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AN ASYMPTOTIC SOLUTION OF THE NONLINEAR REDUCED wAVE EQUATION

Acta Mathematica Scientia 2001年第2期21卷 275-281页

作者： kin-chung ng technical carreer institute, 320 w.31st street, new york, ny 10001, usa technical carreer institute 320 W.31st Street New York NY 10001 USA

This paper uses the boundary layer theory to obtain an asymptotic solution of the nonlinear educed wave equation. This solution is valid in the secular region where the geometrical optics result fails. However it agrees with the geometrical optics result when the field is away from the secular region. By using this solution the self-focusing length can also be obtained.

关键词： Nonlinear reduced wave equation asymptotic solution boundary layer theory

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Sorption of inorganic nanoparticles in woven cellulose fabrics

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Particuology 2009年第2期7卷 121-128页

作者： Dan H. Marsh D. Jason Riley David york Andrew Graydon School of Chemistry University of NottinghamUniversity ParkNottinghamNG7 the School of Chemistry University of BristolCantocks CloseBristolBS8 1TSUK.2RDUK Department of Materials Imperial College LondonExhibition RoadLondonSW7 2AZUK the School of Chemistry University of BristolCantocks CloseBristolBS8 1TSUK. Procter & Gamble technical Centres Ltd. Newcastle Upon TyneNE12 9TSUK

Titanium dioxide was deposited from aqueous suspension onto cellulosic surfaces. Titania was sourced from Degussa （P25TM, 70：30 anatase：rutile）. Dry uptake of particles was shown to be rapid and dominant with one-third of the deposition occurring in less than 30 s and over one-half in the first minute. Isotherms were recorded to compare the rate of titanium deposition on dry and pre-wetted cotton. In the dry case uptake reached a maximum in 30 min whereas in the pre-wetted case the uptake was seen to continue beyond 180 min. A broad trend of higher deposition occurring at lower pH was seen, corresponding to the region where surface charges were opposite and thus attractive. Dry pickup was less significant at high pH. The response to varying ionic strength was complex and was attributed to the combined effect of charge screening, particle aggregation and consequent particle entrapment or occlusion. Titania deposition into the interstices of woven cotton sheets resulted in the formation of inorganic, nanoparticulate skeletons which could be isolated by controlled combustion of the cellulose and thus cotton was suggested to have potential for the templated synthesis of high surface area semiconductor materials.

关键词： Titania Cellulose Sorption Zeta potential Templated material

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Laser produced electromagnetic pulses: generation, detection and mitigation

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High Power Laser Science and Engineering 2020年第2期8卷 88-146页

作者： Fabrizio Consoli Vladimir TTikhonchuk Matthieu Bardon Philip Bradford David CCarroll Jakub Cikhardt Mattia Cipriani Robert JClarke Thomas ECowan Colin NDanson Riccardo De Angelis Massimo De Marco Jean-Luc Dubois Bertr Etchessahar Alejro Laso Garcia David IHillier Ales Honsa weiman Jiang Viliam Kmetik Josef Krása Yutong Li FredériéLubrano Paul McKenna Josefine Metzkes-ng Alexre Poyé Irene Prencipe Piotr Ra¸czka Rol ASmith Roman Vrana Nigel Cwoolsey Egle Zemaityte Yihang Zhang Zhe Zhang Bernhard Zielbauer David Neely ENEA Fusion and Technologies for Nuclear Safety DepartmentC.R.Frascati00044 FrascatiItaly CELIA University of BordeauxCNRSCEA33405 TalenceFrance ELI Beamlines Institute of PhysicsCzech Academy of Sciences25241 Dolni BrezanyCzech Republic CEA DAMCESTA33116 Le BarpFrance Department of Physics York Plasma InstituteUniversity of YorkHeslingtonYork YO105DDUK Central Laser Facility Rutherford Appleton LaboratorySTFCUKRIChiltonDidcotOxfordshire OX110QXUK Czech technical University in Prague Faculty of Electrical Engineering16627 Prague 6Czech Republic institute of Plasma Physics of the Czech Academy of Sciences Za Slovankou 318200 PragueCzech Republic Helmholtz-Zentrum Dresden-Rossendorf Institut fur Strahlenphysik01328 DresdenGermany AwE plc AldermastonReadingBerkshire RG74PRUK OxCHEDS Clarendon LaboratoryDepartment of PhysicsUniversity of OxfordOxford OX13PUUK CIFS The Blackett LaboratoryImperial College LondonLondon SW72AZUK Centro de Laseres Pulsados(CLPU) 37185 VillamayorSalamancaSpain Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China institute of Physics of the Czech Academy of Sciences Na Slovance 218221 PragueCzech Republic School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Physics Scottish Universities Physics Alliance(SUPA)University of StrathclydeGlasgow G40NGUK Laboratory PIIM University Aix-Marseille-CNRS13397 MarseilleFrance institute of Plasma Physics and Laser Microfusion 01-497 WarsawPoland The Blackett Laboratory Imperial College LondonLondon SW72AZUK PHELIX Group GSI Helmholtzzentrum fur SchwerionenforschungD-64291 DarmstadtGermany

This paper provides an up-to-date review of the problems related to the generation,detection and mitigation of strong electromagnetic pulses created in the interaction of high-power,high-energy laser pulses with different types of solid *** includes new experimental data obtained independently at several international *** mechanisms of electromagnetic field generation are analyzed and considered as a function of the intensity and the spectral range of emissions they *** major emphasis is put on the GHz frequency domain,which is the most damaging for electronics and may have important *** physics of electromagnetic emissions in other spectral domains,in particular THz and MHz,is also *** theoretical models and numerical simulations are compared with the results of experimental measurements,with special attention to the methodology of measurements and complementary *** the underlying physical processes is the basis for developing techniques to mitigate the electromagnetic threat and to harness electromagnetic emissions,which may have promising applications.

关键词： electromagnetic pulses high-power lasers diagnostics mitigation techniques

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