Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Optics and Precision Engineering》 2007-03
Add to Favorite Get Latest Update

Mechanical property of sagittal focusing crystal and effect of slope error on incidence angle

FENG Liang-jie,DONG Xiao-hao,KANG Le,XU Chao-yin(National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)  
The principle of dynamically bending of the crystal in a sagittal focusing monochramator by flexural hinge-based bender was presented and the geometric parameters of bender and crystal were optimized.Then the mechanical properties of bender and crystal were analyzed with Finite Element Method.Finally,the effect of slop error on the incident angle was calculated.The analyzed results indicate that the acceptance angle of the monochromator increases from 1 mrad to 3 mrad,and the horizontal width(FWHM) of the spot on the sample reduces from 12.5 mm to 2.5 mm after replacement.The anticlastic curvature caused by bending is 1 700 times as long as the sagittal curvature,and the incident angle error is only 2.2 μrad.The Von Mize stress on the bender is about 800 MPa.When Beryllium-Cu is selected as the material of the bender,the linear relationship between the curvature of crystal in 0.57~1.72 m and the driving forces in 8~2.67 N is obtained.The analyzed results also indicate that the designing parameters are achievement in that the flux and photo intensity are increased and the requirement of fast and tunable scanning on the XAFS measurement is satisfied at the same time.
【Fund】: 国家自然科学基金项目(No.10575098)
【CateGory Index】: TL544
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved