Dependence on laser intensity and pulse duration in proton acceleration by irradiation of ultrashort laser pulses on a Cu foil target

Oishi, Yuji; Nayuki, Takuya; Fujii, Takashi; Takizawa, Y.; Wang, X.; Yamazaki, T.; Nemoto, Koshichi; Kayoiji, Tsutomu; Sekiya, Takao; Horioka, Kazuhiko; Okano, Yasuaki; Hironaka, Yoichiro; Nakamura, Kazutaka G.; Kondo, Ken‐ichi; Andreev, Alexander A.

doi:10.1063/1.1943436

Cited by 84 publications

(39 citation statements)

References 41 publications

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“…When fast electron energy ε eh and density n eh in the sheath at the target rear are known, longitudinal electric field can be calculated, and maximum energy of accelerated ions may be assessed [2,14] ε im = 2 Zε eh ln ω pi t ef…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Pic simulations of femtosecond interactions with mass-limited targets

et al. 2006

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Laser interactions with mass-limited targets are studied here via 2D3V relativistic electromagnetic particle-in-cell (PIC) simulations. We also describe our newly developed code that uses novel efficient algorithms. Damping regions have been implemented in order to eliminate spurious reflection of outgoing electromagnetic waves from boundaries of the simulation box. Mass-limited targets limit undesirable spread of absorbed laser energy out of the interaction zone. Mass-limited target, such as droplets, are shown to enhance the achievable fast ion energy significantly.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Pic simulations of femtosecond interactions with mass-limited targets

et al. 2006

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“…We use a Ti:sapphire laser system at The Central Research Institute of Electric Power Industry [18,19]. In this laser system, the central wavelength is 800 nm and the pulse duration is 50 fs [full width at half maximum (FWHM)].…”

Section: Methodsmentioning

confidence: 99%

Development of Laser-driven Proton Source Toward Its Applications

Sagisaka

Daido

Pirozhkov

et al. 2009

Journal of the Optical Society of Korea

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We observe the proton signals produced by laser interaction with thin-foil targets of polyimide and of copper. We change the thickness of the polyimide target to 7.5 μm, 12.5 μm, and 50 μm. High-energy protons with the maximum energy of ~2.3 MeV from 7.5 μm thick polyimide are observed. This proton beam with the maximum energy of multi-MeV has various applications such as a proton shadowgraphy.

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“…Parametric studies have been performed by others [15,18,48,[65][66][67]. Our analysis is limited to the three most important parameters related to energy absorption by the target: absorbed energy and its distribution among various degrees of freedom, deuteron mean energy and energy conversion efficiency.…”

Section: Variation Of the Peak Laser Intensity Laser Pulse Duration mentioning

confidence: 99%

Flexible Soldier and Machine Interface for Micro Air Vehicles

Costello¹,

Beyer²

2006

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Standard Form 298 (Rev. 8-98)Prescribed by ANSI Std. Z39.18Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 5d. PROJECT NUMBER 5e. TASK NUMBER 5f. WORK UNIT NUMBER The angular distribution of neutrons formed in nuclear fusion reactions of a high-energy deuteron beam with a deuterated polyethylene (CD2) was investigated with a Monte Carlo ion beam-target deposition model. The initial conditions were obtained from a two-dimensional particlein-cell laser-target deposition model. The neutron yield and its angular distribution were studied as a function of peak laser intensity, laser pulse duration and primary target thickness. The proposed scheme for neutron production delivers a typical neutron yield of 10E+5-10E+7 neutrons/ion and 10E+5-10E+7 neutrons/Joule laser energy. REPORT TYPE 1. REPORT DATE (DD-MM-YYYY) TITLE AND SUBTITLE AUTHOR(S) PERFORMING ORGANIZATION REPORT NUMBER PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S ACRONYM(S) 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR / MONITOR'S REPORT NUMBER(S)12 Laser-target deposition model.A two-dimensional fully relativistic electromagnetic particle-in-cell model (Ref.[1]) was developed. The particle-in-cell model describes the evolution of the target by moving "quasiparticles" representing each species (electrons and ions). The "quasi-particles" are driven by the laser electromagnetic field. To describe the latter, we solve the Maxwell's equations for propagation of electromagnetic wave (in the visible/near IR) through the plasma. The particle-incell model solves the relativistic equations of motion of the charged particles (ions and electrons) from which one can derive detailed information about the particle positions, velocity and energy.Coupling the two parts of the model turned out to be a major problem since the plasma density is very high. Particle-in-cell codes tend to produce "noisy" quantities, such as particle densities and currents. The numerical noise quickly amplifies and the solution is overwhelmed by artificial noise. Therefore, we developed a technique specifically designed to couple a particle-...

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Dependence on laser intensity and pulse duration in proton acceleration by irradiation of ultrashort laser pulses on a Cu foil target

Cited by 84 publications

References 41 publications

Pic simulations of femtosecond interactions with mass-limited targets

Pic simulations of femtosecond interactions with mass-limited targets

Development of Laser-driven Proton Source Toward Its Applications

Flexible Soldier and Machine Interface for Micro Air Vehicles

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