Global two-fluid simulations of geodesic acoustic modes in strongly shaped tight aspect ratio tokamak plasmas

Robinson J.R.; Hnat B.; Thyagaraja A.; McClements K.G.; Knight P.J.; Kirk A.

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Global two-fluid simulations of geodesic acoustic modes in strongly shaped tight aspect ratio tokamak plasmas

机译：大形状紧密纵横比托卡马克等离子体中测地声模的全局双流体模拟

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Following recent observations suggesting the presence of the geodesic acoustic mode (GAM) in ohmically heated discharges in the Mega Amp Spherical Tokamak (MAST) [J. R. Robinson, Plasma Phys. Controlled Fusion 54, 105007 (2012)], the behaviour of the GAM is studied numerically using the two fluid, global code CENTORI [P. J. Knight Comput. Phys. Commun. 183, 2346 (2012)]. We examine mode localisation and effects of magnetic geometry, given by aspect ratio, elongation, and safety factor, on the observed frequency of the mode. An excellent agreement between simulations and experimental data is found for simulation plasma parameters matched to those of MAST. Increasing aspect ratio yields good agreement between the GAM frequency found in the simulations and an analytical result obtained for elongated large aspect ratio plasmas.

机译：最近的观察表明，兆安球形托卡马克（MAST）的欧姆加热放电中存在测地声模（GAM）[J. R. Robinson，等离子物理。 Controlled Fusion 54，105007（2012）]中，使用两种流体的全局代码CENTORI [P. J.骑士计算机。物理社区183，2346（2012）]。我们研究了模式的局部化和磁性几何形状的影响，这些因素由纵横比，伸长率和安全系数给出，对模式的观察频率有影响。对于与MAST匹配的模拟血浆参数，发现了模拟与实验数据之间的极好的一致性。长宽比的增加会在模拟中发现的GAM频率与细长大长径比等离子体的分析结果之间达成良好的一致性。

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《Physics of plasmas》 |2013年第1期|共6页
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Robinson J.R.; Hnat B.; Thyagaraja A.; McClements K.G.; Knight P.J.; Kirk A.;
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GAM; MAST; CENTORI;

机译：GAM;MAST;CENTORI;

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专利

1. Global two-fluid simulations of geodesic acoustic modes in strongly shaped tight aspect ratio tokamak plasmas [J] . Robinson J.R., Hnat B., Thyagaraja A., Physics of plasmas . 2013,第5aPta1期

机译：大形状紧密纵横比托卡马克等离子体中测地声模的全局双流体模拟
2. Singular global components and frequency shift of the geodesic acoustic continuum modes in shaped tokamaks [J] . Wahlberg C., Graves J. P. Plasma physics and controlled fusion . 2019,第7期

机译：成形Tokamaks的测地声学连续体模式的奇异全球组件和频移
3. Erratum: Global two-fluid turbulence simulations of L-H transitions and edge localized mode dynamics in the COMPASS-D tokamak (Physics of Plasmas (2010) 17 (042507)) [J] . Thyagaraja A., Valovi? M., Knight P.J. Physics of plasmas . 2010,第6期

机译：勘误：COMPASS-D托卡马克中L-H跃迁和边缘局部模式动力学的全局双流体湍流模拟（Plasmass（Plasmas（2010）17（042507））
4. Perturbed vacuum magnetic field and global m= 2 components associated with geodesic acoustic modes in tokamaks [C] . C. Wahlberg, J. P. Graves EPS Conference on Plasma Physics . 2016

机译：扰动的真空磁场和全局M = 2个组件与Tokamaks中的测地声学模式相关联
5. Predictive integrated modeling of low aspect ratio tokamaks and large scale instabilities in tokamaks [D] . Nguyen, Canh Ngoc 2004

机译：低纵横比托卡马克和托卡马克中的大规模不稳定性的预测集成模型
6. Simulations tackle abrupt massive migrations of energetic beam ions in a tokamak plasma [O] . Andreas Bierwage, Kouji Shinohara, Yasushi Todo, -1

机译：模拟解决了托卡马克等离子体中高能束离子的突然大量迁移
7. Erratum: “Global two-fluid turbulence simulations of L-H transitions and edge localized mode dynamics in the COMPASS-D tokamak” Phys. Plasmas 17, 042507 (2010) [O] . A. Thyagaraja, M. Valovič, P. J. Knight 2010

机译：错误：“Compass-D Tokamak中的L-H转换和边缘局部模式动态的全局两种流体湍流模拟”物理。 Plasmas 17,042507（2010）

Global two-fluid simulations of geodesic acoustic modes in strongly shaped tight aspect ratio tokamak plasmas

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