Moderation of near-field pressure over a supersonic flight model using laser-pulse energy deposition

2016 ◽  
Vol 28 (5) ◽  
pp. 051701 ◽  
Author(s):  
D. Furukawa ◽  
Y. Aoki ◽  
A. Iwakawa ◽  
A. Sasoh
Keyword(s):  
Laser Pulse ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Laser Pulse Energy ◽  
Near Field ◽  
Supersonic Flight ◽  
Flight Model

Ultrashort laser pulse energy deposition in metal films with phase changes

2011 ◽  
Vol 98 (19) ◽  
pp. 191105 ◽  
Author(s):  
Yunpeng Ren ◽  
J. K. Chen ◽  
Yuwen Zhang ◽  
Jing Huang
Keyword(s):  
Laser Pulse ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Ultrashort Laser Pulse ◽  
Laser Pulse Energy ◽  
Metal Films ◽  
Phase Changes ◽  
Ultrashort Laser

Impacts of Repetitive Laser Pulse Energy Deposition on Supersonic Intakes

2019 ◽  
Author(s):  
Akihiro Sasoh ◽  
Manabu Myokan ◽  
Akiya Kubota ◽  
Kazuhiro Maeda ◽  
Yen-Lin Wu
Keyword(s):  
Laser Pulse ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Laser Pulse Energy

scholarly journals Suppression of Low-Frequency Shock Oscillations over Boundary Layers by Repetitive Laser Pulse Energy Deposition

Aerospace ◽  
2016 ◽  
Vol 3 (2) ◽  
pp. 13 ◽  
Author(s):  
Akira Iwakawa ◽  
Tatsuro Shoda ◽  
Hoang Pham ◽  
Takahiro Tamba ◽  
Akihiro Sasoh
Keyword(s):  
Laser Pulse ◽  
Boundary Layers ◽  
Pulse Energy ◽  
Energy Deposition ◽  
Laser Pulse Energy ◽  
Low Frequency

Ultrahigh laser pulse energy and power generation at 10 kHz

2012 ◽  
Vol 37 (15) ◽  
pp. 3231 ◽  
Author(s):  
Frederik Fuest ◽  
Michael J. Papageorge ◽  
Walter R. Lempert ◽  
Jeffrey A. Sutton
Keyword(s):  
Power Generation ◽  
Laser Pulse ◽  
Pulse Energy ◽  
Laser Pulse Energy

Intelligent Attenuator For Laser Pulse Energy And Power Stabilization

1983 ◽  
Author(s):  
Malcolm S. White ◽  
Raymond W. Wyatt ◽  
Anthony G. Brett
Keyword(s):  
Laser Pulse ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Power Stabilization

scholarly journals Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1423 ◽  
Author(s):  
Dongkyoung Lee
Keyword(s):  
Laser Pulse ◽  
Pulse Duration ◽  
Pulse Energy ◽  
Laser Pulse Energy ◽  
Laser Spot ◽  
Main Body ◽  
Crater Size ◽  
Stamping Process ◽  
Cut Quality ◽  
Mechanical Cutting

An inspection process using a Spring Contact Probe (SCP) is an essential step in the semiconductor-manufacturing process. Many plungers, which are the main body of the SCP, are manufactured by a stamping process. After the stamping process, mechanical cutting is applied and the plunger body may be damaged. Thus, to improve cut quality and productivity while minimizing body damage, laser spot cutting can be used. To fully utilize this technology, it is necessary to investigate interaction characteristics of beryllium copper (BeCu) during laser spot cutting. Effects of a total irradiated laser-pulse energy (1 mJ ~1000 mJ ) and pulse duration (100 ns ~8 ns ) on the material-removal zone, thermal depth, and crater size are examined. The crater size can be affected by the localization of heating dominantly. An incubation model is applied to investigate the correlation between crater size and laser-pulse energy. Surface morphology characteristics such as edge separation, small particles, spatter motion, and soaring-up motion are observed.

Study on Laser Welding of Phone Nuts

2013 ◽  
Vol 815 ◽  
pp. 778-781
Author(s):  
Xiao Hong Wu
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Laser Pulse ◽  
Laser Welding ◽  
Pulse Energy ◽  
Pulse Width ◽  
Peak Power ◽  
Laser Pulse Energy ◽  
304 Stainless Steel ◽  
Power Pulse

Used YAG pulse laser to weld 304 stainless steel nuts, studied about the parameters such as peak power, pulse width, defocus distance impacting on the performance of the joints welded by laser. The studies showed that the tensile strength and torque of the nuts increased as the peak power and the pulse width increased.Burn through in welding easy occur when laser pulse energy is too big, pulse width is too wide or defocus distance is too low.

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