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Fabrication,microstructures,and optical properties of Yb:Lu_(2)O_(3) laser ceramics from co-precipitated nano-powders

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Journal of Advanced Ceramics 2020年第6期9卷 674-682页

作者： Ziyu LIU Guido TOCI Angela PIRRI Barbara PATRIZI Yagang FEnG Jiabei WEI Feng WU Zhaoxiang YAnG Matteo VAnnInI Jiang LI Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China istituto nazionale di Ottica Consiglio Nazionale delle RicercheCNR-INOSesto Fiorentino(Fi)50019Italy istituto di fisica applicata“n.carrara” Consiglio Nazionale delle RicercheCNR-IFACSesto Fiorentino(Fi)50019Italy School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013China

The Yb:Lu_(2)O_(3)precursor made up of spherical particles was synthesized through the co-precipitation method in the water/ethanol *** 5 at% Yb:Lu_(2)O_(3)powder is in the cubic phase after calcination at 1100℃ for 4 *** powder also consists of spherical nanoparticles with the average particle and grain sizes of 96 and 49 nm,*** average grain size of the pre-sintered ceramic sample is 526 nm and that of the sample by hot isostatic pressing grows to 612 *** 1.0 mm-thick sample has an in-line transmittance of 81.6%(theoretical value of 82.2%)at 1100 *** largest absorption cross-section at 976 nm is 0.96×1^(0-20)cm^(2) with the emission cross-section at 1033 nm of 0.92×10^(-20)cm^(2) and the gain cross sections are calculated with the smallest population inversion parameter β of *** highest slope efficiency of 68.7% with the optical efficiency of 65.1% is obtained at 1033.3 nm in quasi-continuous wave(QCW)*** the case of continuous wave(CW)pumping,the highest slope efficiency is 61.0% with the optical efficiency of 54.1%.The obtained laser performance indicates that Yb:Lu_(2)O_(3)ceramics have excellent resistance to thermal load stresses,which shows great potential in high-power solid-state laser applications.

关键词： Yb:Lu_(2)O_(3)transparent ceramics co-precipitated nano-powder spectroscopic properties laser performance hot isostatic pressing

The HEPD particle detector of the CSES satellite mission for investigating seismo-associated perturbations of the Van Allen belts

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Science China(Technological Sciences) 2018年第5期61卷 643-652页

作者： AMBROSI Giovanni BARTOCCI Simona BASARA Laurent BATTISTOn Roberto BURGER William J. CARFORA Luca CASTELLInI Guido CIPOLLOnE Piero COnTI Livio COnTIn Andrea DE DOnATO Cinzia DE SAnTIS Cristian FOLLEGA Francesco M. GUAnDALInI Cristina IOnICA Maria IUPPA Roberto LAUREnTI Giuliano LAZZIZZERA Ignazio LOLLI Mauro MAnEA Christian MARCELLI Laura MASCIAnTOnIO Giuseppe MERGE Matteo OSTERIA Giuseppe PACInI Lorenzo PALMA Francesco PALMOnARI Federico PAnICO Beatrice PATRIZII Laura PERFETTO Francesco PICOZZA Piergiorgio POZZATO Michele PUEL Matteo RASHEVSKAYA Irina RICCI Ester RICCI Marco RICCIARInI Sergio Bruno SCOTTI Valentina SOTGIU Alessando SPARVOLI Roberta SPATARO Bruno VITALE Vincenzo istituto nazionale di fisica nucleare (InFn) Sezione di Perugia Perugia 06123 Italy Uninettuno University Rome 00186 Italy istituto nazionale di fisica nucleare (InFn) Sezione di Roma Tor Vergata Rome 00133 Italy istituto nazionale di fisica nucleare (InFn) TIFPA Povo (TN) 38123 Italy dipartimento di fisica Universita di Trento Povo (TN) 38123 Italy dipartimento di fisica Universita di Roma Tor Vergata Rome 00133 Italy IFAC-CnR Sesto Fiorentino (FI) 50019 Italy dipartimento di fisica e Astronomia Universita di Bologna Bologna 40127 Italy istituto nazionale di fisica nucleare (InFn) Sezione di Bologna Bologna 40127 Italy istituto nazionale di fisica nucleare (InFn) Sezione di Napoli Naples 80126 Italy istituto nazionale di fisica nucleare (InFn) LNE Frascati (RM) 00044 Italy Agenzia Spaziale Italiana (ASI) SSDC Rome 00133 Italy

CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CnSA(Chinese national Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2^(nd), 2018 from the Jiuquan Satellite Launch Center(China).

