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Pressure dependence of argon cluster size for different nozzle geometries

机译：不同喷嘴几何形状的氩气团簇尺寸与压力的关系

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摘要

We experimentally study Rayleigh scattering from a cluster jet produced by high pressure argon gas expanding into vacuum through four different nozzles (a supersonic slit nozzle, a slit nozzle, a conical nozzle, and a sonic nozzle). The scattering signal intensity and the scattering image are recorded by photomultiplier tube and charge-coupled device camera, respectively. Based on the scattering image, the atom density in the gas flow is estimated. This allows for the comparison of the dependence of average cluster size on argon gas backing pressure between the nozzles. The experimental results show that the planar expansion developed from the supersonic slit and the slit nozzles exhibits the higher atom density than the axisymmetric expansion from the conical and the sonic nozzles. The slit nozzle is shown to have the highest pressure dependence of average cluster size. It is found that the supersonic slit nozzle is more favorable to the large clusters than the slit nozzle under the backing pressure of up to 50 bars, though it has the lower pressure dependence of average cluster size.
机译：我们通过实验研究由高压氩气通过四个不同的喷嘴（超音速狭缝喷嘴，狭缝喷嘴，圆锥形喷嘴和声波喷嘴）膨胀成真空的簇状射流产生的瑞利散射。散射信号强度和散射图像分别由光电倍增管和电荷耦合器件相机记录。基于散射图像，估计气流中的原子密度。这允许比较平均簇尺寸对喷嘴之间的氩气背压的依赖性。实验结果表明，由超音速狭缝和狭缝喷嘴产生的平面膨胀比由圆锥形和声波喷嘴产生的轴对称膨胀具有更高的原子密度。所示的狭缝喷嘴对平均簇尺寸具有最高的压力依赖性。已经发现，在高达50 bar的背压下，超音速狭缝喷嘴比狭缝喷嘴对大簇更有利，尽管它对平均簇尺寸的压力依赖性较低。

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  • 来源
    《Journal of Applied Physics》 |2009年第5期|053507.1-053507.6|共6页
  • 作者

    Guanglong Chen; Byunghoon Kim; Byungnam Ann; Dong Eon Kim;

  • 作者单位

    Department of Pohang University of Science and Technology (POTECH), Pohang 790-784, Republic of Korea;

    Department of Pohang University of Science and Technology (POTECH), Pohang 790-784, Republic of Korea;

    Department of Pohang University of Science and Technology (POTECH), Pohang 790-784, Republic of Korea Vacuum Measurement Technology, Pohang 790-320, Republic of Korea;

    Department of Pohang University of Science and Technology (POTECH), Pohang 790-784, Republic of Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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