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G. R. Tynan
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Journal Articles

Machine learning-aided line intensity ratio technique applied to deuterium plasmas

Open Access
D. Nishijima, M. J. Baldwin, F. Chang, G. R. Tynan
Journal: AIP Advances
AIP Advances 13, 055202 (2023)
https://doi.org/10.1063/5.0147463
Published: May 2023
View articletitled, Machine learning-aided line intensity ratio technique applied to deuterium plasmas
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Journal Articles

Machine learning prediction of electron density and temperature from He I line ratios

Available to Purchase
D. Nishijima, S. Kajita, G. R. Tynan
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 023505 (2021)
https://doi.org/10.1063/5.0028000
Published: February 2021
View articletitled, Machine learning prediction of electron density and temperature from He I line ratios
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Journal Articles

Compact, portable, laser induced fluorescence diagnostic for laboratory plasma sources

Available to Purchase
M. C. Paul, T. E. Steinberger, E. A. M. Lister, N. Ivan Arnold, D. Artis, S. Chakraborty Thakur, T. Hall, S. LeBlanc, E. E. Scime, E. Thomas, Jr., G. R. Tynan
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 92, 013502 (2021)
https://doi.org/10.1063/5.0031217
Published: January 2021
View articletitled, Compact, portable, laser induced fluorescence diagnostic for laboratory plasma sources
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Journal Articles

Edge turbulence evolution and intermittency development near the density limit on the HL-2A tokamak

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L. Wang, G. R. Tynan, R. Hong, L. Nie, Y. Chen, R. Ke, T. Wu, T. Long, P. Zheng, M. Xu, HL-2A Team
Journal: Physics of Plasmas
Phys. Plasmas 26, 092303 (2019)
https://doi.org/10.1063/1.5100176
Published: September 2019
View articletitled, Edge turbulence evolution and intermittency development near the density limit on the HL-2A tokamak
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Journal Articles

Comparison of probe and narrow-band imaging measurements in a magnetized cylindrical plasma

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A. D. Light, S. Chakraborty Thakur, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 26, 023502 (2019)
https://doi.org/10.1063/1.5070062
Published: February 2019
View articletitled, Comparison of probe and narrow-band imaging measurements in a magnetized cylindrical plasma
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Journal Articles

Dissociative recombination process of ammonium for HN-MAR in high density D-N plasmas

Free
S. Abe, S. Chakraborty Thakur, R. P. Doerner, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 25, 123510 (2018)
https://doi.org/10.1063/1.5056204
Published: December 2018
View articletitled, Dissociative recombination process of ammonium for HN-MAR in high density D-N plasmas
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Journal Articles

Neutralization processes of atomic/molecular deuterium ions assisted by ND3 in low density D2-N2 plasmas

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S. Abe, R. P. Doerner, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 25, 073507 (2018)
https://doi.org/10.1063/1.5037602
Published: July 2018
View articletitled, Neutralization processes of atomic/molecular deuterium ions assisted by ND3 in low density D2-N2 plasmas
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Journal Articles

Generation of parasitic axial flow by drift wave turbulence with broken symmetry: Theory and experiment

Free
R. Hong, J. C. Li, R. Hajjar, S. Chakraborty Thakur, P. H. Diamond, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 25, 055710 (2018)
https://doi.org/10.1063/1.5017884
Published: May 2018
View articletitled, Generation of parasitic axial flow by drift wave turbulence with broken symmetry: Theory and experiment
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Journal Articles

A fast low-to-high confinement mode bifurcation dynamics in the boundary-plasma gyrokinetic code XGC1

FeaturedFree
S. Ku, C. S. Chang, R. Hager, R. M. Churchill, G. R. Tynan, I. Cziegler, M. Greenwald, J. Hughes, S. E. Parker, M. F. Adams, E. D'Azevedo, P. Worley
Journal: Physics of Plasmas
Phys. Plasmas 25, 056107 (2018)
https://doi.org/10.1063/1.5020792
Published: April 2018
View articletitled, A fast low-to-high confinement mode bifurcation dynamics in the boundary-plasma gyrokinetic code XGC1
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Journal Articles

The ecology of flows and drift wave turbulence in CSDX: A model

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R. J. Hajjar, P. H. Diamond, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 25, 022301 (2018)
https://doi.org/10.1063/1.5018320
Published: February 2018
View articletitled, The ecology of flows and drift wave turbulence in CSDX: A model
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Journal Articles