关键词： earthquake seismic-precursors particle detector Van Allen belts magnetosphere ionosphere space weather cosmic rays

Cosmology with Two Compactification Scales

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Chinese Physics Letters 2000年第4期17卷 310-312页

作者： A.G.Agnese M.La Camera dipartimento di fisica delPUniversita di Genova Istituto Nazionale di Fisica NucleareSezione di Genova Via Dodecaneso 3316146 GenovaItaly

We consider a(4+d)-dimensional spacetime broken up into a(4-n)-dimensional Minkowski spacetime(where n goes from 1 to 3)and a compact(n+d)-dimensional *** the present time the n compactification radii are of the order... 详细信息

关键词： manifold. length. Minkowski

Updating the orbital ephemeris of the dipping source XB 1254–690 and the distance to the source

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Research in Astronomy and Astrophysics 2017年第10期17卷 97-108页

作者： Angelo F.Gambino Rosario Iaria Tiziana di Salvo Marco Matranga Luciano Burderi Fabio Pintore Alessandro Riggio Andrea Sanna Universita degli Studi di Palermo Dipartimento di Fisica e Chimica Universita degli Studi di Cagliari Dipartimento di Fisica InAF-istituto di Astrofisica Spaziale e fisica Cosmica - Milano

XB 1254-690 is a dipping low mass X-ray binary system hosting a neutron star and showing type I X-ray bursts. We aim at obtaining a more accurate orbital ephemeris and at constraining the orbital period derivative of the system for the first time. In addition, we want to better constrain the distance to the source in order to locate the system in a well defined evolutive scenario. We apply, for the first time, an orbital timing technique to XB 1254-690, using the arrival times of the dips present in the light curves that have been collected during 26 yr of X-ray pointed observations acquired from different space missions. We estimate the dip arrival times using a statistical method that weights the count-rate inside the dip with respect to the level of persistent emission outside the dip. We fit the obtained delays as a function of the orbital cycles both with a linear and a quadratic function. We infer the orbital ephemeris of XB 1254-690, improving the accuracy of the orbital period with respect to previous estimates. We infer a mass of M2 = 0.42 ± 0.04 M for the donor star, in agreement with estimations already present in literature, assuming that the star is in thermal equilibrium while it transfers part of its mass via the inner Lagrangian point, and assuming a neutron star mass of 1.4 Mo. Using these assumptions, we also constrain the distance to the source, finding a value of 7.6±0.8 kpc. Finally, we discuss the evolution of the system, suggesting that it is compatible with a conservative mass transfer driven by magnetic braking.

关键词： stars: neutron -- stars: individual (XB 1254-690) -- X-rays: binaries -- X-rays: stars --Astrometry and celestial mechanics: ephemerides

The Space and Time Features of Global SST Anomalies Studied by Complex Principal Component Analysis

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Advances in Atmospheric Sciences 1999年第1期16卷 3-23,5+9+11+15+17+19+21页

作者：骆美霞 dipartimento di fisica Generale Universita di Torino Turin Italy and Istituto di Cosmogeofisica del CNR Turin Italy

In this paper, the variability characteristics of the global field of sea surface temperature (SST) anomaly are studied by complex principal component (c.p.c.) analysis, whose results are also compared with those of real p.c. analysis. The data consist of 40 years of global SST monthly averages over latitudes from 42 5°S to 67 5°n. In the spatial domain, it is found that the distribution of the first complex loading amplitude is characterized by three areas of large values: the first one in the eastern and central equatorial Pacific Ocean, the second one in the northern tropical Indian Ocean and South China Sea, the third one in the northern Pacific Ocean. As it will be explained, this pattern may be considered as representative of El nio mode. The first complex loading phase pattern shows a stationary wave in the Pacific (also revealed by real p.c. analysis) superimposed to an oscillating disturbance, propagating from the Pacific to Indian or the opposite way. A subsequent correlation analysis among different spatial points allows revealing disturbances actually propagating westward from the Pacific to the Indian Ocean, which could therefore represent reflected Rossby waves, i.e. the west phase of the signals that propagate disturbances of thermal structure in the tropical Pacific Ocean. In the time domain, a relation between the trend of the first complex principal component and the EnSO cycle is also established.

