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ARCTURUS laser: a versatile high-contrast,high-power multi-beam laser system

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High Power Laser Science and Engineering 2019年第3期7卷 1-11页

作者： M.Cerchez R.Prasad B.Aurand A.L.Giesecke S.Spickermann S.Brauckmann E.Aktan M.Swantusch M.Toncian T.Toncian O.Willi Institut für Laser und Plasmaphysik Heinrich-Heine-Universitat Dusseldorf40225 DusseldorfGermany Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany

With the latest configuration,the Ti:Sa laser system ARCTURUS(Düsseldorf University,Germany)operates with a double-chirped pulse amplification(CPA)architecture delivering pulses with an energy of 7 J before compression in each of the two high-power *** the implementation of a plasma mirror system,the intrinsic laser contrast is enhanced up to 10^-12 on a time scale of hundreds of picoseconds,before the main *** laser system has been used in various configurations for advanced experiments and different studies have been carried out employing the high-power laser beams as a single,high-intensity interaction beam(I≈1020 W/cm^2),in dual-and multi-beam configurations or in a pump–probe arrangement.

关键词： Ti:Sa lasers multi-beam configuration high power laser pulses relativistic plasmas laser driven particle and radiation.sources

The Roper resonance in a finite volume

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Communications in Theoretical Physics 2020年第7期72卷 49-59页

作者： Daniel Severt Ulf-G Meiβner Helmholtz-Institut für Strahlen-und Kernphysik and Bethe Center for Theoretical Physics Universitat BonnD-53115 BonnGermany Institute for Advanced Simulation Institut für Kernphysik and Jülich Center for Hadron PhysicsForschungszentrum JülichD-52425 JiilichGermany Tbilisi State University 0186 TbilisiGeorgia

We calculate the energy levels corresponding to the Roper resonance based on a two-flavor chiral effective Lagrangian for pions,nucleons,deltas,and the Roper resonance at the leading one-loop *** show that the Roper m... 详细信息

关键词： Lattice QCD Roper resonance finite volume methods

Nuclear Dynamics at the Particle Threshold

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原子核物理评论 2015年第2期32卷 129-136页

作者： Nadia Tsoneva Horst Lenske Institut fur Theoretische Physik Universitat Gieβen

Recently, new low-energy modes of excitation called pygmy resonances have been *** distinct feature is the close connection to nuclear skin oscillations. A successful description of the pygmy resonances could be achieved in a microscopic theoretical approach which incorporates the density functional theory and QRPA formalism extended with multi-phonon degrees of freedom. The latter is found of crucial importance for the understanding of the fine structure of nuclear electric and magnetic excitations at low energies. Corresponding microscopic multi-phonon response functions are implemented in the studies of s-process of nucleosynthesis.

关键词： microscopic nuclear model density functional theory extended quasiparticle-random-phase-approximation nucleon-capture reactions stellar nucleosynthesis

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西欧晚泥盆世法门期早期石燕贝类腕足动物

古生物学报 2023年第3期62卷 350-375页

作者：王艺凝马学平 Volker Ebbighausen R.Thomas Becker 北京大学地球与空间科学学院造山带与地壳演化教育部重点实验室北京100871 Geologisch-Palaontologisches Institut und Museum Westfalische Wilhelms-Universitat MunsterD-48149 MunsterGermany

比利时新基尔里斯(Senzeilles)地区是西欧晚泥盆世地层研究的一个经典地区,也是法门期石燕贝类腕足动物的重要比产区。然而针对本区弓石燕类的现代研究却较为匮乏,此外,早期的分类工作已难以满足现代专题性的课题资料要求(即层位清楚、... 详细信息

比利时新基尔里斯(Senzeilles)地区是西欧晚泥盆世地层研究的一个经典地区,也是法门期石燕贝类腕足动物的重要比产区。然而针对本区弓石燕类的现代研究却较为匮乏,此外,早期的分类工作已难以满足现代专题性的课题资料要求(即层位清楚、鉴定准确的系统分类工作),因此对比利时地区法门期的“弓石燕属”足动物进行系统古生物学研究及对比具有重要意义。当前研究在华南现有成果的基础上,通过对壳面特征(贝体大小、基面特征、微细纹饰特征、中槽壳褶发生方式)及内部构造(齿板特征、内窗板特征等)的系统研究及对比,拓展了Plicapustula属的定义,即:褶上和褶间均发育微瘤纹饰。欧洲的Plicapustula属分子褶间均发育放射状细瘤微细纹饰,而华南的该属分子褶间均缺失微瘤纹饰。由于该特征存在明显的地域性,因此当前研究以此为依据建立了Paraplicapustula亚属,并将欧洲的标本归入该亚属。此外,本文还首次识别并描述了欧洲的Sinospirifer属。大部分西欧Sinospirifer属和Plicapustula属与华南地区相比,在种级组成上存在明显的差异,包括标本大小、齿板是否增厚、壳褶数目及分枝情况、微细纹饰类型等。本文共描述了上述2属的5种,包括1新亚属、3新种[Plicapustula(Paraplicapustula) eleganta subgen. et sp. nov. Ma and Wang, Plicapustula(Paraplicapustula) magna subgen. et ***. Ma and Wang, Sinospirifer transversus sp. nov. Ma and Wang, Plicapustula(Paraplicapustula) sp.及Sinospirifer subextensus(Martelli, 1902)]。

关键词：中国石燕褶瘤石燕副褶瘤石燕华南西欧晚泥盆世腕足动物

Validation of atmospheric chemistry measurements from MIPAS,SCIAMACHY,GOMOS onboard ENVISAT by observations of balloon-borne MIPAS-B

