Studies of melting ice using CO2 laser for ice drilling
Studies of melting ice using CO2 laser for ice drilling
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DOI：
10.1016/j.coldregions.2015.09.014
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发表时间：
2016
影响因子：
4.1
通讯作者：
T. Sakurai;H. Chosrowjan;T. Somekawa;M. Fujita;H. Motoyama;O. Watanabe;Y. Izawa
中科院分区：
文献类型：
--
作者：
T. Sakurai;H. Chosrowjan;T. Somekawa;M. Fujita;H. Motoyama;O. Watanabe;Y. Izawa
二氧化碳激光可以用来融化冰。在这里，我们使用10.6 μm的CO2激光，在冰强烈吸收的波长下，通过融化钻穿冰。由此产生的钻孔速度测量在几个照射强度，冰雪密度，和相对于水平轴的光束角度。速度几乎与激光强度成比例地增加。例如，对于约50 W/cm 2的强度，密度为153 kg/m3的雪的融化速度为4 mm/s，固体冰的融化速度为0.8 mm/s。结果还表明，对于向下的光束角度，融水积聚在孔中，降低钻孔速度。然而，我们也考虑其他激光介质，并认为光纤耦合激光钻孔系统可用于冰川和冰盖上的钻孔。
A CO2laser can be used to melt ice. Here we use a CO2laser at 10.6 μm, a wavelength at which ice strongly absorbs, to drill (via melting) through ice. The resulting drilling speed is measured at several irradiation intensities, ice-snow densities, and beam angles relative to the horizontal axis. The speed increases nearly in proportion to the laser intensity. For an intensity of about 50 W/cm2, for instance, the melting speed is 4 mm/s for snow of density 153 kg/m3and 0.8 mm/s for solid ice. Results also show that for downward beam angles, melt-water accumulates in the hole, reducing the drilling speed. Nevertheless, we also consider other laser mediums and argue that an optical-fiber-coupled laser drilling system could be used for drilling on glaciers and ice sheets.