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Chin. Phys. B, 2019, Vol. 28(7): 070701    DOI: 10.1088/1674-1056/28/7/070701
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The design of 2/8-type high-pressure cell applied to in situ neutron diffraction

Chun-Jiang Xiang(向春江)1, Qi-Wei Hu(胡启威)1, Qiang Wang(王强)1, Lei Xie(谢雷)2, Xi-Ping Chen(陈喜平)2, Lei-Ming Fang(房雷鸣)2, Duan-Wei He(贺端威)1
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
Abstract  

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.

Keywords:  DIA-type apparatus      Kawai-type cell      in situ neutron diffraction  
Received:  02 April 2019      Revised:  13 May 2019      Published:  05 July 2019
PACS:  07.90.+c (Other topics in instruments, apparatus, and components common to several branches of physics and astronomy)  
  07.35.+k (High-pressure apparatus; shock tubes; diamond anvil cells)  
  29.20.dk (Synchrotrons)  
  29.25.Dz (Neutron sources)  
Fund: 

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), and the Project for Science and Technology Plan of Sichuan Province, China (Grant No. 2015GZ0053).

Corresponding Authors:  Lei-Ming Fang, Duan-Wei He     E-mail:  flmyaya2008@163.com;duanweihe@scu.edu.cn

Cite this article: 

Chun-Jiang Xiang(向春江), Qi-Wei Hu(胡启威), Qiang Wang(王强), Lei Xie(谢雷), Xi-Ping Chen(陈喜平), Lei-Ming Fang(房雷鸣), Duan-Wei He(贺端威) The design of 2/8-type high-pressure cell applied to in situ neutron diffraction 2019 Chin. Phys. B 28 070701

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