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Physical design and recent experimental results of the new ICRF antenna on EAST

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Plasma Science and Technology 2024年第6期26卷 169-176页

作者：杨桦张新军袁帅秦成明张伟 G.URBANCZYK 钱金平刘鲁南王高翔陈青青 institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China institut Jean Lamour UMR 7198 CNRS-Universitéde Lorraine 2 allée André GuinierNancy 54011France University of Science and Technology of China Hefei 230026People’s Republic of China

Two new ICRF antennas operating in the ion cyclotron radio frequency(ICRF) range have been developed for EAST to overcome the low coupling problem of the original *** original ICRF antennas were limited in their power capacity due to insufficient *** new antenna design takes into account both wave coupling and absorption processes through comprehensive wave coupling and absorption codes,with the dominant parallel wave number k∥of 7.5 m-1at dipole *** the use of these new ICRF antennas,we are able to achieve 3.8 MW output power and 360 s operation,*** initial experimental results demonstrate the reliability of the antenna design method.

关键词： ICRF antenna coupling EAST

Impact of T_(i)/T_(e )ratio on ion transport based on EAST H-mode plasmas

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Plasma Science and Technology 2024年第4期26卷 68-78页

作者：刘建文臧庆梁云峰陈佳乐邬潇河 Alexander KNIEPS 扈嘉辉金仡飞张斌储宇奇刘海庆吕波段艳敏李妙辉陈颖杰龚先祖 the EAST Team institute of Plasma Physics Chinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikPartner of the Trilateral Euregio Cluster(TEC)Jülich 52425Germany

At the EAST tokamak, the ion temperature(T_(i)) is observed to be clamped around 1.25 keV in electron cyclotron resonance(ECR)-heated plasmas, even at core electron temperatures up to 10 keV(depending on the ECR heating power and the plasma density). This clamping results from the lack of direct ion heating and high levels of turbulence-driven transport. Turbulent transport analysis shows that trapped electron mode and electron temperature gradient-driven modes are the most unstable modes in the core of ECR-heated H-mode plasmas. Nevertheless, recently it was found that the T_(i)/T_(e)ratio can increase further with the fraction of the neutral beam injection(NBI) power, which leads to a higher core ion temperature(Ti0). In NBI heating-dominant H-mode plasmas, the ion temperature gradient-driven modes become the most unstable ***, a strong and broad internal transport barrier(ITB) can form at the plasma core in high-power NBI-heated H-mode plasmas when the T_(i)/T_(e)ratio approaches ~1, which results in steep core Teand Tiprofiles, as well as a peaked neprofile. Power balance analysis shows a weaker Teprofile stiffness after the formation of ITBs in the core plasma region, where Ticlamping is broken,and the core Tican increase further above 2 keV, which is 80% higher than the value of Ticlamping in ECR-heated plasmas. This finding proposes a possible solution to the problem of Ticlamping on EAST and demonstrates an advanced operational regime with the formation of a strong and broad ITB for future fusion plasmas dominated by electron heating.

关键词： ion temperature clamping transport neutral beam injection stiffness internal transport barrier

Correlation ofⅢ/Ⅴsemiconductor etch results with physical parameters of high-density reactive plasmas excited by electron cyclotron resonance

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Plasma Science and Technology 2017年第12期19卷 96-110页

作者： Gerhard FRANZ Ralf MEYER Markus-Christian AMANN Munich University of Applied Sciences Dep.06 34 LothstrasseMunichBavariaD-81730Germany Walter Schottky institut Technische Universitht Miinchen Am CoulomwallGarchingBavariaD-85748Germany

Reactive ion etching is the interaction of reactive plasmas with surfaces. To obtain a detailed understanding of this process, significant properties of reactive composite low-pressure plasmas driven by electron cyclotron resonance（ECR） were investigated and compared with the radial uniformity of the etch rate. The determination of the electronic properties of chlorine-and hydrogen-containing plasmas enabled the understanding of the pressure-dependent behavior of the plasma density and provided better insights into the electronic parameters of reactive etch gases. From the electrical evaluation of I（V） characteristics obtained using a Langmuir probe,plasmas of different compositions were investigated. The standard method of Druyvesteyn to derive the electron energy distribution functions by the second derivative of the I（V）characteristics was replaced by a mathematical model which has been evolved to be more robust against noise, mainly, because the first derivative of the I（V） characteristics is used. Special attention was given to the power of the energy dependence in the exponent. In particular, for plasmas that are generated by ECR with EM modes, the existence of Maxwellian distribution functions is not to be taken as a self-evident fact, but the bi-Maxwellian distribution was proven for Ar-and Kr-stabilized plasmas. In addition to the electron temperature, the global uniform discharge model has been shown to be useful for calculating the neutral gas temperature. To what extent the invasive method of using a Langmuir probe could be replaced with the noninvasive optical method of emission spectroscopy, particularly actinometry, was investigated,and the resulting data exhibited the same relative behavior as the Langmuir data. The correlation with etchrate data reveals the large chemical part of the removal process—most striking when the data is compared with etching in pure argon. Although the relative amount of the radial variation of plasma density and etch rate

