检索结果-南通市图书馆

fast efficient photon deceleration in plasmas by using two laser pulses at different frequencies

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第3期9卷 11-18页

作者： Y.x.Wang x.L.Zhu S.M.Weng P.li x.f.li H.Ai H.R.Pan Z.M.Sheng Key Laboratory for Laser Plasmas(moe) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghai 200240China Research Center of Laser fusion of China Academy of Engineering Physics MianyangSichuan 621900China State key Laboratory of High field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the mid-infrared(mid-IR)to terahertz(THz)range is of interest for applications in a number of fields,from fundamental research to biology and *** conventional laser technology,photon deceleration in plasma wakes provides an alternative approach to the generation of ultrashort mid-IR or THz ***,we present a photon deceleration scheme for the efficient generation of ultrashort mid-IR or THz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate time delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasma wake ***,the photon deceleration in the plasma wake becomes faster and more efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and THz spectral ranges.

关键词： laser ultrashort photon

Depolarization of intense laser beams by dynamic plasma density gratings

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2023年第3期11卷 48-56页

作者： Y.x.Wang S.M.Weng P.li Z.C.Shen x.Y.Jiang J.Huang x.L.Zhu H.H.Ma x.B.Zhang x.f.li Z.M.Sheng J.Zhang Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghaiChina Research Center of Laser fusion of China Academy of Engineering Physics MianyangChina College of Physics and Electronics Engineering Northwest Normal UniversityLanzhouChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

As a typical plasma-based optical element that can sustain ultra-high light intensity,plasma density gratings driven by intense laser pulses have been extensively studied for wide ***,we show that the plasma density grating driven by two intersecting driver laser pulses is not only nonuniform in space but also varies over ***,the probe laser pulse that passes through such a dynamic plasma density grating will be depolarized,that is,its polarization becomes spatially and temporally *** importantly,the laser depolarization may spontaneously take place for crossed laser beams if their polarization angles are arranged *** laser depolarization by a dynamic plasma density grating may find application in mitigating parametric instabilities in laser-driven inertial confinement fusion.

关键词： depolarization high-power laser plasma density grating

Molecular simulation of solubility and diffusion of water in polymer electrolyte membranes

在线全文

学校读者我要写书评

暂无评论

Molecular simulation of solubility and diffusion of water in...

GCMC study hydrogen adsorption on MOfs with Ab initio force field

第九届全国氢能学术会议

作者： x.f.li,Y.Shi,Q.Chen,f.li,H.Sun Shanghai Jiao Tong University,China

＜正＞The proton conductivity and the mechanical property of the polymer electrolyte membranes（PEMs） depend heavily on the equilibrium water content of the polymer systems. Molecular simulation method was used to investigate the equilibrium solubility and diffusion of water in hydrated Nafion-117 and sulfonated polyarylenethioether sulfone polymer

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

GCMC study hydrogen adsorption on MOFs with Ab initio force ...

Mitigating parametric instabilities in plasmas by sunlight-like lasers

第九届全国氢能学术会议

作者： J.fu,x.f.li,L.f.Zhao,H.Sun Shanghai Jiao Tong University,China

＜正＞MOfs are potential materials for hydrogen storage,but several key issues need to be solved before making this kind of materials *** order to help design new MOf materials, we developed an ab initio force *** thi...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2021年第5期6卷 54-61页

作者： H.H.Ma x.f.li S.M.Weng S.H.Yew S.Kawata P.Gibbon Z.M.Sheng J.Zhang Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghai 200240China Graduate School of Engineering Utsunomiya UniversityYohtoh 7-1-2Utsunomiya 321-8585Japan Institute for Advanced Simulation J¨ulich Supercomputing CentreForschungszentrum J¨ulich52425 J¨ulichGermany Centre for Mathematical Plasma Astrophysics Katholieke Universiteit Leuven3000 LeuvenBelgium SUPA Department of PhysicsUniversity of StrathclydeGlasgow G40NGUnited Kingdom Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