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Science China Earth Sciences 2010年第10期53卷 1533-1541页

作者： WETZEL G OELHAF H FRIEDL-VALLON F KLEINERT A LENGEL A MAUCHER G NORDMEYER H GRUNOW K FISCHER H Institute for Meteorology and Climate Research(IMK) Karlsruhe Institute of Technology(KIT) Senate Department for Health Environment and Consumer Protection

In order to validate the atmospheric chemistry measurements by MIPAS,SCIAMACHY,and GOMOS onboard the ENVISAT,three flights of the balloon-borne Michelson Interferometer for Passive Sounding(MIPAS-B) were carried out in 2002 and 2003 at Aire sur l'Adour(France 44°N,0°E) and Esrange,Kiruna(Sweden 68°N,21°E).The validation campaign activities are summarized in this *** MIPAS-B instrument and its data processing procedure as well as the validation approaches are discussed in *** satellite and balloon measurements are matched with high coincidence in time and space,allowing a coincident approach to be applied for their ***,a trajectory model is used to confirm and enhance the statistical significance of the *** validation results show that MIPAS measurements of accuracy for temperature,H2O,O3,HNO3,CH4,N2O,and NO2 are good in the altitude range of 8-39 km(No2,22-39 km).And the precision is good between the altitudes of 15-33 km(No2,22-23 km).However,some exceptions were also found for temperature,H2O,HNO3,and *** SCIAMACHY data of accuracy for O3 and NO2 are within expectations between the altitudes 9-38 km except for O3 in 28-38 *** GOMOS data about O3 and NO2 are promising according to the preliminary comparison results.

关键词： validation ENVISAT MIPAS SCIAMACHY GOMOS MIPAS-B

How the X(5568) Challenges Our understanding of QCD

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Communications in Theoretical Physics 2016年第5期65卷 593-595页

作者：郭奉困 Ulf-G.Mei?ner 邹冰松 Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Helmholtz-Institut fur Strahlen- und Kernphysik and Bethe Center for Theoretical Physics Universitat Bonn Institute for Advanced Simulation Institut fur Kernphysik and Julich Center for Hadron PhysicsForschungszentrum Julich School of Physical Sciences University of Chinese Academy of Sciences

We discuss the X(5568)particle recently announced by the D0 *** types of models were proposed to explain this structure in the *** pointed out by Burns and Swanson(ar Xiv:1603.04366),none of them provides a satisfactory description of the *** provide additional arguments using general properties of QCD,and conclude that the observation of the X(5568),if confirmed,poses serious challenges to our understanding of nonperturbative QCD.

关键词：非微扰QCD 类模型粒子

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BOOK REVIEWS

Journal of Ancient Civilizations 2013年第1期28卷 136-139页

作者： Changyu Liu Seminar für Sprachen und Kulturen des Vorderen Orients–Assyriologie Ruprecht-Karls-Universitat Heidelberg

Review article:OZAKI Tohru and SIGRIST *** in Jerusalem:Sainte-Anne and Saint-étienne.(Periodic Publications on Ancient Civilizations,No.4).Changchun:*** 1004-9371,CN 22–1213/K,Pp.164+70 plates,$50(hardcover).

关键词：书评耶路撒冷古代文明出版物

DEM-CFD study of the filter cake formation process due to non-spherical particles

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Particuology 2020年第6期18卷 48-57页

作者： Ruturaj Deshpande Sergiy Antonyuk Oleg Iliev Fraunhofer Institute for Industrial Mathematics ITWM KaiserslauternGermany Institute of Particle Process Engineering Technische Universitat KaiserslauternKaiserslauternGermany

The formation of a filter cake during the filtration of a suspension with non-spherical particles is studied using a multi-sphere model in a simulation that couples the discrete element method with computational fluid *** implementation of the coupling with a drag model that considers orientation,sphericity,and the presence of surrounding particles for non-spherical particles is tested for single particles and suspensions by comparing the terminal velocities with empirical *** predicted in the simulations,such as the presence or absence of initial oscillations and changes in the orientation of a particle,are consistent with experimental observations reported in the *** variation in the void fraction of a filter cake with respect to the particle sphericity is obtained and compared with experimental trends reported in the ***,complex interdependencies of the particle sphericity,void fraction,and pressure drop of a filter cake for a wide range of fluid conditions are investigated.

关键词： Filter cake formation Discrete element method-computational fluid dynamics simulation Non-spherical particles

Quantification of particle separation using electrostatically charged spray mist in a dust chamber

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Particuology 2021年第5期19卷 92-98页

作者： Marcel Zillgitt Eberhard Schmidt Institute of Particle Technology Rainer Gruenter StraBeBuilding FFCampusFreudenbergBergische Universitat Wuppertal42119 WuppertalGermany

In order to improve the efficiency of reducing fine dust emissions from diffuse sources,the commonly used water mist can be electrostatically ***,the attraction between particles and droplets increases due to electrostatic field *** the experimental investigations carried out,an electrostatic two-fluid nozzle was used to generate a charged spray mist according to the principle of charging by *** a chamber,dispersed dust was precipitated with the spray mist,while detecting the laser light *** means of comparative measurements it could be shown that faster sedimentation and separation takes place through electrostatic *** variations regarding the use of compressed air and water were investigated and the sedimentation time of the particle-droplet mixture in the chamber was shown.A size distribution was then calculated from the laser light attenuation,which shows that the proportion of small particles decreases with spray ***,the influence of the polarity of droplets and solid particles on the reduction measure was determined.

关键词： Dust separation Spray mist Electrostatic Dust chamber Laser light attenuation Charging by induction