Abdullah Zafar

Works (6)

Updated: July 7th, 2023 21:15

2019 journal article

Doppler-free, Stark broadened profiles at low plasma densities in helium

Journal of Quantitative Spectroscopy and Radiative Transfer, 230, 48–55.

By: A. Zafar n , E. Martin* & S. Shannon n 

author keywords: Stark broadening; Low-density; Quasi-static; Doppler-free
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Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: June 17, 2019

2018 journal article

High resolution magnetic field measurements in hydrogen and helium plasmas using active laser spectroscopy

Review of Scientific Instruments, 89(10), 10D126.

By: A. Zafar n , E. Martin* & S. Shannon n 

TL;DR: The diagnostic relies on measuring a high resolution spectral profile using Doppler-free saturation spectroscopy (DFSS) and then fitting the spectrum to a quantum mechanical model and has been successfully employed to measure the magnetic field in magnetized, low-temperature, high-density, hydrogen and helium plasmas. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: November 26, 2018

2016 journal article

A temporally and spatially resolved electron density diagnostic method for the edge plasma based on Stark broadening

Review of Scientific Instruments, 87(11), 11E505.

By: A. Zafar n , E. Martin *, S. Shannon n , R. Isler * & J. Caughman *

TL;DR: The quasi-static approach used to calculate the Doppler-free spectral line profile is outlined here and the results from the model are presented for H-δ spectra for electron densities of 1010-1013 cm-3. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2016 journal article

All The Catalytic Active Sites of MoS2 for Hydrogen Evolution

Journal of the American Chemical Society, 138(51), 16632–16638.

By: G. Li n, D. Zhang *, Q. Qiao *, Y. Yu n, D. Peterson n, A. Zafar* , R. Kumar n, S. Curtarolo * ...

TL;DR: It is demonstrated that, in addition to the well-known catalytically active edge sites, sulfur vacancies provide another major active site for the HER, while the catalytic activity of grain boundaries is much weaker. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2016 article

Applications of Doppler-free saturation spectroscopy for edge physics studies

Martin, E. H., Zafar, A., Caughman, J. B. O., Isler, R. C., & Bell, G. L. (2016, November). REVIEW OF SCIENTIFIC INSTRUMENTS, Vol. 87.

By: E. Martin *, A. Zafar n , J. Caughman *, R. Isler * & G. Bell *

TL;DR: This paper presents the technique and associated physics of Doppler-free saturation spectroscopy in addition to how one selects the appropriate transition and simulations of Hδ spectra are presented to illustrate the increased sensitivity to both electric field and electron density measurements. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2015 journal article

Control of ion energy distributions using phase shifting in multi-frequency capacitively coupled plasmas

Journal of Applied Physics, 117(23), 233302.

By: Y. Zhang *, A. Zafar n , D. Coumou *, S. Shannon n  & M. Kushner *

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7. Affordable and Clean Energy (OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

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