Establishment of Modeling of Hydrogen Isotopes Recycling in Plasma Facing Material for Control of the D-T Burning Experiments

等离子体面层材料中氢同位素循环模型的建立用于控制 D-T 燃烧实验

• 批准号: 05558067
• 负责人: MORITA Kenji
• 金额: $ 3.71万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05558067/
• 关键词: Hydrogen Isotopes; Hydrogen Recycling; D-T Burning Experiment; Graphite; Elastic Recoil Detection; Isotope Effect; Hydrogen Retention; Hydrogen Re-emission; D-T反応; 炉壁材料; イオンビーム分析法; 水素の捕捉

Goal of this project is to clarify the elementary processes in the retention and reemission of hydrogen isotopes for plasma facing materials and to establish the model describing their dynamic transport in the materials for prediction and evaluation of hydrogen recycling rates during H^+ and D^+ dual irradiations.In 1993 and 1994, we have following tasks for graphite materials concerning this project.1) The mass balance equations describing the transport of hydrogen isotopes in graphite during single hydrogen ion irradiation have been proposed and the rate constants of the elementary process involved are reviewed. The mass balance quations for dial H^+ and D^+ irradiations have been proposed.2) The energy dependence of the depth profiles and the peak concentrations of hydrogen refained in graphite by implantation with H_2^+ ion beams at energies 0.2-5.0keV has been measured by means of the elastic recoil detector (ERD) technique. The steady state depth profile and peak concentrations a … More re found to be well explained in terms of the solution of the mass balance equations proposed.3) The MeV He^+ ion-induced re-emission of hydrogen isotopes (H,D) from graphite implanted with 5 KeV H_2^+ or D_2^+ ion beams upto saturation at room temperature were measured by means of the ERD technique and the He^+ ion induced detrapping crosssection and the ratio of the local molecular recombination rate to the trapping rate were defermined. It is found that the isotope ratio of the latter values for H to D is about 2 which was reasonably well explained in terms of the diffusion-limited reaction model.4) The retention curves of H and D in graphite irradiated simultaneously withH_2^+ and D_2^+ ion beams at room temperature were measured under the condition that both projected range are the same. The isotope ration of the saturation concentrations of D to H was found to be 1.7 which was excellently well explained by the solution of the mass balance equations for the H^+ and D^+ dual irradiations proposed and the rate constants of elementary processes based on the diffusion-limites reaction model. Less

本计画的目标是阐明氢同位素在面向电浆材料中的滞留与再释放的基本过程，并建立描述氢同位素在材料中动态输运的模型，以预测与评估H^+与D^+双重辐照时的氢再循环率。关于本项目石墨材料，我们有以下任务：1）本文提出了描述单氢离子辐照时氢同位素在石墨中输运的质量平衡方程，并计算了基元过程的速率常数参与审查。（2）用弹性反冲探测器（ERD）技术测量了能量为0.2-5.0keV的H_2^+离子注入石墨后氢的深度分布和峰浓度随能量的变化。稳态深度剖面和峰值浓度a ...更多信息 3）MeV He^+离子诱导的氢同位素（H，用ERD技术测量了室温下5 KeV H_2^+或D_2^+离子注入石墨达到饱和时的D_（？）测定了离子诱导脱陷截面和局域分子复合率与俘获率的比值。发现H与D的同位素比值约为2，这可用扩散限制反应模型来解释。4）在室温下，在H_2 ^+和D_2^+离子束同时辐照下，测量了石墨中H和D的保留曲线。通过求解H^+和D^+双辐照的质量平衡方程和基于扩散限制反应模型的基元反应速率常数，很好地解释了D与H的饱和浓度同位素比为1.7。少

项目成果

森田健治: "Dymamic Behavior of Hydrogen Isotopes Implanted into Graphite studied by Means of Ion Beam Analysis Techniques" Memoirs.Facult.Eng.Nagoya Univ. 45. 57-104 (1993)

Kenji Morita：“通过离子束分析技术研究注入石墨的氢同位素的动态行为”Memoirs.Facult.Eng.Nagoya Univ. 45. 57-104 (1993)

K.Morita and B.Tsuchiya: "Dynamic Behavior of Hydrogen Isotopes Implanted into Graphite, Proc.2nd Japan/China Symp.Mater.for Advanced Energy Systems and Fission and Fusion Eng." Sanjyo-Kaikan, Univ.of Tokyo, Tokyo, Japan. 156-161 (1994)

K.Morita 和 B.Tsuchiya：“注入石墨的氢同位素的动态行为，Proc.2nd Japan/China Symp.Mater.for Advanced Energy Systems and Fission and Fusion Eng”。

B.Tsuchiya and K.Morita: "Thermal Re-emission of Hydrogen Isotopes from Graphite in the High Temperature Regime above 1000K" J.Nucl.Mater.(in print). (1995)

B.Tsuchiya 和 K.Morita：“1000K 以上高温状态下石墨中氢同位素的热再发射”J.Nucl.Mater.（​​印刷版）。

森田健治: "Dynamic Behavior of Hydrogen Isotopes Implanted into Graphite studied by Means of Ion Beam Analysis Techniques" Memoirs Facult Eng.,Nagoya Univ.45. 57-104 (1993)

Kenji Morita：“通过离子束分析技术研究的氢同位素注入石墨的动态行为”Memoirs Facult Eng.，Nagoya Univ.45 (1993)。

土屋文: "Energy Dependence of MeV He^+ Ion-Induced Re-emission of Hydrogen Isotopes Implanted into Graphite" J.Nucl.Sci.Technol.33. 1301-1307 (1994)

Aya Tsuchiya：“植入石墨中的 MeV He^+ 离子诱导的氢同位素再发射的能量依赖性”J.Nucl.Sci.Technol.33 (1994)。