Non-Fourier effects in the thermal protection against high-power ultra-fast laser pulses

Lenarczyk, Marcin; Domański, Roman

doi:10.1051/e3sconf/20187003008

Cited by 2 publications

(2 citation statements)

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“…High power lasers are applicable on numerous fields such as laser machining [1], space science [2], and military application [3], [4]. Thanks to the development of high power laser system, such as chemical laser, high power laser of kW level has been realized [5]- [9]. Chemical lasers are somewhat bulky as they require a large amount of chemical storage and cooling system for its proper functioning [10].…”

Section: Introductionmentioning

confidence: 99%

Target Aiming Point Focusing Strategy for Destroying a Short-Range Target Using Distributed Laser Systems

Kim

2023

IEEE Access

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Consider a scenario where multiple high power laser weapon systems are positioned closed to a base, in order to protect the base from an aerial target, such as a missile. We consider destroying a short-range flying target which is sufficiently close to the base. Using multiple lasers can reduce thermal blooming, which decreases the effective power that can be delivered to a target site in the atmosphere. Thus, this paper proposes utilizing multiple high power laser sources to aim on a single point of the target to maximize the attack efficiency and avoid directional disturbances. Once a target is detected by a search radar system, then the position of the target can be calculated in global coordinate systems and is shared by all laser systems through fiber-based wired links. Then, each laser aims at the target followed by firing at the target. This paper presents how to make multiple high power lasers aim at a single target point for maximizing the attack efficiency. Considering the case where there are more than one high power laser sources, this paper is novel in addressing the control and synchronization of every laser system. MATLAB simulations are used to verify the effectiveness of the proposed multi-laser systems.

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Section: Introductionmentioning

confidence: 99%

Target Aiming Point Focusing Strategy for Destroying a Short-Range Target Using Distributed Laser Systems

Kim

2023

IEEE Access

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“…Different from Fourier's law, a hysteresis effect of temperature gradient is produced at the time t in a certain area of the system, where a heat flow vector appears at time t + τ q instead of time t [18]. Through this improvement, the CV model has been widely used in the fields of biology medicine [19], ultra-fast lasers [20,21] and microelectronics [22,23]. Zhang et al [24] used the CV model to investigate the range of heat-affected under step pulse actions in a semi-infinite space.…”

Section: Introductionmentioning

confidence: 99%

Non-Fourier Heat Conduction of Nano-Films under Ultra-Fast Laser

Mao

Liu

et al. 2023

Materials

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The ultra-fast laser heating process of nano-films is characterized by an ultra-short duration and ultra-small space size, in which the classical Fourier law based on the hypothesis of local equilibrium is no longer applicable. Based on the Cattaneo–Vernotte (CV) model and the dual-phase-lag (DPL) model, the two-dimensional analytical solutions of heat conduction in nano-films under ultra-fast laser are obtained using the integral transformation method. The results show that there is a thermal wave phenomenon inside the film, which becomes increasingly evident as the elapse of the lag time of the temperature gradient. Moreover, the wave amplitude in the vertical direction is much larger than that in the horizontal direction of the nano-film. By comparing the numerical result of the two models, it is found that the temperature distribution inside the nano-film based on the DPL model is gentler than that of the CV model. Additionally, the temperature distribution in the two-dimensional solution is lower than that in the one-dimensional solution under the same Knudsen number. In the comparison results of the CV model, the maximum peak difference in the thermal wave reaches 75.08 K when the Knudsen number is 1.0. This demonstrates that the horizontal energy carried by the laser source significantly impacts the temperature distribution within the film.

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Non-Fourier effects in the thermal protection against high-power ultra-fast laser pulses

Cited by 2 publications

References 5 publications

Target Aiming Point Focusing Strategy for Destroying a Short-Range Target Using Distributed Laser Systems

Target Aiming Point Focusing Strategy for Destroying a Short-Range Target Using Distributed Laser Systems

Non-Fourier Heat Conduction of Nano-Films under Ultra-Fast Laser

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