In this paper we systematically study the spectrum and structure of incompressible MHD turbulence by means of high resolution direct numerical simulations. We considered both balanced and imbalanced (cross-helical) cases and simulated sub-Alfvenic as well as trans-Alfvenic turbulence. This paper extends numerics preliminarily reported in Beresnyak & Lazarian (2008). We confirm that driven imbalanced turbulence has a stationary state even for high degrees of imbalance. Our major finding is that the structure of the dominant and subdominant Alfvenic components are notably different. Using the most robust observed quantities, such as the energy ratio, we were able to reject several existing models of strong imbalanced turbulence.
Observations of Transition from Imbalanced to Balanced Kinetic Alfvénic Turbulence
Purple Mountain Observatory, Chinese Academy of Sciences（中国科学院紫金山天文台）；Space Sciences Laboratory, University of California, Berkeley（加州大学伯克利分校空间科学实验室）；Physics Department, University of California, Berkeley（加州大学伯克利分校物理系）；School of Physics and Electronic Sciences, Changsha University of Science and Technology（长沙理工大学物理与电子科学学院）；LPC2E, CNRS, CNES, University of Orléans（奥尔良大学CNRS/CNES LPC2E研究中心）；International Space Science Institute (ISSI)（国际空间科学研究所）；University of California, Berkeley（加州大学伯克利分校）
Characterization of compressible fluctuations in solar wind streams dominated by balanced and imbalanced turbulence: Parker Solar Probe, Solar Orbiter and Wind observations
The University of Texas at Austin（德克萨斯大学奥斯汀分校）
研究通过分析Wind、Solar Orbiter和Parker Solar Probe的数据，探讨太阳风中压缩性波动的尺度依赖性和与等离子体β值及径向距离的关系，揭示压缩性波动在太阳风加速和加热中的作用。
Ion-Scale Waves Regulated by Plasma Beta and Cross Helicity: Observational Evidence for the Helicity Barrier in Imbalanced Solar Wind Turbulence
Institute of Space Physics, Luoyang Normal University（洛阳理工学院空间物理研究所）；Henan Key Laboratory of Electromagnetic Transformation and Detection（河南省电磁转换与探测重点实验室）；Space Science Center and Department of Physics and Astronomy, University of New Hampshire（新罕布什尔大学空间科学中心及物理与天文学系）；Department of Physics, University of Otago（奥塔哥大学物理系）；Research Center for Novel Solar-Blind Ultraviolet and Infrared Photoelectronic Detectors of Henan province（河南省新型日盲紫外红外光电探测器研究中心）
Minor Ions as a Diagnostic of Solar Wind Heating: Inverted Mass-to-Charge Scaling in Imbalanced Turbulence
University of Otago（奥塔哥大学）；Princeton University（普林斯顿大学）；Princeton Plasma Physics Laboratory（普林斯顿等离子体物理实验室）；Space Science Center and Department of Physics and Astronomy, University of New Hampshire（新罕布什尔大学空间科学中心及物理与天文学系）
