日冕磁场、密度不规则性等关键参数的探究是空间物理学焦点问题之一。由于日冕辐射暗弱及探测设备空间分辨率的限制，它们难以直接测量。基于冕环中衰减快扭曲波观测的"冕震学"工具是提供这些参数的主要间接手段，但其理论基础偏离太阳大气现实甚远，所造成的参数推测的不确定性还极少研究。本项目拟构建日冕磁环的尽可能贴近现实的磁流体动力学模型，对其中快扭曲模行波与驻波的激发、传播、束缚及衰减进行统一而自洽的研究；由此基于光谱学计算工具，合成辐射强度、谱线轮廓等成像及光谱学可观测量，进而利用标准的现有冕震学手段对冕环物理参数加以推测，通过其与"真值"的对比，定量评估现有冕震学推测手段的可靠性。特别地，将追踪"真实"冕环中快扭曲波的演化，探讨波动衰减的物理机制，明确共振吸收、相混合及横向泄露等主要衰减机制的相对重要性，由此明晰波动周期及衰减时间（或长度）作为冕震学工具来诊断日冕磁场和不均匀性的不确定性。

Measuring the magnetic field and density structuring in the solar corona is a key issue in space physics. However, the weak coronal emission combined with the limited spatial resolution of the currently available space-borne instruments makes such measurements difficult. An alternative approach based on the measured damped fast kink waves in coronal loops, the so-called "coronal seismology" approach, is the primary means for deducing them at present. However, the theoretical foundation on which this indirect approach is based is far from realistic. Assessing the uncertainties thereby caused, although crucial, has not been addressed. We will construct fully three-dimensional models of coronal loops, as realistic as possible, and examine the excitation, propagation, trapping and damping of fast kink waves that the loop system supports in a unified and self-consistent manner. We will then use the output from this three-dimensional model to synthesize observables such as the emission intensity and line profiles, which will then be used to deduce the coronal parameters using the standard seismological tools. By comparing the parameters hence deduced with those computed directly from the three-dimensional model, we will be able to evaluate how reliable these seismological tools are. We will trace the temporal evolution of fast kink waves in a realistic coronal loop and pinpoint their damping mechanism. In particular, we will elucidate the relative importance of the primary competing ideas for explaining this damping, namely, resonance absorption, phase mixing, and lateral leakage. The results will enable us to tell the reliability of the seismological tools based on the measurements of the wave periods and damping time/length, as far as the deduction of the coronal magnetic field and density structuring is concerned.