Electron density and temperature of gas-temperature-dependent cryoplasma jet
Electron density and temperature of gas-temperature-dependent cryoplasma jet
复制标题
DOI：
10.1063/1.3552983
复制
发表时间：
2011-03
影响因子：
3.2
通讯作者：
Y. Noma;J. Choi;H. Muneoka;K. Terashima
中科院分区：
文献类型：
--
作者：
Y. Noma;J. Choi;H. Muneoka;K. Terashima
在室温到5K的等离子体气体温度范围内，研制了一种微型低温等离子体射流，并对其进行了分析。实验结果表明，低温等离子体射流的平均电子密度和电子温度依赖于气体温度。特别是，低温等离子体中的电子温度在60K附近开始迅速下降，从60K时的约13 eV下降到5K时的2 eV，而电子密度从室温到5K的约109 cm−3增加到约1012 cm Coulom3。这一现象导致了电子之间库仑相互作用的增加，这可以用维里状态方程来解释。
A microsize cryoplasma jet was developed and analyzed at plasma gas temperatures ranging from room temperature down to 5 K. Experimental results obtained from optical emission spectroscopy and current–voltage measurements indicate that the average electron density and electron temperature of the cryoplasma jet depend on the gas temperature. In particular, the electron temperature in the cryoplasma starts to decrease rapidly near 60 K from about 13 eV at 60 K to 2 eV at 5 K, while the electron density increases from about 109 to approximately 1012 cm−3 from room temperature to 5 K. This phenomenon induces an increase in the Coulomb interaction between electrons, which can be explained by the virial equation of state.