Sunlight-like lasers that have a continuous broad frequency spectrum,random phase spectrum,and random polarization are formulated *** a sunlight-like laser beam consisting of a sequence of temporal speckles,the resonant three-wave coupling that underlies parametric instabilities in laser–plasma interactions can be greatly degraded owing to the limited duration of each speckle and the frequency shift between two adjacent *** wave coupling can be further weakened by the random polarization of such *** simulations demonstrate that the intensity threshold of stimulated Raman scattering in homogeneous plasmas can be doubled by using a sunlight-like laser beam with a relative bandwidth of∼1%as compared with a monochromatic laser ***,the hot-electron generation harmful to inertial confinement fusion can be effectively controlled by using sunlight-like laser *** drivers may be realized in the next generation of broadband lasers by combining two or more broadband beams with independent phase spectra or by applying polarization smoothing to a single broadband beam.

关键词： polarization scattering speckle

Generation of polarized electron beams through self-injection in the interaction of a laser with a pre-polarized plasma

在线全文

学校读者我要写书评

暂无评论

High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.Yin x.f.li Y.J.Gu N.Cao Q.Kong M.Büscher S.M.Weng M.Chen Z.M.Sheng Key Laboratory of Nuclear Physics and Ion-beam Application(MoE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of High field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut für Laser-und Plasmaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron beam production via laser wakefield acceleration in pre-polarized plasma is investigated by particlein-cell *** evolution of the electron beam polarization is studied based on the Thomas±Bargmann±Michel±Telegdi equation for the transverse and longitudinal self-injection,and the depolarization process is found to be influenced by the injection *** the case of transverse self-injection,as found typically in the bubble regime,the spin precession of the accelerated electrons is mainly influenced by the ***,in the case of longitudinal injection in the quasi-1D regime(for example,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons move around the laser axis,the net influence of the laser field is nearly zero and the contribution of the wakefield can be ***,an ultra-short electron beam with polarization of 99%can be obtained using longitudinal self-injection.

关键词： laser wakefield acceleration longitudinal self-injection particle-in-cell simulation polarized electron beam

Transition from backward to sideward stimulated Raman scattering with broadband lasers in plasmas

在线全文

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2023年第6期8卷 63-73页

作者： x.f.li S.M.Weng P.Gibbon H.H.Ma S.H.Yew Z.liu Y.Zhao M.Chen Z.M.Sheng J.Zhang Key Laboratory for Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IfSA Shanghai Jiao Tong UniversityShanghai 200240China Institute for Advanced Simulation Jülich Supercomputing CentreForschungszentrum Jülich52425 JülichGermany Centre for Mathematical Plasma Astrophysics Katholieke Universiteit Leuven3000 LeuvenBelgium Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of Science Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518107China

Broadband lasers have been proposed as future drivers of inertial confined fusion(ICf)to enhance the laser-target coupling efficiency via the mitigation of various parametric *** physical mechanisms involved have been explored recently,but are not yet fully ***,stimulated Raman scattering(SRS)as one of the key parametric instabilities is investigated theoretically and numerically for a broadband laser propagating in homogeneous plasma in multidimensional *** linear SRS growth rate is derived as a function of scattering angles for two monochromatic laser beams with a fixed frequency differenceδω.Ifδω/ω_(0)∼1%,withω0 the laser frequency,these two laser beams may be decoupled in stimulating backward SRS while remaining coupled for sideward SRS at the laser intensities typical for ***,side-scattering may dominate over backward SRS for two-color laser *** finding of SRS transition from backward to sideward SRS is then generalized for a broadband laser with a few-percent ***-in-cell simulations demonstrate that with increasing laser bandwidth,the sideward SRS gradually becomes dominant over the backward *** sideward SRS is very efficient in producing harmful hot electrons,attention needs to be paid on this effect if ultra-broadband lasers are considered as next-generation ICf drivers.

