In contrast to ion beams produced by conventional accelerators, ion beams accelerated by ultrashort intense laser pulses have advantages of ultrashort bunch duration and ultrahigh density, which are achieved in compact size. However, it is still challenging to simultaneously enhance their quality and yield for practical applications such as fast ion ignition of inertial confinement fusion. Compared with other mechanisms of laser-driven ion acceleration, the hole-boring radiation pressure acceleration has a special advantage in generating high-fluence ion beams suitable for the creation of high energy density state of matters. In this paper, we present a review on some theoretical and numerical studies of the hole-boring radiation pressure acceleration. First we discuss the typical field structure associated with this mechanism, its intrinsic feature of oscillations, and the underling physics. Then we will review some recently proposed schemes to enhance the beam quality and the efficiency in the hole-boring radiation pressure acceleration, such as matching laser intensity profile with target density profile, and using two-ion-species targets. Based on this, we propose an integrated scheme for efficient high-quality hole-boring radiation pressure acceleration, in which the longitudinal density profile of a composite target as well as the laser transverse intensity profile are tailored according to the matching condition.

An analytical model for hole boring proton acceleration by a circularly-polarized CO₂ laser pulse in a gas jet is developed. The plasma density profile near the density peak is taken to be rectangular, with inner region thickness l around a laser wavelength and density 10% above the critical, while the outside density is 10% below the critical. On the rear side, plasma density falls off rapidly to a small value. The laser suffers strong reflection from the central region and, at normalized amplitude a₀≥1, creates a double layer. The space charge field of the double layer, moving with velocity v_fz^, reflects up-stream protons to 2v_f velocity, incurring momentum loss at a rate comparable to radiation pressure. Reflection occurs for v_f≤ω_p (z_flm/m_p)^-1/2 , where m and m_p are the electron and proton masses, z_f is the distance traveled by the compressed electron layer and ω_p is the plasma frequency. For Gaussian temporal profile of the laser and parabolic density profile of the upstream plasma, the proton energy distribution is narrowly peaked.

光压摄动模型是卫星动力学模型的主要误差源之一，定轨时是否考虑光压参数将影响轨道估计精度。在光压摄动的理论基础上，采用统计定轨方法，利用全球8个卫星激光测距(SLR)站观测值，对Jason-2卫星进行动力学定轨。采用内符合精度、外符合精度和重叠弧段比较三种评估手段，定量分析光压参数估计与否对轨道精度的影响。结果表明：三天估计一组光压参数计算的卫星轨道比不估计光压参数计算的卫星轨道的精度更高，且估计的轨道参数变化更平稳。

本文采用有限体积法建立了交叉型细胞分离模型，提出了一种基于光压差分的细胞筛选仿真方法，分析微流体中细胞筛选的影响因素。基于层流、流体流动粒子追踪、波动光学理论，利用有限元分析法建立了一种交叉型光学颗粒分离模型，研究了利用光压差分技术分离细胞的各种影响因素，其中包括微粒直径，激光功率、温度、光纤直径，分析了微粒在流体中因光辐射压力作用下的偏移距离。实验结果表明: 在微流体中，激光功率、细胞直径、温度(20 ℃)和偏移距离大体上成正比关系，光纤直径和细胞直径在大小相当的情况下光辐射压力能够达到最大值，当激光通过光纤作用于直径分别为3，8和20 μm的微粒时，光纤直径为7 μm或8 μm时光辐射压力最大，所以选用直径为8 μm的单模光纤作为一个重要的实验光学器件。所得结论为深入研究细胞筛选影响因素的数值仿真精度提供了参考与借鉴。

为了研究激光辐射压驱动的运动电场中加速质子的相关问题, 对强激光与等离子体相互作用过程进行了理论分析, 并采用2维粒子模拟方法, 对理论分析结果进行了数值模拟验证。结果表明, 当超短超强激光脉冲与处在背景等离子体前方的薄固体平靶相互作用时, 在固体靶后部形成一个由电子层-离子层组成的双层结构, 在激光辐射压的不断推进下, 双层结构在背景等离子体里以一定速度传播形成一个运动电场; 在背景等离子体中的质子被这个运动电场捕获并能加速到很高的能量, 质子的最大能量达到20GeV。理论分析结果与2维粒子模拟结果符合得很好。

激光干涉仪在引力波发现中起着关键作用,光量子噪声是干涉仪灵敏度进一步提高的主要障碍。详细分析了光量子噪声中霰弹噪声和辐射压力噪声产生的机制和主要特点,讨论了标准量子极限,扼要介绍了信号循环、压缩光场等标准量子极限突破技术。

研究了激光辐射压驱动的两级质子加速的相关问题。当超短超强激光脉冲与处在背景等离子体前方的薄固体平靶相互作用时, 在固体靶后部形成一个电子层-离子层组成的双层结构。在激光的不断推进下, 双层结构在背景等离子体里以一定速度传播, 可以看成运动在背景等离子体中的电场。这样, 在背景等离子体中的质子被这个运动电场捕获并能加速到很高的能量。通过二维PIC模拟方法和理论分析研究了质子加速的相关问题。研究结果表明, 被加速质子的最大能量达到20 GeV。

利用一维质点网格法（PIC）数值模拟了低密度等离子体薄膜对高强度激光脉冲的整形效应，通过改变薄膜靶的厚度，得到了不同宽度的具有陡峭上升沿的激光脉冲。研究结果表明，激光脉冲的前沿被光压驱动形成的高速运动电子层反射，激光脉冲主要部分在电子层到达靶后表面时发生透射。激光等离子体薄膜相互作用过程中没有形成电子-离子双层结构，电子层到达靶后表面时迅速扩散消失不再反射光脉冲，因此透射的激光脉冲峰值功率衰减较少。