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1	Plasma Flow Velocity Measurements Using A Gundestrup Probe In The STOR-M Tokamak St. Germaine, Geoffrey Martin Reginald 22 August 2006 The profile of the poloidal velocity in the edge region of tokamak plasmas has been identified as playing a major role in the confinement of particles and energy. It has been suggested that a strongly sheared poloidal flow can reduce particle and energy losses by the stabilization of unstable modes and decorrelation of turbulence the edge region of the plasma. A Gundestrup probe, a Mach probe array, is used to measure both the parallel and perpendicular flow velocities in the Saskatchewan Torus-Modified (STOR-M) tokamak during several discharge conditions. It is observed that during Ohmic discharges there is no velocity shear and the direction of the parallel flow is independent of the direction of the toroidal magnetic field. During H-mode induced by a turbulent heating current pulse, a region of strong velocity shear develops in the plasma edge and an edge transport barrier develops. This results in a short period of improved particle and energy confinement with reduced fluctuation amplitudes. During electrode biasing experiments, a stainless steel biasing electrode is inserted into the plasma up to r = 82 mm and biased to +500 V relative to the vacuum chamber. It is observed that the particle confinement improves during the biasing phase while the energy confinement is degraded. A region of weak shear in the poloidal flow is observed in the plasma scrapeoff layer (SOL). The results from STOR-M are compared with results from data taken in the Czech Academy of Sciences Torus (CASTOR) tokamak during both Ohmic discharges and discharges with electrode biasing. CASTOR toroidal flow poloidal flow rake probe mach probe langmuir probe turbulent heating electrode biasing
2	Plasma flow velocity measurements with a Gundestrup probe in the STOR-M tokamak St. Germaine, Geoffrey Martin Reginald 23 August 2006 The profile of the poloidal velocity in the edge region of tokamak plasmas has been identified as playing a major role in the confinement of particles and energy. It has been suggested that a strongly sheared poloidal flow can reduce particle and energy losses by the stabilization of unstable modes and decorrelation of turbulence the edge region of the plasma. A Gundestrup probe, a Mach probe array, is used to measure both the parallel and perpendicular flow velocities in the Saskatchewan Torus-Modified (STOR-M) tokamak during several discharge conditions. It is observed that during Ohmic discharges there is no velocity shear and the direction of the parallel flow is independent of the direction of the toroidal magnetic field. During H-mode induced by a turbulent heating current pulse, a region of strong velocity shear develops in the plasma edge and an edge transport barrier develops. This results in a short period of improved particle and energy confinement with reduced fluctuation amplitudes. During electrode biasing experiments, a stainless steel biasing electrode is inserted into the plasma up to r = 82 mm and biased to +500 V relative to the vacuum chamber. It is observed that the particle confinement improves during the biasing phase while the energy confinement is degraded. A region of weak shear in the poloidal flow is observed in the plasma scrapeoff layer (SOL). The results from STOR-M are compared with results from data taken in the Czech Academy of Sciences Torus (CASTOR) tokamak during both Ohmic discharges and discharges with electrode biasing. H-mode improved confinement turbulent heating toroidal flow langmuir probe castor poloidal flow mach probe nuclear fusion electrode biasing
3	Plasma flow velocity measurements with a Gundestrup probe in the STOR-M tokamak St. Germaine, Geoffrey Martin Reginald 23 August 2006 (has links) The profile of the poloidal velocity in the edge region of tokamak plasmas has been identified as playing a major role in the confinement of particles and energy. It has been suggested that a strongly sheared poloidal flow can reduce particle and energy losses by the stabilization of unstable modes and decorrelation of turbulence the edge region of the plasma. A Gundestrup probe, a Mach probe array, is used to measure both the parallel and perpendicular flow velocities in the Saskatchewan Torus-Modified (STOR-M) tokamak during several discharge conditions. It is observed that during Ohmic discharges there is no velocity shear and the direction of the parallel flow is independent of the direction of the toroidal magnetic field. During H-mode induced by a turbulent heating current pulse, a region of strong velocity shear develops in the plasma edge and an edge transport barrier develops. This results in a short period of improved particle and energy confinement with reduced fluctuation amplitudes. During electrode biasing experiments, a stainless steel biasing electrode is inserted into the plasma up to r = 82 mm and biased to +500 V relative to the vacuum chamber. It is observed that the particle confinement improves during the biasing phase while the energy confinement is degraded. A region of weak shear in the poloidal flow is observed in the plasma scrapeoff layer (SOL). The results from STOR-M are compared with results from data taken in the Czech Academy of Sciences Torus (CASTOR) tokamak during both Ohmic discharges and discharges with electrode biasing. H-mode improved confinement turbulent heating toroidal flow langmuir probe castor poloidal flow mach probe nuclear fusion electrode biasing
4	トカマクプラズマにおけるプラズマ回転の動的形成過程上杉, 喜彦, 高村, 秀一, 大野, 哲靖, 叶, 民友 03 1900 (has links) 科学研究費補助金研究種目:基盤研究(B)(2) 課題番号:11480113 研究代表者:上杉喜彦研究期間:1999-2001年度 Dynamic Ergodic Divertor E × B Plasma Rotation EXBシアーフロー Electric Field Shear Electrode Biasing E×Bプラズマ回転 Fast Feedback Control IGBT Inverter Power Supply IGBTインバータ IGBTインバータ電源 Plasma Rotation Rotating Helical Magnetic Field アルフヴェン共鳴インバータ電源エルゴディックダイバータプラズマ回転回転ヘリカル摂動磁場回転ヘリカル磁場磁気島電場シアー電極バイアス高速フィードバック制御

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