Enhancement of proton energy by polarization switch in laser acceleration of multi-ion foils

Liu, Tung Chang; Shao, Xi; Liu, Chuan Sheng; Eliasson, Bengt; Wang, Jyhpyng; Chen, Shih Hung

doi:10.1063/1.4826510

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…The most severe problem that so far has prevented a greater success of the RPA scheme is the Rayleigh-Taylor instability [26,27], which can rapidly disrupt the foil and broaden the ion energy spectrum [28]. Multi-ion species foils combined with different polarizations have been used to improve the energy spectrum of the accelerated protons [29,30]. Shockrelated mechanisms for reflection and acceleration of ions in the contexts of space and laboratory plasmas have been investigated in the past [31][32][33][34][35], and go under names such as laminar electrostatic shocks, double layers, etc.…”

Section: Introductionmentioning

confidence: 99%

Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas

Eliasson

2014

Physics of Plasmas

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A kinetic model for the shock acceleration of ions in laser-produced plasmas is developed. A fraction of the warm ions are accelerated by the large amplitude monotonic potential of the shock created due the plasma compression and electron heating by the laser. The kinetic model for the monotonic shock is based on the slow ion acoustic double layer (SIADL). It is found that the amplitude of the large amplitude SIADL is almost uniquely defined by the electron temperature. Therefore, a balance between electron heating and plasma compression is needed for optimal ion acceleration by this scheme. Typical Mach numbers of the monotonic shocks are close to 1.5. The scheme could potentially produce monoenergetic ions with a relative energy spread of less than 1%. The model is compared with recent simulations and experiments, where efficient shocks acceleration and production of monoenergetic protons have been observed. Similarities and differences with other shock models are pointed out and discussed

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Section: Introductionmentioning

confidence: 99%

Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas

Eliasson

2014

Physics of Plasmas

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“…The free-standing graphene are also potentially useful for many other applications. For instance, proton/ion acceleration with a very thin target is relevant to radiation pressure acceleration (RPA), which is considered to be more efficient than the conventional proton acceleration with thicker targets [21][22][23][24][25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

Large-area suspended graphene as a laser target to produce an energetic ion beam

Khasanah

Bolouki

Huang

et al. 2017

High Pow Laser Sci Eng

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Proton radiography is a key diagnostics to measure and image the electric/magnetic field in laser-produced plasmas. A thin solid target is irradiated with an intense laser pulse to produce a proton beam. The accelerated proton can achieve higher energy with thinner target. In order to produce an extremely thin target, we have developed a large-area suspended graphene as a laser target for energetic ion sources. We describe the manufacturing process of the suspended graphene, and show the results of quality evaluations.

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Enhancement of proton acceleration and conversion efficiency by double laser pulses plasma interactions

2020

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We report an efficient scheme to improve the proton acceleration and energy conversion efficiency by using double laser pulses with foil interaction. We find a significant increase in the peak energy, the total number, and the maximum energy of the accelerated protons for the double laser pulses with foil interaction compared to those in the single laser pulse case, while the total laser energy is kept constant. The role of the first pulse (pre-pulse) is to change the target electron distribution and reduce the reflection of succeeding laser pulse and hence enhance the laser absorption so that more energy of the second laser pulse (main pulse) is converted into the particle energy. The main pulse preferentially accelerates the slower electrons located deeper in the plasma, and it also accelerates the fast electrons due to volumetric heating. Finally, the protons are accelerated to high energy due to the laser break-out afterburner, when the target becomes relativistically transparent to the laser pulse.

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Enhancement of proton energy by polarization switch in laser acceleration of multi-ion foils

Cited by 3 publications

References 35 publications

Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas

Ion shock acceleration by large amplitude slow ion acoustic double layers in laser-produced plasmas

Large-area suspended graphene as a laser target to produce an energetic ion beam

Enhancement of proton acceleration and conversion efficiency by double laser pulses plasma interactions

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