Tomography Diagnostic Research of Fast Neutral Particles using Advanced Radiation-resistant Detector in Fusion Plasma

聚变等离子体中快中性粒子先进抗辐射探测器断层扫描诊断研究

• 批准号: 14208056
• 负责人: KUSAMA Yashinori
• 金额: $ 26.21万
• 依托单位: Japan Atomic Researth Institute (JAERI)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14208056/
• 关键词: diamond detector; fast neutral article measurement; JT-60; fusion plasma; neutron; gamma-ray shield; totoidal Alfveneigenmodes (TAE); resonant interaction; LHD; エネルギー較正; 波高分布; TAEモード; エネルギー分布; 多チャンネル化; ダイヤモンド検出; 波高分析; γ線遮蔽

1. Fast neutral particles were measured using diamond detectors in the plasma confinement devise(LHD, NIFS). Different energy spectra of them were observed for deferent sightlines. Optical lights influenced on the spectrum measured at the periphery. It has shown that careful design of apertures is important when a multi-channel detector system is established.2. In order to measure fast neutral particles under the neutron/γ-ray environment of the fusion plasma confinement device (JT-60; JAERI), neutronl/γ-ray shield has been designed for reducing neutron/γ-ray background (noise) b y one order.3. The noise has been successfully reduced expectedly by covering the diamond detector by the neutron/γ-ray shield. Adding to this, adjusting the neutral fluxes for experimental conditions by changing the size of the aperture has enabled to measure fast neutral particles even under the neutron radiation circumstance. These results were published in Review of Scientific Instruments.4. A rapid transport of fast ions from the central region to the region has been successfully peripheral observed in a full energy range with the diamond detector system when toroidal Alfven eigenmodes (TAE) ions are excited by energetic produced with high energy neutral beam injection. It has been confirmed for the first time that neutral fluxes are increased in a limited energy range of 100〜370 keV and the energy spectrum has a peak at 〜250 keV. Moreover we have found that the energy range agrees with that predicted from the resonant interaction between fast ions and TAE. These results have been presented at the 20th IAEA Fusion Energy Conference (2005, Vilamaura, Portugal) and the paper has been submitted to Nuclear Fusion.5. Possible simultaneous measurement using four diamond detectors has been confirmed. More detailed investigation of fast ions is expected in a near future.

1。在血浆中测量的颗粒（LHD，NIFS）用于递延的视线融合等离子体限制装置（JT-60; JAERI），已设计用于将中子/次数降低的中子/γ射线屏蔽。3。为此，通过孔径的大小增加了实验条件的中性通量，即使在中子辐射的情况下也能够测量快速的中性。当探测器系统范围内，用高能量中性束注射产生的环形Alfven特征模（TAE）IC已确认第一个滴定通量在有限的能量范围内增加了。此外，我们发现了快速离子和TAE之间的相互作用的能量范围。 OND探测器已被确认。

项目成果

Energetic particle physics in JT-60U and JFT-2M

JT-60U 和 JFT-2M 中的高能粒子物理

• 发表时间: 2004
• 期刊: Plasma Physics and Controlled Fusion 46 (7)
• 作者: Y.Shiozaki;Y.Todo;Y.Todo et al.;K.Shinohara et al.
• 通讯作者: K.Shinohara et al.

Charge Exchange Neutral Particle Measurements with Natural Diamond Detector under the DD Neutron Field on JT 60U Tokamak

JT 60U 托卡马克 DD 中子场下天然金刚石探测器的电荷交换中性粒子测量

• 发表时间: 2004
• 期刊: Review of Scientific Instrument 75
• 作者: M.Ishikawa;et al.
• 通讯作者: et al.

Charge Exchange Neutral Particle Measurements with Natural Diamond Detector under the DD Neutron Field on JT-60U Tokamak

JT-60U 托卡马克 DD 中子场下天然金刚石探测器的电荷交换中性粒子测量

• 发表时间: 2004
• 期刊: Review of Scientific Instrument 75
• 作者: Sakata;Y.;K.Hiruta;H.Fujiwara;M.Kamogawa;M.Ishikawa
• 通讯作者: M.Ishikawa