The design of 2/8-type high-pressure cell applied to in situ neutron diffraction  

作　　者：Chun-Jiang Xiang Qi-Wei Hu Qiang Wang Lei Xie Xi-Ping Chen Lei-Ming Fang Duan-Wei He 向春江;胡启威;王强;谢雷;陈喜平;房雷鸣;贺端威(Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China)

机构地区：[1]Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China [2]Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China

出　　处：《Chinese Physics B》2019年第7期188-192,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11427810);the National Key Research and Development Program of China(Grant No.2016YFA0401503);the Project for Science and Technology Plan of Sichuan Province,China(Grant No.2015GZ0053)

摘　　要：The DIA-type Kawai cell possesses a larger volume and a quasi-hydrostatic pressure environment and has been widely used in materials’ synthesis and x-ray diffraction experiments.However, few high-pressure in situ neutron diffraction experiments were performed in the DIA-type Kawai cell because there is no wide window for neutron diffraction and the second-stage anvils and guild block material attenuates the neutron signal significantly.In this work, we tentatively modified the normal DIA-type Kawai cell(MA 2-6-8) into a MA 2-8 mode by removing the six first-stage tungsten carbide anvils.As a consequence, the eight tungsten carbide anvils(Kawai cell) are directly driven by the guide blocks.The results of ex situ and in situ pressure calibration show that the cell pressure can reach 5 GPa with small truncation edge lengths(TEL) of 3 mm even at the load of 300 kN.It suggests that this MA 2-8 cell may open a new way for high-pressure and high-temperature in situ neutron diffraction.The DIA-type Kawai cell possesses a larger volume and a quasi-hydrostatic pressure environment and has been widely used in materials’ synthesis and x-ray diffraction experiments.However, few high-pressure in situ neutron diffraction experiments were performed in the DIA-type Kawai cell because there is no wide window for neutron diffraction and the second-stage anvils and guild block material attenuates the neutron signal significantly.In this work, we tentatively modified the normal DIA-type Kawai cell(MA 2-6-8) into a MA 2-8 mode by removing the six first-stage tungsten carbide anvils.As a consequence, the eight tungsten carbide anvils(Kawai cell) are directly driven by the guide blocks.The results of ex situ and in situ pressure calibration show that the cell pressure can reach 5 GPa with small truncation edge lengths(TEL) of 3 mm even at the load of 300 kN.It suggests that this MA 2-8 cell may open a new way for high-pressure and high-temperature in situ neutron diffraction.

关 键 词：DIA-type apparatus Kawai-type cell in SITU NEUTRON DIFFRACTION 

分 类 号：O4[理学—物理]