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Insensitivity of a turbulent laser-plasma dynamo to initial conditions

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matter and radiation at Extremes 2022年第4期7卷 50-64页

作者： A.f.A.Bott L.chen P.Tzef.r.c.s.c.A.J.Palmer A.r.Bell r.Bingham A.Birkel d.H.froula J.Katz m.W.Kunz c.-K.Li H-s.Park r.Petrasso J.s.ross B.reville d.ryu f.H.séguin T.G.White A.A.schekochihin d.Q.Lamb G.Gregori department of Physics University of OxfordOxfordUnited Kingdom department of Astrophysical sciences University of PrincetonPrincetonNew Jersey 08544USA department of Physics and Astronomy University of RochesterRochesterNew York 14627USA Laboratory for Laser Energetics University of RochesterRochesterNew York 14623USA school of mathematics and Physics Queens University BelfastBelfastUnited Kingdom rutherford Appleton Laboratory ChiltonDidcotUnited Kingdom department of Physics University of StrathclydeGlasgowUnited Kingdom massachusetts Institute of Technology CambridgeMassachusetts 02139USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA max-Planck-Institut für Kernphysik HeidelbergGermany department of Physics School of Natural SciencesUNISTUlsanSouth Korea department of Physics University of NevadaRenoNevada 89557USA department of Astronomy and Astrophysics University of ChicagoChicagoIllinois 60637USA

It has recently been demonstrated experimentally that a turbulent plasma created by the collision of two inhomogeneous,asymmetric,weakly magnetized,laser-produced plasma jets can generate strong stochastic magnetic fields via the small-scale turbulent dynamo mechanism,provided the magnetic reynolds number of the plasma is sufficiently *** this paper,we compare such a plasma with one arising from two pre-magnetized plasma jets whose creation is identical save for the addition of a strong external magnetic field imposed by a pulsed magnetic field *** investigate the differences between the two turbulent systems using a Thomson-scattering diagnostic,x-ray selfemission imaging,and proton *** Thomson-scattering spectra and x-ray images suggest that the external magnetic field has a limited effect on the plasma dynamics in the *** the external magnetic field induces collimation of the flows in the colliding plasma jets and although the initial strengths of the magnetic fields arising from the interaction between the colliding jets are significantly larger as a result of the external field,the energies and morphologies of the stochastic magnetic fields post-amplification are *** conclude that,for turbulent laser-plasmas with supercritical magnetic reynolds numbers,the dynamo-amplified magnetic fields are determined by the turbulent dynamics rather than the seed fields or m.d.st changes in the initial flow dynamics of the plasma,a finding consistent with theoretical expectations and simulations of turbulent dynamos.

关键词： turbulent initial stochastic

High repetition rate exploration of the Biermann battery effect in laser produced plasmas over large spatial regions

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High Power Laser science and Engineering 2022年第2期10卷 42-51页

作者： J.J.Pilgram m.B.P.Adams c.G.constantin P.V.Heuer s.Ghazaryan m.Kaloyan r.s.dorst d.B.schaeffer P.Tzef.r.c.s.c.Niemann department of Physics and Astronomy University of CaliforniaLos AngelesLos AngelesCA 90095USA department of Physics and Astronomy University of RochesterRochesterNY 14627USA Laboratory for Laser Energetics University of Rochester RochesterNY 14623USA department of Astrophysical sciences Princeton UniversiryPrincetonNJ 08540USA

In this paper we present a high repetition rate experimental platform for examining the spatial structure and evolution of Biermann-generated magnetic fields in laser-produced *** have extended the work of prior experiments,which spanned over millimeter scales,by spatially measuring magnetic fields in multiple planes on centimeter scales over thousands of laser *** with magnetic fiux probes show azimuthally symmetric magnetic fields that range from 60 G at 0.7 cm from the target to 7 G at 4.2 cm from the *** expansion rate of the magnetic fields and evolution of current density structures are also mapped and *** temperature and density of the laser-produced plasma are measured with optical Thomson scattering and used to directly calculate a magnetic reynolds number of 1.4×10^(4),confirming that magnetic advection is dominant at≥1.5 cm from the target *** results are compared to fLAsH simulations,which show qualitative agreement with the data.

