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Design and Experimental Research of 45-GHz Quasi-optical Transmission Line for Melting Rock

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Abstract

The 45-GHz quasi-optical transmission line including three quasi-optical mirrors for melting rock as an advanced drilling technology has been designed, machined, and experimentally tested in this paper. Based on the Stratton–Chu formula and the mirror optimization program, the surface structure of the three quasi-optical mirrors which transmit the Gaussian wave beam from the 45-GHz gyrotron to the sample rock surface has been obtained. The gyrotron output power is adjustable from 0 to 20 kW. The experiment results show that when the output power of the gyrotron was 5 kW in a continuous wave (CW) regime (30 s), the maximum power density reached is 552 W/cm2 and the maximum temperature of the sample stone reached is 968.9 °C. When the output power of the gyrotron was 15 kW in a CW regime (60 s), the maximum power density reached is 1650 W/cm2 and the maximum temperature of the sample stone reached is 2032.6 °C. Meanwhile, it is important to process the high-density plasma produced by the vaporized rock in time.

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Data Availability

The data that support the findings of this study are available from the authors on reasonable request.

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Funding

This work was supported in part by the National key R&D Program of China under Grant 2017YFE0300200, 2017YFE0300201, and 2017YFE0130000; in part by the National Natural Science Foundation of China under Grant 61988102, 92163204, and 61921002; and in part by Sichuan Science and Technology Program under Grant 2020YFG0114.

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Authors and Affiliations

  1. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Jianwei Liu, Lina Wang & Xinjian Niu

  2. Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou, 730000, China

    Junwei Guo

  3. School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Xu Sun

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  1. Jianwei Liu
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  2. Junwei Guo
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  3. Lina Wang
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  4. Xinjian Niu
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Correspondence to Jianwei Liu.

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Liu, J., Guo, J., Wang, L. et al. Design and Experimental Research of 45-GHz Quasi-optical Transmission Line for Melting Rock. J Infrared Milli Terahz Waves 43, 213–224 (2022). https://doi.org/10.1007/s10762-022-00855-5

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  • DOI: https://doi.org/10.1007/s10762-022-00855-5

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