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EUV ablation of organic polymers at a high fluence

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High Power Laser Science and Engineering 2014年第3期2卷 86-90页

作者： Chiara Liberatore Klaus Mann Matthias Mller Ladislav Pina Libor juha jorge j.rocca Akira Endo Tomas Mocek Hi LASE Centre Institute of Physics ASCRv.v.i.Za Radnicí 82525241 Dolní BezanyCzech Republic Czech Technical University Thkurova 2077/7160 00 Prague 6Czech Republic Laser Laboratorium Gttingen (LLG) 37077 GttingenGermany Department of Electrical and Computer Engineering Colorado State UniversityFort CollinsCO 80523USA

A preliminary investigation on short-wavelength ablation mechanisms of poly(methyl methacrylate)(PMMA) and poly(1,4-phenylene ether ether-sulfone)(PPEES) by extreme ultraviolet(EUV) radiation at 13.5 nm using a table-top laserproduced plasma from a gas-puff target at LLG(Gttingen) and at 46.9 nm by a 10 Hz desktop capillary discharge laser operated at the Institute of Physics(Prague) is *** of polymer materials is initiated by photoinduced polymer chain *** ablation occurs due to the formation of volatile products by the EUV radiolysis removed as an ablation plume from the irradiated material into the *** general,cross-linking of polymer molecules can compete with the chain *** processes may influence the efficiency and quality of micro(nano)structuring in polymer *** is a critical parameter to be taken into account when an EUV ablation process occurs,because different wavelengths result in different energy densities in the near-surface region of the polymer exposed to nanosecond pulses of intense EUV radiation.

关键词： EUV ablation organic polymer photo-erosion mechanisms wavelength effect

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用量热器测量泵浦离子激光器的电子枪效率

应用激光 1984年第2期 67-68页

作者：郁曾期 j.rocca G.Collins 复旦大学物理系美国科罗拉多州立大学

本文介绍了用量热器测量一种新型电子枪产生电子束的效率的方法。实验结果用来估计这种电子束泵浦的连续离子激光器的效率。

关键词：量热器电子枪离子激光器泵浦抽运

Petawatt and exawatt class lasers worldwide

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High Power Laser Science and Engineering 2019年第3期7卷 168-221页

作者： Colin N.Danson Constantin Haefner jake Bromage Thomas Butcher jean-Christophe FChanteloup Enam A.Chowdhury Almantas Galvanauskas Leonida A.Gizzi joachim Hein David I.Hillier Nicholas W.Hopps Yoshiaki Kato Efim A.Khazanov Ryosuke Kodama Georg Korn Ruxin Li Yutong Li jens Limpert jingui Ma Chang Hee Nam David Neely Dimitrios Papadopoulos Rory R.Penman Liejia Qian jorge j.rocca andrey A.Shaykin Craig W.Siders Christopher Spindloe Sándor Szatmári Raoul M.G.M.Trines jianqiang Zhu Ping Zhu jonathan D.Zuegel AWE AldermastonReadingUK OxCHEDS Clarendon LaboratoryDepartment of PhysicsUniversity of OxfordOxfordUK CIFS Blackett LaboratoryImperial CollegeLondonUK NIF&Photon Science Directorate Lawrence Livermore National LaboratoryLivermoreUSA Fraunhofer Institute for Laser Technology(ILT) AachenGermany Chair for Laser Technology LLT RWTH Aachen UniversityAachenGermany University of Rochester Laboratory for Laser EnergeticsRochesterUSA Central Laser Facility STFC Rutherford Appleton LaboratoryChiltonDidcotUK LULI CNRSCEASorbonne UniversitesEcole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance Department of Physics The Ohio State UniversityColumbusUSA Centre for Ultrafast Optical Science University of MichiganAnn ArborUSA Intense Laser Irradiation Laboratory Istituto Nazionale di Ottica(INO)CNRPisaItaly Institute of Optics and Quantum Electronics Friedrich-Schiller-University Jena and Helmholtz InstituteJenaGermany The Graduate School for the Creation of New Photonics Industries NishikuHamamatsuJapan Institute of Applied Physics Russian Academy of SciencesNizhny NovgorodRussia Institute of Laser Engineering Osaka UniversitySuitaOsakaJapan ELI-Beamlines Institute of PhysicsCzech Academy of SciencesPragueCzech Republic State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Institute for Applied Physics(IAP)at Friedrich-Schiller-University jena JenaGermany Helmholtz Institute jena JenaGermany Fraunhofer Institute for Applied Optics and Precision Engineering(IOF) JenaGermany Key Laboratory for Laser Plasma(Ministry of Education) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Centre for Relativistic Laser Science(CoReLS) Institute for Basic ScienceDepartment of Physics and Photon ScienceGwangju Institute of Science and Techno

