X-ray emission spectroscopy (XES) and optical Thomson scattering (OTS) are two of the most indispensable diagnostics for characterization of plasma parameters such as Te and ne in intense laser-produced plasmas (LPPs), but both can also provide weighted-average values owing to the line-of-sight, space, and time-integrated effects of optical/X-ray diagnostic techniques, which has not been thoroughly investigated. In this work, for the first time, the consistency and discrepancy between Te from XES and OTS are examined using intense lasers with a large focal spot to irradiate the smaller tip of a cylindrically symmetric titanium wire. Experimental results reveal that Te profiles derived from the two methods are approximately consistent in the earlier period of 1 ns, but exhibit different trends with increasing time. In addition, the impacts of the three integration effects on the interpretation of Te are assessed through an analysis of three types of XES methods, namely, time- and space-resolved, time-resolved but space-integrated, and time-integrated but space-resolved. Our findings indicate that the line-of-sight integration effect causes uncertainties of less than 5% in the electron temperature of corona LPPs, time-integrated XES can replace time-resolved measurements with an uncertainty of 10% for 1–2 ns laser duration, and space-integrated XES reflects the high-temperature region within 200 μm in front of the target surface, ∼10% lower than the maximum. These insights establish a foundation for the applications of experimental data in LPPs, particularly in the fields of laser-driven inertial confinement fusion and high-energy-density physics.

Collective Thomson scattering (CTS) is crucial for inertial confinement fusion (ICF) hohlraum diagnostics, but measurement of the electron plasma wave (EPW) feature remains challenging. The conventional collisionless model suffers from two critical defects: under low-temperature, high-density conditions it predicts an extremely narrow EPW peak that causes numerical sampling distortion, and it predicts a monotonic increase of peak intensity with decreasing scattering angle, which would mislead experimental design. To overcome these issues, the Bhatnagar–Gross–Krook (BGK) collisional model is introduced. The BGK model predicts a nonmonotonic peak intensity with an optimal angle between 30° and 60°, and yields a finite, resolvable peak width that eliminates sampling artifacts. It also enables reliable assessment of drive-beam backgrounds. Guided by the predicted optimal angle, CTS experiments at 42° were performed on the Shenguang-100 kJ facility. For the first time, both ion and electron features were simultaneously measured in the hohlraum corona, with the electron signal clearly distinguishable from the background. Joint fitting provides the temporal evolution of electron density and temperature. This work establishes a unified, collision-corrected diagnostic framework that overcomes a long-standing obstacle to measuring electron density and temperature in ICF hohlraum plasmas.

In inertial confinement fusion (ICF), Thomson scattering (TS) is a widely used diagnostic technique for probing plasma conditions. We present a first-principles numerical approach to obtaining scattered light signals of ion acoustic features with high resolution in angle and frequency space using particle-in-cell simulations under typical ICF conditions. Our method demonstrates good agreement with existing theories for thermal collective TS. In the super-thermal collective regime, the results align with theory when the driven plasma modes are well-matched in wave vectors to the probe and collecting beams. Moreover, we also find that TS signals can remain significant even under imperfect wave-vector matching-a result that contradicts the conventional expectation that the TS spectrum strictly follows the plasma density spectrum. We attribute this discrepancy to a beating wave mechanism arising from the interaction between the probe beam and driven plasma density modulations. Our work thus provides a practical framework for interpreting TS signals from driven ion modes, a common yet complex feature in ICF plasmas.

In the field of optical measurement, the inherent edge spectral leakage problem of the Fourier method significantly affects the accuracy of phase extraction. For the velocity measurement scenarios of inertial confinement fusion (ICF) research using a one-dimensional velocity interferometer system for any reflector (VISAR), this issue further undermines the reliability of velocity field calculations. To address this, a data processing method for VISAR image based on four-phase shifting and probability density function (PDF) compensation is proposed in this paper. This method first performs spatial phase-shifting on a single frame original VISAR image to obtain four phase-shifted images with successive phase differences ofπ/2. To compensate for phase-shifting errors introduced during the experimental measurement and phase-shifting process, the standard deviation of the PDF curve is taken as the objective function. An iterative compensation algorithm is employed to adjust the PDF of the wrapped phase to approximate the ideal distribution, thereby determining the compensation amount for phase-shifting errors. Subsequently, the least-squares method is applied to calculate the wrapped phase. Finally, the wrapped phase is unwrapped to obtain the phase distribution of the VISAR image, enabling velocity calculation. The verification results indicate that our method demonstrates robust performance across ideal simulated image, noisy synthetic image, and experimental VISAR image, which is superior to the Fourier method in suppressing edge spectral leakage, providing more reliable data for ICF diagnosis.

In an experiment performed on the Shenguang-III prototype laser facility, collective Thomson scattering (TS) is used to study the spatial growth of stimulated Brillouin scattering (SBS) in a gas-filled hohlraum by detecting the SBS-driven ion acoustic wave. High-quality time-resolved SBS and TS spectra are obtained simultaneously in the experiment, and these are analyzed by a steady-state code based on the ray-tracing model. The analysis indicates that ion–ion collisions may play an important role in suppressing SBS growth in the Au plasma; as a result, the SBS excited in the filled gas region is dominant. In the early phase of the laser pulse, SBS originates primarily from the high-density plasma at the edges of the interaction beam channel, which is piled up by the heating of the interaction beam. Throughout the duration of the laser pulse, the presence of the TS probe beam might mitigate SBS by perturbing the density distribution around the region overlapping with the interaction beam.

Based on the experimental conditions of the Shenguang-100 kJ laser facility, the feasibility and applicability of the deep ultraviolet quintuple-frequency Thomson scattering diagnostics are evaluated, and compared with the widely used quadruple-frequency Thomson scattering, so as to provide a reference for the technical route for high-precision diagnosis of inertial confinement fusion plasmas. The probe beam signal, the drive-beam background, and the bremsstrahlung background are evaluated, and the measurement bands of the Thomson scattering ion spectrum and electron spectrum are discussed respectively. The results show that for the ion spectrum, the signal to-background ratio can be significantly improved by using a quintuple-frequency probe beam. For the red peak of the electron spectrum, whether a quintuple-frequency probe beam or a quadruple-frequency probe beam is used, it is strongly disturbed by the intense background of the drive beam. For the blue peak of the electron spectrum, the drive beam background can be avoided by using a quintuple-frequency probe beam, while the bremsstrahlung background will be significantly enhanced. In general, quintuple-frequency Thomson scattering has significant advantages in the measurement of low atomic number plasmas, but not for high atomic number plasmas.

在神光Ⅲ原型装置上，利用8束三倍频（351.0 nm）激光注入充气黑腔产生大尺度高温等离子体并激发高水平受激布里渊散射（SBS）过程。利用1束四倍频（263.3 nm）探针束和1套广角汤姆逊散射诊断系统，获得了三倍频激光SBS过程驱动的离子声波的超热相干汤姆逊散射（STS）光谱。通过对STS光谱和背向SBS光谱进行联合分析，揭示了SBS的时空演化过程。

介绍了一种非侵入式电压测量的方法,即通过检测带电导体辐射的电场强度,建立转换带电体电场强度到电势的物理通道,产生非侵入感应电势,然后把感应到的电势转换成可测量的采样电流,采样电流再转换成采样电压,并对采样电压进行数字转换、算法分析,以实现非侵入电压的监测功能.通过对该方法进行研究和分析,推导了非侵入带电体导线的电压测量方法、关键参数感知片面积、充放电电流、感知片到带电导体表面之间的距离和带电导体的电压计算公式,计算了感知片面积的实际值.基于该方法提出并设计了一种应用于低压台区的新型非侵入电压测量传感器,该传感器由非侵入式感知探头、非侵入式感知单元电路两部分组成,且具有测量精度高、体积小、安装简单方便等优点,对用电设备影响非常小.此外,通过对样机进行各种环境参数的测试,包括选取产品与外部导线接触时可能存在的不同边界值,模拟温度变化、湿度变化等不同变量,验证了被测导线在不同参数变量和不同环境变量情况下,样机测量出的电压值的准确性.根据不同被测导线,结合实际安装方式得到不同环境下的可能边界值,并在边界值的范围内对样机做各种环境组合试验,试验结果证明了工程样机的有效性.

