Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Robert Boivin"'
Publikováno v:
Revue québécoise de linguistique. 28:29-50
Les modèles connexionistes tendent à démontrer que les règles postulées par les théories ayant une approche symbolique peuvent se résumer à une capacité organisationnelle du cerveau, où l’ordre n’est que le résultat émergent des fonct
Autor:
Samuel A. Cohen, Earl Scime, Nathaniel Ferraro, Nicholas S. Siefert, Mahmood Miah, Robert Boivin, S. Stange, Xuan Sun
Publikováno v:
IEEE Transactions on Plasma Science. 34:792-803
The Magnetic Nozzle Experiment (MNX) is a linear magnetized helicon-heated plasma device, with applications to advanced spacecraft-propulsion methods and solar-corona physics. This paper reviews ion and electron energy distributions measured in MNX w
Publikováno v:
Physics of Plasmas. 10:2593-2598
Using laser-induced fluorescence, measurements have been made of metastable argon-ion, Ar+*(3d4F7/2), velocity distributions on the major axis of an axisymmetric magnetic-mirror device whose plasma is sustained by helicon wave absorption. Within the
Autor:
Robert Boivin, Paul Keiter, E. E. Scime, Amy Keesee, Matthew M. Balkey, John Kline, Xuan Sun, M. W. Zintl, C. S. Compton, R. A. Hardin
Publikováno v:
Physics of Plasmas. 10:2127-2135
Recent experiments have demonstrated that phenomena associated with ion dynamics, such as the lower hybrid resonance, play an important role in helicon source operation. In this work, a review of recent ion heating measurements and the role of the sl
Publikováno v:
Physics of Plasmas. 8:5303-5314
Electron temperature measurements in helicon plasmas are difficult. The presence of intense rf fields in the plasma complicates the interpretation of Langmuir probe measurements. Furthermore, the non-negligible ion temperature in the plasma considera
Publikováno v:
Plasma Sources Science and Technology. 10:284-294
We report measurements of electron density and perpendicular ion temperatures in an argon helicon plasma for five different rf antennas: a?Nagoya type III antenna, a `Boswell' saddle coil antenna, a 19?cm long m = + 1 helical antenna, a 30?cm long m
Autor:
Matthew M. Balkey, S. Peter Gary, Earl Scime, Robert Boivin, John Kline, Melanie Blackburn, Paul Keiter
Publikováno v:
Physics of Plasmas. 7:2157-2165
Measurements of parallel and perpendicular ion temperatures in the Large Experiment on Instabilities and Anisotropies (LEIA) space simulation chamber display an inverse correlation between the upper bound on the ion temperature anisotropy and the par
Publikováno v:
Physics of Plasmas. 7:779-783
Laser induced fluorescence measurements of ion temperatures, parallel and perpendicular to the local magnetic field, in the Large Experiment on Instabilities and Anisotropies space simulation chamber (a steady-state, high beta, argon plasma) display
Publikováno v:
Review of Scientific Instruments. 75:4091-4093
Recently, we demonstrated that a single, tunable, low-power, diode laser can be used for laser-induced fluorescence (LIF) measurements of both argon ions and helium neutrals. We have now identified a third fluorescence scheme, for neutral argon atoms