共查询到18条相似文献,搜索用时 46 毫秒
1.
2.
惯性约束聚变靶材料掺杂技术综述 总被引:5,自引:0,他引:5
文章概要综述了惯性约束聚变掺杂靶材料的制备方法,内容包括聚苯乙烯掺卤素和过渡金属元素,玻璃与塑料掺簇粒子,以及塑料涂层掺高Z金属等。简述了掺杂材料的分析测试手段及其在ICF中的应用。 相似文献
3.
4.
介绍了激光惯性约束聚变(LICF)中的氘(D)、氚(T)热核燃料核自旋极化的基本原理,综述了这一课题的进展情况。讨论了动态核极化理论在氘氚(DT)核极化中的固体效应、自旋温度效应以及速率方程,并说明了在激光惯性约束聚变反应堆研究中采用极化的氘氚热核燃料所带来的利益,提出了今后该课题将继续研究的几个问题。 相似文献
5.
6.
7.
8.
惯性约束聚变用聚酰亚胺靶丸的研究进展 总被引:1,自引:0,他引:1
综述了近年来国内外在惯性约束聚变实验用聚酰亚胺(PI)靶丸方面的研究与应用进展情况.从ICF实验用靶的性能要求、常用PI的化学结构、PI靶丸的装配方法以及目前PI靶丸应用过程中存在的问题等几个方面进行了论述.在此基础上提出了PI靶丸的研究方向. 相似文献
9.
10.
11.
12.
《等离子体科学和技术》2020,22(8):84003
Implosion asymmetry is a crucial problem quenching ignition in the field of inertial confinement fusion. A forward-calculation method based on 1 D and 2 D hydrodynamic simulations has been developed to generate and study the x-ray images of hot-spot self-emission, indicating asymmetry integrated over the entire drive pulse. It is shown that the x-ray imaging photon energy should be higher to avoid the influence of the remaining shell. The contour level(percentage of the maximum emission intensity) and spatial resolution should be as low as possible, optimally less than 20% and 3 mm, for characterization of higher-mode signatures such as P_8–P_(12) by x-ray self-emission images. On the contrary, signatures of lower-mode such as P_2 remain clear at all contour levels and spatial resolutions. These key results can help determine the optimal diagnostics, laser, and target parameters for implosion experiments. Recent typical hot-spot asymmetry measurements and applications on the Shenguang 100 kJ class laser facility are also reported. 相似文献
13.
J. Alvarez R. Gonzalez-Arrabal A. Rivera E. Del Rio D. Garoz E.R. Hodgson F. Tabares R. Vila M. Perlado 《Fusion Engineering and Design》2011,86(9-11):1762-1765
This work aims at identifying common potential problems that future fusion devices will encounter for both magnetic and inertial confinement approaches in order to promote joint efforts and to avoid duplication of research. Firstly, a comparison of radiation environments found in both fusion reaction chambers will be presented. Then, wall materials, optical components, cables and electronics will be discussed, pointing to possible future areas of common research. Finally, a brief discussion of experimental techniques available to simulate the radiation effect on materials is included. 相似文献
14.
Inertial confinement fusion power plants will deposit high energy X-rays onto the outer surfaces of the first wall many times a second for the lifetime of the plant. These X-rays create brief temperature spikes in the first few microns of the wall, which cause an associated highly compressive stress response on the surface of the material. The periodicity of this stress pulse is a concern due to the possibility of fatigue cracking of the wall. We have used finite element analyses to simulate the conditions present on the first wall in order to evaluate the driving force of crack propagation on fusion-facing surface cracks.Analysis results indicate that the X-ray induced plastic compressive stress creates a region of residual tension on the surface between pulses. This tension film will likely result in surface cracking upon repeated cycling. Additionally, the compressive pulse may induce plasticity ahead of the crack tip, leaving residual tension in its wake. However, the stress amplitude decreases dramatically for depths greater than 80–100 μm into the fusion-facing surface. Crack propagation models as well as stress-life estimates agree that even though small cracks may form on the surface of the wall, they are unlikely to propagate further than 100 μm without assistance from creep or grain erosion phenomena. 相似文献
15.
Zifeng SONG Bin ZHU Yunqing XIAO Tao XU Zhongjie LIU Yuchi WU Xiayu ZHAN Tao YI Jiabin CHEN Qi TANG 《等离子体科学和技术》2021,23(1):15201-45
In this work, the gas-Cherenkov detector with an off-axis parabolic reflector(Opr GCD) is designed using the Geant4 Monte Carlo simulation toolkit, which is helpful to improve the collection efficiency of Cherenkov photons. The method to study the performance of Opr GCD based on femtosecond laser-wakefield-accelerated electron beams is presented. Cherenkov signals with high signal-to-noise ratio were obtained, and the measured Cherenkov signals changing with the CO2 pressure were consistent well with the simulation results. The design and study of this Opr GCD system lay the foundation for the application of fusion gamma diagnostics system in large laser facilities of China. 相似文献
16.
The redistribution of deuterium (DD) or of a deuterium-tritium mixture (DT) to form a layer on the inside of spherical inertial confinement fusion (ICF) capsules is a challenging problem because of the symmetry requirements of the fuel layer thickness, the smoothness requirement of the inside target surface, and the time restriction on the production process. Heat- and mass-transfer processes have been identified to interact with one another to influence the outcome of the layering process. For example, the mass redistribution speed of the fuel inside the shell towards a uniform layer and the final layer thickness uniformity depend on the variation in local heat transfer coefficient along the outer target surface.The focus of this work was to develop a numerical tool to help understand the physics involved in the layering process to be able to assess the influence of key parameters on the transient layer formation. The coupled mass and heat transfer processes governing target layering have been studied numerically, implementing unique boundary conditions to track the movement of the gas-solid boundary on the inside of the shell.The model was validated through comparison with theoretical results and laboratory-scale experiments. With this model, a window of parameters can by identified, under which layering experiments are likely to be successful. 相似文献
17.
18.
Gianfranco Caruso Fabio Giannetti Maria Teresa Porfiri 《Fusion Engineering and Design》2013,88(12):3263-3271
The CONSEN (CONServation of ENergy) code is a fast running code to simulate thermal-hydraulic transients, specifically developed for fusion reactors. In order to demonstrate CONSEN capabilities, the paper deals with the accident analysis of the magnet induced confinement bypass for ITER design 1996. During a plasma pulse, a poloidal field magnet experiences an over-voltage condition or an electrical insulation fault that results in two intense electrical arcs. It is assumed that this event produces two one square meters ruptures, resulting in a pathway that connects the interior of the vacuum vessel to the cryostat air space room. The rupture results also in a break of a single cooling channel within the wall of the vacuum vessel and a breach of the magnet cooling line, causing the blow down of a steam/water mixture in the vacuum vessel and in the cryostat and the release of 4 K helium into the cryostat. In the meantime, all the magnet coils are discharged through the magnet protection system actuation. This postulated event creates the simultaneous failure of two radioactive confinement barrier and it envelopes all type of smaller LOCAs into the cryostat. Ice formation on the cryogenic walls is also involved. The accident has been simulated with the CONSEN code up to 32 h. The accident evolution and the phenomena involved are discussed in the paper and the results are compared with available results obtained using the MELCOR code. 相似文献