Author: Shi, X.
Paper Title Page
WEOPMA04 Mechanical Design of a New Precision Alignment Apparatus for Compact X-ray Compound Refractive Lens Manipulator 168
 
  • D. Shu, J.W.J. Anton, L. Assoufid, W.C. Grizolli, Z. Islam, S.P. Kearney, P. Kenesei, S.D. Shastri, X. Shi
    ANL, Argonne, Illinois, USA
  • J.W.J. Anton
    University of Illinois at Chicago, Chicago, USA
 
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
A prototype of compact x-ray compound refractive lens (CRL) manipulator system has been developed at the Argonne National Laboratory for dark-field imaging of multi-scale structures. This novel full-field imaging modality uses Bragg peaks to reconstruct 3D distribution of mesoscopic and microscopic structures that govern the behavior of functional materials, in particular, thermodynamic phase transitions in magnetic systems. At the heart of this microscopy technique is a CRL-based x-ray objective lens* with an easily adjustable focal length to isolate any region of interest, typically in the energy range of 5-100 keV or higher, with high precision positional and angular reproducibility. Since the x-ray CRL manipulator system for this technique will be implemented on a high-resolution diffractometer detector arm that rotates during diffraction studies, compactness and system stability, along with the ability to change focal length (zooming), became key design requirements for this new CRL manipulator system. The mechanical design of the compact x-ray CRL manipulator system, as well as finite element analyses for its precision alignment apparatus are described in this paper.
* http://www.rxoptics.de/intro.html
 
slides icon Slides WEOPMA04 [4.189 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEOPMA04  
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WEPH16 Thermal Analysis of High Heat Load Mirrors for the in-Situ Nanoprobe Beamline of the APS Upgrade 238
 
  • J.J. Knopp, M.V. Fisher, Z. Liu, J. Maser, R. Reininger, X. Shi
    ANL, Argonne, Illinois, USA
 
  The Advanced Photon Source (APS) is currently in the process of upgrading to a multi-bend achromat (MBA) storage ring, which will increase brightness and coherent flux by several orders of magnitude. The planned In-Situ Nanoprobe (ISN) beamline, one of the feature beamlines of the APS Upgrade (APS-U) project, is a 220 m long beamline that aims to focus the x-ray beam to a spot size of 20 nm or below by focusing with a KB pair. A double-mirror system, consisting of a high heat load mirror and a pink beam mirror, is designed to provide high harmonic rejection, reduce the power transmitted to the monochromator, and focus the beam along the vertical direction to a beam-defining aperture (BDA). One of the key issues is to manage the high power and power density absorbed by these mirrors. To attain the best focus at the BDA, the pink beam mirror needs to be mechanically bent to correct for thermal deformations on both mirrors. In this paper we report on the thermal responses of the mirror system to different undulator tunings and cooling schemes as calculated with Finite Element Analysis (FEA) and optical ray tracing.  
poster icon Poster WEPH16 [0.742 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH16  
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THPH27 Mechanical Design of a Compact Non-invasive Wavefront Sensor for Hard X-rays 394
 
  • S.P. Kearney, L. Assoufid, W.C. Grizolli, T. Kolodziej, K. Lang, A. Macrander, X. Shi, D. Shu, Yu. Shvyd'ko, W. Wojcik
    ANL, Argonne, Illinois, USA
 
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DEAC02-06CH11357.
Abstract This work describes mechanical design of a prototype compact wavefront sensor for in situ measurement and monitoring of beam wavefront of hard x-ray beamlines [1]. The system is based on a single-shot grating interferometer [2, 3] and a thin diamond single-crystal beam splitter. The beam splitter is designed to be inserted in the incident and oriented to diffract a fraction of the incident beam bandwidth into the interferometer, for wavefront measurement and reconstruction. The concept is intended to study the feasibility of a non-invasive wavefront sensor for real time wavefront monitoring and diagnostics, with possible application in adaptive mirrors for wavefront preservation and control [1, 4]. The design focus was on compactness to enable easy portability and implementation in a beamline.
* L. Assoufid et al., Rev. Sci. Instrum., 87(5), 052004, 2016
** W. Grizolli et al., SPIE Proc., 1038502, 2017
*** S. Marathe et al., Adaptive X-Ray Optics III, SPIE Proc., 92080D, 2014
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH27  
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