Main Research Interests

• Advanced scheme of laser fusion

  The double-cone ignition (DCI) scheme has been proposed by Prof. Jie Zhang, as one of the alternative approaches to inertialconfinement fusion, based on direct-drive and fast-ignition to significantly reduce the energy requirement for both the compression and heating laser pulsesas well as to enhance the robustness of the compression and heating processes.
  双锥对撞点火方案（“DCI”）是张杰院士提出的结合直接驱动、快点火、磁化点火等高效驱动方式的形成的新型激光聚变点火方案。在过去五年的8轮大型物理实验中，双锥对撞激光聚变（DCI）方案已完成了对全部分解物理过程的可行性验证。现有的结果已经证明DCI方案在加热效率、流体力学不稳定性控制等方面相较美国国家点火装置（NIF）的传统聚变方案具有明显优势。
  



• Novel laser-driven THz radiation and applications

By utilizing ultrafast intense laser interactions with matter (plasmas or optical crystals), novel high-power terahertz (THz) radiation sources have been explored, including the underlying THz generation mechanisms, the manipulation of THz radiation properties and the development of new THz detection and application techniques. Such an extreme THz source enables the nonlinear interactions of strong-field THz wave with matter (condensed materials, biochemical samples, plasma, etc.) like the intense THz pulse-driven strong-field physics and ultrafast control over matter, opening up new applications of THz radiation in the fields of material science, life science, laser plasmas and so on.
利用超快强激光与(等离子体、光学晶体等)物质相互作用，产生新型高功率太赫兹辐射源，探索太赫兹产生机制，调控太赫兹辐射性质，发展新型太赫兹探测及应用技术；研究强太赫兹脉冲与(凝聚态材料、生物化学样品、等离子体等)物质的非线性相互作用，探索强太赫兹场致超快物态调控、太赫兹强场物理等新现象，开辟强场太赫兹辐射在物质科学、生命科学、激光等离子体等领域的新应用。



• Laser-driven ultrafast X-ray dynamics user beamline

  Huairou PW Laser system is user facility affiliated to the Synergetic Extreme Condition User Facility（SECUF）. The SECUF is national research infrastructure built by IOP, CAS, which can provide extreme experimental conditions including extremely low temperature, strong magnetic field, ultra-high pressure, and ultrafast light field for domestic and international users to conduct frontier research in material science. The Beijing part of the facility has been opened for users in early 2023. As a subsystem of the SECUF, the primary function of the Huairou PW Laser system is to provide ultra-intense light fields and laser-driven ultrafast x-rays for conducting studies on high energy density physics and the diagnosis of ultrafast dynamics. Figure 1 shows the layout of the Huairong PW laser system and target areas.
  综合极端条件实验装置位于怀柔科学城，是集极低温、超高压、强磁场、超快光场等极端条件为一体的用户装置。超快X射线动力学实验站隶属于超快光场物性研究系统，是国内第一个以高功率激光驱动的超快X射线作为开放资源的用户装置。不同于传统的同步辐射光源通常在10ps尺度的脉冲宽度和时间分辨率，飞秒激光驱动的X射线源具有飞秒（fs）时间分辨的超快动态诊断能力；此外，还具有微小源尺寸、台面化等特色，具有极大的灵活性和极高的经济性, 可作为传统光源在超快时间分辨探测领域的有效补充。
  
  



• Ultrafast electron diffraction user beamline

  Ultrafast electron diffraction (UED) technique is a novel tool for gaining new insights into lattice dynamics with unprecedented temporal and spatial sensitivity, inherited from ultrafast laser and ultrashort wavelength of the electrons. With our evolving UED beamline, we wish to provide users new opportunities to explore ultrafast dynamics in condensed matter physics such as photo-induced structural phase transition, the mutual coupling among lattice and other degrees of freedom, the evolution of charge density waves and so on.
  超快电子衍射（UED）技术是一种结合了飞秒激光的高时间分辨能力和电子衍射的高空间解析特性的先进技术，用于研究晶格的动力学过程。利用我们不断发展的UED 技术，我们希望为用户创造新的机遇去探索凝聚态物理学中超快动力学，如光诱导的结构相变、晶格与其他自由度之间的相互耦合、电荷密度波的演化等。
  
  



• Laboratory astrophysical processes

  The plasmas generated by the new generation of chirped pulse amplification lasers can create an extreme physical environment of high temperature high pressure high density extremely strong magnetic field and violent acceleration, which are very close to conditions inside the Sun and other stars. It is fascinating to recreate such an astrophysical environment governed by large scale hydrodynamic instabilities, radiation transport and gravitational interaction in the laboratory, which will help our understanding of the physical processes inside the Sun and other stars.
  超短脉冲强激光与固体靶相互作用产生的高温、高压、高密、强磁场、大加速度等性质与太阳及其他许多恒星中的物理条件非常相似。通过实验室里模拟研究这种等离子体中的辐射输运、大尺度流体不稳定性、热核反应等过程对于天体物理学家了解太阳和其他恒星中的物理过程提供了极好的实验手段。

International Collaborations