Development of neutron tomography under pressure: 3D distribution of fluid in the mantle minerals

在本研究中，我们开发了高压中子计算机断层扫描（CT）技术，以揭示地幔矿物中H2O流体的原位三维分布。便携式PE压机安装了用于CT测量的新设计的加热和压缩系统。在J-PARC中子装置上优化了中子成像的光学装置，研究了样品材料及其尺寸对成像对比度的影响。采用该系统对含水和无水矿物样品进行了中子层析测量。该系统能够在高压和高温下进行中子成像和层析成像测量

In this study, we have developed neutron computed-tomography（CT) technique under high pressure in order to reveal in situ 3D distribution of H2O fluid in the mantle minerals. Newly designed heating and compress systems for CT measurement have been installed to the portable PE press. Optical set-up for neutron imaging was optimized at J-PARC neutron facility and the effects of sample material and its size on the image contrast were investigated. Neutron tomography measurement for hydrous and anhydrous mineral samples was carried out using new system. The present new system able us to perform neutron imaging and tomography measurements under high pressure and temperature