PLASMA TRANSPORT STUDY BY ANLYSIS FOR TRANSIENT RESPONSES TO APPLIED

通过对所施加的瞬态响应进行分析来进行血浆传输研究

• 批准号: 09680462
• 负责人: ZUSHI Hideki
• 金额: $ 1.6万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09680462/
• 关键词: non-uniform perturbation; pellet; current drive; lower hybrid waves; local heating; confinement improvement

The purpose of this research is to resolve the plasma transport by analysing transient responses to local non-uniform perturbations. The following results are obtained.(1)In Heliotron E internal disruption and reduction of the fast ion loss by ECRH are investigated in 1997. The hysteresis relation between the amplitude of the perturbation and the pressure gradient is obtained during the internal disruption process. This observation requires a new explanation for this process, which cannot be described by the linear theory. Although ECRH heats the elctrons and creates energetic electrons, the potential profile can be also changed. When the plasma potential becomes more positive, the reduction of the resonant fast ion loss is expected. This process is experimentally confirmed.(2)In TRIQM-1M ion heating have been studied in LHCD plasmas in 1998 The effect of the distortion of the electron velocity distribution function is studied on the ion heating process. It is found that low frequency waves are excited by distorted electron distribution and transfer their energy to ions with perpendicular velocity component.(3)The coupling between bi-directional lower hybrid waves and current carrying electrons are investigated in 1999. It is found that the current drive efficiency for the co-moving electrons shows a non linear response for the power ratio of the bi-directional waves. The abrupt current profile change from a peaked one to a flat one is observed as the ctr-travelling wave power is increased.

这项研究的目的是通过分析局部非均匀扰动的瞬时响应来解决等离子体输运问题。主要研究结果如下：(1)1997年研究了氦加速器E的内部分裂和ECRH降低快离子损失的问题。得到了内部破裂过程中扰动幅度与压力梯度之间的滞后关系。这种观察需要对这一过程作出新的解释，而这不是线性理论所能描述的。虽然ECRH加热电子并产生高能电子，但势能分布也可以改变。当等离子体电势变得更正时，共振快离子损耗有望降低。在1998年用LHCD等离子体进行的TRIQM-1M离子加热实验中，研究了电子速度分布函数的扭曲对离子加热过程的影响。研究发现，低频波被扭曲的电子分布激发，并将其能量传递给具有垂直速度分量的离子。(3)1999年研究了双向低杂波与载流电子之间的耦合。结果表明，同向运动电子的电流驱动效率与双向波的功率比呈非线性关系。随着CTR行波功率的增大，电流分布由峰值突变为平坦。

项目成果

H. Zushi, et al,: "Recent Progress on TRIAM-1M"Nuclear Fsion. (掲載予定). (2000)

H. Zushi 等人：“TRIAM-1M 的最新进展”（即将出版）。

H. Zushi, et al,: "High Ion Temperature Discharge and Its Long Sustainment In Both Limiter and Single-Null Configurations on TRIMA"Nuclear Fusion. 39. 1955-1963 (1999)

H. Zushi 等人：“TRIMA 核聚变的限制器和单零配置中的高离子温度放电及其长期维持”。

H. Zushi, et al,: "High Ion Temperature Discharge and Its Long Sustainment In the Single-Null Configuration on TRIAM-1M"17th IAEA Int. Conference on Fusion Energy. EXP2-16 (1998)

H. Zushi 等人：“TRIAM-1M 上单空配置中的高离子温度放电及其长期持续”第 17 届 IAEA Int.

Y. Kurimoto, H. Zushi, et al: "'Investigation of ECRH effects on the fast ion slowing-down process and confinement'"Fusion Engineering and Design. 34-35. 539-542 (1997)

Y. Kurimoto、H. Zushi 等人：“‘ECRH 对快离子减速过程和限制的影响的调查’”聚变工程与设计。

H. Zushi, M. Hosotsubo, M. Wakatani, et al.: "Self-organaization machanism of the pressure profile at the internal disruption in heliotron plasmas" Plasma Phys. Control. Fusion. 40. 779-784 (1998)

H. Zushi、M. Hosotsubo、M. Wakatani 等人：“日光管等离子体内部破坏时压力分布的自组织机制” Plasma Phys。