关键词： electron cyclotron resonance high-density plasma Langmuir probe EEDF radial plasma density radial uniformity

Investigation of electron cyclotron current drive efficiency on the J-TEXT tokamak

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Plasma Science and Technology 2022年第12期24卷 183-189页

作者： Jiangang FANG Wei YAN Zhongyong CHEN Xiaobo ZHANG Xixuan CHEN Junli ZHANG Feiyue MAO You LI Lingke MOU Yu ZHONG Feng Li Weikang ZHANG Fanxi LIU Guinan ZOU Song ZHOU Da LI Li GAO Donghui XIA Zhoujun YANG Zhipeng CHEN Nengchao WANG Yonghua DING Yunfeng LIANG Yuan PAN the J-TEXT Team International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung-PlasmaphysikD-52425 JülichGermany

Electron cyclotron current drive(ECCD) efficiency research is of great importance for the neoclassical tearing mode(NTM) *** ECCD efficiency is beneficial for the NTM stabilization and the ECCD power threshold *** efficiency has been investigated on the J-TEXT *** electron cyclotron wave(ECW) power scan was performed to obtain the current drive *** current drive efficiency is derived to be approximately η_(0)=(0.06-0.16)×10^(19)A m^(-2)W^(-1)on the J-TEXT *** effect of the residual toroidal electric field has been included in the determination of the current drive efficiency,which will enhance the ECCD *** the plasma current of I_(p)=100 kA and electron density of n_(e)=1.5×10^(19)m^(-3),the ratio of Spitzer conductivity between omhic(OH)and ECCD phases is considered and the experimental data have been *** correction results show that the current drive efficiency η_(1)caused by the fast electron hot conductivity decreases by approximately 79%.It can be estimated that the driven current is approximately 24 kA at 300 kW ECW power.

关键词： electron cyclotron current drive current drive efficiency residual toroidal electric field

Dense matter with eXTP

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Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 28-44页

