Zobrazeno 1 - 10
of 75
pro vyhledávání: '"G. von Nessi"'
Autor:
A. Thorman, Jinseok Ko, G. von Nessi, John Howard, Clive Michael, J Chung, de Mfm Maarten Bock
Publikováno v:
Journal of the Korean Physical Society, 65(8), 1257-1260. Korean Physical Society
The motional Stark effect (MSE) diagnostic is used to measure the radial magnetic pitch-angle profile in neutral-beam-heated plasmas. The diagnostic relies upon the measurement of the polarization direction of Stark-split D-alpha emission from inject
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8186c815d8ebb9ccf0aca9c1e0f1227f
https://doi.org/10.3938/jkps.65.1257
https://doi.org/10.3938/jkps.65.1257
Autor:
G. von Nessi, Matthew Hole
Publikováno v:
The Review of scientific instruments. 84(6)
A unified, Bayesian inference of midplane electron temperature and density profiles using both Thompson scattering (TS) and interferometric data is presented. Beyond the Bayesian nature of the analysis, novel features of the inference are the use of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::140947631d362b67d97dc55a69fe6a63
https://pubmed.ncbi.nlm.nih.gov/23822343
https://pubmed.ncbi.nlm.nih.gov/23822343
Autor:
Samuel Lazerson, Graham Dennis, G. von Nessi, Stuart R. Hudson, Robert L. Dewar, Matthew Hole, M. McGann
We describe the construction of stepped-pressure equilibria as extrema of a multi-region, relaxed magnetohydrodynamic (MHD) energy functional that combines elements of ideal MHD and Taylor relaxation, and which we call MRXMHD. The model is compatible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0525b08750b3851b71a0071feb396f46
http://arxiv.org/abs/1211.3072
http://arxiv.org/abs/1211.3072
Autor:
Matthew Hole, G. von Nessi
A new method, based on Bayesian analysis, is presented which unifies the inference of plasma equilibria parameters in a Tokamak with the ability to quantify differences between inferred equilibria and Grad-Shafranov force-balance solutions. At the he
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a33b0c6d8d410a92f2097633ec88683
http://arxiv.org/abs/1209.3068
http://arxiv.org/abs/1209.3068
Publikováno v:
Plasma Physics and Controlled Fusion
Plasma Physics and Controlled Fusion, v.53 (2011)
Plasma Physics and Controlled Fusion, v.53 (2011)
In this paper we study the effects of poloidal and toroidal rotation, and anisotropy in tokamaks. To resolve these effects from uncertainties in the data, we introduce a Bayesian inference framework which calculates the magnetic configuration probabi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5262b4811b4289ef01d9d0f13fcd7f7c
https://hdl.handle.net/11858/00-001M-0000-0026-EB89-B11858/00-001M-0000-0026-EB87-F
https://hdl.handle.net/11858/00-001M-0000-0026-EB89-B11858/00-001M-0000-0026-EB87-F
In this paper, current profiles for plasma discharges on the Mega-Ampere Spherical Tokamak (MAST) are directly calculated from pickup coil, flux loop and Motional-Stark Effect (MSE) observations via methods based in the statistical theory of Bayesian
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa481adf35cb6caa4e630b249be4d039
http://arxiv.org/abs/1101.0183
http://arxiv.org/abs/1101.0183
The vanishing of the divergence of the total stress tensor (magnetic plus kinetic) in a neighborhood of an equilibrium plasma containing a toroidal surface of discontinuity gives boundary and jump conditions that strongly constrain allowable continua
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c7eeccc249702b939650f5d3b1c42157
http://arxiv.org/abs/1002.3499
http://arxiv.org/abs/1002.3499
Autor:
G. von Nessi
Publikováno v:
IEEE Transactions on Plasma Science. 39:3004-3005
Inference of plasma equilibrium geometry in tokamak fusion plasmas constitutes a challenging inference problem, given intrinsic difficulties surrounding the making of direct measurements in such physical systems. Traditionally, this problem has been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfbfe161aa81d22824dfe444619ad24d
https://doi.org/10.1109/tps.2011.2162967
https://doi.org/10.1109/tps.2011.2162967
Autor:
Matthew Hole, G. von Nessi
Publikováno v:
Plasma Physics and Controlled Fusion. 56:114011
We present recent results and technical breakthroughs for the Bayesian inference of tokamak equilibria using force-balance as a prior constraint. Issues surrounding model parameter representation and posterior analysis are discussed and addressed. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1af69e8a53aedc621002da6565cd591a
https://doi.org/10.1088/0741-3335/56/11/114011
https://doi.org/10.1088/0741-3335/56/11/114011