关键词： Biermann battery high repetition rate laser-produced plasma

Issues and Opportunities in Exotic Hadrons

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chinese Physics c 2016年第4期40卷 8-21页

作者： r.A.Briceno T.d.cohen s.coito J.J.dudek E.Eichten c.s.fischer m.fritsch W.Gradl A.Jackura m.Kornicer G.Krein r.f.Lebed f.A.machado r.E.mitchell c.J.morningstar m.Peardon m.r.Pennington K.Peters J.m.richard c.P.shen m.r.shepherd T.skwarnicki E.s.swanson A.P.szczepaniak c.Z.Yuan Thomas Jefferson National Accelerator facility 12000 Jefferson Avenue Newport News VA 23606 USA department of Physics Old Dominion University Norfolk VA 23529 USA maryland center for fundamental Physics University of Maryland College Park MD USA Institute of m.d.rn Physics CAS Lanzhou 730000 China Theoretical Physics department Fermilab IL 60510 USA Institut fut Theoretische Physik Justus-Liebig-Universitat Gieben Heinrich-Buff-Ring 16 D-35392 GieBen Germany Helmholtz Institute mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Johannes Gutenberg University of mainz Johann-Joachim-Becher-Weg 45 D-55099 Mainz Germany Physics department Indiana University Bloomington IN 47405 USA University of Hawaii Honolulu Hawaii 96822 USA Instituto de física Teorica Universidade Estadual Paulista Rua Dr. Bento Teobaldo Ferraz 271 - Bloco II 01140-070 Sgo Paulo SP Brazil department of Physics Arizona State University Tempe Arizona 85287-1504 USA department of Physics and Astronomy University of Pittsburgh Pittsburgh PA 15260 USA Indiana University Bloomington Indiana 47405 USA department of Physics Carnegie Mellon University Pittsburgh PA 15213 USA school of mathematics Trinity College Dublin 2 Ireland GsI Helmholtzcentre for Heavy Ion research GmbH D-64291 Darmstadt Germany Universite de Lyon Institut de Physique Nucleaire de Lyon IN2P3-CNRS-UCBL 4 rue Enrico Fermi Villeurbanne France Beihang University Beijing 100191 China syracuse University Syracuse NY USA Theory center Thomas Jefferson National Accelerator Facility 12000 Jefferson Avenue Newport News VA 23606 USA center for Exploration of Energy and matter Indiana University Bloomington IN 47403 USA Institute of High Energy Physics Beijing 100049 China

The last few years have been witness to a proliferation of new results concerning heavy exotic ***, many new signals have been discovered that could be pointing towards the existence of tetraquarks,pentaquarks, and other exotic configurations of quarks and gluons. Theoretically, advances in lattice field theory techniques place us at the cusp of understanding complex coupled-channel phenomena, m.d.lling grows more sophisticated, and effective field theories are being applied to an ever greater range of situations. It is thus an opportune time to evaluate the status of the field. In the following, a series of high priority experimental and theoretical issues concerning heavy exotic hadrons is presented.

关键词： quark meson exotic flavor pointing charm Belle sophisticated hadron situations

The acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

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matter and radiation at Extremes 2024年第1期9卷 15-24页

作者： constantin Aniculaesei Thanh Ha samuel Yoffe Lance Labun stephen milton Edward mccary michael m.spinks Hernan J.Quevedo Ou Z.Labun ritwik sain Andrea Hannasch rafal Zgadzaj Isabella Pagano Jose A.franco-Altamirano martin L.ringuette Erhart Gaul scott V.Luedtke Ganesh Tiwari Bernhard Ersfeld Enrico Brunetti Hartmut ruhl Todd ditmire sandra Bruce michael E.donovan michael c.downer dino A.Jaroszynski Bjorn manuel Hegelich University of Texas at Austin AustinTexas 78712USA sUPA department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA Los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pc,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge

dc Plasma Technology Applied to Powder metallurgy: an Overview

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Plasma science and Technology 2013年第1期15卷 70-81页