关键词： Global sea surface temperature anomalies EnSO Complex principal component analysis Travelling disturbances

Energy spectrum of cosmic protons and helium nuclei by a hybrid measurement at 4300 m a.s.l.

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Chinese Physics C 2014年第4期38卷 25-31页

作者： B.Bartoli P.Bernardini 毕效军 I.Bolognino P.Branchini A.Budano A.K.Calabrese Melcarne P.Camarri 曹臻 R.Cardarelli S.Catalanotti 陈松战陈天禄 P.Creti 崔树旺戴木忠 A.D'Amone 单增罗布 I.De Mitri B.D'Ettorre Piazzoli T.di Girolamo G.di Sciascio 冯存峰冯朝阳冯振勇苟全补郭义庆何会海胡海兵胡红波 M.Iacovacci R.Iuppa 贾焕玉拉巴次仁厉海金 G.Liguori 刘成刘俊刘茂元卢红马玲玲马欣华 G.Mancarella S.M.Mari G.Marsella D.Martello S.Mastroianni P.Montini C.C.ning M.Panareo B.Panico L.Perrone P.Pistilli F.Ruggieri P.Salvini R.Santonico S.n.Sbano 沈培若盛向东石峰 A.Surdo 谭有恒 P.Vallania S.Vernetto C.Vigorito 王辉吴超勇吴含荣薛良杨群羽杨先楚姚志国袁爱芳查敏张慧敏张力张学尧张勇赵静扎西次仁扎西桑珠周勋秀祝凤荣朱清棋 G.Zizzi 白云翔陈明君陈垚冯少辉高博顾旻皓侯超李晓晓刘佳刘加丽王旭肖刚张丙开张寿山周斌左雄 dipartimento di fisica dell’Università di napoli "Federico II" Complesso Universitario di Monte Sant’Angelovia Cinthia istituto nazionale di fisica nucleare Sezione di Napoli Complesso Universitario di Monte Sant’Angelovia Cinthia dipartimento di Matematica e fisica "Ennio De Giorgi" Università del Salento via per Arnesano istituto nazionale di fisica nucleare Sezione di Lecce via per Arnesano Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences dipartimento di fisica dell’Università di Pavia via Bassi 627100 Pavia Italy istituto nazionale di fisica nucleare Sezione di Pavia via Bassi 627100 Pavia Italy istituto nazionale di fisica nucleare Sezione di Roma Tre via della Vasca Navale 8400146 Roma Italy istituto nazionale di fisica nucleare-CnAF Viale Berti-Pichat 6/240127 Bologna Italy dipartimento di fisica dell’Università di Roma "Tor Vergata" via della Ricerca Scientifica istituto nazionale di fisica nucleare Sezione di Roma Tor Vergata via della Ricerca Scientifica Tibet University Hebei normal University Yunnan University Shandong University Southwest Jiaotong University dipartimento di fisica dell’Università "Roma Tre" via della Vasca Navale 8400146 Roma Italy Osservatorio Astrofisico di Torino dell’istituto nazionale di Astrofisica via P.Giuria 110125 Torino Italy istituto nazionale di fisica nucleare Sezione di Torino via P.Giuria 110125 Torino Italy dipartimento di fisica dell’Università di Torino via P.Giuria 110125 Torino Italy Physics Department Kunming University normal College of Fuyang

The energy spectrum of cosmic Hydrogen and Helium nuclei has been measured below the so-called ＂knee＂ by using a hybrid experiment with a wide field-of-view Cherenkov telescope and the Resistive Plate Chamber （RPC） array of the ARGO-YBJ experiment at 4300 m above sea level. The Hydrogen and Helium nuclei have been well separated from other cosmic ray components by using a multi-parameter technique. A highly uniform energy resolution of about 25% is achieved throughout the whole energy range （100-700 TeV）. The observed energy spectrum is compatible with a single power law with index γ=-2.63±0.06.

