Development of alpha particle measurement method by beam neutralization method

开发利用射束中和法的α粒子测量方法

• 批准号: 16082201
• 负责人: SASAO Mamiko
• 金额: $ 163.33万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16082201/
• 关键词: 中性粒子ビーム; イオンビーム; 負イオンビーム; アルファ粒子計測; 荷電変換; 準安定状態; 核融合; プラズマ

As a realistic and promising method to diagnose alpha particles produced in a DT self-sustaining burning plasma, a "beam probe charge exchange system" was designed applicable to the DT experiments on International Thermonuclear Experimental Reactor (ITER). This method can achieve the desired S/N level if the incident ground state He^0 beam is produced through an auto-detachment of an 1-2 MeV He^- beam of 10 mA. Considering the conversion efficiency from He^+ to He^-, a strong focusing He+ beam was designed and constracted. A beam current of more than 2 A was obtained at acceleration voltages of 20-25 kV with a beam radius about 2cm at the designed beam waist, where a conversion alkali-vapor cell would be located. For the He^0 production, a test stand device was built and a ground state He^0 beam was successfully generated through the "free flight method". In summary, the principle and the engineering feasibility of "beam probe charge exchange system" has been proved.

设计了一种适用于国际热核聚变实验堆（ITER）DT实验的“束流探针电荷交换系统”，作为诊断DT自持燃烧等离子体中产生的α粒子的一种现实而有前途的方法。如果入射的基态He ^0束是通过10 mA的1-2 MeV He^-束的自动分离产生的，则该方法可以达到所需的信噪比水平。考虑到He^+到He^-的转换效率，设计并实现了强聚焦He+束流。在加速电压为20-25 kV，束流半径为2cm的情况下，在碱蒸气转换池的设计束腰处获得了大于2A的束流。在He ^0的生产中，建立了一个试验台装置，并通过“自由飞行法”成功地产生了基态He ^0束流。总之，证明了“束探针电荷交换系统”的原理和工程可行性。

项目成果

Development and irradiation test of lost alpha detection system for ITER

ITER损失α探测系统研制及辐照试验

• 发表时间: 2010
• 期刊: Review of Scientific Instruments
• 影响因子: 1.6
• 作者: M.Nishiura;et al.
• 通讯作者: et al.

High density helicon source for beam attenuating target

用于光束衰减目标的高密度螺旋源

• 发表时间: 2009
• 期刊: Journal of Plasma and Fusion Research SERIES Vol.9
• 作者: A.Okamoto;T.Isono;T.Kobuchi;S.Kitajima;A.Okamoto;T.Isono;T.Nishiuchi;H.Takahashi;S.Kitajima;M.Sasao
• 通讯作者: M.Sasao

Study of the Beam Transport in a High-Energy Neutral Helium Beam System with Double Charge Exchange Cell

双电荷交换池高能中性氦束流系统中的束流传输研究

• 发表时间: 2009
• 期刊: Journal of Plasma and Fusion Research SERIES Vol.8
• 作者: M.Kikuchi;N.Tanaka;T.Nagamura;T.Kobuchi;A.Okamoto;S.Kitajima;M.Sasao;H.Ymaoka;M.Wada
• 通讯作者: M.Wada

Development of an Energetic He0 Beath Injector for Fusion Application

开发用于聚变应用的高能 He0 Beath 注射器

• 发表时间: 2008
• 期刊: Proceedings of 22th IAEA Fusion Energy Conference IAEA-CN-165/FT/
• 作者: M. Sasao;et.al
• 通讯作者: et.al

Proof of Principle Experiment of a Fast He^0 Beam Production

快速 He^0 光束产生的原理实验证明

• 发表时间: 2007
• 期刊: Plasma Fusion Res. Vol.2
• 作者: N.Tanaka;H.Sugawara;S.Takeuchi;S.Asakawa;A.Okamoto;K.Shinto;S.Kitajima;M.Sasao;M.Wada
• 通讯作者: M.Wada