Study on the mechanism of periodic void generation in reactive dusty plasmas

我们研制了一种利用碘气体过滤器和CCD单色仪在低频区域测量拉曼散射的仪器。在适当的温度下，使散射光通过气体过滤器，使激光束的散射光强度降低到1/1000。然而，随着时间的推移，减少的幅度发生了显著变化。原因可能是激光头温度的稳定性。我们还利用氖气的一些发射线检查了CCD单色仪的分辨率，并确认它具有足够的分辨率（1.7 cm-1）来测量拉曼散射。此外，我们成功地在乙炔等离子体中通过检查合适的条件产生粉尘颗粒。

We developed an equipment for measuring Raman scattering in a low-frequency region using an iodine gas filter and a CCD monochromator. The intensity of scattering light of a laser beam was reduced to 1/1000 by the scattering light passing through the gas filter kept under a suitable temperature. However, the magnitude of reduction significantly changed with time. The reason would be the stability of temperature of the laser head. We also checked the resolution of the CCD monochromator using some emission lines from neon gas and confirmed that it has an enough resolution (1.7 cm-1) for measuring the Raman scattering. In addition, we successfully produced dust particles in an acetylene plasma by examining suitable conditions.