Experimental Investigation on Damage to Protective Materials of Spacecrafts Caused by Laser-Shockwave-Driven Flyer

Aluminum flyer with thickness of 50μm and diameter of 1mm had been driven successfully by high-power Nd:Glass laser system. Average speed of the flyer was detected by piezoelectric Polyvinylidene Fluoride (PVDF) transducer, which reached 6.67km/s. Extent of damage to protective materials of spacecrafts was studied after they were hit by the driven aluminum flyer. The protective materials of spacecraft were damaged structurally in our experiment, and the damage observed under the microscope was also shown. It could be seen that the flyer knocked a tiny hole with diameter of about 1mm in the protective cellular board, and there were traces of impact damage around the tiny hole, which indicated that protective materials of spacecrafts would be damaged structurally when they were hit by flyer with size of 1mm. At the same time, the hyperspeed flyer still had good integrity and flatness. The results showed that laser-shockwave-driven hyperspeed flyer technology could be used as an effective experiment means to simulate high-speed space particles, which made it feasible to establish a set of simulation device of laser-shockwave-driven hyperspeed flyer for the research of protective materials of spacecrafts on the ground.

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Retrofit of a High Power Nd:Glass Laser System with Liquid Crystal Polarizers

Laser Induced Damage in Optical Materials: 1984 ◽

10.1520/stp23101s ◽

2008 ◽

pp. 15-15-8 ◽

Cited By ~ 1

Author(s):

SD Jacobs ◽

KA Cerqua ◽

TJ Kessler ◽

W Seka ◽

R Bahr

Keyword(s):

Liquid Crystal ◽

High Power ◽

Laser System ◽

Nd:Glass Laser

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A high power Nd:glass laser system for fusion research

IEEE Journal of Quantum Electronics ◽

10.1109/jqe.1974.1068355 ◽

1974 ◽

Vol 10 (9) ◽

pp. 688-689 ◽

Cited By ~ 1

Author(s):

D. Gill ◽

R. Hyer ◽

P. Mace ◽

J. McLeod ◽

J. Perry ◽

...

Keyword(s):

High Power ◽

Laser System ◽

Fusion Research ◽

Nd:Glass Laser

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Analysis of composite stiffener under successive impact and bending test

Journal of Reinforced Plastics and Composites ◽

10.1177/0731684417704076 ◽

2017 ◽

Vol 36 (17) ◽

pp. 1225-1238 ◽

Cited By ~ 4

Author(s):

Muhammad Ridha ◽

Tong-Earn Tay ◽

Sven Werner ◽

Paul Joern ◽

Vincent Beng Chye Tan

Keyword(s):

Experimental Investigation ◽

Impact Strength ◽

Bending Strength ◽

Impact Damage ◽

Experimental Tests ◽

Bending Test ◽

Successful Prediction ◽

Bend Tests ◽

Point Bend ◽

Extent Of Damage

In this article, we present the analysis, modelling and experimental investigation of composite omega stiffeners from non-penetrating impact to bending-after-impact. We used advanced computational methods to determine the extent of damage due to impact and, without many simplifications to the damage, predict the residual bending-after-impact strength under four-point-bend tests. The predicted sizes and patterns of impact damage, and the subsequent predicted bending strengths are compared to experimental tests of omega stiffeners. This work shows that preserving the details and fidelity of damage in the computational model is critical to successful prediction of residual strength. It was also found that modifying the design of the stiffeners by changing the orientation of some of the plies reduces the extent of impact damage and increases residual bending strength.

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Spectrally dispersed amplified spontaneous emission for improving irradiation uniformity into high power Nd:glass laser system

Journal of Applied Physics ◽

10.1063/1.353159 ◽

1993 ◽

Vol 73 (5) ◽

pp. 2122-2131 ◽

Cited By ~ 56

Author(s):

H. Nakano ◽

K. Tsubakimoto ◽

N. Miyanaga ◽

M. Nakatsuka ◽

T. Kanabe ◽

...

