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Modeling of ion cyclotron resonance frequency heating of proton-boron plasmas in EHL-2 spherical tokamak

Plasma Science and Technology 2024年第10期26卷 39-48页

作者： Xianshu WU Jingchun LI Jiaqi DONG Yuejiang SHI Guoqing LIU Yong LIU Zhiqiang LONG Buqing ZHANG baoshan yuan Y.K.Martin PENG Minsheng LIU Shenzhen Key Laboratory of Nuclear and Radiation Safety Institute for Advanced Study in Nuclear Energy&SafetyCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 510640People’s Republic of China Department of Earth and Space Sciences Southern University of Science and TechnologyShenzhen 518055People’s Republic of China ENN Science and Technology Development Co. Ltd.and Hebei Key Laboratory of Compact FusionLangfang 065001People’s Republic of China Siemens Shenzhen Magnetic Resonance Ltd. Shenzhen 518057People’s Republic of China

Ion cyclotron resonance heating(ICRH)stands out as a widely utilized and cost-effective auxiliary method for plasma heating,bearing significant importance in achieving high-performance discharges in p-^(11)B *** light of the specific context of p-^(11)B plasma in the EHL-2 device,we conducted a comprehensive scan of the fundamental physical parameters of the antenna using the full-wave simulation program *** preliminary result indicated that for p-^(11)B plasma,optimal ion heating parameters include a frequency of 40 MHz,with a high toroidal mode number like N_(?)=28 to heat the majority H *** addition,we discussed the impact of concentration of minority ion species on ion cyclotron resonance heating when^(11)B serves as the heavy minority *** significant difference in charge-to-mass ratio between boron and hydrogen ions results in a considerable distance between the hybrid resonance layer and the tow inverted cyclotron resonance layer,necessitating a quite low boron ion concentration to achieve effective minority *** also considered another method of direct heating of hydrogen ions in the presence of boron ion *** is found that at appropriate boron ion concentrations(X(^(11)B)~17%),the position of the hybrid resonance layer approaches that of the hydrogen ion cyclotron resonance layer,thereby altering the polarization at this position and significantly enhancing hydrogen ion fundamental absorption.

关键词： ICRF hydrogen-boron fusion mode conversion fundamental absorption

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Experimental confirmation of the linear relation between plasma current and external vertical magnetic field in EXL-50 spherical torus energetic electron plasmas

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Plasma Science and Technology 2024年第8期26卷 32-36页

作者：董力立王明远刘文军石跃江董家齐郭栋孙恬恬顾翔宋显明袁保山彭元凯 the ENN Team Hebei Key Laboratory of Compact Fusion Langfang 065001People’s Republic of China School of Mathematics and Physics Anqing Normal UniversityAnqing 246133People’s Republic of China ENN Science and Technology Development Co.Ltd. Langfang 065001People’s Republic of China

A three-fluid equilibrium plasma with bulk plasma and energetic electrons has been observed on the Xuanlong-50(EXL-50) spherical torus, where the energetic electrons play a crucial role in sustaining the plasma current and pressure. In this study, the equilibrium of a multi-fluid plasma was investigated by analyzing the relationship between the external vertical magnetic field(B_(V)),plasma current(I_(p)), the poloidal ratio(β_(p)) and the Shafranov formula. Remarkably, our research demonstrates some validity of the Shafranov formula in the presence of multi-fluid plasma in EXL-50 spherical torus. This finding holds significant importance for future reactors as it allows for differentiation between alpha particles and background plasma. The study of multi-fluid plasma provides a significant reference value for the equilibrium reconstruction of burning plasma involving alpha particles.