Validation study of a drift-wave turbulence model for CSDX linear plasma device

Open Access
P. Vaezi, C. Holland, S. C. Thakur, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 24, 092310 (2017)
https://doi.org/10.1063/1.4995305
Published: September 2017
View articletitled, Validation study of a drift-wave turbulence model for CSDX linear plasma device
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Journal Articles

Modelling enhanced confinement in drift-wave turbulence

Free
R. J. Hajjar, P. H. Diamond, A. Ashourvan, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 24, 062106 (2017)
https://doi.org/10.1063/1.4985323
Published: June 2017
View articletitled, Modelling enhanced confinement in drift-wave turbulence
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Journal Articles

Understanding the impact of insulating and conducting endplate boundary conditions on turbulence in CSDX through nonlocal simulations

Open Access
P. Vaezi, C. Holland, S. C. Thakur, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 24, 042306 (2017)
https://doi.org/10.1063/1.4980843
Published: April 2017
View articletitled, Understanding the impact of insulating and conducting endplate boundary conditions on turbulence in CSDX through nonlocal simulations
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Journal Articles

Development of core ion temperature gradients and edge sheared flows in a helicon plasma device investigated by laser induced fluorescence measurements

Free
S. C. Thakur, J. J. Gosselin, J. McKee, E. E. Scime, S. H. Sears, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 23, 082112 (2016)
https://doi.org/10.1063/1.4960824
Published: August 2016
View articletitled, Development of core ion temperature gradients and edge sheared flows in a helicon plasma device investigated by laser induced fluorescence measurements
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Journal Articles

Laser induced fluorescence measurements of axial velocity, velocity shear, and parallel ion temperature profiles during the route to plasma turbulence in a linear magnetized plasma device

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S. Chakraborty Thakur, K. Adriany, J. J. Gosselin, J. McKee, E. E. Scime, S. H. Sears, G. R. Tynan
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 87, 11E513 (2016)
https://doi.org/10.1063/1.4959275
Published: August 2016
View articletitled, Laser induced fluorescence measurements of axial velocity, velocity shear, and parallel ion temperature profiles during the route to plasma turbulence in a linear magnetized plasma device
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Journal Articles

Overestimation of Mach number due to probe shadow

Free
J. J. Gosselin, S. C. Thakur, S. H. Sears, J. S. McKee, E. E. Scime, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 23, 073519 (2016)
https://doi.org/10.1063/1.4954820
Published: July 2016
View articletitled, Overestimation of Mach number due to probe shadow
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Journal Articles

Dynamics of intrinsic axial flows in unsheared, uniform magnetic fields

Free
J. C. Li, P. H. Diamond, X. Q. Xu, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 23, 052311 (2016)
https://doi.org/10.1063/1.4950830
Published: May 2016
View articletitled, Dynamics of intrinsic axial flows in unsheared, uniform magnetic fields
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Journal Articles

Investigating flow patterns and related dynamics in multi-instability turbulent plasmas using a three-point cross-phase time delay estimation velocimetry scheme

Open Access
C. Brandt, S. C. Thakur, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 23, 042304 (2016)
https://doi.org/10.1063/1.4945629
Published: April 2016
View articletitled, Investigating flow patterns and related dynamics in multi-instability turbulent plasmas using a three-point cross-phase time delay estimation velocimetry scheme
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Includes: Supplementary data
Journal Articles

Spontaneous profile self-organization in a simple realization of drift-wave turbulence

Free
L. Cui, A. Ashourvan, S. C. Thakur, R. Hong, P. H. Diamond, G. R. Tynan
Journal: Physics of Plasmas
Phys. Plasmas 23, 055704 (2016)
https://doi.org/10.1063/1.4944819
Published: March 2016
View articletitled, Spontaneous profile self-organization in a simple realization of drift-wave turbulence
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Includes: Supplementary data
Journal Articles

Evolution of E × B shear and coherent fluctuations prior to H-L transitions in DIII-D and control strategies for H-L transitions

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D. Eldon, R. L. Boivin, C. Chrystal, R. J. Groebner, G. R. McKee, L. Schmitz, G. R. Tynan, Z. Yan, J. A. Boedo, K. H. Burrell, J. D. King, E. Kolemen, N. C. Luhmann, Jr., C. M. Muscatello, T. H. Osborne, P. B. Snyder
Journal: Physics of Plasmas
Phys. Plasmas 22, 112506 (2015)
https://doi.org/10.1063/1.4935919
Published: November 2015
View articletitled, Evolution of E × B shear and coherent fluctuations prior to H-L transitions in DIII-D and control strategies for H-L transitions
Open the PDF for Evolution of E × B shear and coherent fluctuations prior to H-L transitions in DIII-D and control strategies for H-L transitions in another window