共查询到20条相似文献,搜索用时 15 毫秒
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S. P. Obenschain 《Journal of Fusion Energy》1998,17(3):219-220
In collaboration with other laboratories, we are beginning a program to study and demonstrate the scientific, technical and economic feasibility of power production using laser fusion. The program, based on the development of a high average power Krypton Fluoride laser, is described in this paper. 相似文献
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Chuan Wang Xia ZhengJian-zhong Wang Tian-jue Zhang 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2011,269(24):2941-2945
The low impedance compact pulsed power generators are considered as potential drivers for X-pinch based phase contrast imaging and extreme ultraviolet (EUV) source for lithography. The designed pulsed power generator should provide square-like wave on low impedance load (1-2 Ω) with current amplitude of 100 kA in burst mode. The pulse width of the current wave is 60 ns, and the rise time of the wave should be less than 30 ns. The dimensions of the machine are restricted to be no larger than ∼2 × 1 × 1.5 m, according to the specific potential application of the machine. We adopted a solution based on Marx generator combined with low impedance pulse forming line and V/N type gas switch technology to obtain the required high intensity and fast rise-time current wave. Special efforts have been made to reduce the inductance of V/N switch and low impedance load section, and thus to obtain fast rise time and high peak current, during both physical and mechanical design stages. The high power transient signal diagnostic system, consisting of a capacitive voltage divider and a metal film based current monitor, and the calibration of the diagnostic system are also outlined. 相似文献
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本文提出了二种结构新型的大功率电子束扫描电路,能够将扫描均匀度提高到90%以上。可用于能量20MeV以下的各种电子束加速器。 相似文献
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Diode-Pumped Solid-State Lasers for Inertial Fusion Energy 总被引:5,自引:0,他引:5
S. A. Payne C. Bibeau R. J. Beach A. Bayramian J. C. Chanteloup C. A. Ebbers M. A. Emanuel H. Nakana C. D. Orth J. E. Rothenberg K. I. Schaffers L. G. Seppala J. A. Skidmore S. B. Sutton L. E. Zapata H. T. Powell 《Journal of Fusion Energy》1998,17(3):213-217
We have begun building the Mercury laser system as the first in a series of new generation diode-pumped solid-state lasers for inertial fusion research. Mercury will integrate three key technologies: diodes, crystals, and gas cooling, within a unique laser architecture that is scalable to kilojoule and megajoule energy levels for fusion energy applications. The primary near-term performance goals include 10% electrical efficiencies at 10 Hz and 100J with a 2–10 ns pulse length at 1.047 m wavelength. When completed, Mercury will allow rep-rated target experiments with multiple chambers for high energy density physics research. 相似文献
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John Pucadyil Ronald Kirkpatrick Richard Post Norman Rostoker Julio Herrera Diethelm F. Düchs Edward Creutz Hans Schneider-Muntau Erick Lindman Reece Roth 《Journal of Fusion Energy》2005,24(1-2):115-123
The Fifth Symposium on Current Trends in International Fusion Research was held on 24–29 March 2003 in Washington, USA in
co-operation with the International Atomic Energy Agency (IAEA). Well-known scientists in their field of interest in fusion
research were invited to present review papers. The presentations covered a broad range of fusion topics, including inertial
confinement fusion, electrostatic confinement, various magnetic confinement schemes, and hybrid schemes. Each session chairman
composed a session report, which John Pucadyil used to create this Report on the Fifth Symposium. 相似文献
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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
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Stephen E. Bodner 《Journal of Fusion Energy》1981,1(3):221-240
Progress toward high laser fusion can be measured by a set of five critical elements. They are: (1) the laser-to-fuel coupling efficiency, (2) the cold fuel isentrope, (3) the implosion symmetry, (4) the ablation pressure, and (5) the ignition concept. 相似文献
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SHUXiaojian 《核技术(英文版)》1999,10(3):165-167
A new kind of MOPA configuration to obtain a high power free-electron laser with very narrow line-width that can satisfy the requirements of some applications such as the laser isotope separation has been proposed.which is investigated by onedimension simulations. 相似文献
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质子治疗装置脉冲电源研制 总被引:2,自引:0,他引:2
