Radiation Spectral Characteristics of Sapphire Under Light-Gas Gun Impact Loading

Ningchao Zhang; Juan Ren; Peng Wang; Fusheng Liu

doi:10.3788/AOS201838.0530002

Acta Optica Sinica, Volume. 38, Issue 5, 0530002(2018)

Radiation Spectral Characteristics of Sapphire Under Light-Gas Gun Impact Loading

Ningchao Zhang^1、*, Juan Ren¹, Peng Wang¹, and Fusheng Liu¹

Author Affiliations

¹ College of Electronics and Information Engineering, Xi'an Technological University, Xi'an, Shaanxi 710021, China

¹ Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

¹ School of Science, Xi'an Technological University, Xi'an, Shaanxi 710021, China

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Figures & Tables(7)

Fig. 1. Structure schematic of spectrum measurement system

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Fig. 2. Experimental signals from pyrometer at pressure of 48 GPa. (a) λ=809 nm; (b) λ=779 nm; (c) λ=650 nm; (d) λ=533 nm

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Fig. 3. (a) Fitted temperature curve and (b) fitting error of sapphire at impact pressure of 48 GPa

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Fig. 4. Experimental signal measured by spectrometer at pressure of 48 GPa

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Fig. 5. Comparison between radiation temperatures and high pressure melt line

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Table 1. Calibrated spectral radiant luminance of the standard bromine tungsten lamp
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Table 1. Calibrated spectral radiant luminance of the standard bromine tungsten lamp
λ /nm 809 779 702 650 589 533 509 488
N_r(λ) /(μW·cm^-2·nm) 1.58 1.55 1.40 1.23 0.98 0.71 0.59 0.49

Table 2. Fitted shock pressure and temperatures
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Table 2. Fitted shock pressure and temperatures
No. v /(km·s^-1) F /GPa $\begin{matrix} {T_{P}}_{} \end{matrix}$ /K $\begin{matrix} {T_{I}}_{} \end{matrix}$ /K
1 1.95 40 4095±131 3971±54
2 2.20 48 4290±150 4223±42
3 2.53 60 4910±147 4907±58
4 3.58 87 4709±108 4698±49

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Ningchao Zhang, Juan Ren, Peng Wang, Fusheng Liu. Radiation Spectral Characteristics of Sapphire Under Light-Gas Gun Impact Loading[J]. Acta Optica Sinica, 2018, 38(5): 0530002

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