scholarly journals Progress of the injection laser system of SG-II

2018 ◽  
Vol 6 ◽  
Author(s):  
Wei Fan ◽  
Youen Jiang ◽  
Jiangfeng Wang ◽  
Xiaochao Wang ◽  
Dajie Huang ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Near Field ◽  
Laser System ◽  
High Energy ◽  
Injection Laser ◽  
Inertial Confinement ◽  
Chirped Pulse ◽  
Confinement Fusion ◽  
Chirped Pulse Amplification ◽  
High Power Laser System

A high power laser system was used to drive the ignition of inertial confinement fusion (ICF), of which the high energy, the uniform focal spot, the accurate laser waveform, and the synchronization between the laser beams are key parameters. To accomplish this, global laser characteristics control should be assured, which was the main purpose of the injection laser system. In this paper, the key technological progress involved in the improvement of the performance of the injection laser of SG-II is reported, including frequency domain control, time domain control, near-field spatial shaping, pre-amplifier technology, and the optical parametric chirped pulse amplification pump source.

An intelligent computation system for precise assembly of large laser optics

2018 ◽  
Vol 38 (4) ◽  
pp. 524-535
Author(s):  
Hui Wang ◽  
Zheng Zhang ◽  
Zhao Xiong ◽  
Tianye Liu ◽  
Kai Long ◽  
...  
Keyword(s):  
High Power ◽  
Inertial Confinement Fusion ◽  
Laser System ◽  
Inertial Confinement ◽  
Content Type ◽  
Modeling And Analysis ◽  
Surface Distortion ◽  
Laser Optics ◽  
Confinement Fusion ◽  
High Power Laser System

Purpose It is a huge technical and engineering challenge to realize the precise assembly of thousands of large optics in high power solid-state laser system. Using the 400-mm aperture-sized transport mirror as a case, this paper aims to present an intelligent numerical computation methodology for mounting performance analysis and modeling of large optics in a high-power laser system for inertial confinement fusion (ICF). Design/methodology/approach Fundamental principles of modeling and analysis of the transport mirror surface distortion are proposed, and a genetic algorithm-based computation framework is proposed to evaluate and optimize the assembly and mounting performance of large laser optics. Findings The stringent specifications of large ICF optics place very tight constraints upon the transport mirror’s assembly and mounts. The operational requirements on surface distortion [peak-to-valley and root mean square (RMS)] can be met as it is appropriately assembled by the close loop of assembly-inspection-optimization-fastening. In the end, the experimental study validates the reliability and effectiveness of the transport mirror mounting method. Originality/value In the assembly design and mounting performance evaluation of large laser optics, the whole study has the advantages of accurate evaluation and intelligent optimization on nano-level optical surface distortion, which provides a fundamental methodology for precise assembly and mounting of large ICF optics.

Optical Surface Cleanliness Inspection, Degradation and Maintaining in High Power Laser System

2013 ◽  
Vol 765-767 ◽  
pp. 2288-2293
Author(s):  
Bao Xu Wang ◽  
Mei Cong Wang ◽  
Ming Zhi Zhu ◽  
Xiao Juan Chen ◽  
Wen Kai Wu
Keyword(s):  
High Power ◽  
Inertial Confinement Fusion ◽  
High Energy Physics ◽  
Laser System ◽  
High Energy ◽  
Inertial Confinement ◽  
Optical Surface ◽  
High Power Laser ◽  
Power Laser ◽  
High Power Laser System

High Power Laser System (HPLS) is a large optical instrument, provides extremely high temperature and pressure conditions for inertial confinement fusion (ICF) and high-energy-physics research. It contains large number of optics and which would be easily damaged due to high fluence of laser power. The contamination control of optical surfaces has a great significance to ensure the performance of the system and decrease costs. This paper discussed the background and development of cleanliness control techniques in high power laser systems, including contamination induced laser damage (CILD), contamination inspection, optical surface cleanliness degradation and maintaining.

scholarly journals Free-standing targets for applications to ICF

1999 ◽  
Vol 17 (4) ◽  
pp. 713-727 ◽  
Author(s):  
I.V. ALEKSANDROVA ◽  
E.R. KORESHEVA ◽  
I.E. OSIPOV
Keyword(s):  
Inertial Confinement Fusion ◽  
Laser System ◽  
Inertial Confinement ◽  
High Power Laser ◽  
Power Laser ◽  
Free Standing ◽  
Conceptual Approach ◽  
Polymer Shell ◽  
Confinement Fusion ◽  
High Power Laser System

