中國先進研究堆中子束應用關鍵技術及若干科學問題年度報告（2013年）

武梅梅 韓松柏 陳東風

摘 要：該年度完成的成果有：（1）中子單色器及準直器性能優化；完成中子衍射樣品室及高溫爐的物理設計；合成出儲氫材料，并完成相組成分析及晶體結構的初步測試；實現64路3He管陣列探測系統數據采集自動化及一維位置靈敏探測器數據采集自動化；（2）開展了LiMnxFe1-xPO4和NaZn13中子衍射研究，FeSexTe1-x和BaFe2-xNixAs2單晶非彈性中子散射；（3）提拉法生長了成分均一的近化學計量比鈮酸鋰單晶及其他，合成并篩選硼酸鹽、鈣鈦礦等新型多晶材料，對其晶體結構和性能進行了測試；（4）采用熔煉、快淬和燒結等方法制備磁性材料，首次運用傳統HDDR工藝成功制備了高各向異性的Pr13Fe80B7磁粉，在該工藝過程中首次發現了高度有序的柱狀歧化微結構；（5）完成了中子殘余應力譜儀的安裝和光學方法調試，制備出鋼、鋁材料標準樣品；開展有限元模擬；（6）完成核燃料元件中子成像檢測裝置初步設計、間接成像轉換屏研制。完成快速中子實時成像裝置調研與設計。搭建熱中子轉換屏加工平臺。完成含典型缺陷的先進材料樣品的制備。開發了中子斷層成像投影模擬程序和圖像重建程序，進行了編碼源中子成像初步實驗。

關鍵詞：中國先進研究堆 中子散射技術 先進功能材料 殘余應力 中子成像

Annual Report of Neutron Beam Application on China Advanced Research Reactor

Wu Meimei Han Songbai Chen Dongfeng

（China Institute of Atomic Energy）

Abstract：The achievements in this year are as follows： （1）The optimization of neutron monochromator and collimator have been finished， and the physical design of sample can and high temperature furnace have been completed. We have synthesized hydrogen storage materials and investigated the phase composition and crystal structure. The automatic data acquisition of 64 3He detection system and the one dimension position sensitive detector was achieved；（2）LiMnxFe1-xPO4 and NaZn13 were investigated using neutron diffraction， and single crystal FeSexTe1-x and BaFe2-xNixAs2 were studied using inelastic neutron scattering；（3）Stoichiometric homogeneous lithium niobate single crystals and new borate and perovskite polycrystalline materials were prepared， and their crystal structure and properties were investigated；（4）Magnetic materials were prepared by melting， rapid quenching and sintering method. Pr13Fe80B7 powder with high anisotropy was prepared first by using the traditional HDDR process successfully， and the highly ordered columnar dismutation micro structure was first discovered in the process；（5）The installation and cold commission of neutron residual stress diffractometer have been completed. Standard samples of steel and aluminum material were prepared. The finite element simulation was carried out；（6）The preliminary design of nuclear fuel element neutron imaging detection device and indirect imaging conversion screen has been finished. The design of real-time neutron imaging was completed. A thermal neutron converter processing platform was set up. The advanced material samples with typical defects were prepared. The programs of project simulation and imaging reconstruction for neutron tomography were developed， and the preliminary experiments of coded source neutron imaging were performed.

Key Words：China advanced research reactor； Neutron scattering； Condensed matter； Residue stress； Neutron imaging

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