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

Rahman, O.; Tong, Sheng-Fei; Sheng, Zhen

doi:10.1063/1.5143344

Cited by 10 publications

(1 citation statement)

References 36 publications

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“…Microelectromechanical system (MEMS) transducers have the characteristics of structural miniaturization, energy exchange information, and sequence integration that are developmentally important to the new generation of pyrotechnics. Microstructure transducers are a core part of MEMS pyrotechnics, and determine their ignition performance, safety, and reliability, all of which affect the combat effectiveness of weapons and ammunition [1][2][3]. Microstructure transducers are made mainly of metal or semiconductor materials deposited on insulating substrates.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Ignition Properties of Tantalum Nitride Thin-Film Energy Transducers

Ren¹,

Yu²,

Xie³

et al. 2022

Preprint

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Tantalum nitride (TaN) has excellent electrical properties that can be used as an energy transducer in the ignition field. In this study, TaN film transducers with different bridge parameters were designed and fabricated in an attempt to reduce its energy consumption. The ignition sensitivity of the film transducers was tested using the Langley method. The results revealed that the ignition voltage is the lowest when the thickness of the film is 0.9 µm. If the thickness and length of the bridge film are fixed, the ignition voltage of the transducer first decreases and then increases with the width of the bridge film increases. When the thickness and width of the bridge film are fixed, the ignition voltage of the transducer is first decrease and then increase with the length of the bridge film increases. We also evaluated the ignition mechanism of TaN film transducers. By comparing the performance of TaN, semiconductor bridge (SCB), and nickel–chromium (Ni–Cr) film transducers, the TaN and SCB transducers are proven to have similar ignition performances, which are better than the Ni–Cr transducer. The negative temperature coefficient of TaN and the positive feedback after the initial electrothermal ignition promoted the growth and strengthening of plasma in the bridge film, allowing the medicament to ignite quickly. When the feasibility of the process and the influence of the bridge film parameters on ignition sensitivity are considered, the preferred design parameters of the transducer are a thickness of 0.9 µm and a bridge film size of 0.3 mm×0.3 mm. This study shows that TaN can be utilized as a high-performance transducer.

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Section: Introductionmentioning

confidence: 99%

Preparation and Ignition Properties of Tantalum Nitride Thin-Film Energy Transducers

Ren¹,

Yu²,

Xie³

et al. 2022

Preprint

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Collimated proton beam from an ultra-intense laser pulse irradiating parallel to the plasma interface

Haider

Sheng

2021

AIP Advances

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Recently, there has been some works on surface plasma waves excited by a laser obliquely irradiating on a thin foil target, which can cause stronger target normal sheath acceleration of protons but cannot be excited by a grazing incidence laser. Here, we demonstrate that a large amplitude Interface Plasma Wave (IPW) can be excited by a relativistic laser pulse irradiating parallel (or grazing incidence) to the interface of a solid aluminum and low density hydrogen layer. This IPW markedly enhances the sheath electric field to accelerate protons and reduce reflection of the laser pulse to improve the coupling efficiency. As a result, a collimated high energetic and lower energy spread proton beam can be efficiently achieved.

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High-quality GeV proton beam generation from multiple-laser interaction with double-layer target

Rahman

Sheng

2021

Physics of Plasmas

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A scheme for significantly enhancing the beam quality of laser-driven proton acceleration is proposed and investigated with particle-in-cell simulation: two linearly polarized Gaussian laser pulses obliquely irradiate a double-layer target that acquires a periodic surface structure that reduces the reflection, improves the focusing, and enhances the energy coupling of the third, or main, laser pulse that follows. The oblique pulses also provide some initial kinetic energy to the initially static target electrons and thus protons, which is very crucial for efficient acceleration. As a result, a proton beam of 1.15 GeV peak energy, very low energy spread ∼4%, and small divergence angle ∼5° can be obtained with laser intensities of 1021 W cm−2, which is significantly lower than that of the other recently proposed schemes.

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

Cited by 10 publications

References 36 publications

Preparation and Ignition Properties of Tantalum Nitride Thin-Film Energy Transducers

Preparation and Ignition Properties of Tantalum Nitride Thin-Film Energy Transducers

Collimated proton beam from an ultra-intense laser pulse irradiating parallel to the plasma interface

High-quality GeV proton beam generation from multiple-laser interaction with double-layer target

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