scholarly journals A pulsed-power implementation of “Laser Gate” for increasing laser energy coupling and fusion yield in magnetized liner inertial fusion (MagLIF)

2020 ◽  
Vol 91 (6) ◽  
pp. 063507
Author(s):  
S. M. Miller ◽  
S. A. Slutz ◽  
S. N. Bland ◽  
S. R. Klein ◽  
P. C. Campbell ◽  
...  
Keyword(s):  
Laser Energy ◽  
Energy Coupling ◽  
Pulsed Power ◽  
Inertial Fusion ◽  
Fusion Yield

Temporal Pulse Shaping and Optimization in Ultrafast Laser Ablation of Materials

2003 ◽  
Vol 780 ◽  
Author(s):  
R. Stoian ◽  
S. Winkler ◽  
M. Hildebrand ◽  
M. Boyle ◽  
A. Thoss ◽  
...  
Keyword(s):  
Pulse Shaping ◽  
Laser Energy ◽  
Energy Coupling ◽  
Laser Pulses ◽  
Ultrafast Laser ◽  
Ultrashort Laser Pulses ◽  
Adaptive Optimization ◽  
Ultrafast Laser Pulses ◽  
Energy Delivery ◽  
Optimal Processing

The possibility of phase manipulation and temporal tailoring of ultrashort laser pulses enables new opportunities for optimal processing of materials. Phase-manipulated ultrafast laser pulses allow adapting the laser energy delivery rate to the material properties for optimal processing laying the groundwork for adaptive optimization in materials structuring. Different materials respond with specific reaction pathways to the sudden energy input depending on the efficiency of electron generation and on the ability to release the energy into the lattice. The sequential energy delivery with judiciously chosen pulse trains may induce softening of the material during the initial steps of excitation and change the energy coupling for the subsequent steps. We show that this can result in lower stress, cleaner structures, and allow for a materialdependent optimization process.

scholarly journals Enhanced laser-energy coupling to dense plasmas driven by recirculating electron currents

2018 ◽  
Vol 20 (3) ◽  
pp. 033021 ◽  
Author(s):  
R J Gray ◽  
R Wilson ◽  
M King ◽  
S D R Williamson ◽  
R J Dance ◽  
...  
Keyword(s):  
Laser Energy ◽  
Energy Coupling ◽  
Dense Plasmas

Numerical study of the effect of laser-arc distance on laser energy coupling in pulsed Nd: YAG laser/TIG hybrid welding

2016 ◽  
Vol 91 (1-4) ◽  
pp. 1129-1143 ◽  
Author(s):  
Jie Ning ◽  
Lin-Jie Zhang ◽  
Suck-Joo Na ◽  
Xian-Qing Yin ◽  
Jing Niu ◽  
...  
Keyword(s):  
Laser Energy ◽  
Numerical Study ◽  
Energy Coupling ◽  
Hybrid Welding ◽  
Yag Laser ◽  
Arc Distance

scholarly journals Summary (I). Experiments

1987 ◽  
Vol 5 (3) ◽  
pp. 549-550
Author(s):  
J. Pace Vandevender
Keyword(s):  
Pulse Shaping ◽  
Impedance Control ◽  
Pulsed Power ◽  
Inertial Fusion ◽  
Channel Formation ◽  
Gas Switch ◽  
Considerable Work ◽  
Further Development ◽  
Kinetics Of ◽  
Target Design

The conference has shown some important advances toward the solution of problems required for inertial fusion. We can tentatively categorize as solved, or nearly solved, the following problems: Marx prefires, Marx jitter, gas-switch prefires, gas-switch jitter, power combination of multi-modules, high-current beam divergence (in barreltype, Applied-B/MID diodes), and preheat. In addition, there are a set of mature problems with promising solutions: pulsed power accelerator efficiency, ion sources, and the electron kinetics of an extractor ion diode. Newer problems that were addressed at the meeting but still require considerable work include: impedance control of efficient ion diodes, diagnostics for both beams and targets, the further development of target design tools and their experimental verification, targetfabrication processes to make the nearly perfect targets required for inertial fusion, channel formation and beam transport in those channels at the power levels required for fusion, and pulse-shaping.

scholarly journals Scaling magnetized liner inertial fusion on Z and future pulsed-power accelerators

2016 ◽  
Vol 23 (2) ◽  
pp. 022702 ◽  
Author(s):  
S. A. Slutz ◽  
W. A. Stygar ◽  
M. R. Gomez ◽  
K. J. Peterson ◽  
A. B. Sefkow ◽  
...  
Keyword(s):  
Pulsed Power ◽  
Inertial Fusion

scholarly journals An Analytical Model for Estimating the Bending Curvatures of Metal Sheets in Laser Peen Forming

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 462
Author(s):  
Yunxia Ye ◽  
Zeng Nie ◽  
Xu Huang ◽  
Xudong Ren ◽  
Lin Li
Keyword(s):  
Analytical Model ◽  
Laser Energy ◽  
Stress Gradient ◽  
Energy Coupling ◽  
Complex Stress ◽  
Force Balance ◽  
Thin Plates ◽  
Forming Process ◽  
2024 Aluminum Alloy ◽  
Peen Forming

Laser peen forming (LPF) is suitable for shaping sheet metals without the requirement for die/mold and without causing high temperatures. An analytical model for estimating the bending curvatures of LPF is convenient and necessary for better understanding of the physical processes involved. In this paper, we describe a new analytical model based on internal force balance and the energy transformation in LPF. Experiments on 2024 aluminum alloy sheets of 1–3 mm thickness were performed to validate the analytical model. The results showed that for 1 mm and 3 mm thick–thin plates, the curvature obtained by the analytical model changes from −14 × 10−4 mm−1 and −1 × 10−4 mm−1 to 55 × 10−4 mm−1 and −21 × 10−4 mm−1, respectively, with the increase of laser energy, which is consistent with the experimental trend. So, when either the stress gradient mechanism (SGM) or the shock bending mechanism (SBM) overwhelmingly dominated the forming process, the analytical model could give relatively accurate predicted curvatures compared with the experimental data. Under those conditions where SGM and SBM were comparable, the accuracy of the model was low, because of the complex stress distributions within the material, and the complex energy coupling process under these conditions.

Incandescence Measurement During CO2 Laser Texturing of Silicate Glass

2000 ◽  
Vol 123 (2) ◽  
pp. 376-381 ◽  
Author(s):  
Lei Li ◽  
Ted D. Bennett
Keyword(s):  
Laser Energy ◽  
Heated Surface ◽  
Energy Coupling ◽  
Laser Pulses ◽  
Fictive Temperature ◽  
Emission Data ◽  
New Approach ◽  
Glass Substrates ◽  
Short Time ◽  
Laser Heated

Laser zone texture is a new approach to improve tribology performance of high aerial density disks made with glass substrates. In this process, nanotexture is introduced to the surface by discrete laser pulses. The topography change is due to the elevation of fictive temperature in the short time and high temperature scales that occur through the laser energy coupling with glass. To exercise better control over this thermal process, knowing the temperature field induced by the laser pulse and the timescale of the thermal cycle are very important. In this paper, emission measurements are made from a laser-heated surface of approximately 300 μm2 and temporally resolved to 100 ns. Several emission bands are collected in the visible. From emission data, the extensive heat capacity of the heat affected zone is derived, allowing peak surface temperatures to be determined from the pulse energy. Experimental results are compared with a numerical model to determine the validity of earlier calculations and conclusions.

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