Dynamic behavior of plasma-vapor produced by pulsed YAG laser irradiation.
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概要
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The results of optical observation of the plume produced with pulsed Nd: YAG laser irradiation are de-scribed. The dynamic behaviors were observed by means of high speed photography, and the structures wereanalized with the aid of spectroscopy and transmission electron microscopy (TEM).<BR>From the above experiments we obtained some conclusions as follows:<BR>1) The plume is mainly composed of the atomic vapor and the ultra fine particle of base materials.<BR>2) The mean moving speed of the plume is proportional to the laser intensity. There is a relation between the intensity (I) and the start time of plume (ts), as <I>I</I>=<I>t</I><SUB>s</SUB><SUP>-0.58</SUP>. This relation has been interpreted with simplifiedvapor model.<BR>3) he mean size of particles in the plume is 10-30nm in diameter. The size distribution can be controlled by laser intensity, and gas species and pressure in the atmosphere.
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社団法人 レーザー学会 | 論文
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