CAJ | 학술논문

应用同时迭代重建算法(SIRT)重建不均匀稠密氘氚等离子体的密度分布．在二维等离子体密度重建的数值模拟中，探测稠密等离子体的高能质子束可以由强激光和等离子体相互作用产生，且质子束经过稠密等离子体后的能量损失是比较重要的．如果已知入射质子束和出射质子束的能量分布，可以在出射质子束能量测量的误差水平未知的情况下用SIRT算法重建等离子体的密度分布．结果显示，SIRT算法的精确度高于以L-曲线为准则的Tikhonov正则化方法，并可以在数据量不完全时重建密度分布．
응용동시질대중건산법(SIRT)중건불균균주밀도천등리자체적밀도분포．재이유등리자체밀도중건적수치모의중，탐측주밀등리자체적고능질자속가이유강격광화등리자체상호작용산생，차질자속경과주밀등리자체후적능량손실시비교중요적．여과이지입사질자속화출사질자속적능량분포，가이재출사질자속능량측량적오차수평미지적정황하용SIRT산법중건등리자체적밀도분포．결과현시，SIRT산법적정학도고우이L-곡선위준칙적Tikhonov정칙화방법，병가이재수거량불완전시중건밀도분포．
Density reconstruction of inhomogeneous dense DT plasmas is studied with simultaneous iterative reconstruction technique (SIRT). In simulation of density diagnostics of a two-dimensional (2D) slice plasma, fast protons used for diagnostics can be generated with laser-plasma interaction and energy loss of fast protons going through plasmas is crucial. As original and final energies of protons are given, density reconstruction by SIRT method is done without noise level of final energies. Accuracy of the method is better than that of the Tikhonov regularization method based on deviation principle of L-curve. In addition,the SIRT method is available with incomplete data.