In the 2015 review paper‘Petawatt Class Lasers Worldwide’a comprehensive overview of the current status of highpower facilities of>200 TW was *** was largely based on facility specifications,with some description of their uses,for instance in fundamental ultra-high-intensity interactions,secondary source generation,and inertial confinement fusion(ICF).With the 2018 Nobel Prize in Physics being awarded to Professors Donna Strickland and Gerard Mourou for the development of the technique of chirped pulse amplification(CPA),which made these lasers possible,we celebrate by providing a comprehensive update of the current status of ultra-high-power lasers and demonstrate how the technology has *** are now in the era of multi-petawatt facilities coming online,with 100 PW lasers being proposed and even under *** addition to this there is a pull towards development of industrial and multi-disciplinary applications,which demands much higher repetition rates,delivering high-average powers with higher efficiencies and the use of alternative wavelengths:mid-IR *** apart from a comprehensive update of the current global status,we want to look at what technologies are to be deployed to get to these new regimes,and some of the critical issues facing their development.

关键词： exawatt lasers high-power lasers petawatt lasers ultra-high intensity

Deuterated polyethylene nanowire arrays for high-energy density physics

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High Power Laser Science and Engineering 2021年第2期9卷 262-268页

作者： M.G.Capeluto A.Curtis C.Calvi R.Hollinger V.N.Shlyaptsev j.j.rocca electrical and computer engineering department colorado state universityfort collinsco 80523usa departamento de física universidad de buenos aires-ifiba1428 buenos airesargentina physics department colorado state universityfort collinsco 80523usa

The interaction of intense,ultrashort laser pulses with ordered nanostructure arrays offers a path to the efficient creation of ultra-high-energy density(UHED)matter and the generation of high-energy particles with compact *** of deuterated nanowires arrays results in a near-solid density environment with extremely high temperatures and large electromagnetic fields in which deuterons are accelerated to multi-megaelectronvolt energies,resulting in deuterium–deuterium(D–D)*** we focus on the method of fabrication and the characteristics of ordered arrays of deuterated polyethylene *** irradiation of these array targets with femtosecond pulses of relativistic intensity and joule-level energy creates a micro-scale fusion environment that produced 2×10^(6)neutrons per joule,an increase of about 500 times with respect to flat solid CD2 targets irradiated with the same laser *** with 8 j laser pulses was measured to generate up to 1.2×10^(7)D–D fusion neutrons per shot.

关键词： deuterated nanowires arrays fusion neutrons ultra-high-energy density plasmas

Scattering and absorption imaging of a highly fractured fluid-filled seismogenetic volume in a region of slow deformation

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Geoscience Frontiers 2020年第3期11卷 989-998页

作者： Ferdinando Napolitano Luca De Siena Anna Gervasi Ignazio Guerra Roberto Scarpa Mario La rocca Dipartimento di Fisica“E.R.Caianiello” Universita Degli Studi di SalernoVia Giovanni Paolo IIFiscianoSA84084Italy Institute of Geosciences Johannes Gutenberg University MainzJ.-J.-Becher-Weg 21MainzD-55128Germany University of Aberdeen School of GeosciencesGeology and Petroleum GeologyMeston BuildingKing’s CollegeAberdeenScotlandAB243UEUK Dipartimento di Biologia Ecologia e Scienze Della TerraUniversit a Della CalabriaPonte P.BucciArcavacata di RendeCS87036Italy Istituto Nazionale di Geofisica e Vulcanologia Sezione di Rende(CS)Ponte P.BucciArcavacata di RendeCS87036Italy

