Plasma characteristics of energetic liquid polymer ablated by nanosecond laser pulses

doi:10.1007/s12200-018-0752-x

Front. Optoelectron.

2018, Vol. 11

Issue (3) : 261-266 https://doi.org/10.1007/s12200-018-0752-x

RESEARCH ARTICLE

Plasma characteristics of energetic liquid polymer ablated by nanosecond laser pulses

Jing QI, Siqi ZHANG, Tian LIANG, Weichong TANG, Ke XIAO, Lu GAO, Hua GAO, Zili ZHANG, Zhiyuan ZHENG(

)

School of Science, China University of Geosciences, Beijing 100083, China

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Abstract

The plasma characteristics of carbon-doped glycidyl azide polymer (GAP) are investigated ablation by nanosecond laser pulses. For the GAP energetic liquid, a specific impulse of 840 s and an ablation efficiency up to 98% are obtained, which can be attributed to the low mass loss owing to the carbon doping. A comparison between the chemical energies shows that the carbon-doped GAP provides better propulsion than pure GAP. This indicates that even for an energetic liquid, an efficient approach to enhance the thrust performance is to reduce the splashing. High ablation thrust could be achieved at a low laser fluence and high carbon content.

Keywords laser plasma energetic liquid carbon content

Corresponding Author(s): Zhiyuan ZHENG

Just Accepted Date: 15 March 2018 Online First Date: 04 April 2018 Issue Date: 31 August 2018

Cite this article:

Jing QI,Siqi ZHANG,Tian LIANG, et al. Plasma characteristics of energetic liquid polymer ablated by nanosecond laser pulses[J]. Front. Optoelectron., 2018, 11(3): 261-266.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-018-0752-x
https://academic.hep.com.cn/foe/EN/Y2018/V11/I3/261

Fig.1 Schematic of the experimental setup with two crossing beams for the measurement of the target velocity

Fig.2 C_m (coupling coefficient), I_sp (specific impulse), target momentum, and mass loss as a function of the laser fluence for ablation of pure GAP

Fig.3 Dependences of the C_m (coupling coefficient), Isp (specific impulse), momentum, and mass loss as a function of the carbon content for a laser fluence of 15 J/cm2

Fig.4 Dependence of the ablation pressure as a function of the focus positions for carbon-doped (5%) GAP. The position of zero corresponds to the cavity bottom, while the position of 1.5 mm corresponds to the target surface

Fig.5 Dependence of the ablation efficiency as a function of the (a) laser fluence for pure GAP and (b) carbon content for a laser fluence of 15 J/cm²

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