Early stage expansion and time-resolved spectral emission of laser-induced plasma from polymer

2009 ◽  
Vol 255 (24) ◽  
pp. 9566-9571 ◽  
Author(s):  
Myriam Boueri ◽  
Matthieu Baudelet ◽  
Jin Yu ◽  
Xianglei Mao ◽  
Samuel S. Mao ◽  
...  
Keyword(s):  
Early Stage ◽  
Spectral Emission ◽  
Time Resolved ◽  
Laser Induced Plasma

Correlation between early-stage expansion and spectral emission of a nanosecond laser-induced plasma from organic material

2008 ◽  
Author(s):  
Matthieu Baudelet ◽  
Myriam Boueri ◽  
Jin Yu ◽  
Samuel S. Mao ◽  
Xianglei Mao ◽  
...  
Keyword(s):  
Organic Material ◽  
Early Stage ◽  
Nanosecond Laser ◽  
Spectral Emission ◽  
Laser Induced Plasma

scholarly journals Transient Dynamics Measurement of Light-material Interaction for Laser Optics

2019 ◽  
Vol 215 ◽  
pp. 03005
Author(s):  
Zhichao Liu ◽  
Feng Geng ◽  
Yaguo Li ◽  
Qinghua Zhang ◽  
Jian Wang ◽  
...  
Keyword(s):  
Physical Mechanism ◽  
Early Stage ◽  
Laser Damage ◽  
Time Duration ◽  
Optical Elements ◽  
Time Resolved ◽  
Nanosecond Pulsed Laser ◽  
Laser Induced Damage ◽  
Light Material ◽  
Physical Quantities

Laser damage performance is an important parameter to evaluate the quality of high power laser optical components. Understanding the physical mechanism of the interaction between laser and optical material is of great significance for improving the laser damage resistance of optical elements. For nanosecond pulsed laser, the time duration of laser-induced damage is ultra-short, and the measurement of related physical quantities is very difficult. Therefore, the Time Resolved Pump and Probe (TRPP) technique can effectively solve this problem. TRPP shadow imaging can obtain the transient dynamic information in range of picosecond to microsecond, including the plasma formation in the early stage, the shock wave propagation, the crack expanding, material ejection and other phenomena. Moreover, the ultra-fast physical quantities can be accurately measured by employing two detective beams with perpendicular polarization directions, for example S and P polarization light. All those information provides effective experimental data to reveal the physical mechanism of damage process.

Effect of Different Atmospheres on the Excitation Process of TEA-CO2 Laser-Induced Shock Wave Plasma

1992 ◽  
Vol 46 (4) ◽  
pp. 581-586 ◽  
Author(s):  
H. Kurniawan ◽  
T. Kobayashi ◽  
K. Kagawa
Keyword(s):  
Pulse Width ◽  
Noble Gases ◽  
Tea Co2 Laser ◽  
Total Emission ◽  
Excitation Process ◽  
Time Resolved ◽  
Laser Induced Plasma ◽  
Plasma Characteristics ◽  
Excitation Processes ◽  
Reduced Pressures

The plasma characteristics and excitation process of laser-induced plasma with the use of a TEA CO2 laser of 750 mJ pulse energy and 100 ns pulse width are studied in different surrounding gases at reduced pressures. From the time-resolved spatial distribution, it is clear that in helium and argon atmospheres, two different excitation processes take place in forming the plasma. The first excitation process is due to the blast wave, while the second process is due to the metastable state of the noble gases. It is believed that this second process transfers metastable energy to the vaporized atoms of the target for emission, even long after the laser bombardment ends, thus giving total emission intensity that is higher in the noble gases than in air. The displacement of the front of the emission line under different atmospheres is also presented.

scholarly journals Time-resolved spectroscopic diagnostic of laser-induced plasma on germanium targets

2011 ◽  
Vol 109 (10) ◽  
pp. 103304 ◽  
Author(s):  
J. J. Camacho ◽  
L. Diaz ◽  
J. M. L. Poyato
Keyword(s):  
Time Resolved ◽  
Laser Induced Plasma

scholarly journals Discovery of a New Dwarf Nova, TSS J022216.4+412259.9: a WZ Sge-type Dwarf Nova Breaking the Shortest Superhump Period Record

2006 ◽  
Vol 2 (S240) ◽  
pp. 536-541
Author(s):  
Akira Imada ◽  
Kaori Kubota ◽  
Taichi Kato ◽  
Daisaku Nogami ◽  
Hiroyuki Maehara ◽  
...  
Keyword(s):  
Early Stage ◽  
Plateau Phase ◽  
Dwarf Novae ◽  
Ccd Photometry ◽  
Time Resolved ◽  
Dwarf Nova

AbstractWe report on time-resolved CCD photometry of the newly-discovered dwarf nova, TSS J022216.4+412259.9 during its outburst in 2005 November–December. The best-estimated superhump period was 0.0554 days, which is the shortest superhump period among WZ Sge-type dwarf novae ever known. Double-peaked humps were also detected with a period of 0.05487 days in the early stage of the outburst. A rebrightening exhibited after the end of the plateau phase. All of these observations indicate the WZ Sge nature of the system. We mainly discuss the rebrightening stage of the superoutburst, compared with other WZ Sge-type dwarf novae.

Time resolved spectral emission from AP & AN: comparison with LIBS

2012 ◽  
Author(s):  
Ch. Leela ◽  
Suman Bagchi ◽  
S. Sreedhar ◽  
M. Ashwin Kumar ◽  
Surya P. Tewari ◽  
...  
Keyword(s):  
Spectral Emission ◽  
Time Resolved

Time-resolved EUV spectroscopy in the early stage of laser ablation of carbon

2002 ◽  
Vol 197-198 ◽  
pp. 164-168 ◽  
Author(s):  
Pierre Loiseleur ◽  
Tue N Hansen ◽  
Jean Larour ◽  
James G Lunney
Keyword(s):  
Laser Ablation ◽  
Early Stage ◽  
Time Resolved
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