项目完成了一种可联网音频智能锁及手机终端授权开锁方法,属于智能锁技术领域.在经常出租的房屋安装的锁具,需要房主经常授权不同的人来开锁,租期结束还需要取消授权,特别需要一种成本低廉,操作方便,便于管理的智能锁具.本产品由音频智能锁、位于互联网服务器上的智能锁授权和密码控制系统以及房主手机终端和授权手机终端构成;房主通过房主手机终端APP绑定音频智能锁ID获得对音频智能锁的管理权限,可为该音频智能锁授权多个允许开锁的手机号以及使用的时间期限.

文章建立起基于"物联网锁、声波锁、区块链"租购并举住房共享与分享平台,即打造成一个专业而精准的"租赁同权"下的房屋共享租赁应用项目,将一切可共享的房产资源进行整合梳理,利用共享的方式,以互联网+、区块链技术以及网络平台,布局一个网络互联的共享渠道,用物联网科技使租房、住房在线上线下得到无缝连接,打造基于共享理念的系统平台.

Currently, laboratory created energy density of laser-driven inertial confinement fusion (ICF) is extremely close to that for ignition, while the divergence between experiment and simulation is increasing. One of the key issues is the lack of advanced knowledge of laser-hohlraum coupling process, which has shown the complexity of hohlraum environment. Optical Thomson scattering (OTS) becomes the standard technique for diagnosing the ICF hohlraum plasma parameters, due to its capability of providing unperturbed, local and precise measurement. The development of OTS in China is closely related with the Shenguang series laser facilities, on which most of the ICF experiments are carried out. In recent years, 4ω(263 nm) Thomson scattering technique has been set up on Shenguang-III prototype and 100 kJ-level laser facility, the corresponding results help the understanding of ICF physics. In the near future, several novel methods will be developed, for high-precision diagnostics of ICF ignition hohlraum plasmas and the research of new physical phenomena.

文章通过分析北流市农村集体经营性建设用地入市改革的实践工作及阶段性成效,结合北流市的乡村发展状况,进而分析探讨改革进程对乡村振兴战略的影响,认为:北流市农村集体经营性建设用地入市促进了城乡之间产业要素的流动与组合,促进了乡村产业结构体系的构建,促进了乡村生态文明和物质文明的建设,提高了土地城镇化和人口城镇化的水平.

广西金秀龙围铜矿位于大瑶山多金属成矿带的东部,是石英脉型铜矿床;矿体呈脉状、部分呈透镜体状产于断裂破碎带内的下泥盆统(D1);矿化主要有黄铜矿化、黄铁矿化及辉铜矿化,矿石矿物主要为黄铜矿及辉铜矿.矿床中黄铁矿样品的Re-Os等时线年龄为449±140Ma,结合矿床地质特征,暗示该地区铜矿主要形成于加里东期,也暗示该地区加里东期之后没有明显的岩浆热液活动.

广西方解石矿产资源丰富,其中中—低温热液型方解石矿具有广阔的市场前景,但是该类矿床规模较小,不利于矿山规模化开采,是产业升级的瓶颈.文章在分析方解石的成因和广西方解石特点的基础上,提出促进广西方解石矿规范化、规模化开采的建议.

2014年以来,河池市国土资源局以开展党的群众路线教育实践活动为契机,结合“服务型机关建设年”活动,开展了抓学习促提高、抓制度促规范、抓作风促落实、抓督查促实效的“四抓四促”活动,不断强化机关作风建设,着力解决基层和群众反映强烈的突出问题,机关面貌焕然一新,办事效率大幅提升,工作作风明显好转. 河池市国土资源局在开展“服务型机关建设年”活动过程中,积累了一些好的经验和做法,主要有以下几点: