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1	An examination of the effects of neutral particles on the edge plasma in tokamaks Friis, Zachary Ward 02 April 2010 (has links) A detailed analysis of neutral atom recycling and pedestal fueling in a DIII-D [J. Luxon, Nucl. Fusion, 42, 614, 2002] high-confinement mode discharge is presented. Experimental data and 2D edge plasma fluid code calculations are employed to provide ion wall recycling and recombination neutral sources and background edge plasma parameters for a 2D edge neutral code calculation of detailed neutral density, ionization and charge-exchange distributions throughout the edge pedestal, scrape-off layer and surrounding halo region, divertor, and private flux regions. The effectiveness of the different neutral sources for fueling the confined plasma is evaluated. Fusion Edge Neutral particles Plasma Tokamaks Particles (Nuclear physics) Plasma (Ionized gases)
2	Modelos aproximados para o calculo do transporte de particulas neutras em dutos ONO, SHIZUCA 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:44:01Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:07:20Z (GMT). No. of bitstreams: 1 06913.pdf: 2715369 bytes, checksum: 9d927e16226a25d1d362ba0ebc83502c (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP NEUTRAL-PARTICLE TRANSPORT NEUTRAL PARTICLES DUCTS TRANSPORT THEORY GALERKIN-PETROV METHOD DISCRETE ORDINATE METHOD QUADRATURES MULTIGROUP THEORY MONTE CARLO METHOD M CODES
3	Modelos aproximados para o calculo do transporte de particulas neutras em dutos ONO, SHIZUCA 09 October 2014 (has links) Made available in DSpace on 2014-10-09T12:44:01Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:07:20Z (GMT). No. of bitstreams: 1 06913.pdf: 2715369 bytes, checksum: 9d927e16226a25d1d362ba0ebc83502c (MD5) / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP neutral-particle transport neutral particles ducts transport theory galerkin-petrov method discrete ordinate method quadratures multigroup theory monte carlo method m codes
4	An investigation of MARFE induced H-L back transitions Friis, Zachary Ward 21 September 2005 (has links) The common observation that the onset of a core MARFE (edge localized, poloidally asymmetric, highly radiating region) is followed immediately by a High-to-Low confinement mode transition in DIII-D was investigated by comparing a theoretical prediction of the threshold non-radiative power across the separatrix needed to maintain H-mode with an experimental determination of the non-radiative power flowing across the separatrix. It was found that in three shots with continuous gas fueling that the increased neutral influx associated with the MARFE formation caused a sharp increase in the predicted threshold non-radiative power crossing the separatrix that was required for the plasma to remain in H-mode to a value comparable to the experimental power crossing the separatrix, indicating a theoretical prediction of a H-L transition in agreement with experimental observation. Edge Fusion reactors High mode H-L transitions Low mode Neutral particles Nuclear fusion Plasma confinement Plasma edges Plasma instabilities Plasma physics Thermal instabilities Tokamaks MARFE

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