On the Problem of Thermonuclear Ignition and Burning in the NIF Laser: Ignition with Capsules Taking into Account the Influence of the Hohlraum Radiation on Implosion

2018 ◽  
Vol 127 (4) ◽  
pp. 786-790
Author(s):  
V. B. Rozanov ◽  
G. A. Vergunova
Keyword(s):  
Laser Ignition ◽  
Thermonuclear Ignition

Laser ignition for artillery cannon

2005 ◽  
Author(s):  
Richard A. Beyer
Keyword(s):  
Laser Ignition

Laser Ignition of Surgical Drape Materials in Air, 50% Oxygen, and 95% Oxygen

2004 ◽  
Vol 100 (5) ◽  
pp. 1167-1171 ◽  
Author(s):  
Gerald L. Wolf ◽  
George W. Sidebotham ◽  
Jackson L. P. Lazard ◽  
Jean G. Charchaflieh
Keyword(s):  
Carbon Dioxide ◽  
Operating Room ◽  
Oxygen Concentration ◽  
High Energy ◽  
Ignition Source ◽  
Laser Ignition ◽  
Surgical Tools ◽  
Time To Ignition ◽  
Room Fires ◽  
Surgical Laser

Background Operating room fires fueled by surgical drapes and ignited by high-energy surgical tools in air and oxygen-enriched atmospheres continue to occur. Methods The authors examined the time to ignition of huck towels and three commonly used surgical drape materials in air, 50% oxygen, and 95% oxygen using a carbon dioxide surgical laser as an ignition source. In addition, a phenol-polymer fabric was tested. Results In air, polypropylene and phenol polymer do not ignite. For polypropylene, the laser instantly vaporized a hole, and therefore, interaction between the laser and material ceased. When tested in combination with another material, the polypropylene time to ignition assumed the behavior of the material with which it was combined. For phenol polymer, the laser did not penetrate the material. Huck towels, cotton-polyester, and non-woven cellulose-polyester ignited in air with decreasing times to ignition. All tested materials ignited in 50% and 95% oxygen. Conclusion The results of this study reveal that with increasing oxygen concentration, the time to ignition becomes shorter, and the consequences become more severe. The possibility exists for manufacturers to develop drape materials that are safer than existing materials.

Laser ignition of nickel-aluminum powder systems

1994 ◽  
Vol 30 (2) ◽  
pp. 147-150 ◽  
Author(s):  
M. I. Shilyaev ◽  
V. É. Borzykh ◽  
A. R. Dorokhov
Keyword(s):  
Aluminum Powder ◽  
Laser Ignition ◽  
Nickel Aluminum

Laser ignition of iso-octane and n-heptane jets under compression-ignition conditions

Fuel ◽  
2021 ◽  
pp. 122555
Author(s):  
Guanxiong Zhai ◽  
Sensen Xing ◽  
Anthony C.Y. Yuen ◽  
Paul R. Medwell ◽  
Sanghoon Kook ◽  
...  
Keyword(s):  
Laser Ignition ◽  
Compression Ignition

Spectral-Kinetic Characteristics of Laser Ignition of Pulverized Brown Coal

2018 ◽  
Vol 125 (2) ◽  
pp. 293-299 ◽  
Author(s):  
B. P. Aduev ◽  
D. R. Nurmukhametov ◽  
R. Yu. Kovalev ◽  
Ya. V. Kraft ◽  
A. N. Zaostrovskii ◽  
...  
Keyword(s):  
Brown Coal ◽  
Laser Ignition ◽  
Kinetic Characteristics

scholarly journals Shock Wave Propagation and Flame Kernel Morphology in Laser-Induced Plasma Ignition of CH4/O2/N2 Mixture

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7976
Author(s):  
Junjie Zhang ◽  
Erjiang Hu ◽  
Qunfei Gao ◽  
Geyuan Yin ◽  
Zuohua Huang
Keyword(s):  
Shock Wave ◽  
Oxygen Content ◽  
Equivalence Ratio ◽  
Laser Energy ◽  
Initial Pressure ◽  
Pure Oxygen ◽  
Laser Ignition ◽  
Flame Kernel ◽  
Jones Model ◽  
Kernel Morphology

The application of laser ignition in the aerospace field has promising prospects. Based on the constant volume combustion chamber, the laser ignition of CH4/O2/N2 mixture with different initial pressure, different laser energy, different equivalence ratio and different oxygen content has been carried out. The development characteristics of the flame kernel and shock wave under different conditions are analyzed. In addition, the Taylor model and Jones model are also used to simulate the development process of the shock wave, and a new modified model is proposed based on the Jones model. The experimental results show that under pure oxygen conditions, the chemical reaction rate of the mixture is too fast, which makes it difficult for the flame kernel to form the ring and third-lobe structure. However, the ring structure is easier to form with the pressure and laser energy degraded; the flame kernel morphology is easier to maintain at a rich equivalence ratio, which is caused by the influence of the movement of hot air flow and a clearer boundary between the ring and the third-lobe. The decrease of the initial pressure or the increase of the laser energy leads to the increase in shock wave velocity, while the change of the equivalence ratio and oxygen content has less influence on the shock wave.

scholarly journals Computational optimization of indirect-driven targets for ignition and the engineering test facility

1997 ◽  
Vol 15 (1) ◽  
pp. 145-149 ◽  
Author(s):  
E.N. Avrorin ◽  
V.A. Lykov ◽  
V.E. Chernyakov ◽  
A.N. Shushlebin ◽  
K.A. Mustafin ◽  
...  
Keyword(s):  
Heavy Ion ◽  
High Energy ◽  
Fast Ignition ◽  
Test Facility ◽  
Energy Yield ◽  
Powerful Laser ◽  
Computational Optimization ◽  
Main Driver ◽  
Thermonuclear Ignition

The results of ID-ERA and 2D-TIGR, OMEGA codes calculations of compression and burn of indirect-driven targets for the thermonuclear ignition and Engineering Test Facility are presented. The possibility to obtain high-energy yield of G > 100 with driver energy of Ed = 5−10 MJ by using the heavy-ion one-beam accelerator as the main driver and powerful laser for fast ignition of thermonuclear detonation of cylindrical targets is pointed out.

High-irradiance laser ignition of explosives

2003 ◽  
Vol 175 (8) ◽  
pp. 1551-1571 ◽  
Author(s):  
A. N. Ali ◽  
S. F. Son ◽  
B. W. Asay ◽  
M. E. Decroix ◽  
M. Q. Brewster
Keyword(s):  
High Irradiance ◽  
Laser Ignition
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