关键词： plasma equilibrium Shafranov formula multi-fluid plasma

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Enhancing alkyne semi-hydrogenation through engineering metal-support interactions of Pd on oxides

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Nano Research 2024年第5期17卷 3707-3713页

作者： Yuefeng Wu Xiaotong Lu Pengfei Cui Wenyu Jia Jun Zhou yuan Wang Hussain Zahid Yuxin Wu Muhammad Umer Rafique Xiong Yin baoshan Li Leyu Wang Guolei Xiang State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemical Engineering Beijing University of Chemical TechnologyBeijing 100029China

Supported Pd catalysts show superior activities for olefin productions from alkynes through semi-hydrogenation reactions,but over-hydrogenation into alkanes highly decreases olefin *** phenylacetylene semi-hydrogenation as a model reaction,here we explore the optimization approaches toward better Pd catalysts for alkyne semi-hydrogenation through investigating support effect and metal-support *** results show that the states of Pd with supports can be tuned by varying oxide reducibility,loading ratios,and *** our system,0.06 wt.%Pd on rutile-TiO_(2) nanorods shows the highest activity owing to the synergistic effects of single-atoms and *** reducibility can change the filling degrees of Pd 4d orbitals through varying interfacial bonding strengths,which further affect catalytic activity and selectivity.

关键词： alkyne semi-hydrogenation support effect metal-support interaction Pd catalyst single-atom catalyst

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Computation of the Magnetic Field and Ripple for the Toroidal Coils in HL-2M Tokamak

Southwestern Institute of Physics Annual Report

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Southwestern Institute of Physics Annual Report 2006年第1期 128-129页

作者： LONG Yongxing MOU Zongze JIAN Guangde SUN Aiping yuan baoshan GAO Qingdi WANG Aike

The magnetic induction and its ripple due to reconstructive toroidal coils are calculated. The field ripple is so small that the influence of ripple can be omitted for the plasma discharge.

关键词： Magnetic field analysis Ripple HL-2M

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Identification and Analysis of Magnetic Structures on HL-2A

Southwestern Institute of Physics Annual Report

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Southwestern Institute of Physics Annual Report 2006年第1期 53-54页

作者： JI Xiaoquan YANG Qingwei FENG Beibing ZHOU Hangyu yuan baoshan CHEN Wei YANG Zhoujun

1 Introduction Tearing modes in tokamak plasmas have been studied for many years In HL-2A tokamak, MHD instabilities are investigated by means of the Mirnov probes. The mode number can be determined by the methods of phase comparison analysis or correlation analysis from the experimental data of Mirnov probes, but the analysis of complicated mode structures is difficult. An identification and analysis method of magnetic islands is presented basing on simulation of the perturbation current and magnetic field in plasmas.

关键词：磁性结构 HL-2A 原子核等离子体核反应

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Synergetic Effects of Runaway Electron and Vertical Instability on the Wall Damage on HL-2A Tokamak

Southwestern Institute of Physics Annual Report

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Southwestern Institute of Physics Annual Report 2005年第1期 17-19页

作者： YANG Yinwei yuan baoshan YANG Qingwei ZHANG Yipo SONG Xianying LI Xu ZHENG Yinjia CAO Zeng

1 Generation of vertical instability Tokamak experiments show that the energy confinement time and performance are better, and the larger plasma current can be achieved for non-circular cross-sectional shape of plasma than circular cross-section. However, the external magnetic fields which are used to produce the non-circular cross sectional shape also cause the confined plasma to become unstable to small vertical displacement. In general, the ratio of elongation k is larger, the possibility of instability is more. In practice, this vertical displacement mode stabilized by feedback control system or other provided external radial magnetic field to balance out the plasma motion. Under some of situations the control system may be fail due to rapid growth rate of instability exceeding the ability of controlling. The plasma will then move vertically upwards or downwards depending upon the characteristics of instability and control failure.

