物理学报Issue(7)：1-8,8.DOI:10.7498/aps.64.074201
准随机矩形孔阵列透射光栅
Qusia-random rectangular holes self-supporting transmission grating
摘要
Abstract
Support-mesh structures of a self-supporting transmission grating may decrease the transmission area and diffraction efficiency, thus exert a ill effect on the original diffraction pattern of the grating and make it complicated to apply, especially in soft X-ray region. To solve this problem, we put forward a method to realize a kind of totally self-supporting transmission grating by arranging the rectangular transmission holes in a high Z foil quasi-randomly. Based on Fraunhofer’s diffraction theory, we make a theoretical analysis on the diffraction pattern of this new kind of grating. We also calculate the diffraction pattern of this new kind of grating based on the Kirchhoff’s diffraction theory. Further more, we fabricate a sample grating of 1000 lines/mm using a focused ion beam (FIB) technology and then test it with the beam line 4B7B on the Beijing synchrotron radiation facility. Theoretical analysis and experimental result both show that the diffraction of the transmission grating can remove the ill effect of the support-mesh structures by using this newly designed method. Such a method can profit us in applications of this kind of X-ray dispersive element to a wide extent.关键词
透射光栅/软X射线/激光等离子体诊断/惯性约束聚变Key words
transmission grating/soft X-ray/laser-plasma diagnosis/inertial confinement fusion引用本文复制引用
刘钰薇,曹磊峰,张文海,张继成,范全平,魏来,晏卓阳,赵屹东,崔明启,邱荣..准随机矩形孔阵列透射光栅[J].物理学报,2015,(7):1-8,8.基金项目
国家重大仪器设备开发专项(批准号:2012YQ130125)和国家自然科学基金(批准号:11375160)资助的课题 （批准号:2012YQ130125）
