Ion beam bunching via phase rotation in cascading laser-driven ion acceleration

Wang, H. C.; Weng, Shangkun; Liu, M.; Chen, Min; He, Miaohong; Zhao, Qian; Murakami, M.; Sheng, Zheng-Ming

doi:10.1063/1.5051522

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…Recent numerical simulations and supporting experimental measurements of laser accelerated ions relevant to FI by known enhanced TNSA, BOA, and RPA mechanisms indicate that besides the primary accelerated proton beam, the secondary heavier ion species with different charge states like C (1-6)+ , O (1-8)+ , and Al (11)(12)(13))+ ions of the foil material are also emitted simultaneously alongside the primary proton beam. [17][18][19] It was characterized by the lower intensity ion beam, representing almost the same beam profile but a higher energy of ∼ 10 MeV/nucleon. One of the important factors in improving the FI efficiency is the local energy deposition of the ignition beam in a short time period of ps.…”

Section: Introductionmentioning

confidence: 99%

On the evaluation of ignition threshold in proton‐carbon hybrid ignitor beam proposal

Mehrangiz

Khoshbinfar

2019

Contributions to Plasma Physics

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We may improve plasma ignition quality in a conically guided proton fast ignition scheme by the application of an extra lower intensity, secondary carbon beam. According to the experimental measurements on the number of laser-accelerated ions, the temporal evolution of the hot spot electron, ion, and radiation temperatures was examined using three-temperature plasma model, in radiation pressure acceleration (RPA) mechanisms for a proton-Carbon beam configuration, E avg ≈ 10 MeV/nucleon. The hot spot ignition was evaluated by the well-known stopping power models proposed independently by Li-Petrasso (LP) and Brown-Preston-Singleton (BPS). Based on our analytical results, with time, plasma temperature in the LP model surpasses the BPS model. From this point of view, to compensate this deficiency in the BPS method, we will show that the density ratio of 17% is required when the energy spread is 10%. The results were also validated by the DEIRA-4 code. Moreover, the electron-ion equilibrium will decrease up to 9.3 and 4.4% for the LP and BPS methods, respectively. It is demonstrated that the key features of a higher average ion energy as well as the narrow beam profile in the RPA regime may effectively ignite hot spot much better than in the Target Normal Sheath Acceleration (TNSA) counterpart. It is estimated that the proton-Carbon beam proposal can reduce ion beam energy to 8.42 kJ, approximately saving 15% of ignitor energy. K E Y W O R D Sconically guided fast ignition, laser-accelerated ion beam, proton and carbon beam, RPA, TNSA

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Section: Introductionmentioning

confidence: 99%

On the evaluation of ignition threshold in proton‐carbon hybrid ignitor beam proposal

Mehrangiz

Khoshbinfar

2019

Contributions to Plasma Physics

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Control of intense-laser ion acceleration

Nishiura

Satou

Kawata

et al. 2020

High Energy Density Physics

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Even-order harmonic generation from nonlinear Thomson backscatter in a tightly focused Gaussian laser pulse

Hong

Wei

et al. 2022

Physics of Plasmas

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The electron dynamics and the Thomson backscattering spectra for an electron accelerating in a tightly focused Gaussian laser pulse are first investigated in detail. It is found that for a tightly focused Gaussian laser pulse, the ponderomotive force introduced due to the non-uniform intensity distribution of the laser pulse has the tendency to push out the electron from the laser pulse, which leads to the trajectory symmetry-breaking of the electron and then the generation of the even-order harmonics at the same time. Further, for the tightly focused Gaussian laser pulse, changes in several laser parameters, such as the increase of the laser peak amplitude, lengthening of the pulse width, and decrease of the beam waist, lead earlier to the relative ejected position of the electron to the laser pulse, which causes the more obvious trajectory symmetry-breaking of the electron, and then the more intensive peak intensity of the even-order harmonics. It is different from the well-known results of the plane waves and the Gaussian laser pulse with uniform transverse intensity distribution and provides a possible way for the generation of the even-order harmonics in nonlinear Thomson backscattering.

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Ion beam bunching via phase rotation in cascading laser-driven ion acceleration

Cited by 4 publications

References 42 publications

On the evaluation of ignition threshold in proton‐carbon hybrid ignitor beam proposal

On the evaluation of ignition threshold in proton‐carbon hybrid ignitor beam proposal

Control of intense-laser ion acceleration

Even-order harmonic generation from nonlinear Thomson backscatter in a tightly focused Gaussian laser pulse

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