Regions of slow strain often produce swarm-like sequences,characterized by the lack of a clear mainshockaftershock *** comprehension of their underlying physical mechanisms is challenging and still *** used seismic recordings from the last Pollino swarm(2010-2014) and nearby to separate and map seismic scattering(from P peak-delays) and absorption(from late-time coda-wave attenuation) at different frequencies in the Pollino range and ***-scattering and high-absorption anomalies are markers of a fluid-filled fracture volume extending from SE to NW(1.5-6 Hz) across the *** increasing frequency,these anomalies approximately cover the area where the strongest earthquakes occurred from the sixteenth century until *** our interpretation,the NW fracture propagation ends where carbonates of the Lucanian Apennines begin,as marked by a high-scattering and low-absorption *** the highest frequency(12 Hz) the anomalies widen southward in the middle of the range,consistently marking the faults active during the recent Pollino *** results suggest that fracture healing has closed small-scale fractures across the SE faults that were active in the past centuries,and that the propagation of fluids may have played a crucial role in triggering the 2010-2014 Pollino *** that the fluid propagation ended at the carbonates barrier in the NW direction,fractures opened new paths to the South,favoring the nucleation of the last Pollino ***,the recently active faults in the middle of the seismogenic volume are marked by a high-scattering and highabsorption *** work provides evidence that attenuation parameters may track shape and dynamics of fluid-filled fracture networks in fault areas.

关键词： Polling Seismic attenuation Scattering Fluids Fractures Healing

Cold adaptation does not alter ATP homeostasis during cold exposure in Drosophila melanogaster

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Integrative Zoology 2018年第4期13卷 471-481页

作者： Caroline M.WILLIAMS james R.rocca Arthur S.EDISON David B.ALLISON Theodore j.MORGAN Daniel A.HAHN Department of Integrative Biology University of CaliforniaBerkeleyCaliforniaUSA Departments of Entomology and Nematology University of FloridaGainesvilleFloridaUSA Biochemistry University of FloridaGainesvilleFloridaUSA Advanced Magnetic Resonance Imaging and Spectroscopy Facility McKnight Brain InstituteUniversity of FloridaGainesvilleFloridaUSA Departments of Genetics and Biochemistry Complex Carbohydrate Research CenterUniversity of GeorgiaAthensGeorgiaUSA Department of Epidemiology and Biostatistics School of Public HealthIndiana University BloomingtonBloomingtonIndianaUSA Division of Biology Kansas State UniversityManhattanKansasUSA

In insects and other ectotherms,cold temperatures cause a coma resulting from loss of neuromuscular function,during which ionic and metabolic homeostasis are progressively *** adaptation improves homeostasis during cold exposure,but the ultimate targets of selection are still an open *** acclimation and adaptation remodels mitochondrial metabolism in insects,suggesting that aerobic energy production during cold exposure could be a target of ***,we test the hypothesis that cold adaptation improves the ability to maintain rates of aerobic energy production during cold exposure by using^(31)P NMR on live *** lines of Drosophila melanogaster artificially selected for fast and slow recovery from a cold coma,we show that cold exposure does not lower ATP levels and that cold adaptation does not alter aerobic ATP production during cold ***-hardy and cold-susceptible lines both experienced a brief transition to anaerobic metabolism during cooling,but this was rapidly reversed during cold exposure,suggesting that oxidative phosphorylation was sufficient to meet energy demands below the critical thermal minimum,even in cold-susceptible *** thus reject the hypothesis that performance under mild low temperatures is set by aerobic ATP supply limitations in ***,excluding oxygen and capacity limitation as a weak link in energy *** work suggests that the modulations to mitochondrial metabolism resulting from cold acclimation or adaptation may arise from selection on a biosynthetic product(s)of those pathways rather than selection on ATP supply during cold exposure.

