scholarly journals Dynamic particle removal by nanosecond dry laser cleaning: theory

2002 ◽  
Author(s):  
Nikita Arnold ◽  
G. Schrems ◽  
T. Muehlberger ◽  
M. Bertsch ◽  
Mario Mosbacher ◽  
...  
Keyword(s):  
Laser Cleaning ◽  
Particle Removal

The Simulation of Laser Cleaning of Magnetic Head with Different Temporal Pulses

2015 ◽  
Vol 1101 ◽  
pp. 446-452 ◽  
Author(s):  
Narongpun Rungcharoen ◽  
Mongkol Wannapapra ◽  
Wanchai Pijitrojana
Keyword(s):  
Hard Disk Drives ◽  
Disk Surface ◽  
Laser Cleaning ◽  
User Requirements ◽  
Particle Removal ◽  
Disk Drives ◽  
Magnetic Head ◽  
Small Particles ◽  
Fly Height ◽  
Non Destructive

Nowadays, hard disk drives (HDD) technology are being developed continuously in order to increase the capacity, and reduce the size of HDD to meet user requirements. To increase the capacity which is equivalent to increasing read/write ability, the flying clearance must be reduced. Current new HDD models show that the fly height is lower than 0.3 μm. If the height of a particle or contamination is higher than 0.3 μm, the magnetic head will scratch the magnetic disk surface. However the process of cleaning in the HDD industry cannot remove particles with size smaller than 0.3 μm [1]. Therefore laser cleaning is selected first because this method can remove small particles [2]. and it does not damage the magnetic head. This research compares the range of temperature needed for cleaning the magnetic head between two types of heat source’s profile. The technique used is the heat transfer by finite element: FEM[3]. This technique provides an important factor of the laser cleaning method that increases the efficiency of particle removal. It is also a non-destructive method for cleaning the surface of the magnetic head slider.

Investigation of Particle Removal from Silicon Surfaces by Means of Dry and Steam Laser Cleaning

2003 ◽  
Vol 92 ◽  
pp. 133-134 ◽  
Author(s):  
P. Leiderer ◽  
M. Mosbacher ◽  
J. Boneberg ◽  
C. Bartels ◽  
F. Lang ◽  
...  
Keyword(s):  
Laser Cleaning ◽  
Silicon Surfaces ◽  
Particle Removal

The E-ring: interactions with plasma and implications for its evolution

1984 ◽  
Vol 75 ◽  
pp. 599-602
Author(s):  
T.V. Johnson ◽  
G.E. Morfill ◽  
E. Grun
Keyword(s):  
Time Scale ◽  
Particle Density ◽  
High Energy ◽  
Particle Removal ◽  
Density Region ◽  
Drag Forces ◽  
Orbit Evolution ◽  
History Of ◽  
Ring Particle ◽  
Ring Material

A number of lines of evidence suggest that the particles making up the E-ring are small, on the order of a few microns or less in size (Terrile and Tokunaga, 1980, BAAS; Pang et al., 1982 Saturn meeting; Tucson, AZ). This suggests that a variety of electromagnetic and plasma affects may be important in considering the history of such particles. We have shown (Morfill et al., 1982, J. Geophys. Res., in press) that plasma drags forces from the corotating plasma will rapidly evolve E-ring particle orbits to increasing distance from Saturn until a point is reached where radiation drag forces acting to decrease orbital radius balance this outward acceleration. This occurs at approximately Rhea's orbit, although the exact value is subject to many uncertainties. The time scale for plasma drag to move particles from Enceladus' orbit to the outer E-ring is ~104yr. A variety of effects also act to remove particles, primarily sputtering by both high energy charged particles (Cheng et al., 1982, J. Geophys. Res., in press) and corotating plasma (Morfill et al., 1982). The time scale for sputtering away one micron particles is also short, 102 - 10 yrs. Thus the detailed particle density profile in the E-ring is set by a competition between orbit evolution and particle removal. The high density region near Enceladus' orbit may result from the sputtering yeild of corotating ions being less than unity at this radius (e.g. Eviatar et al., 1982, Saturn meeting). In any case, an active source of E-ring material is required if the feature is not very ephemeral - Enceladus itself, with its geologically recent surface, appears still to be the best candidate for the ultimate source of E-ring material.

Investigation of acoustic monitoring in the laser cleaning of copper

1997 ◽  
Author(s):  
J. M. Lee ◽  
K. G. Watkins ◽  
A. Kearns ◽  
W. M. Steen ◽  
J. D. Ryan ◽  
...  
Keyword(s):  
Acoustic Monitoring ◽  
Laser Cleaning

On Path Generation Method for Laser Cleaning Robot Based on Line Structured Light

2020 ◽  
Author(s):  
Qingzeng Ma ◽  
Dongbin Zhang ◽  
Shuo Jin ◽  
Yuan Ren ◽  
Wei Cheng ◽  
...  
Keyword(s):  
Structured Light ◽  
Laser Cleaning ◽  
Path Generation ◽  
Cleaning Robot ◽  
On Line

Laser cleaning experiences on sculptures’ materials: terracotta, plaster, wood, and wax

2013 ◽  
Author(s):  
Claudia Pelosi ◽  
D. Fodaro ◽  
Livia Sforzini ◽  
Angela Lo Monaco
Keyword(s):  
Laser Cleaning

Nanosecond laser cleaning for enhanced zinc coating quality of HSLA steel

2021 ◽  
Vol 143 ◽  
pp. 107311
Author(s):  
Lixin Zhu ◽  
Qing Gao ◽  
Bingtao Sun ◽  
Yongjun Ke ◽  
Yang Tan ◽  
...  
Keyword(s):  
Hsla Steel ◽  
Zinc Coating ◽  
Laser Cleaning ◽  
Nanosecond Laser ◽  
Coating Quality
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