Keyword(s):

Spontaneous Emission ◽

High Power ◽

Laser System ◽

Amplified Spontaneous Emission ◽

Nd:Glass Laser

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Partially coherent light generated by using single and multimode optical fibers in a high‐power Nd:glass laser system

Applied Physics Letters ◽

10.1063/1.109955 ◽

1993 ◽

Vol 63 (5) ◽

pp. 580-582 ◽

Cited By ~ 44

Author(s):

H. Nakano ◽

N. Miyanaga ◽

K. Yagi ◽

K. Tsubakimoto ◽

T. Kanabe ◽

...

Keyword(s):

Optical Fibers ◽

High Power ◽

Laser System ◽

Coherent Light ◽

Partially Coherent ◽

Partially Coherent Light ◽

Nd:Glass Laser

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High-power, Joule-class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads

High Power Laser Science and Engineering ◽

10.1017/hpl.2018.68 ◽

2019 ◽

Vol 7 ◽

Cited By ~ 8

Author(s):

Jiangtao Guo ◽

Jiangfeng Wang ◽

Hui Wei ◽

Wenfa Huang ◽

Tingrui Huang ◽

...

Keyword(s):

High Power ◽

Ring Laser ◽

Laser System ◽

High Energy ◽

Fiber Structure ◽

Laser Amplifier ◽

Regenerative Amplifier ◽

Thermally Induced ◽

Diode Pumped ◽

Nd:Glass Laser

A high-power, Joule-class, nanosecond temporally shaped multi-pass ring laser amplifier system with two neodymium-doped phosphate glass (Nd:glass) laser heads is demonstrated. The laser amplifier system consists of three parts: an all-fiber structure seeder, a diode-pumped Nd:glass regenerative amplifier and a multi-pass ring amplifier, where the thermally induced depolarization of two laser heads is studied experimentally and theoretically. Following the injection of a square pulse with the pulse energy of 0.9 mJ and pulse width of 6 ns, a 0.969-J high-energy laser pulse at 1 Hz was generated, which had the ability to change the waveform arbitrarily, based on the all-fiber structure front end. The experimental results show that the proposed laser system is promising to be adopted in the preamplifier of high-power laser facilities.

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High power output stages of a Nd:glass laser system for fusion applications

Applied Optics ◽

10.1364/ao.15.001450 ◽

1976 ◽

Vol 15 (6) ◽

pp. 1450 ◽

Cited By ~ 1

Author(s):

J. N. Burdonsky ◽

E. V. Zhuzhukalo ◽

N. G. Kovalsky ◽

A. N. Kolomliisky ◽

M. I. Pergament ◽

...

Keyword(s):

High Power ◽

Power Output ◽

Laser System ◽

High Power Output ◽

Fusion Applications ◽

Output Stages ◽

Nd:Glass Laser

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Performance analysis of magnetic gear with Halbach array for high power and high speed

International Journal of Applied Electromagnetics and Mechanics ◽

10.3233/jae-209410 ◽

2020 ◽

Vol 64 (1-4) ◽

pp. 959-967

Author(s):

Se-Yeong Kim ◽

Tae-Woo Lee ◽

Yon-Do Chun ◽

Do-Kwan Hong

Keyword(s):

Permanent Magnet ◽

Eddy Current ◽

High Power ◽

High Speed ◽

Torque Ripple ◽

Eddy Current Loss ◽

Element Analysis ◽

Current Loss ◽

Halbach Array ◽

Magnetic Gear

In this study, we propose a non-contact 80 kW, 60,000 rpm coaxial magnetic gear (CMG) model for high speed and high power applications. Two models with the same power but different radial and axial sizes were optimized using response surface methodology. Both models employed a Halbach array to increase torque. Also, an edge fillet was applied to the radial magnetized permanent magnet to reduce torque ripple, and an axial gap was applied to the permanent magnet with a radial gap to reduce eddy current loss. The models were analyzed using 2-D and 3-D finite element analysis. The torque, torque ripple and eddy current loss were compared in both models according to the materials used, including Sm2Co17, NdFeBs (N42SH, N48SH). Also, the structural stability of the pole piece structure was investigated by forced vibration analysis. Critical speed results from rotordynamics analysis are also presented.

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