In conventional inertial confinement fusion (ICF), a high power laser system is used to compress a cryogenic target and create energy. One of the challenges for ICF cryogenics is producing the homogeneous and uniform fuel on the inside surface of a spherical polymer shell. In this report, we will discuss a conceptual approach based on freestanding targets and the results of our recent and current developments.

scholarly journals High energy krypton fluoride amplifiers for laser-induced fusion

1986 ◽  
Vol 4 (1) ◽  
pp. 91-105 ◽  
Author(s):  
J. A. Sullivan ◽  
C. W. von Rosenberg
Keyword(s):  
Power Amplifier ◽  
Inertial Confinement Fusion ◽  
Laser System ◽  
High Energy ◽  
Inertial Confinement ◽  
Fusion Technology ◽  
Double Pass ◽  
Krypton Fluoride ◽  
Confinement Fusion

This paper discusses the general requirements for inertial confinement fusion, technology requirements and choices, overall efficiencies, and laser system costs for scaling krypton fluoride amplifiers to high energy, and describes the design of a 100 kilojoule double-pass KrF power amplifier.

Demonstration of a diode pumped Nd,Y co-doped SrF 2 crystal based, high energy chirped pulse amplification laser system

2017 ◽  
Vol 382 ◽  
pp. 201-204 ◽  
Author(s):  
Junchi Chen ◽  
Yujie Peng ◽  
Zongxin Zhang ◽  
Hongpeng Su ◽  
Yuxin Leng ◽  
...  
Keyword(s):  
Laser System ◽  
High Energy ◽  
Chirped Pulse ◽  
Pulse Amplification ◽  
Chirped Pulse Amplification ◽  
Diode Pumped ◽  
Co Doped

X‐ray spectroscopy of high‐energy density inertial confinement fusion plasmas

1993 ◽  
Vol 5 (9) ◽  
pp. 3328-3336 ◽  
Author(s):  
C. J. Keane ◽  
B. A. Hammel ◽  
D. R. Kania ◽  
J. D. Kilkenny ◽  
R. W. Lee ◽  
...  
Keyword(s):  
Energy Density ◽  
Inertial Confinement Fusion ◽  
High Energy ◽  
High Energy Density ◽  
Inertial Confinement ◽  
Fusion Plasmas ◽  
X Ray ◽  
Confinement Fusion

Inertial Confinement Fusion Using the OMEGA Laser System

2011 ◽  
Vol 39 (4) ◽  
pp. 1007-1014 ◽  
Author(s):  
P B Radha ◽  
R Betti ◽  
T R Boehly ◽  
J A Delettrez ◽  
D H Edgell ◽  
...  
Keyword(s):  
Inertial Confinement Fusion ◽  
Laser System ◽  
Inertial Confinement ◽  
Confinement Fusion ◽  
Omega Laser

scholarly journals OMEGA Upgrade laser for direct-drive target experiments

1993 ◽  
Vol 11 (2) ◽  
pp. 317-321 ◽  
Author(s):  
J.M. Soures ◽  
R.L. McCrory ◽  
T.R. Boehly ◽  
R.S. Craxton ◽  
S.D. Jacobs ◽  
...  
Keyword(s):  
Pulse Shape ◽  
Inertial Confinement Fusion ◽  
Pulse Shaping ◽  
Laser System ◽  
Beam Power ◽  
Power Balance ◽  
Inertial Confinement ◽  
Design Rationale ◽  
Direct Drive ◽  
Confinement Fusion

Validation of the direct-drive approach to inertial confinement fusion requires the development of a 351-nm wavelength, 30-kJ, 50-TW laser system with flexible pulse shaping and irradiation uniformity approaching 1%. An upgrade of the existing OMEGA direct-drive facility at Rochester is planned to meet these objectives. In this article, we review the design rationale and specifications of the OMEGA Upgrade laser with particular emphasis on techniques planned to achieve the required degree of beam smoothing, temporal pulse shape, and beam-to-beam power balance.

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