Laser-induced rotation of a levitated sample in vacuum
Laser-induced rotation of a levitated sample in vacuum
复制标题
真空中悬浮样品的激光诱导旋转
DOI：
10.1063/1.1150127
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发表时间：
1999
影响因子：
1.6
通讯作者：
P. Paradis
中科院分区：
文献类型：
--
作者：
W. Rhim;P. Paradis
本文描述了一种利用光子压力系统地控制悬浮在高真空中的样品的转动状态的方法。将锆球悬浮在高温静电悬浮器中，并通过用高功率激光的窄光束照射偏离质心的点来旋转锆球。在激光加热样品的同时，也产生了与激光功率和扭臂长度成正比的转矩，给出了简单的理论依据，并在~2000 K下用固体锆球进行了验证。该方法对于无容器材料高温加工中悬浮样品的旋转状态的系统控制具有重要意义。
A method of systematically controlling the rotational state of a sample levitated in a high vacuum using the photon pressure is described. A zirconium sphere was levitated in the high-temperature electrostatic levitator and it was rotated by irradiating it with a narrow beam of a high-power laser on a spot off the center of mass. While the laser beam heated the sample, it also rotated the sample with a torque that was proportional both to the laser power and the length of the torque arm. A simple theoretical basis was given and its validity was demonstrated using a solid zirconium sphere at ~2000 K. This method will be useful to systematically control the rotational state of a levitated sample for the containerless materials processing at high temperature.