作者： Anna L.Watts WenFei Yu Juri Poutanen Shu Zhang Sudip Bhattacharyya Slavko Bogdanov Long Ji Alessandro Patruno Thomas E.Riley Pavel Bakala Altan Baykal Federico Bernardini Ignazio Bombaci Edward Brown Yuri Cavecchi Deepto Chakrabarty Jér?me Chenevez Nathalie Degenaar Melania Del Santo Tiziana Di Salvo Victor Doroshenko Maurizio Falanga Robert D.Ferdman Marco Feroci Angelo F.Gambino MingYu Ge Svenja K.Greif Sebastien Guillot Can Gungor Dieter H.Hartmann Kai Hebeler Alexander Heger Jeroen Homan Rosario Iaria Jean in 't Zand Oleg Kargaltsev Aleksi KurkelaTheoretical Physics Department CERN XiaoYu Lai Ang Li XiangDong Li ZhaoSheng Li Manuel Linares FangJun Lu Simin Mahmoodifar Mariano Méndez M.Coleman Miller Sharon Morsink Joonas N?ttil? Andrea Possenti Chanda Prescod-Weinstein JinLu Qu Alessandro Riggio Tuomo Salmi Andrea Sanna Andrea Santangelo Hendrik Schatz Achim Schwenk LiMing Song Eva?rámková Benjamin Stappers Holger Stiele Tod Strohmayer Ingo Tews Laura Tolos Gabriel T?r?k David Tsang Martin Urbanec Andrea Vacchi RenXin Xu YuPeng Xu Silvia Zane GuoBao Zhang ShuangNan Zhang WenDa Zhang ShiJie Zheng Xia Zhou Anton Pannekoek institute for Astronomy University of Amsterdam Shanghai Astronomical Observatory Tuorla Observatory Department of Physics and Astronomy University of Turku Nordita KTH Royal Institute of Technology and Stockholm University institute of High Energy Physics Chinese Academy Sciences Tata institute of Fundamental Research Columbia Astrophysics Laboratory Columbia University institut für Astronomie und Astrophysik Tübingen Universit?t Tübingen Leiden Observatory Leiden University Research Center for Computational Physics and Data Processing Silesian University in Opava Physics Department Middle East Technical University INAF Osservatorio Astronomico di Roma New York University Abu Dhabi Dipartimento di Fisica Enrico Fermi University of Pisa INFN Italian National institute for Nuclear Physics Department of Physics and Astronomy Michigan State University Department of Astrophysical Sciences Princeton University Mathematical Sciences and STAG Research Centre University of Southampton MIT Kavli institute for Astrophysics and Space Research DTU Space Technical University of Denmark INAF/IASF Palermo via Ugo La Malfa 153 Universita degli Studi di Palermo Dipartimento di Fisica e Chimica International Space Science institute (ISSI) Faculty of Science University of East Anglia INAF Istituto di Astrofisica e Planetologie Spaziali institut für Kernphysik Technische Universit?t Darmstadt ExtreMe Matter institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH instituto de Astrof'?sica Pontificia Universidad Católica de Chile Department of Physics & Astronomy Kinard Lab of Physics Clemson University School of Physics and Astronomy Monash University SRON Netherlands institute for Space Research Department of Physics The George Washington University Faculty of Science and Technology University of Stavanger School of Physics and Mechanical & Electrical Engineering Hubei University of Education Department of Astronomy Xiamen University (Haiyun Campus) School of Astronomy and Space

In this White Paper we present the potential of the Enhanced X-ray Timing and Polarimetry(eXTP) mission for determining the nature of dense matter; neutron star cores host an extreme density regime which cannot be replicated in a terrestrial laboratory. The tightest statistical constraints on the dense matter equation of state will come from pulse profile modelling of accretion-powered pulsars, burst oscillation sources, and rotation-powered pulsars. Additional constraints will derive from spin measurements, burst spectra, and properties of the accretion flows in the vicinity of the neutron star. Under development by an international Consortium led by the institute of High Energy Physics of the Chinese Academy of Sciences, the eXTP mission is expected to be launched in the mid 2020 s.

关键词： neutron X-rays dense matter equation of state

中能区64Zn+27Al反应中集体流的实验研究

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中能区64Zn+27Al反应中集体流的实验研究

HIRFL-SFC新终端ODS铁素体的122MeV Ne离子辐照实验(英文)

第九届全国核物理大会

作者：贺智勇 J.Peter J.C.Angelique A.Auger G.Bizard R.Brou A.Buta C.Cabot E.Crema D.Cussol Y.El Masri Ph.Eudes M.Gonin K.Hagel A.Kerambrum C.Lebrun A.Peghaire R.Popescu R.Regimbart E.Rosato F.Saint-Laurent J.C,Steckmeyer B.Tamain E.Vient R.Wada 中国科学院近代物理研究所 LPC Caen ISMRAIN2P3—CNRS14050 CAEN CEDEXFRANCE GANIL BP5027 14021 CAEN CEDEXFRANCE institut de Physique Nuclear UCL1348 Louvain—La—NeuveBELGIUM LPN Universite de Nantes44072 NANTES CEDEXFRANCE cyclotron institut Texas A&M UniversityCollege StationTX77843USA

核物质集体流的研究是重离子碰撞中很重要的一个研究课题,通过它可以探讨核物质状态方程．压缩效应和重离子碰撞动力学等．最近,我们在中能区观察到了集体流及其消失,买验是在法国 GANIL 加速器上进行的,用49,57,69和79 MeV/u 的“Zn ...

