Microcalorimetry of dust particles in a radio-frequency plasma
Microcalorimetry of dust particles in a radio-frequency plasma
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射频等离子体中尘埃颗粒的微量热法
DOI：
10.1063/1.1302993
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发表时间：
2000
影响因子：
3.2
通讯作者：
G. Kroesen
中科院分区：
文献类型：
--
作者：
Ghpm Geert Swinkels;H. Kersten;H. Deutsch;G. Kroesen
在不同的等离子体条件下，测量了浸在射频等离子体中的罗丹明B染色尘埃粒子（2rp=1.2 μm）的内部温度。为此，染料已被激发与氩离子激光和荧光发射的颗粒已被记录与光学多通道分析仪系统。与校准曲线比较后确定了温度。在氩气中，粒子温度随射频功率的增加而增加，与压力无关。在氧气中，也观察到随射频功率的增加。然而，朝向颗粒的能量通量还包括通过原子复合（缔合）和放热燃烧反应的加热。这些温度测量值进行了比较与计算的基础上的热平衡，其中气体温度，电子密度和电子温度的测量已被使用。理论与实验结果吻合较好。
The internal temperature of rhodamine B-dyed dust particles (2rp=1.2 μm) immersed in radio-frequency (rf) plasmas has been measured for various plasma conditions. For this purpose, the dye has been excited with an argon-ion laser and the fluorescent emission of the particles has been recorded with an optical multichannel analyzer system. The temperature has been determined after comparison with calibration curves. In argon, the particle temperature increases with rf power and is independent of pressure. In oxygen, an increase with rf power is observed, too. However, the energy flux towards the particles includes also heating by atom recombination (association) and exothermic combustion reactions. These temperature measurements have been compared with calculations based on the thermal balance, where measurements of gas temperature, electron density, and electron temperature have been used. A good agreement between theory and experiment has been found.