Dust creation and transport in MAST

Dust creation and transport in MAST
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MAST 中粉尘的产生和输送

DOI:
10.1088/0029-5515/50/10/105012
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发表时间:
2010
期刊:
影响因子:
3.3
通讯作者:
De Temmerman G
De Temmerman G
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
De Temmerman G

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在这方面的贡献,我们报告在MAST进行的实验,调查灰尘的产生,运输和对等离子体性能的影响。MAST的特殊诊断通道允许利用快速红外相机对偏滤器和主室中的尘埃粒子运动进行立体成像。该技术允许重建粒子的3D轨迹。对破裂过程中尘埃产生的红外成像显示,尘埃粒子以非常高的速度(高达350 m s− 1)从表面各向同性释放。立体成像已被用来研究,第一次,动员和运输偏滤器等离子体的碳和钨颗粒与已知的尺寸分布,这是通过偏滤器探头引入到血管中。观察到碳颗粒尺寸和等离子体加速之间的相关性。钨粒子被发现以较低的速度移动,并经历较低的加速度,被发现更倾向于垂直运动的核心等离子体。在大颗粒的情况下,这可能导致早期破坏。已进行了模拟的尘埃喷射实验中使用的DTOKS代码,试图验证在模拟中采用的传输方程。
In this contribution, we report on experiments performed in MAST to investigate dust creation, transport and influence on plasma performance. The exceptional diagnostic access of MAST allows stereoscopic imaging of dust particles' motion in both the divertor and the main chamber, utilizing fast infrared cameras. This technique allows the 3D trajectory of the particles to be reconstructed. Infrared imaging of dust creation during disruptions revealed an isotropic release of dust particles from the surface with very high velocities (up to 350 m s− 1). Stereoscopic imaging has been used to study, for the first time, the mobilization and transport in the divertor plasmas of carbon and tungsten particles with known size distributions, which were introduced into the vessel through a divertor probe. A correlation between the carbon particle size and acceleration by the plasma is observed. Tungsten particles are found to move with lower velocities and experience lower acceleration and are found to be more prone to vertical motion towards the core plasma. In the case of large particles this can lead to early disruptions. Modelling of the dust injection experiments has been conducted using the DTOKS code in an attempt to validate the transport equations employed in the simulation.
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发表时间: 2009
期刊:
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MAST L 模式放电期间热负荷不对称性的热成像研究
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发表时间: 2010
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DOI: --
发表时间: 2008
期刊: Contrib.Plasma Phys. 48
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作者:
K.Kasamoto;H.Kawabata;T.Usui;N.Hayashi;T.Takizuka;K.Shimizu;Y.Tomita
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对 MAST 托卡马克收集的灰尘样本进行分析
DOI: --
发表时间: 2010
期刊:
影响因子: --
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C. Arnas;C. Pardanaud;C. Martin;P. Roubin;G. D. Temmerman;G. Counsell
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