Observation of hydrogen pellet ablation material flow by tomography

• 来源期刊: 中国物理（英文版）
• 关键词: hydrogen pellet Hα emission ablation rate tomography
• 年，卷（期）: 2006,（10）
• 页码范围: 2368-2373
• 页数: 6页
• 语种: 英文

摘要

An Hα emission measurement array with 25 detection channels has been built on HL-1M tokamak. Reconstruction maps of Hα emission distribution in plasma cross-section have been obtained by using tomography, with a hydrogen pellet injected into the plasma. The dimension, the shape and the rotation characteristic of the cross-section of the pellet ablation material flow tube have been observed. These results have been analysed and explained tentatively by using the 'tail' model and the linear expansion model.