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Solutions of the 1D Coupled Nonlinear Schrodinger Equations by the CIP-BS Method

Communications in Computational Physics 2006年第2期1卷 261-275页

作者： Takayuki Utsumi Takayuki Aoki james koga Mitsuru Yamagiwa Department of Electronics and Computer Science Tokyo University of ScienceYamaguchi1-1 Daigaku-doriSanyou-OnodaYamaguchi 756-0884Japan Global Scientific Information and Computing Center Tokyo Institute of TechnologyO-okayamaMeguro-kuTokyo 152-8552Japan Japan Atomic Energy Agency 8-1 Umemidai Kizu-choSouraku-gunKyoto 619-0215Japan

In this paper,we present solutions for the one-dimensional coupled nonlinear Schrödinger(CNLS)equations by the Constrained Interpolation Profile-Basis Set(CIP-BS)*** method uses a simple polynomial basis set,by which physical quantities are approximated with their values and derivatives associated with grid *** operations on functions are carried out in the framework of differential ***,by introducing scalar products and requiring the residue to be orthogonal to the basis,the linear and nonlinear partial differential equations are reduced to ordinary differential equations for values and spatial *** method gives stable,less diffusive,and accurate results for the CNLS equations.

关键词： The CIP-BS method basis set differential algebra the Galerkin method the coupled nonlinear Schrödinger equation

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Probing and possible application of the QED vacuum with micro-bubble implosions induced by ultra-intense laser pulses

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Matter and Radiation at Extremes 2019年第3期4卷 18-24页

作者： james K.koga Masakatsu Murakami Alexey V.Arefiev Yoshihide Nakamiya Kansai Photon Science Institute National Institutes for Quantum and Radiological Science and TechnologyKizugawaKyoto 619-0215Japan Institute of Laser Engineering Osaka UniversityOsaka 565-0871Japan Department of Mechanical and Aerospace Engineering University of California at San DiegoLa JollaCalifornia 92093USA Extreme Light Infrastructure-Nuclear Physics(ELI-NP)/Horia Hulubei National Institute forR&Din PhysicsandNuclear Engineering(IFIN-HH) 30 Reactorului St.P.O.Box MG-6Bucharest-MagureleJudet¸ul Ilfov RO-077125Romania

The interaction of micro-bubbles with ultra-intense laser pulses has been shown to generate ultra-high proton densities and correspondingly high electric *** the possibility of using such a combination to study the fundamental physical phenomenon of vacuum *** current or near-future laser systems,measurement of vacuum polarization via the bending of gamma rays that pass near imploded microbubbles may be *** it is independent of photon energy to within the leading-order solution of the Heisenberg–Euler Lagrangian and the geometric optics approximation,the corresponding index of refraction can dominate the indices of refraction due to other effects at sufficiently high photon *** consider the possibility of its application to a transient gamma-ray lens.

关键词： laser polarization vacuum

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Enhanced ion acceleration from transparency-driven foils demonstrated at two ultraintense laser facilities

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Light(Science & Applications) 2023年第4期12卷 593-604页

作者： Nicholas P.Dover Tim Ziegler Stefan Assenbaum Constantin Bernert Stefan Bock Florian-Emanuel Brack Thomas E.Cowan Emma J.Ditter Marco Garten Lennart Gaus Ilja Goethel George S.Hicks Hiromitsu Kiriyama Thomas Kluge james K.koga Akira Kon Kotaro Kondo Stephan Kraft Florian Kroll Hazel F.Lowe Josefine Metzkes-Ng Tatsuhiko Miyatake Zulfikar Najmudin Thomas Püschel Martin Rehwald Marvin Reimold Hironao Sakaki Hans-Peter Schlenvoigt Keiichiro Shiokawa Marvin E.P.Umlandt Ulrich Schramm Karl Zeil Mamiko Nishiuchi Kansai Photon Science Institute National Institutes for Quantum Science and Technology8-1-7 UmemidaiKizugawaKyoto 619-0215Japan The John Adams Institute for Accelerator Science Blackett LaboratoryImperial College LondonLondon SW72AZUnited Kingdom Helmholtz-Zentrum Dresden-Rossendorf 01328 DresdenGermany Technische Universitat Dresden 01069 DresdenGermany Interdiscipllinary Graduate School of Engineering Sciences Kyushu University6-1Kasuga-KoenKasugaFukuoka 816-8580Japan

Laser-driven ion sources are a rapidly developing technology producing high energy,high peak current *** suitability for applications,such as compact medical accelerators,motivates development of robust acceleration schemes using widely available repetitive ultraintense femtosecond *** applications not only require high beam energy,but also place demanding requirements on the source stability and *** can be seriously affected by the laser temporal contrast,precluding the replication of ion acceleration performance on independent laser systems with otherwise similar ***,we present the experimental generation of>60 MeV protons and>30 MeV u-1 carbon ions from sub-micrometre thickness Formvar foils irradiated with laser intensities>1021 *** are accelerated by an extreme localised space charge field≥30TVm-1,over a million times higher than used in conventional *** field is formed by a rapid expulsion of electrons from the target bulk due to relativistically induced transparency,in which relativistic corrections to the refractive index enables laser transmission through normally opaque *** replicate the mechanism on two different laser facilities and show that the optimum target thickness decreases with improved laser contrast due to reduced *** demonstration that energetic ions can be accelerated by this mechanism at different contrast levels relaxes laser requirements and indicates interaction parameters for realising application-specific beam delivery.

关键词： acceleration intense transparency

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Does time taken to achieve jaundice-clearance influence survival of the native liver in post-Kasai biliary atresia?

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World Journal of Pediatrics 2018年第2期14卷 191-196页

作者： Hideaki Nakajima Hiroyuki koga Manabu Okawada Hiroki Nakamura Geoffrey james Lane Atsuyuki Yamataka Department of Pediatric General and Urogenital Surgery Juntendo University School of MedicineTokyo 113-8421Japan

Background We reviewed the time taken for post-portoenterostomy(PE)biliary atresia(BA)patients to obtain jaundice-clearance(total bilirubin≤1.2 mg/dL;JC)post-PE to determine if JC time(JCT)is prognostic for survival of the native liver(SNL).Methods The subjects were 66 BA patients treated with PE at our institute between 1989,the year when liver transplan-tation(LTx)became available in Japan,and *** was used to create three groups(≤30 days:n=14;31-60 days:n=31;≥61 days:n=21).Medical records were reviewed retrospectively to evaluate:age at onset of symptoms,duration of symptoms pre-PE,age and weight at PE,serum liver function tests,incidence of cholangitis,and micro-bile duct size at *** Age at onset of symptoms,age and weight at PE,duration of symptoms pre-PE,and micro-bile duct size were similar for all patients in all three *** and SNL appeared to correlate because preoperative total bilirubin(7.1,9.6,10.2 mg/dL;P<0.05)was significantly lower in the JCT≤30 days group(P<0.05)while there was a significant decrease in SNL(P<0.03)and a significant increase in LTx(P<0.01)in the JCT≥61 days *** LTx subjects who achieved JC were found to have developed cholangitis within 3 months of *** During the follow-up of post-PE subjects,longer JCT and cholangitis occurrence within 3 months of PE would appear to be negative prognostic factors for SNL while preoperative total bilirubin would appear to be a positive prognostic factor for SNL.

关键词： Biliary atresia Jaundice free Liver transplantation Native liver survival Portoenterostomy

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