Výsledky vyhledávání - "Vladimir Svidzinski"

Hybrid Iterative Approach for Simulation of Radio-frequency Fields in Plasma

Autor: Jin-Soo Kim, Vladimir Svidzinski, Liangji Zhao, S.A. Galkin, Joseph Spencer

Publikováno v: Physics Student Research

A novel iterative approach for solving discretized linear wave equations in a frequency domain, which combines time evolution with iterative relaxation schemes, is presented. In this hybrid approach, each iteration cycle consists of evolution of elec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::798f84b407ad80a6082369213256fa30
https://digitalcommons.usu.edu/phys_stures/33

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Coupling to the electron Bernstein wave using a phased array of waveguides in MST reversed field pinch

Autor: Mirela Cengher, Jay Anderson, Vladimir Svidzinski, Cary Forest

Publikováno v: Nuclear Fusion. 46:521-531

Coupling to the electron Bernstein wave (EBW) via a phased array of waveguides is experimentally investigated in the Madison symmetric torus reversed field pinch (RFP). EBWs promise to provide localized heating and current drive in overdense plasmas

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd24535a93dc510cdba613fa7a23eaf7
https://doi.org/10.1088/0029-5515/46/5/004

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Overview of results in the MST reversed field pinch experiment

Publikováno v: Nuclear fusion 45 (2005): 276–282. doi:10.1088/0029-5515/45/10/S23
info:cnr-pdr/source/autori:S.C. Prager; J. Adney; A. Almagri; J. Anderson; A. Blair; D.L. Brower; M. Cengher; B.E. Chapman; S. Choi; D. Craig; S. Combs; D.R. Demers; D.J. Den Hartog; B. Deng; W.X. Ding; F. Ebrahimi; D. Ennis; G. Fiksel; R. Fitzpatrick; C. Foust; C.B. Forest; P. Franz; L. Frassinetti; J. Goetz; D. Holly; B. Hudson; M. Kaufman; T. Lovell; L. Marrelli; P. Martin; K. McCollam; V.V. Mirnov; P. Nonn; R. O'Connell; S. Oliva; P. Piovesan; I. Predebon; J.S. Sarff; G. Spizzo; V. Svidzinski; M. Thomas; E. Uchimoto; R. White; M. Wyman/titolo:Overview of results in the MST reversed field pinch experiment/doi:10.1088%2F0029-5515%2F45%2F10%2FS23/rivista:Nuclear fusion/anno:2005/pagina_da:276/pagina_a:282/intervallo_pagine:276–282/volume:45

Confinement in the reversed field pinch (RFP) has been shown to increase strongly with current profile control. The MST RFP can operate in two regimes: the standard regime with a naturally occurring current density profile, robust reconnection and dy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b9eeefebcbc6911c1a1911d15b4b099
https://doi.org/10.1088/0029-5515/45/10/s23

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Laser Faraday rotation measurement of current density fluctuations and electromagnetic torque (invited)

Autor: D. L. Brower, Bihe Deng, Vladimir Svidzinski, Weixing Ding, Stewart C. Prager, Darren Craig

Publikováno v: Review of Scientific Instruments. 75:3387-3392

Far-infrared laser polarimetry with time response up to ∼1 μs and spatial resolution ∼8 cm has been successfully implemented on the Madison Symmetric Torus reversed-field pinch. Internal magnetic field and current density fluctuations are nonper

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b7842e713a6dcc734a05b2d13b21bf7
https://doi.org/10.1063/1.1785275

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Effects of particles with large gyroradii on resistive magnetohydrodynamic stability

Autor: Stewart C. Prager, Vladimir Svidzinski

Publikováno v: Physics of Plasmas. 11:980-991

Fast ions in tokamaks are known to have a significant influence on global plasma instabilities. In normal mode analyses for tokamaks, the perturbed electric and magnetic fields have been evaluated at the position of the particle’s guiding center. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::764456ecf7d7633c5252355bf24662d4
https://doi.org/10.1063/1.1643058

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Plasma heating in reversed field pinches at the fundamental ion cyclotron frequency

Autor: Stewart C. Prager, Vladimir Svidzinski

Publikováno v: Physics of Plasmas. 9:1342-1347

The possibility of plasma heating in reversed field pinches (RFP) by radio-frequency (rf) waves at ω≈ωci is studied. A simple cylindrical RFP equilibrium which is symmetric in poloidal and axial directions is considered. RF fields are excited wit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5db66bdc7e8deef678f55d010a59c839
https://doi.org/10.1063/1.1463417

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Hot plasma dielectric response to radio-frequency fields in inhomogeneous magnetic field

Autor: Liangji Zhao, Joseph Spencer, E. G. Evstatiev, J.S. Kim, Vladimir Svidzinski, S. A. Galkin

Publikováno v: Physics of Plasmas. 23:112101

Hot plasma dielectric response models, which are now used in most linear full wave codes, are formulated in Fourier space assuming that particle's Larmor radius is much smaller than the scale of spatial nonuniformity of magnetic field. Such approxima

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fa8d5518510d9ab986b114b039ff9621
https://doi.org/10.1063/1.4966638

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Nonambipolar Magnetic-Fluctuation-Induced Particle Transport and Plasma Flow in the MST Reversed-Field Pinch

Autor: W. X. Ding, Stewart C. Prager, J. S. Sarff, D. L. Brower, Vladimir Svidzinski, Darren Craig, Bihe Deng

Publikováno v: Physical Review Letters. 99

First direct measurements of nonambipolar magnetic fluctuation-induced charge transport in the interior of a high-temperature plasma are reported. Global resistive tearing modes drive the charge transport which is measured in the vicinity of the reso

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::374a890d83b876f295b1188a8ae726c7
https://doi.org/10.1103/physrevlett.99.055004

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Recent improvements in confinement and beta in the MST reversed-field pinch

Autor: T. F. Yates, Joshua A. Reusch, B. E. Chapman, D. R. Demers, D.J. Den Hartog, T. W. Lovell, Rob O'Connell, G. Fiksel, Karsten McCollam, F. Ebrahimi, Mirela Cengher, M. T. Borchardt, Piero Martin, V. I. Davydenko, Weixing Ding, C.R. Foust, S. Gangadhara, W. A. Cox, S.P. Oliva, Italo Predebon, A. F. Almagri, A. A. Lizunov, M.C. Kaufman, A. Kuritsyn, P. D. Nonn, S.K. Combs, D. J. Clayton, Paolo Piovesan, A. A. Ivanov, A. P. Blair, T. D. Tharp, Cary Forest, D. J. Holly, S. Choi, Richard Magee, John Goetz, R. W. Harvey, Vladimir Mirnov, Darren Craig, D. R. Burke, Lionello Marrelli, Paolo Franz, H. D. Cummings, M. A. Thomas, Jay Anderson, J. S. Sarff, D. L. Brower, Vladimir Svidzinski, J. W. Ahn, David Ennis, Max Wyman, Yu. A. Tsidulko, M.C. Miller, Bihe Deng, Federica Bonomo, Stewart C. Prager, B. Hudson, Alexei Beklemishev, Lorenzo Frassinetti

Publikováno v: Nuclear fusion 47 (2007): L17–L20. doi:10.1088/0029-5515/47/9/L01
info:cnr-pdr/source/autori:D.J. Den Hartog1; J.-W. Ahn1; A.F. Almagri1; J.K. Anderson1; A.D. Beklemishev2; A.P. Blair1; F. Bonomo3; M.T. Borchardt1; D.L. Brower4; D.R. Burke1; M. Cengher1; B.E. Chapman1; S. Choi1; D.J. Clayton1; W.A. Cox1; S.K. Combs5; D. Craig1; H.D. Cummings1; V.I. Davydenko2; D.R. Demers6; B.H. Deng4; W.X. Ding4; F. Ebrahimi1; D.A. Ennis1; G. Fiksel1; C. Foust5; C.B. Forest1; P. Franz3; L. Frassinetti3; S. Gangadhara1; J.A. Goetz1; R.W. Harvey1; D.J. Holly1; B.F. Hudson1; A.A. Ivanov2; M.C. Kaufman1; A.V. Kuritsyn1; A.A. Lizunov2; T.W. Lovell1; R.M. Magee1; L. Marrelli3; P. Martin3; K.J. McCollam1; M.C. Miller1; V.V. Mirnov1; P.D. Nonn1; R. O'Connell1; S.P. Oliva1; P. Piovesan3; S.C. Prager1; I. Predebon3; J.A. Reusch1; J.S. Sarff1; V.A. Svidzinski1; T.D. Tharp1; M.A. Thomas1; Yu.A. Tsidulko2; M.D. Wyman1; T. Yates4/titolo:Recent improvements in confinement and beta in the MST reversed-field pinch/doi:10.1088%2F0029-5515%2F47%2F9%2FL01/rivista:Nuclear fusion/anno:2007/pagina_da:L17/pagina_a:L20/intervallo_pagine:L17–L20/volume:47

In the general area of confinement improvement and concept advancement, recent results in the Madison Symmetric Torus (MST) reversed-field pinch (RFP) include good confinement of both thermal and large-orbit ions and near doubling of total beta to 26

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::289e50e52050b72596a5143d273b2217
http://hdl.handle.net/11577/127694

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Dynamo-free plasma in the reversed-field pinch: Advances in understanding the reversed-field pinch improved confinement mode

Publikováno v: Physics of plasmas 12 (2005): 056118. doi:10.1063/1.1883666
info:cnr-pdr/source/autori:Anderson J.K.; J. Adney; A. Almagri; A. Blair; D.L. Brower; M. Cengher; B.E. Chapman; S. Choi; D. Craig; D.R. Demers; D.J. Den Hartog; B. Deng; W.X. Ding; F. Ebrahimi; D. Ennis; G. Fiksel; C.B. Forest; P. Franz; J. Goetz; R.W. Harvey; D. Holly; B. Hudson; M. Kaufman; T. Lovell; L. Marrelli; P. Martin; K. McCollam; V. V. Mirnov; P. Nonn; R. O'Connell; S. Oliva; P. Piovesan; S. C. Prager; I. Predebon; J. S. Sarff; G. Spizzo; V. Svidzinski; M. Thomas; M. D. Wyman/titolo:Dynamo-free plasma in the reversed-field pinch: Advances in understanding the reversed-field pinch improved confinement mode/doi:10.1063%2F1.1883666/rivista:Physics of plasmas/anno:2005/pagina_da:056118/pagina_a:/intervallo_pagine:056118/volume:12

Generation and sustainment of the reversed field pinch (RFP) magnetic configuration normally relies on dynamo activity. The externally applied electric field tends to drive the equilibrium away from the relaxed, minimum energy state which is roughly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12f080a85b8d58dee8f47fe51a8e4248
http://hdl.handle.net/11577/1425042

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