核物质集体流的研究是重离子碰撞中很重要的一个研究课题,通过它可以探讨核物质状态方程．压缩效应和重离子碰撞动力学等．最近,我们在中能区观察到了集体流及其消失,买验是在法国 GANIL 加速器上进行的,用49,57,69和79 MeV/u 的“Zn 束轰击Al 靶．前角3°至30°间粒子的探测由96块塑料闪烁体片组成的塑闪墙完成,塑闪墙分七环,靶距210cm．中后角30°至150°间

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来源： cnki会议评论

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cnki会议

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IMP & HIRFL Annual Report 2012年 127-128页

作者：张崇宏 Song Yin Yang Yitao Zhang Liqing Gou Jie Li Jianjian Meng Yancheng Jiachao Chen J.S.Jang Paul Scherrer institut Villigen PSI Korea Atomic Energy Research institute

The Sector-focused cyclotron(SFC)at HIRFL is a useful tool to simulate radiation damage in materials candidate to advanced nuclear reactors,because it can supply heavy ions ranging from12C to 238 U in high beam density,with kinetic energies typically in the range 1～10 MeV/u,which can penetrate pure iron up to 31micrometers in depth and produce atomic displacement at a rate around 0.1dpa/*** meet a variety of demand for irradiation of candidate materials,we recently developed a new chamber at the termi-

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Study of the fast electron behavior in electron cyclotron current driven plasma on J-TEXT

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Plasma Science and Technology 2022年第6期24卷 45-52页

作者： Xiaobo ZHANG Wei YAN Zhongyong CHEN Jiangang FANG Junli ZHANG You LI Xixuan CHEN Yunong WEI Ruihai TONG Zhifang LIN Yu ZHONG Lingke MOU Feng LI Weikang ZHANG Lu WANG Donghui XIA Zhonghe JIANG Zhoujun YANG Nengchao WANG Zhipeng CHEN Yonghua DING Yunfeng LIANG Yan PAN the J-TEXT Team International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People's Republic of China Southwestern institute of Physics Chengdu 610041People's Republic of China School of Electrical Engineering&Automation Jiangsu Normal UniversityXuzhou 221116People's Republic of China institute of Plasma Physics Chinese Academy of SciencesHefei 230031People's Republic of China Forschungszentrum Jülich GmbH Institut für Energie-und Klimaforschung—PlasmaphysikD-52425 JülichGermany

In J-TEXT tokamak,fast electron bremsstrahlung diagnostic with 9 chords equipped with multichannel analyzer enables detailed studies of the generation and transport of fast *** spatial profiles and energy spectrum of the fast electrons have been measured in two ECCD cases with either on-axis or off-axis injection,and the profiles processed by Abel-inversion are consistent with the calculated power deposition ***,it is observed that the energy of fast electrons increases rapidly after turning off the ECCD,which may be attributed to the acceleration by the recovered loop voltage at low electron density.

关键词： fast electron tokamak electron cyclotron current drive power deposition location

miniSCIDOM: a scintillator-based tomograph for volumetric dose reconstruction of single laser-driven proton bunches

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High Power Laser Science and Engineering 2024年第2期12卷 41-50页

作者： A.Corvino M.Reimold E.Beyreuther F.-E.Brack F.Kroll J.Pawelke J.D.Schilz M.Schneider U.Schramm M.E.P.Umlandt K.Zeil T.Ziegler J.Metzkes-Ng Helmholtz-Zentrum Dresden–Rossendorf DresdenGermany Technische Universität Dresden DresdenGermany OncoRay–National Center for Radiation Research in Oncology Faculty of Medicine and University Hospital Carl Gustav CarusTUD Dresden University of TechnologyHelmholtz-Zentrum Dresden–RossendorfDresdenGermany Current affiliation:institut Curie UniversitéPSLCNRS UMR3347OrsayFrance Current affiliation:Universitätsklinikum Freiburg FreiburgGermany

Laser plasma accelerators(LPAs)enable the generation of intense and short proton bunches on a micrometre scale,thus offering new experimental capabilities to research fields such as ultra-high dose rate radiobiology or material *** spectrally broadband,laser-accelerated proton bunches allow for tailored volumetric dose deposition in a sample via single bunches to excite or probe specific sample *** rising number of such experiments indicates a need for diagnostics providing spatially resolved characterization of dose distributions with volumes of approximately 1 cm^(3) for single proton bunches to allow for fast online *** we present the scintillator-based miniSCIDOM detector for online single-bunch tomographic reconstruction of dose distributions in volumes of up to approximately 1 cm^(3).The detector achieves a spatial resolution below 500μm and a sensitivity of 100 *** detector performance is tested at a proton therapy cyclotron and an LPA proton *** experiments’primary focus is the characterization of the scintillator’s ionization quenching behaviour.

关键词： beam monitoring detectors laser-driven proton beams scintillator-based diagnostics ultra-high dose rate