关键词： Runaway electron Vertical displacement episode(VDE) Halo current

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PIF4 interacts with ABI4 to serve as a transcriptional activator complex to promote seed dormancy by enhancing ABA biosynthesis and signaling

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Journal of Integrative Plant Biology 2024年第5期66卷 909-927页

作者： Xiaofeng Luo Yujia Dai baoshan Xian Jiahui Xu Ranran Zhang Muhammad Saad Rehmani Chuan Zheng Xiaoting Zhao Kaitao Mao Xiaotong Ren Shaowei Wei Lei Wang Juan He Weiming Tan Junbo Du Weiguo Liu Shu yuan Kai Shu Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection School of Ecology and EnvironmentNorthwestern Polytechnical UniversityXi'an 710129China Research&Development Institute of Northwestern Polytechnical University in ShenzhenShenzhen 518057China College of Agronomy and Biotechnology China Agricultural UniversityBeijing 100193China Institute of Ecological Agriculture Sichuan Agricultural UniversityChengdu 611130China College of Resources Sichuan Agricultural UniversityChengdu 611130China

Transcriptional regulation plays a key role in the control of seed dormancy,and many transcription factors(TFs)have been ***,the mechanisms underlying the interactions between different TFs within a transcriptional complex regulating seed dormancy remain largely ***,we showed that TF PHYTOCHROME-INTERACTING FACTOR4(PIF4)physically interacted with the abscisic acid(ABA)signaling responsive TF ABSCISIC ACID INSENSITIVE4(ABI4)to act as a transcriptional complex to promote ABA biosynthesis and signaling,finally deepening primary seed *** pif4 and abi4 single mutants exhibited a decreased primary seed dormancy phenotype,with a synergistic effect in the pif4/abi4 double ***4 binds to ABI4 to form a heterodimer,and ABI4 stabilizes PIF4 at the protein level,whereas PIF4 does not affect the protein stabilization of ***,both TFs independently and synergistically promoted the expression of ABI4 and NCED6,a key gene for ABA *** genetic evidence is also consistent with the phenotypic,physiological and biochemical analysis ***,this study revealed a transcriptional regulatory cascade in which the PIF4–ABI4 transcriptional activator complex synergistically enhanced seed dormancy by facilitating ABA biosynthesis and signaling.

关键词： ABA ABI4 PIF4 seed dormancy and germination transcriptional complex

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B细胞及其IgG亚类在非小细胞肺癌患者中的分布及临床意义

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中华微生物学和免疫学杂志 2015年第11期35卷 816-820页

作者：杨姗姗刘天明袁宝山安然艾清吉林大学第一医院二部检验科长春130021

目的研究非小细胞肺癌（non-small cell lungcancer，NSCLC）患者外周血中B细胞亚群及IgG亚类的分布情况，探讨不同B细胞及IgG在NSCLC疾病进展过程中的作用。方法应用流式细胞仪，在55例处于不同临床分期的非小细胞肺癌患者及25例健康... 详细信息

目的研究非小细胞肺癌（non-small cell lungcancer，NSCLC）患者外周血中B细胞亚群及IgG亚类的分布情况，探讨不同B细胞及IgG在NSCLC疾病进展过程中的作用。方法应用流式细胞仪，在55例处于不同临床分期的非小细胞肺癌患者及25例健康对照中检测外周血幼稚B细胞、记忆性B细胞和成熟B细胞的分布；应用ELISA方法检测不同分期的NSCLC患者血清中IgG1、IgG2、IgG3和IgG4含量及其在总IgG中所占的比例。结果幼稚B细胞和记忆性B细胞在CD19^＋B细胞中所占比例与非小细胞肺癌的发展呈正相关，同时IgG4／IgG比例也随着非小细胞癌疾病发展逐渐升高，而其他3种IgG亚类与健康对照组相比则无明显变化。结论非小细胞肺癌患者体内B细胞亚群分布失衡及IgG4／IgG比例升高与非小细胞肺癌进展密切相关。明确B细胞亚群分布特点及其是否与IgG4比例升高有直接关系，这对我们寻求有效的非小细胞肺癌免疫治疗方法具有重要的意义。

