Výsledky vyhledávání

Characterization of microcraters fabricated on the silicon surface by single and multi-pulse laser ablation at various laser intensities

Autor: R.A.A. Khan, H. Qayyum, A.H. Dogar, Abdul Qayyum, T.U. Rahman, U. Amin, Muhammad Rafique, A. Mahmood, S. Ullah

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 487:45-51

Microcraters on the silicon surface were fabricated with the help of a nanosecond pulsed laser. The features of microcraters fabricated with single laser pulse and pulse trains of various laser intensities were analyzed. In case of single pulse, the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63f0c07a5a8ff859970a31d021b7b1f4
https://doi.org/10.1016/j.nimb.2020.11.011

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Temporal and Spectral Characterization of Electromagnetic Pulse Emitted From Nanosecond Pulsed Laser Produced Aluminum Plasma

Autor: H. Qayyum, S. Ullah, Z. U. Rehman, A.H. Dogar, Abdul Qayyum

Publikováno v: IEEE Transactions on Plasma Science. 48:3261-3266

The electromagnetic pulse (EMP) emitted from the plasma produced by interaction of 5-ns pulsed Nd:YAG ( $\lambda =532$ nm) laser with the aluminum target was measured. The laser irradiance at the target was varied in the range of $3.12\times 10^{9} -

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f56641d87fabc67aa2e3c8556fdb0d3
https://doi.org/10.1109/tps.2020.3012310

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Akademický článek

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Dynamics of the ions emitted in backward and forward direction during laser ablation of thin Sn film

Autor: A.H. Dogar, S. Ullah, H. Qayyum, T.U. Rahman, Z. U. Rehman, R.A.A. Khan, Abdul Qayyum

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 443:31-37

Laser-generated ions emitted in backward and forward directions from an 80 nm thick Sn film deposited on the soda lime glass were investigated in the range of laser fluence (93–521 J/cm2). The ion collectors operating in time-of-flight configuratio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e75eeee1a806b14ae377a0804e1adf9e
https://doi.org/10.1016/j.nimb.2019.01.042

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Kinetics of Ions Emitted From Nanosecond-Pulsed Laser-Generated Plasma in Broad Range of the Laser Fluence

Autor: T.U. Rahman, A.H. Dogar, S. Ullah, Z. U. Rehman, Abdul Qayyum, H. Qayyum

Publikováno v: IEEE Transactions on Plasma Science. 47:1283-1289

Carbon plasma was produced by irradiating a graphite target with nanosecond-pulsed Nd:YAG laser beam in the broad range of the laser fluence (25– $2196\,\,\text {J}\cdot \text {cm}^{-2}$ ). A time resolving flat Langmuir probe was used to record th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f5e28b933d5a066bb644a0472561f55
https://doi.org/10.1109/tps.2018.2886603

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Highly charged tungsten ions generated by nanosecond pulsed laser and influence of magnetic field on ion charge state

Autor: Muhammad Rafique, Shahab Ahmed Abbasi, Abdul Qayyum, S. Ullah, A.H. Dogar

Publikováno v: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 408:244-247

Ions emitted from the laser generated tungsten plume were investigated with the help of ion collector (IC) and electrostatic ion energy analyzer (IEA) operating in time-of-flight configuration. Plume was generated by irradiating a plane W target with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a03b00617107268dfffae3fd8004aee8
https://doi.org/10.1016/j.nimb.2017.05.050

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Laser-driven photoelectron induced pulsed X-ray source for energy dispersive X-ray spectroscopy and radiography applications

Autor: A.H. Dogar, Abdul Qayyum, U. Khurshid, H. Qayyum, S. Ullah, Z. U. Rehman

Publikováno v: Applied Optics. 60:2604

We present the details of a nanosecond pulsed X-ray source developed for energy dispersive X-ray spectroscopy (EDX) and low-dose fast radiography. The source is based on the illumination of a metal photocathode, placed in a Pierce-type electron gun g

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a29b232ed44216bc241ea355514e69ff
https://doi.org/10.1364/ao.419264

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Ion charge state and energy enhancement by axial magnetic field applied during laser produced plasma expansion

Autor: B. Ilyas, Shahab Ahmed Abbasi, Muhammad Rafique, A.H. Dogar, S. Ullah, Abdul Qayyum

Publikováno v: Laser and Particle Beams. 34:606-614

The effects of axial magnetic field on the properties of the ions ejected from Nd:YAG laser (wavelength = 1064 nm, pulse duration = 6 ns) produced expanding Cu plasma were investigated. A plane Cu target, without and with 0.23 T axial magnetic field

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fb0bf50cd71229e8c026ea3c2e4f244c
https://doi.org/10.1017/s0263034616000483

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