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Title: Contrast and stability improvements for XPCS measurements at beamline 8-ID-I at the APS.

Abstract

We have embarked upon a systematic program to optimize all aspects of small-angle-x-ray-scattering x-ray photon-correlation spectroscopy experiments performed at beamline 8-ID-I at the Advanced Photon Source (APS). We describe two recent efforts, namely better synchronized CCD shutter control and a re-engineered experiment station layout that has resulted in a 70% increase in optical contrast and a greater than 300% increase in experiment stability. Together these two improvements extend the dynamic range of time scales that can be probed at APS beamline 8-ID-I by one decade.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
970767
Report Number(s):
ANL/XSD/CP-118666
TRN: US1000897
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 9th International Conference on Synchrotron Radiation Instrumentation (SRI 2006); May 28, 2006 - Jun. 2, 2006; Seoul, Korea
Country of Publication:
United States
Language:
ENGLISH
Subject:
43 PARTICLE ACCELERATORS; ADVANCED PHOTON SOURCE; SHUTTERS; SPECTROSCOPY; STABILITY; SYNCHROTRON RADIATION

Citation Formats

Sandy, A. R., Jiao, X., Narayanan, S., Sprung, M., and X-Ray Science Division. Contrast and stability improvements for XPCS measurements at beamline 8-ID-I at the APS.. United States: N. p., 2007. Web. doi:10.1063/1.2436206.
Sandy, A. R., Jiao, X., Narayanan, S., Sprung, M., & X-Ray Science Division. Contrast and stability improvements for XPCS measurements at beamline 8-ID-I at the APS.. United States. doi:10.1063/1.2436206.
Sandy, A. R., Jiao, X., Narayanan, S., Sprung, M., and X-Ray Science Division. Mon . "Contrast and stability improvements for XPCS measurements at beamline 8-ID-I at the APS.". United States. doi:10.1063/1.2436206.
@article{osti_970767,
title = {Contrast and stability improvements for XPCS measurements at beamline 8-ID-I at the APS.},
author = {Sandy, A. R. and Jiao, X. and Narayanan, S. and Sprung, M. and X-Ray Science Division},
abstractNote = {We have embarked upon a systematic program to optimize all aspects of small-angle-x-ray-scattering x-ray photon-correlation spectroscopy experiments performed at beamline 8-ID-I at the Advanced Photon Source (APS). We describe two recent efforts, namely better synchronized CCD shutter control and a re-engineered experiment station layout that has resulted in a 70% increase in optical contrast and a greater than 300% increase in experiment stability. Together these two improvements extend the dynamic range of time scales that can be probed at APS beamline 8-ID-I by one decade.},
doi = {10.1063/1.2436206},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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  • We have embarked upon a systematic program to optimize all aspects of small-angle-x-ray-scattering x-ray photon-correlation spectroscopy experiments performed at beamline 8-ID-I at the Advanced Photon Source (APS). We describe two recent efforts, namely better synchronized CCD shutter control and a re-engineered experiment station layout that has resulted in a 70% increase in optical contrast and a greater than 300% increase in experiment stability. Together these two improvements extend the dynamic range of time scales that can be probed at APS beamline 8-ID-I by one decade.
  • Sector 1-ID at the APS accommodates a number of dif-ferent experimental techniques in the same spatial enve-lope of the E-hutch end station. These include high-energy small and wide angle X-ray scattering (SAXS and WAXS), high-energy diffraction microscopy (HEDM, both near and far field modes) and high-energy X-ray tomography. These techniques are frequently combined to allow the users to obtain multimodal data, often attaining 1 μm spatial resolution and <0.05º angular resolution. Furthermore, these techniques are utilized while the sam-ple is thermo-mechanically loaded to mimic real operat-ing conditions. The instrumentation required for each of these techniques and environments has been designedmore » and configured in a modular way with a focus on stability and repeatability between changeovers. This approach allows the end station to be more versatile, capable of collecting multi-modal data in-situ while reducing time and effort typically required for set up and alignment, resulting in more efficient beam time use. Key instrumentation de-sign features and layout of the end station are presented.« less
  • Third-generation synchrotron x-ray facilities, such as the Advanced Photon Source, produce x-ray beams that generate a very high heat flux in a very small area. In order to preserve the brilliance of the source, optical components have to be designed to undergo very small thermal deformation (or a change of slope of a flat surface). When an optical component is subjected to a heat load, there will be thermal deformation caused by a temperature increase from the initial state. For a plate-like structure, the temperature difference over the thickness causes bending, and the average temperature increment causes axial deformation. Formore » an optical element, the slope change due to bending is the main reason for the degradation of the performance of the optical component. The change of slope should be limited to a few microradians. There are many ways to control the thermal deformation, such as cryogenic cooling, inclined geometry, liquid-metal cooling, pin-posts or microchannels, using a high-heat-conductivity material, such as diamond, etc. In an accompanying conference paper, an adaptive design technique has been proposed to make use of a novel self-adapted smart structure. Its performance is essentially independent of the heat-load intensity. When such a device is exposed to a heat load, the flat surface remains flat in the area of interest. Therefore this technique can potentially be used to achieve a high precision optical component. Application of the proposed design technique to the monochromator for the SRI-CAT Sector 2 insertion device beamline (Sector 2-ID-E) is explained, and initial analytical results are presented on its performance. {copyright} {ital 1996 American Institute of Physics.}« less
  • This paper presents the first series of round-robin metrology measurements of x-ray mirrors organized at the Advanced Photon Source (APS) in the USA, the European Synchrotron Radiation Facility in France, and the Super Photon Ring (SPring-8) (in a collaboration with Osaka University, ) in Japan. This work is part of the three institutions' three-way agreement to promote a direct exchange of research information and experience amongst their specialists. The purpose of the metrology round robin is to compare the performance and limitations of the instrumentation used at the optical metrology laboratories of these facilities and to set the basis formore » establishing guidelines and procedures to accurately perform the measurements. The optics used in the measurements were selected to reflect typical, as well as state of the art, in mirror fabrication. The first series of the round robin measurements focuses on flat and cylindrical mirrors with varying sizes and quality. Three mirrors (two flats and one cylinder) were successively measured using long trace profilers. Although the three facilities' LTPs are of different design, the measurements were found to be in excellent agreement. The maximum discrepancy of the rms slope error values is 0.1 {micro}rad, that of the rms shape error was 3 nm, and they all relate to the measurement of the cylindrical mirror. The next round-robin measurements will deal with elliptical and spherical optics.« less
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