上海质子治疗装置项目中质子注入系统凸轨磁铁需要脉冲电源励磁,要求两台电源脉冲峰值幅度可调和波形一致,且运行可靠。本文介绍了凸轨磁铁脉冲电源的设计和测试。脉冲电源电路采用LC串联谐振作为脉冲成形发生电路,电路设计可调电感用于调整波形脉宽。晶闸管为电流开关,快恢复二极管串联晶闸管弥补大功率晶闸管的关断延迟和下冲,并增加饱和电抗器抑制励磁电流反向电流尖峰。测试结果表明,当励磁电流峰值为3 732 A时,励磁电流触发抖动小于±25 ns,励磁电流峰值重复稳定度小于0.1%,反向电流尖峰下降为峰值电流的3.75%,快恢复二极管和饱和电感器对抑制励磁电流反冲的效果明显,满足了设计要求。 相似文献
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《等离子体科学和技术》2015,17(10):842-846
The re-emitted images of the frame camera indicated that the high-Z(Bi) capsule deviated about 29 μm from the center of the hohlraum in experiments at the Shenguang-II(SG-II)laser facility; however, investigations on this issue have seldom been performed. The influence of three dimensional offsets of a capsule on its radiation asymmetry in inertial confinement fusion(ICF) will be analyzed in this paper. Simulations demonstrate that the axial offset of 100 μm of a capsule from the center of the hohlraum brings an additional 3.5% radiation drive asymmetry and 6.5% P_1 asymmetry(Legendre odd model) on the capsule in the SG-II laser facility, and the offset must be within 25 μm if the P_1 asymmetry is restricted to below 2%. 相似文献
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新型高效靶丸结构设计中,内爆靶表面引入某些有机双层薄膜结构可使部分能量沿薄膜的平面传输,使其对称压缩靶丸,实现高效的内爆。文章在PS平面靶表面蒸镀双层功能薄膜,薄膜为8-羟基喹啉铝(Alq3)/酞菁(H2Pc)或苯并咪唑苝(PV)/H2Pc。并对其进行了荧光光谱分析和激光烧蚀实验。研究表明:双层薄膜Alq3/H2Pc和PV/H2Pc产生很强的荧光淬灭;由于该结构横向传输载流子的光电特性,Alq3/H2Pc和PV/H2Pc在很大程度上减弱了PS薄膜的烧蚀,且烧蚀面积分别为无涂层PS薄膜烧蚀面积的8倍和3倍。为新型高效惯性约束聚变靶的设计开发提供了一种新颖的靶丸结构。 相似文献
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Electromagnetic pulses(EMPs)with high intensity and frequency bandwidth can be generated during the intensive laser irradiating solid targets in inertial confinement fusion(ICF).To shield the EMPs radiation and hence protect various diagnostics in and outside the target chamber,we designed a multi-layer structure material to shield the EMFs and demonstrate experimentally and numerically shielding performance of the material structure.The thickness of the multi-layer structure material has a great influence on the EMPs shielding.It is shown that,with the increase of the material thickness,the better shielding performance is obtained,and the material structure with polytetrafluoroethyIene of 0.5 mm,copper of 0.4 mm and lead of 2.4 mm reduces 448 times compared the maximum value of EMPs voltage to that without shielded.The design of multilayer structure material for EMPs shielding provides a promising way to reduce EMPs radiation,which is extremely useful for the diagnostics protection and signal processing in ICF. 相似文献
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The 2002 Fusion Summer Study was conducted July 8–19, 2002, in Snowmass, CO, and carried out a critical assessment of major next steps in the fusion energy sciences program in both magnetic fusion energy (MFE) and inertial fusion energy (IFE). The conclusions of this study were based on analysis led by over 60 conveners working with hundreds of members of the fusion energy sciences community extending over eight months. This effort culminated in two weeks of intense discussion by over 250 U.S. and 30 foreign fusion physicists and engineers present at the 2002 Fusion Summer Study. This is the Executive Summary of the study report. Details are posted at http://web.gat.com/snowmass 相似文献
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《等离子体科学和技术》2016,18(10):1044-1048
Significant electromagnetic pulses(EMP) can be generated by the intensive laser irradiating solid targets in inertial confinement fusion(ICF). To evaluate the EMP intensity and distribution in and outside the laser chamber, we designed and fabricated a discone antenna with ultra-wide bands of over 10 GHz. The return loss(S11parameter) of this antenna was below-10 d B and could even achieve under-30 d B at 3.1 GHz. The EMP intensity in this study at80 cm and 40 cm away from the target chamber center(TCC) reached 400 k V/m and 2000 k V/m.The current results are expected to offer preliminary information to study physics regarding laser plasma interactions and will also lay experimental foundation for EMI shielding design to protect various diagnostics. 相似文献
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John Sheffield Mohamed Abdou Richard Briggs James Callen John Clarke Harold Forsen Katherine Gebbie Ingo Hoffman John Lindl Earl Marmar William Nevins Marshall Rosenbluth William Tang Ernest Valeo 《Journal of Fusion Energy》1999,18(4):195-211
This report presents the results and recommendations of the U. S. Department of Energy Fusion Energy Advisory Committee (FEAC) review of its Inertial Fusion Energy (IFE) program. The subpanel charged with the review was chaired by John Sheffield of Oak Ridge National Laboratory. The FEAC, to which the subpanel reported, was chaired by Robert Conn of the University of California at San Diego. 相似文献