作者： A. N. KLEIN r. P. cArdOsO H. c. PAVANATI c. BINdEr A. m. mALIsKA G. HAmmEs d. fUsAO A. sEEBEr s. f. BrUNATTO J. L. r. mUZArT Labmat (materials Laboratory) Departamento de Engenharia Mec~nica Universidade Federal de Santa Catarina (UFSC) 88040-900 FlorianSpolis - SC Brazil departamento de Engenharia mecanica Universidade Federal do Parana (UFPR) 81531-990 Curitiba- PR Brazil departamento Academico de metal-mecanica Instituto Federal de Santa Catarina (IFSC) 88020-300 Florianopolis - SC Brazil Universidade Tecnologica federal do Parana (UTfPr) 84016-210 Ponta Grossa - PR Brazil centro de ciencia e Tecnologia Universidade de Caxias do Sul 95070-560 Caxias do Sul- RS Brazil

dc plasma is a very promising technology for processing different materials, and is becoming especially interesting when low environmental impact and high-performance treatments are needed. some of the intrinsic characteristics of dc plasma technology, which make it suitable for powder metallurgy （Pm） and powder injection molding （PIm） parts production, are low- pressure processing and plasma environment high reactivity. moreover it can be considered as a highly competitive green technology. In this work, an overview of some of the important dc plasma techniques applied to Pm and PIm parts processing is presented. Emphasis is given to the descriptions of the main characteristics and the technique potentials of plasma-assisted nitriding, plasma-assisted thermal debinding, plasma-assisted sintering, and simultaneously plasma-assisted sintering and surface alloying. The aspects presented and discussed in this paper indicate that dc plasma processes are promising and competitive techniques for Pm and PIm parts processing.

关键词： powder metallurgy dc glow discharge plasma nitriding plasma sintering,plasma-assisted thermal debinding surface alloying

r&d of back-end electronics for improved resistive plate chambers for the phase 2 upgrade of the cms end-capmuon system

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radiation detection Technology and methods 2022年第3期6卷 306-316页

作者： H.Kou Z.-A.Liu J.Zhao J.song Q.Hou W.diao P.cao W.Gong N.Wang A.samalan m.Tytgat m.El sawy G.A.Alves f.marujo E.A.coelho f.Torres da silva de Araujo E.m.d. costa H.Nogima A.santoro s.fonseca de souza d.de Jesus damiao m.Thiel m.Barroso ferreira filho K.mota Amarilo A.Aleksandrov r.Hadjiiska P.Iaydjiev m.rodozov m.shopova G.sultanov A.dimitrov L.Litov B.Pavlov P.Petkov A.Petrov E.shumka s.J.Qian c.Avila d.Barbosa A.cabrera A.florez J.fraga J.reyes Y.Assran m.A.mahmoud Y.mohamm.d.I.Laktineh G.Grenier m.Gouzevitch L.mirabito K.shchablo c.combaret W.Tromeur G.Galbit A.Luciol X.chen I.Bagaturia I.Lom.d.e Z.Tsamalaidze V.Amoozegar B.Boghrati m.Ebraimi E.Zareian m.mohamm.d. Najafabadi m.Abbrescia G.Iaselli G.Pugliese f.Loddo N.de filippis r.Aly d.ramos W.Elmetenawee s.Leszki I.margjeka d.Paesani L.Benussi s.Bianco d.Piccolo s.meola s.Buontempo f.carnevali L.Lista P.Paolucci f.fienga A.Braghieri P.salvini P.montagna c.riccardi P.Vitulo E.Asilar J.choi T.J.Kim s.Y.choi B.Hong K.s.Lee H.Y.Oh J.Goh I.Yu c.Uribe Estrada I.Pedraza H.castilla-Valdez r.L.fernandez A.sanchez-Hernandez E.Vazquez m.ramirez-Garcia N.Zaganidis A.radi H.Hoorani s.muhamm.d.A.Ahm.d.I.Asghar m.A.shah W.A.Khan J.Eysermans I.crotty on behalf of the cms muon Group department of Physics and Astronomy Ghent UniversityProeftuinstraat 869000 GhentBelgium UniversitéLibre de Bruxelles Avenue Franklin Roosevelt50-1050 BruxellesBelgium centro Brasileiro Pesquisas fisicas R.Dr.Xavier Sigaud150UrcaRio de JaneiroRio de Janeiro 22290-180Brazil department de fisica Nuclear e Altas Energias Instituto de FisicaUniversidade do Estado do Rio de JaneiroRua Sao Francisco Xavier524Rio de JaneiroRio de Janeiro 20559-900Brazil Bulgarian Academy of sciences Institute for Nuclear Researches and Nuclear EnergyTzarigradsko Shaussee Boulevard 721784 SofiaBulgaria faculty of Physics University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria school of Physics Peking UniversityBeijing 100871China state Key Laboratory of Particle detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese Academy of sciences B325Main BuildingNo.19(A)Yuquan RoadShijingshan DistrictBeijing 100049China Universidad de Los Andes Carrera 1No.18A-12BogotáColombia Egyptian Network for High Energy Physics Academy of Scientific Research and Technology101 Kasr El-Einy St.CairoEgypt suez University SuezCairo RoadElsalam CitySuez 43522Egypt center for High Energy Physics(cHEP-fU) Faculty of ScienceFayoum UniversityEl-Fayoum 63514Egypt Univ Lyon Univ Claude Bernard Lyon 1CNRS/IN2P3IP2I LyonUMR 582269622 VilleurbanneFrance Georgian Technical University 77 Kostava Str.0175 TbilisiGeorgia school of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5531 TehranIran school of Engineering Damghan UniversityDamghan ***Iran INfN Sezione di BariVia Orabona 470126 BariItaly INfN Laboratori Nazionali di Frascati(LNF)Via Enrico Fermi 4000044 FrascatiItaly INfN Sezione di NapoliComplesso University Monte S.AngeloVia Cintia80126 NapoliItaly dipartimento di Ingegneria Elettrica e delle Tecnologie dell’Informazione UniversitàDegli Studi di Napoli Federico II80126 NapoliI

Purpose The Large Hadron collider(LHc)at European Organization for Nuclear research is planned to be upgraded to the high luminosity *** the luminosity makes muon triggering reliable and ofﬂine reconstruction very *** enhance the redundancy of the compact muon solenoid(cms)muon system and resolve the ambiguity of track reconstruction in the forward region,an improved resistive Plate chamber(irPc)with excellent time resolution will be installed in the Phase-2 cms *** irPc will be equipped with front-End Electronics(fEE),which can perform high-precision time measurements of signals from both ends of the *** Back-End Electronics(BEE)need to be researched and developed to provide sophisticated functionalities such as interacting with fEE with shared links for fast,slow control(sc)and data,in addition to trigger primitives(TPs)generation and data acquisition(dAQ).method The BEE prototype uses a homem.d. hardware board compatible with the mTcA standard,the back-end board(BEB).BEE interacts with fEE via a bidirectional 4.8 Gbps optical paired-link that integrates clock,data,and control *** clock and fast/slow control commands are distributed from BEB to the fEE via the *** uplink is used for BEB to receive the time information of the irPc’sﬁred strips and the responses to the fast/slow control *** have a pipelined detector data for clusterﬁnding operation,recover(demux)the time relationship of which is changed due to the transmission protocol for the continuous incoming mUXed data from *** at each bunch crossing(BX),clusteringﬁred strips that satisfy time and spatial constraints to generate *** incoming raw mUXed detector data and TPs in a time window and latency based on the trigger signal are read out to the dAQ *** Ethernet(GbE)of siTcP and commercial 10-GbE are used as link standards for sc and dAQ,respectively,for the BEB to interact with the *** The joint test results of

关键词： cms irPc BEE TP dAQ sc

A portable X-pinch design for x-ray diagnostics of warm.d.nse matter

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matter and radiation at Extremes 2022年第1期7卷 53-63页

作者： J.strucka J.W.d.Halliday T.Gheorghiu H.Horton B.Krawczyk P.moloney s.Parker G.rowland N.schwartz s.stanislaus s.Theocharous c.Wilson Z.Zhao T.A.shelkovenko s.A.Pikuz s.N.Bland Plasma Physics Group Imperial College LondonLondon SW72BWUnited Kingdom University of cambridge CambridgeUnited Kingdom department of Nuclear Plasmaand Radiological EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaIllinois 61801USA Lebedev Physical Institute Russian Academy of SciencesMoscow 119991Russia

We describe the design and x-ray emission properties(temporal,spatial,and spectral)of dry Pinch I,a portable X-pinch driver developed at Imperial college *** Pinch I is a direct capacitor discharge device,30033003700 mm3 in size and∼50 kg in mass,that can be used as an external driver for x-ray diagnostics in high-energy-density physics *** key findings,the device is shown to reliably produce 1.1±0.3 ns long x-ray bursts that couple∼50 mJ of energy into photon energies from 1 to 10 *** average shot-to-shot jitter of these bursts is found to be 10±4.6 ns using a combination of x-ray and current *** spatial extent of the x-ray hot spot from which the radiation emanates agrees with previously published results for X-pinches-suggesting a spot size of 10±6μm in the soft energy region(1–10 keV)and 190±100μm in the hard energy region(>10 keV).These characteristics mean that dry Pinch I is ideally suited for use as a probe in experiments driven in the laboratory or at external facilities when more conventional sources of probing radiation are not *** the same time,this is also the first detailed investigation of an X-pinch operating reliably at current rise rates of less than 1 kA/ns.

关键词： energy diagnostics pinch

Geochemical evidences of trace metal anomalies for finding hydrocarbon microseepage in the petroliferous regions of the Tatipaka and Pasarlapudi areas of Krishna Godavari Basin,India

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Petroleum.sc.ence 2013年第1期10卷 19-29页

作者： rasheed m A Lakshmi m rao P L s Kalpana m s dayal A m Patil d J microbiology Laboratory Petroleum Geochemistry Group National Geophysical Research Institute (Council of Scientific and Industrial Research)

The long-term seepage of hydrocarbons, either as macroseepage or microseepage, can set up near-surface oxidation reduction zones that favor the development of a diverse array of chemical and mineralogical changes. The bacterial oxidation of light hydrocarbons can directly or indirectly bring about significant changes in the values of pH and Eh of the surrounding environment, thereby also changing the stability fields of the different mineral species present in that environment. The paper reports the role of hydrocarbon microseepage in surface alterations of trace metal concentrations. In this study trace metal alterations were mapped that appear to be associated with hydrocarbon microseepages in the oil/ gas fields. A total of 50 soil samples were collected near oil and gas fields of the Tatipaka and Pasarlapudi areas of the Krishna Godavari Basin, Andhra Pradesh. The soil samples were collected from a depth of 2-2.5 m. The paper reports the chemical alterations associated with trace metals in soils that are related to hydrocarbon microseepages above some of the major oil and gas fields of this petroliferous region. Trace metals, such as scandium （sc）, vanadium （V）, chromium （cr）, cobalt （co）, nickel （Ni）, copper （cu）, zinc （Zn）, barium （Ba） and strontium （sr）, in soil samples were analyzed using inductively coupled plasma- mass spectrometry （IcP-ms）. The concentrations of sc （8 to 40 mg/kg）, V （197 to 489 mg/kg）, cr （106 to 287 mg/kg）, co （31 to 52 mg/kg）, Ni （65 to 110 mg/kg）, cu （88 to 131 mg/kg）, Zn （88 to 471 mg/kg）, Ba （263 to 3,091 mg/kg） and sr （119 to 218 mg/kg） were obtained. It was observed that the concentrations of trace elements were tremendously increased when they were compared with their normal concentrations in soils. The analysis of adsorbed soil gas showed the presence of high concentrations of Yc2＋（c2H6, c3H8 and n-c4H10） ranging from 7 to 222 μg/kg respectively. Integrated studies of trace elements over adsorbed light gaseous hydrocarbons （2c2

关键词： Hydrocarbons microseepage trace metal alterations adsorbed soil gas Krishna Godavari Basin

Analysis of a stagnation Point flow with Hybrid Nanoparticles over a Porous m.d.um

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fluid dynamics & materials Processing 2023年第2期19卷 541-567页

作者： U.s.mahabaleshwar T.Anusha m.Hatami department of mathematics Davangere UniversityShivagangothriDavangereIndia department of mechanical Engineering Ferdowsi University of MashhadMashhadIran

The unsteady stagnation-point flow of a hybrid nanofluid over a stretching/shrinking sheet embedded in a porous m.d.um with mass transpiration and chemical reactions is *** momentum and mass transfer problems are combined to form a system of partial differential equations,which is converted into a set of ordinary differential equations via similarity *** ordinary differential equations are solved analytically to obtain the solution for velocity and concentration profiles in exponential and hypergeometric forms,*** concentration profile is obtained for four different cases namely constant wall concentration,uniform mass flux,general power law wall con-centration and general power law mass *** effect of different physical parameters such as darcy number da^(1-1),mass transpiration parameter V_(c),stretching/shrinking parameter (d),chemical reaction parameter(β)and schm.d. number (sc)on velocity and concentration profile is *** show that,the axial velocity will decreases as the shrinking sheet parameter increases,regardless of whether the suction or injection case is *** concentration decreases with an increase in the shrinking sheet parameter and the chemical reaction rate parameter.

关键词： chemical reaction parameter mass transpiration hybrid nanofluid porous m.d.um schm.d. number