Structuring of titanium using a nanosecond-pulsed Nd:YVO4 laser at 1064 nm

Tang, Guang; Abdolvand, Amin

doi:10.1007/s00170-012-4456-x

Cited by 16 publications

(5 citation statements)

References 19 publications

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“…Line widths & threshold fluence: For a Gaussian beam profile the square of the width d of the beam -where the threshold fluence F th is achieved -is given by [13][14][15] …”

Section: Resultsmentioning

confidence: 99%

Generation of silver nanoparticles with controlled size and spatial distribution by pulsed laser irradiation of silver ion-doped glass

Wackerow¹,

Abdolvand²

2014

Opt. Express

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Silver ions were driven into glass by a direct current electric field-assisted ion exchange technique. The silver ion exchanged glass was then irradiated by laser pulses of 10 ns and 10 ps in length at 355 nm for comparison purposes. In both cases, laser irradiation led to the formation of a metallic-like film at the surface of the ion exchange glass. Scanning electron microscopy showed that the films consist of a very dense single layer of silver nanoparticles with similar particle sizes and separation. Irradiation with different laser parameters shows no significant difference in transmission spectra and modification width between ps- and ns-pulsed lasers. Particle sizes and separation at the surface are increasing with increasing laser power, and are larger for picosecond pulsed laser irradiation. It is also shown that the film formation is a thermal process.

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“…Line widths & threshold fluence: For a Gaussian beam profile the square of the width d of the beam -where the threshold fluence F th is achieved -is given by [13][14][15] …”

Section: Resultsmentioning

confidence: 99%

Generation of silver nanoparticles with controlled size and spatial distribution by pulsed laser irradiation of silver ion-doped glass

Wackerow¹,

Abdolvand²

2014

Opt. Express

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“…The assessed thermal threshold of copper at 532 nm was ~10.6 J cm −2 . These values were experimentally determined through the self-consistent evaluation of the Gaussian beam diameter and the ablation threshold 19 . A scanning pattern was programmed via the software control to the scan head such that individual parallel grooves may be written across the surface, at a set width apart (known as the hatch distance h), as shown in Fig.…”

Section: Methods Creating Laser-treated Copper Samples Six Identicalmentioning

confidence: 99%

Role of surface microgeometries on electron escape probability and secondary electron yield of metal surfaces

Bajek

Wackerow

Zanin

et al. 2020

Sci Rep

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The influence of microgeometries on the Secondary Electron Yield (SEY) of surfaces is investigated. Laser written structures of different aspect ratio (height to width) on a copper surface tuned the SEY of the surface and reduced its value to less than unity. The aspect ratio of microstructures was methodically controlled by varying the laser parameters. The results obtained corroborate a recent theoretical model of SEY reduction as a function of the aspect ratio of microstructures. Nanostructures - which are formed inside the microstructures during the interaction with the laser beam - provided further reduction in SEY comparable to that obtained in the simulation of structures which were coated with an absorptive layer suppressing secondary electron emission.

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“…This value is well above the experimentally measured value for the ablation threshold of copper at 532 nm of ∼0.42 J cm −2 , but is well below the assessed thermal threshold of copper at 532 nm of ∼10.6 J cm −2 . These were determined experimentally using the self-consistent evaluation of the Gaussian beam diameter and the ablation threshold as described in [18].…”

Section: Laser Treatment Processmentioning

confidence: 99%

First accelerator test of vacuum components with laser-engineered surfaces for electron-cloud mitigation

Calatroni

Valdivieso

Chiggiato

et al. 2017

Phys. Rev. Accel. Beams

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Electron cloud mitigation is an essential requirement for high-intensity proton circular accelerators. Among other solutions, laser engineered surface structures (LESS) present the advantages of having potentially a very low secondary electron yield (SEY) and allowing simple scalability for mass production. Two copper liners with LESS have been manufactured and successfully tested by monitoring the electron cloud current in a dipole magnet in the SPS accelerator at CERN during the 2016 run. In this paper we report on these results as well as the detailed experiments carried out on samples-such as the SEYand topography studies-which led to an optimized treatment in view of the SPS test and future possible use in the HL-LHC.

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Structuring of titanium using a nanosecond-pulsed Nd:YVO4 laser at 1064 nm

Cited by 16 publications

References 19 publications

Generation of silver nanoparticles with controlled size and spatial distribution by pulsed laser irradiation of silver ion-doped glass

Generation of silver nanoparticles with controlled size and spatial distribution by pulsed laser irradiation of silver ion-doped glass

Role of surface microgeometries on electron escape probability and secondary electron yield of metal surfaces

First accelerator test of vacuum components with laser-engineered surfaces for electron-cloud mitigation

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