关键词： chill coma energetics insect oxygen limitation thermal tolerance

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连续离子激光器的电子束泵浦

光学学报 1984年第2期4卷 135-138页

作者：郁曾期,j.j.rocca ,j.D.Meyer ,G.j.Fetzer ,G.j.Collins 复旦大学物理系美国科罗拉多州立大学电机系美国科罗拉多州立大学工程研究中心

本文描述一种新型的电子束泵浦离子激光器结构以及它所用的辉光放电电子枪。至今,已经在七条离子谱线上获得连续激光。文中讨论了激光的结果。

关键词：激光输出功率离子激光器电子枪激活介质电子束泵浦增益介质电子能量分布辉光放电

Interesting QFT Problems Tackled in New Fashion

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journal of High Energy Physics, Gravitation and Cosmology 2020年第4期6卷 590-608页

作者： A. Plastino M. C. rocca Departamento de Fí sica Universidad Nacional de La Plata La Plata Argentine IFLP-Consejo Nacional de Investigaciones Cientì ficas y Tecnoló gicas (IFLP-CCT-CONICET)-C. C. La Plata Argentina SThAR-EPFL Lausanne Switzerland Departamento de Matem′atica Universidad Nacional de La Plata La Plata Argentine

The Dimensional Regularization technique of Bollini and Giambiagi (BG) [Phys. Lett. B 40, 566 (1972);Il Nuovo Cim. B 12, 20 (1972);Phys. Rev. D 53, 5761 (1996)] cannot be employed for all Schwartz Tempered Distributions Explicitly Lorentz Invariant (STDELI) S′L. We lifted such limitation in [j. Phys. Comm. 2 115029 (2018)], which opens new QFT possibilities, centering in the use of STDELI that allows one to obtain a product in a ring with zero divisors. This in turn, overcomes all problems regrading QFT infinities. We provide here three examples of the application of our STDELI-extension to quantum field theory (A) the exact evaluation of an electron’s self energy to one loop, (B) the exact evaluation of QED’s vacuum polarization, and C) the theory for six dimensions, that is non-renormalizable.

关键词： Dimensional Regularization Generalization Electron Self Energy Vacuum Polarization Six-Dimensional Non Renormalizable λ(∅4/4!) Theory

Approximate Reformulation a Recent Non-Renormalizable QFT’s Methodology and Einstein’s Gravity

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journal of High Energy Physics, Gravitation and Cosmology 2020年第2期6卷 298-311页

作者： A. Plastino M. C. rocca Departamento de Fisica Universidad Nacional de La Plata Argentina Consejo Nacional de Investigaciones Científicas y Tecnológicas (IFLP-CCT-CONICET)-C. C. 727 La Plata Argentina SThAR-EPFL Lausanne Switzerland Departamento de Matemática Universidad Nacional de La Plata Argentina

We revisit, advancing a useful approximation, a recently formulated QFT treatment that successfully overcomes any troubles with infinities for non-renormalizable QFTs [j. Phys. Comm. 2 115029 (2018)]. Such methodology was able to successfully deal, in non-relativistic fashion, with Newton’s gravitation potential [Annals of Physics 412, 168013 (2020)]. Our present approximation to the QFT method of [j. Phys. Comm. 2 115029 (2018)] is based on the Einstein’s Lagrangian (EG) elaborated by Gupta [1], save for a different constraint’s selection. This choice allows one to avoid the lack of unitarity for the S matrix that impaired the proceedings of Gupta and Feynman. Moreover, we are able to simplify the handling of such constraint by eliminating the need to involve ghosts for guarantying unitarity. Our approximation consists in setting the graviton field ∅μν=γμν∅, where γμνis a constant tensor and ∅a scalar (graviton) field. The ensuing approximate approach is non-renormalizable, an inconvenience that we are able to overcome in [j. Phys. Comm. 2 115029 (2018)].

关键词： Quantum Field Theory Einstein Gravity Non-Renormalizable Theories Unitarity