An Investigation on Electric Discharge Type CO₂Mixing Supersonic Flow Laser (1st Report : Theoretical Basis of CO₂Supersonic Laser and Applicational Experiment of Supersonic Flow CO₂EDL)
CO_2 laser is widely investigated for the applications of material processing, isotope separation and so forth. The feature of this laser is its high efficiency and high power. For the power source of laser propulsion or nuclear fusion in the future, however, higher efficiency and larger power should be required. Gasdynamic laser (GDL) is one of the well known high power instruments, but the efficiency is much lower than that of electric discharge laser (EDL). The efficiency is greatly improved if flow mixing type is chosen in CO_2 EDL. It is necessary, on the other hand, to input a great deal of electric energy into the upper laser level of CO_2 and to have large mass flux in cavity. This report deals with experimental and analytical research to clarify the fun-damental characteristics of CO_2 supersonic flow mixing EDL. A system of equations for CO_2 EDL of high velocity are derived. Furthermore, parameters of supersonic flow and glow discharge in supersonic N_2 are measured. The dependence of small signal gain coefficient on stagnation pressure ratio. input power, active flow length in cavity is observed. The possibility of this CO_2 mixing laser is assured.
放電混合型CO₂高速気流レーザーに関する研究 (第1報 : レーザーの理論的基礎と超音速流の応用実験)
kiyo36_rikou_pp279-304.pdf
(2.37MB)
