Zobrazeno 1 - 10 of 146 pro vyhledávání: '"J. J. Gosselin"'
1
Formation of the Blue Core in Argon Helicon Plasma
Autor: J. J. Gosselin, Lang Cui, Christian Brandt, George Tynan, Saikat Chakraborty Thakur
Publikováno v: IEEE Transactions on Plasma Science. 43:2754-2759
Helicon plasmas are typically associated with a core, a radially localized central area of strong ion light emission. Here, we investigate the role of electrostatic instabilities that lead to the formation of the classic blue core. We show that helic
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2ed6d140e17a8fb3a2a38bc1eb4fee57
https://doi.org/10.1109/tps.2015.2446537
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2
Dynamics of formation of the blue core mode in argon helicon plasma
Autor: George Tynan, Saikat Chakraborty Thakur, Christian Brandt, J. J. Gosselin, Lang Cui
Publikováno v: 2014 IEEE 41st International Conference on Plasma Sciences (ICOPS) held with 2014 IEEE International Conference on High-Power Particle Beams (BEAMS).
Helicon plasma sources are typically associated with a core, a radially localized central area of strong light emission. Here we describe new experimental results that clearly distinguish between the capacitive to helicon mode transition in an rf hea
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ca920df22ddfcdd48a88aa3545e566e0
https://doi.org/10.1109/plasma.2014.7012628
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3
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
Autor: S. H. Sears, S. Chakraborty Thakur, J. J. Gosselin, Kyle Adriany, John McKee, E. E. Scime, George Tynan
Publikováno v: Review of Scientific Instruments. 87:11E513
We report experimental measurements of the axial plasma flow and the parallel ion temperature in a magnetized linear plasma device. We used laser induced fluorescence to measure Doppler resolved ion velocity distribution functions in argon plasma to
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::65b210e43258f71446e62597d3f52fcb
https://doi.org/10.1063/1.4959275
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4
Development of core ion temperature gradients and edge sheared flows in a helicon plasma device investigated by laser induced fluorescence measurements
Autor: J. J. Gosselin, E. E. Scime, George Tynan, Stephanie Sears, John McKee, Saikat Chakraborty Thakur
Publikováno v: Physics of Plasmas. 23:082112
We report experimental observation of ion heating and subsequent development of a prominent ion temperature gradient in the core of a linear magnetized plasma device, and the controlled shear de-correlation experiment. Simultaneously, we also observe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::20842ee0d9d35b7a32f8991079313cb9
https://doi.org/10.1063/1.4960824
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5
Overestimation of Mach number due to probe shadow
Autor: J. J. Gosselin, S. H. Sears, John McKee, George Tynan, Saikat Chakraborty Thakur, Earl Scime
Publikováno v: Physics of Plasmas. 23:073519
Comparisons of the plasma ion flow speed measurements from Mach probes and laser induced fluorescence were performed in the Controlled Shear Decorrelation Experiment. We show the presence of the probe causes a low density geometric shadow downstream
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c9e2933d9d9b353571ebb71f42e7849
https://doi.org/10.1063/1.4954820
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7
Interplay between permanent dipole moments and polarizability in positron-molecule binding
Autor: J. R. Danielson, M. R. Natisin, Adric Jones, J. J. Gosselin, Clifford M Surko
Publikováno v: Physical Review A. 85
Energy-resolved studies of positron-molecule collisions exhibit vibrational Feshbach resonances in annihilation, thus providing evidence that positrons can bind to these species. The downshifts of the observed resonances from the positions of the vib
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::904c935d7fd6f619e203ddd978362d3b
https://doi.org/10.1103/physreva.85.022709
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8
Dipole Enhancement of Positron Binding to Molecules
Autor: J. J. Gosselin, J. R. Danielson, Clifford M Surko
Publikováno v: Physical Review Letters. 104
Measurements of positron-molecule binding energies are made for molecules with large permanent dipole moments ($g2.7\text{ }\text{ }\mathrm{D}$), by studying vibrational-Feshbach-mediated annihilation resonances as a function of incident positron ene
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c8bbe3f842b7a2dd9243217b05fd538
https://doi.org/10.1103/physrevlett.104.233201
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10
Multi-instability plasma dynamics during the route to fully developed turbulence in a helicon plasma
Autor: Lang Cui, Adam Light, George Tynan, J. J. Gosselin, Saikat Chakraborty Thakur, Christian Brandt
Publikováno v: Plasma Sources Science and Technology. 23:044006
We report experimental studies demonstrating a controlled transition to fully developed broadband turbulence in an argon helicon plasma in a linear plasma device. We show the detailed dynamics during the transition from nonlinearly coupled but distin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c1e4ac4d1cafbb2c36584c98d141aa61
https://doi.org/10.1088/0963-0252/23/4/044006
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