关键词： Cherenkov telescope ARGO-YBJ energy spectrum hybrid measurement composition

Pesticide Residue Control in the Years 1986-1987

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Biomedical and Environmental Sciences 1991年第4期4卷 415-422页

作者： IVAnO CAMOnI ALFOnSO di MUCCIO MARIA SAnDRA BELLISAI PAOLO CITTI istituto Superiore di Sanita' Lab. Tossicologia applicata Viale Regina Elena 299 Rome 00161ItalyIstituto Superiore di Sanita' Lab. Tossicologia Applicata Viale Regina Elena 299 Rome 00161ItalyMinistero Della Sanita Dir. Gen. Ig. Alim. e Nutrizione Rome 00161 ItalyIstituto Superiore di Sanita' Lab. Tossicologia Applicata Viale Regina Elena 299 Rome 00161Italy

Results of analytical surveys on pesticide residue levels in foods for the years 1986-1987 are presented. Analytical data obtained from regional laboratories are tabulated in terms of various commodity groups (vegetables, fruit, cereals, processed or derived foodstuffs, other commodities, legumes, environmental samples, others) and are compared with maximum legal tolerances established by the ministerial ordinance (Italian Ministry of Health) 6.6. 1985.On a total number of 4715 determinations of classes of compounds or of single compounds made on 1601 commodities samples, only n 53 (1.1 %) violative results appeared. no residue was found at levels exceeding regulatory limits or found in commodities where a tolerance had not been established for a specific pesticide/commodity combination.

关键词： Pesticide Residue Control in the Years 1986-1987

PHYSICAL MODEL FOR THE EnGInEERInG AnALYSISOF THE THERMOELASTICLTY OF SOLID BOdiES

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Chinese Journal of Mechanical Engineering 2000年第3期13卷 165-170,177页

作者： Lucia Umberto I.n.F.M.-istituto nazionale per la fisica della Materia Nucl 意大利 Rivalta Sc I-15047

The thermal behaviour of the solids under elastic deformations is analysed in order to obtain a model which combines the molecular dynamics results with the global thermal behaviour of the solids under elastic transformations. The result obtained consists of the introduction of the thermal behaviour in the Parrinello-Rahman model, obtaining the thermal molecular dynamic model useful in the analysis of the thermoelastic behaviour of solids.

关键词： PHYSICAL MODEL FOR THE EnGInEERInG AnALYSISOF THE THERMOELASTICLTY OF SOLID BOdiES

The enhanced X-ray Timing and Polarimetry mission—eXTP

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Science China(Physics,Mechanics & Astronomy) 2019年第2期62卷 3-27页

作者： Shuangnan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas norbert Meidinger Aline Meuris Kirpal nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio di Cosimo Sebastian diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang dianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang nian Yu WenDa Zhang Gianluigi Zampa nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Key Laboratory for Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences Institut für Astronomie und Astrophysik Eberhard Karls Universität InAF-istituto di Astrofisica e Planetologia Spaziali InFn-Roma Tor Vergata Via della Ricerca Scientifica 1 Department of Engineering Physics and Center for Astrophysics Tsinghua University DTU Building 327DK-2800 Kongens Institute of Space Sciences 08193 Cerdanyola del Valles Institut d’Estudis Espacials de Catalunya Sezione di Pisa Istituto Nazionale di Fisica NucleareLargo Bruno Pontecorvo3 Department of Astronomy University of Genevachemin d’Ecogia 16 Osservatorio di Astrofisica e Scienza Dello Spazio di Bologna Istituto Nazionale di Astofisica Astronomical Institute Czech Academy of Sciences Max Planck Institute for Extraterrestrial Physics Giessenbachstr.1 CEA Paris-Saclay/IRFU Beijing Institute of Spacecraft System Engineering CAST Osservatorio Astronomico di Brera Istituto Nazionale di Astofisica Space Research Center Polish Academy of Sciences Key Laboratory of Advanced Material Microstructure of Education Ministry of China Institute of Precision Optical EngineeringSchool of Physics Science and EngineeringTongji University Department of Physics and Center for Astrophysics Tsinghua University Universita’degli Studi di Udine Via delle Scienze 206 Mullard Space Science Laboratory University College London Department of nuclear and Particle Physics University of Geneva SROn netherlands Institute for Space Research Politecnico di Milano Sezione di Perugia Istituto Nazionale di Fisica Nucleare dipartimento di fisica e Chimica Fondazione Bruno Kessler Dr.Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics Universität Erlangen-Nürnberg University of Pavia Department of ElectronicsInformation and Biomedical Engineering and INFN Pavia Sezione di Torino Istituto Nazionale di Fisica NucleareVia Pietro Giuria1 Department of Physics and Astronomy University of Leicester Sezione di Trieste Istituto Nazionale di Fisica Nucleare

In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave *** paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.

关键词： X-ray instrumentation X-ray polarimetry X-ray timing space mission:eXTP