3.3 衝撃超高圧力下におけるタンタルの状態方程式計測(3. レーザー誘起衝撃波圧縮による状態方程式計測, <小特集>レーザー誘起衝撃波圧縮を用いた状態方程式研究)

概要

論文の詳細を見る
We performed equation of state measurements of tantalum using laser-induced shock waves. A strong shock wave (>TPa) was generated in tantalum by the direct irradiation of laser beams from the GEKKO/HIPER glass laser system (laser wavelength λ_L=351nm, laser pulse width τ_L=2.5ns) of the ILE of Osaka University. A two-step, two-materials target, called a double-step target, was used in this experiment. The target assembly was fabricated from a base plate (aluminum or copper), a standard step (aluminum or copper), and a sample step (tantalum). The shock velocity was measured directly by observation of the emission from high temperature material or the change of the reflectivity of the rear surface of the target resulting from the arrival of the shock wave. Particle velocity and pressure were calculated using an impedance-matching technique. The obtained EOS data showed close agreement within the limits of experimental error with the extrapolation of the shock compression curve obtained by the conventional experimental shock technique.
社団法人プラズマ・核融合学会の論文
2004-06-25