关键词：非小细胞肺癌 B淋巴细胞免疫球蛋白

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2008年M_(W)7.9汶川地震早期余震频度衰减速率空间分布特征分析

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地球物理学报 2024年第8期67卷 3017-3031页

作者：侯金欣王宝善彭志刚袁松湧石家庄铁道大学安全工程与应急管理学院石家庄050043 中国科学技术大学地球和空间科学学院合肥230026 美国佐治亚理工学院地球与大气科学学院佐治亚州亚特兰大30332-0340 中国地震局地球物理研究所地球物理先导技术研究室北京100081

深入认识余震频度衰减及其影响因素对理解余震触发机理和震后应急救援具有重要意义.然而,由于强震后余震数量庞大,波形相互叠加导致了目录中余震缺失,进而影响了余震频度衰减速率的估计.本研究采用模板匹配技术对2008年M_(W)7.9汶川地... 详细信息

深入认识余震频度衰减及其影响因素对理解余震触发机理和震后应急救援具有重要意义.然而,由于强震后余震数量庞大,波形相互叠加导致了目录中余震缺失,进而影响了余震频度衰减速率的估计.本研究采用模板匹配技术对2008年M_(W)7.9汶川地震后约50天内连续数据进行扫描,检测余震数量约为模板地震数量的5倍,完备震级由M3.0降低到M2.3.根据余震沿映秀—北川断裂走向优势深度分布的变化,以映秀、汶川、茂县、北川、南坝为界,余震活动大致可分为6个区域.本研究利用最大似然法分别计算了各个区域的余震频度衰减速率,结果显示:以茂县、青川为界,余震频度衰减速率表现出映秀—北川断裂西南段较快、中间段居中、东北段较慢的特征.将余震频度衰减速率和余震空间分布、断裂类型、震后形变、同震形变等进行对比分析,本研究得到以下结论:1、余震频度衰减速率分区与断裂类型分区吻合.其中,映秀—北川断裂西南段余震频度较快衰减速率区域断裂以逆冲为主,中间段为经过各种震源机制类型交替出现的过渡带,映秀—北川断裂东北段余震频度较慢衰减速率区域断裂以右旋走滑为主;2、余震频度衰减速率西南段较快、东北段较慢的空间分布特征与震后形变特征相一致;3、余震频度衰减速率与同震形变相关性不强.结合本研究观测到的同震滑移量较大区域余震分布较少、部分区域余震数目和震后形变空间分布一致性等特征,我们推测汶川地震早期余震可能主要与震后余滑相关,余震频度衰减速率的空间分布差异主要与不同类型断裂震间滑移速率不同相关,震间滑移速率较快的区域余震频度衰减速率较快及震后形变较大.

关键词：汶川地震模板匹配早期余震频度衰减断裂类型震后形变

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Plasma Behavior with Hydrogen Supersonic Molecular Beam and Cluster Jet Injection in the HL-2A Tokamak

Southwestern Institute of Physics Annual Report

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Southwestern Institute of Physics Annual Report 2006年第1期 25-26页

作者： YAO Lianghua FENG Beibing CHEN Chengyuan SHI Zhongbing yuan baoshan XIAO Weiwen ZHOU Yan SUN Hongjuan LU Jie DUAN Xuru PAN Yudong HONG Wenyu LI Wei RAN Hong DING Xuantong LIU Yong

After more than ten years of practice, SMBI has been developed to become a useful fuelling method that is already considered to be an improvement over conventional gas puffing （GP）. The HL-2A tokamak is the first tokamak with divertors in China. The main parameters of HL-2A are R = 1.65 m, α=0.4 m, BT=2.8 T and Ip=0.48 MA. The divertor of the machine now is operated with lower single null configuration. Large hydrogen cluster （〉100 atoms） can be produced at low temperature gas.

关键词：等离子体 HL-2A 氢分子束核反应堆

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