中國(guó)先進(jìn)研究堆中子束應(yīng)用關(guān)鍵技術(shù)及若干科學(xué)問題年度報(bào)告（2013年）

武梅梅 韓松柏 陳東風(fēng)

摘 要：該年度完成的成果有：（1）中子單色器及準(zhǔn)直器性能優(yōu)化；完成中子衍射樣品室及高溫爐的物理設(shè)計(jì)；合成出儲(chǔ)氫材料，并完成相組成分析及晶體結(jié)構(gòu)的初步測(cè)試；實(shí)現(xiàn)64路3He管陣列探測(cè)系統(tǒng)數(shù)據(jù)采集自動(dòng)化及一維位置靈敏探測(cè)器數(shù)據(jù)采集自動(dòng)化；（2）開展了LiMnxFe1-xPO4和NaZn13中子衍射研究，F(xiàn)eSexTe1-x和BaFe2-xNixAs2單晶非彈性中子散射；（3）提拉法生長(zhǎng)了成分均一的近化學(xué)計(jì)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(duì)其晶體結(jié)構(gòu)和性能進(jìn)行了測(cè)試；（4）采用熔煉、快淬和燒結(jié)等方法制備磁性材料，首次運(yùn)用傳統(tǒng)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(fā)現(xiàn)了高度有序的柱狀歧化微結(jié)構(gòu)；（5）完成了中子殘余應(yīng)力譜儀的安裝和光學(xué)方法調(diào)試，制備出鋼、鋁材料標(biāo)準(zhǔn)樣品；開展有限元模擬；（6）完成核燃料元件中子成像檢測(cè)裝置初步設(shè)計(jì)、間接成像轉(zhuǎn)換屏研制。完成快速中子實(shí)時(shí)成像裝置調(diào)研與設(shè)計(jì)。搭建熱中子轉(zhuǎn)換屏加工平臺(tái)。完成含典型缺陷的先進(jìn)材料樣品的制備。開發(fā)了中子斷層成像投影模擬程序和圖像重建程序，進(jìn)行了編碼源中子成像初步實(shí)驗(yàn)。

關(guān)鍵詞：中國(guó)先進(jìn)研究堆 中子散射技術(shù) 先進(jìn)功能材料 殘余應(yīng)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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