关键词： scattering backward Transition

The design and performance of charged particle detector onboard the GECAM mission

在线全文

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2022年第1期6卷 53-62页

作者： Y.B.xu x.Q.li x.L.Sun S.Yang H.Wang W.x.Peng x.H.liang K.Gong Y.Q.liu D.Y.Guo x.Y.Zhao C.Y.li Z.H.An J.J.He x.J.liu x.Y.Wen S.L.xiong fan Zhang D.L.Zhang C.Y.Zhang C.Cai Z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.J.Hou Y.G.li G.li L.li x.f.li M.S.li f.J.Lu H.Lu B.Meng f.Shi J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao Y.P.xu J.W.Yang Q.B.Yi S.N.Zhang C.M.Zhang f.Zhang Y.Zhao x.Zhou Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Background The Gravitational wave highly energetic Electromagnetic Counterpart All-sky Monitor(GECAM)is dedicated to detecting gravitational wave gamma-ray *** is capable of all-sky monitoring over and discovering gamma-ray bursts and new radiation *** consists of two microsatellites,each equipped with 8 charged particle detectors(CPDs)and 25 gamma-ray detectors(GRDs).Purpose The CPD is used to measure charged particles in the space environment,monitor energy and flow intensity changes,and identify between gamma-ray bursts and space charged particle events in conjunction with *** CPD uses plastic scintillator as the sensitive material for detection,silicon photomultiplier array as the optically readable device,and the inlaid Am-241 radioactive source as the onboard calibration *** In this paper,we will present the working principle,physical design,functional implementation and preliminary performance test results of the *** a result,the energy range of electron,gamma-ray detection efficiency and dead time are tested to be better than the indexes required through the ground calibration experiment.

关键词： GECAM CPD SiPM

Dedicated SiPM array for GRD of GECAM

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Radiation Detection Technology and Methods 2022年第1期6卷 63-69页

作者： D.L.Zhang x.L.Sun Z.H.An x.Q.li x.Y.Wen K.Gong C.Cai Z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.Y.Guo J.J.He D.J.Hou Y.G.li C.Y.li G.li L.li x.f.li M.S.li x.H.liang x.J.liu Y.Q.liu f.J.Lu H.Lu B.Meng W.x.Peng f.Shi H.Wang J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao S.L.xiong Y.B.xu Y.P.xu S.Yang1 x.Zhou J.W.Yang fan Zhang S.N.Zhang C.Y.Zhang C.M.Zhang fei Zhang x.Y.Zhao Institute of High Energy Physics CASBeijing 100049China State Key Laboratory of Particle Detection and Electronics Beijing 100049China

Purpose The discovery of gravitational waves and gamma-ray bursts heralds the era of multi-messenger *** the adoption of two small satellites to achieve the all-sky monitoring of gamma-ray bursts,the gravitational wave highenergy electromagnetic counterpart all-sky monitor(GECAM)possesses a quasi-real-time early warning ability and plays an important role in positioning the sources of gravitational waves and in subsequent *** satellite of GECAM was fitted with 253-inch-diameter gamma-ray detectors(GRD),covering an energy range of 8–2 *** have adopted silicon photomultiplier tubes(SiPM)in lieu of photomultiplier tubes(PMT)to adapt to the dimensional limitations of *** A unique 3-inch circular SiPM array was *** this design,646×6 mm chips were arranged evenly in a circular manner with the seams filled with reflecting films,thus achieving satisfactory uniformity of light *** integrated pre-amplifier circuit on the back of the SiPM array adopted two-level grouping and summing;further,it achieved a satisfactory signal-to-noise *** high-gain and low-gain channels were adopted to achieve a large dynamic range,and two independent power supply units were used,where each unit can be closed separately,thus improving *** Performance studies show that this SiPM array meets the requirements of *** A 3-inch SiPM array have been developed that uses grouped summation,reflective films,a circular arrangement,two groups of independent power supplies,high-and low-gain signals,differential signal output technologies,*** solution can be used not only for GECAM,but also as a general solution for SiPM-based scintillation detectors.

关键词： SiPM GECAM Gamma-ray Signal-to-noise ratio Reflecting film Pre-amplifier