supported by National Science Foundation of China(NSFC)started in 2015.Oriented to the frontier research in Material Sciences,Astrophysics,Atomic Physics and Highly Charged Ion Physics,LEAF has been designed and constructed with the state of the art technologies for low energy heavy ion acceleration.This facility features a 45 GHz ECR ion source FECR,a heavy ion CW 4-vane radio frequency quadruple accelerator LRFQ,300 kV HV platform,LEBT,MEBT and several dedicated experimental terminals. | Sun Liangting Yang Yao Lu Liang Guo Yuhui Liu Xiaojun Jing Long Li Libin Sun Liepeng Gao Zheng Ma Hongyi Jin Xiaofeng Zhai Yuhan Xu Xianbo Shi Longbo Xing Chaochao Liu Yuting Zhu Tieming Hu Qiang Zhang Peng Zhang Xuezhen Fang Xing Jia Huan Zhang Bin Liu Chaodong Ma Yingming Zhao Bo Wu Beimin Zhu Li Li Jiaqing Lu Wang Guo Junwei Li Chenxing Wang Zhijun Dou Weiping Wu Junxia Zhang Zimin Yao Qinggao Wu Wei Zhou Zhongzu Zhang Junhui Ma Lizhen He Yuan Zhao Hongwei | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 11 | LEAF-MHB多谐波聚束器的机械结构设计及加工进展显示文摘Low Energy highly charged heavy ion Accelerator Facility(LEAF)program was planned in national development project undertaken by IMP.The fundamental goals for LEAF are firstly to produce highly-charged heavy ion beams of several hundred microampere to milliamperes with energies in the range of 0.1100 MeV.Multi Harmonic Buncher(MHB)study equipment consists of three harmonic bunching cavity,piping,power source,etc.,can realize the harmonic bunching to the ion beams.It is very essential for the high acceleration efficiency of LEAF RFQ.The LEAF-MHB’s frequency needs to meet the requirements of 40.625,81.25,and 121.875 MHz harmonics,and can be adapted to the bunching of different types of particles with M/Q from 27.The mechanical structure is shown in Fig.1,and the basic structure parameters are listed in Table 1. | Jin Xiaofeng Sun Liepeng Shi Longbo Zhang Bin | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 12 | Beam Commissioning and Operation of LEAF in 2019显示文摘Beam commissioning with several ion species,such as H2^(+),He^(+),N^(2+).Kr^(13+).Xe^(20+) and so on,was implemented in 2019.The layout of LEAF is shown in Fig.1.The transmission efficiency of the RFQ is higher than 97%with beam intensity at the level of one-hundred microampere. | Yang Yao Zhai Yuhan Guo Yuhui Jing Long Lu Wang Ma Hongyi Zhang Wenhui Sun Liepeng Xu Xianbo Shi Longbo Xing Chaochao Yang Lei He Tao Fang Xing Gao Zheng Chang Jianjun Liu Xiaojun Jin Xiaofeng Sun Liangting He Yuan Zhao Hongwei | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 13 | LEAF项目建设状态报告显示文摘LEAF or the Low Energy heavy ion Accelerator Facility is a multidiscipline heavy ion research platform constructing at IMP.It is a 5-year National Major Instruments Research Program supported by National Science Foundation of China(NSFC)started in 2015.Oriented to the frontier research in material sciences,astrophysics,atomic physics and highly charged ion physics,LEAF has been designed and constructed with the state-of-the-art technologies for low energy heavy ion acceleration.This facility features a 45 GHz ECR ion source FECR,a heavy ion CW 4-vane radio frequency quadruple accelerator LRFQ,300 kV HV platform,LEBT,MEBT and several dedicated experimental terminals.The layout of LEAF is given in Fig.1. | Sun Liangting Lu Liang Jia Huan Yang Yao Zhang Bin Guo Yuhui Gao Zheng Ma Hongyi Jin Xiaofeng Zhu Tieming Hu Qiang Zhang Peng Zhang Xuezhen Fang Xing Jing Long Liu Chaodong Ma Yingming Zhao Bo Wu Beimin Liu Xiaojun Li Jiaqing Lu Wang Guo Junwei Yang Long Li Libin Sun Liepeng Shi Longbo Li Chenxing Ma Wei Wang Zhijun Dou Weiping Wu Junxia Zhang Zimin Yao Qinggao Wu Wei Zhou Zhongzu Zhang Junhui Ma Lizhen He Yuan Zhao Hongwei | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 14 | 6-2 New RF System for RFQ Accelerator of C-ADS Injector II显示文摘According to the design for C-ADS,the failure time are limit strictly by several hours in one year.And previous tetrode amplifier has some problems,such as high sparking risk in input/output cavity,running pressure while high intensity current due to no circulator and so on.However,since the dissipated power in RFQ cavity is very high,the Solid-State Amplifier(SSA)must be designed to output very high power in spite of two couplers feeding power into resonator.Finally,two new 80 kW SSAs were decided to develop considering the power margin and beam loading,which were fabricated by two different manufacturers in order to verify the technologies on high power combining. | Sun Liepeng Shi Longbo Xu Xianbo Li Chenxing Zhang Zhouli Wang Wenbin Lu Liang Shi Aimin He Yuan Zhao Hongwei | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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