Geodynamics Research Center, Ehime University, Matsuyama, Japan.
J Synchrotron Radiat. 2009 Nov;16(Pt 6):742-7. doi: 10.1107/S0909049509033342. Epub 2009 Sep 11.
A modified Drickamer anvil apparatus has been developed to combine with monochromatic synchrotron radiation for high-pressure X-ray diffraction and radiography in the GSECARS bending-magnet station, 13-BM-D, at the Advanced Photon Source, Argonne, USA. Using this experimental set-up, deformation experiments can be carried out at pressures in excess of 30 GPa at high temperatures. Differential stresses and total axial strains of polycrystalline platinum and Mg(2)SiO(4) ringwoodite have been measured up to 32 GPa at room temperature using tungsten carbide anvils. The total axial strain of the platinum increases with pressure and reaches about 55% at the highest pressure. A test run using a composite sintered diamond anvil system was performed. The use of X-ray-tranparent anvils enables the entire Debye rings to be observed up to 10 degrees 2theta. With high-energy photons (65-70 keV), this allows a coverage in Q (= 2pi sintheta/lambda) to about 3 A(-1), thus making it possible to evaluate hydrostatic pressure and differential stress in crystalline minerals using diffraction. This, coupled with the ability to determine axial strain, allows deformation studies to be performed to pressures above 30 GPa.
一种改良的德里卡梅尔砧座装置已经被开发出来，与单色同步辐射相结合，用于在美国阿贡的先进光源 13-BM-D 的 GSECARS 弯曲磁体站进行高压 X 射线衍射和射线照相。使用这种实验装置，可以在超过 30GPa 的高温下进行变形实验。使用碳化钨砧座，在室温下测量了多晶铂和 Mg(2)SiO(4)尖晶石的差应力和总轴向应变，最高压力达到 32GPa。铂的总轴向应变随压力增加而增加，在最高压力下达到约 55%。进行了使用复合烧结金刚石砧座系统的测试运行。使用 X 射线透明砧座可以观察到整个德拜环，最高可达 10 度 2theta。使用高能光子（65-70keV），这允许在 Q（=2pi sintheta/lambda）上覆盖约 3A(-1)，从而可以使用衍射来评估晶体矿物中的静压和差应力。这一点，再加上确定轴向应变的能力，使得能够在 30GPa 以上的压力下进行变形研究。
