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Title: High-Resolution Monochromators for Nuclear Resonant Scattering Developed at BL09XU, SPring-8

Abstract

Various kinds of high-resolution monochromators which have the energy resolution ({delta}E/E) of {approx} 10-7 in X-rays region, have been developed at Nuclear Resonant Scattering Beamline BL09XU, SPring-8. They were designed at the nuclear transition energies of 181Ta (6.2 keV), 57Fe (14.4 keV), 151Eu (21.5 keV), 149Sm (22.5 keV), 40K (29.8 keV) and 121Sb (37.1 keV). All of these developed monochromators worked well and have been utilized for user experiments of nuclear resonant scattering.

Authors:
 [1];  [2];  [3];  [1]
  1. Japan Synchrotron Radiation Institute, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198 (Japan)
  2. (Japan)
  3. Institute of Materials Structure Science, KEK, Tsukuba, Ibaraki 305-0801 (Japan)
Publication Date:
OSTI Identifier:
21052673
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436213; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ANTIMONY 121; ENERGY RESOLUTION; EUROPIUM 151; IRON 57; KEV RANGE; MONOCHROMATORS; PHOTON BEAMS; RESCATTERING; RESONANCE SCATTERING; SAMARIUM 149; SPRING-8 STORAGE RING; SYNCHROTRON RADIATION; SYNCHROTRON RADIATION SOURCES; TANTALUM 181

Citation Formats

Yoda, Yoshitaka, Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi-shi, Saitama 332-0012, Zhang, Xiaowei, and Kikuta, Seishi. High-Resolution Monochromators for Nuclear Resonant Scattering Developed at BL09XU, SPring-8. United States: N. p., 2007. Web. doi:10.1063/1.2436213.
Yoda, Yoshitaka, Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi-shi, Saitama 332-0012, Zhang, Xiaowei, & Kikuta, Seishi. High-Resolution Monochromators for Nuclear Resonant Scattering Developed at BL09XU, SPring-8. United States. doi:10.1063/1.2436213.
Yoda, Yoshitaka, Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi-shi, Saitama 332-0012, Zhang, Xiaowei, and Kikuta, Seishi. Fri . "High-Resolution Monochromators for Nuclear Resonant Scattering Developed at BL09XU, SPring-8". United States. doi:10.1063/1.2436213.
@article{osti_21052673,
title = {High-Resolution Monochromators for Nuclear Resonant Scattering Developed at BL09XU, SPring-8},
author = {Yoda, Yoshitaka and Japan Science and Technology Agency, 4-1-8, Honcho, Kawaguchi-shi, Saitama 332-0012 and Zhang, Xiaowei and Kikuta, Seishi},
abstractNote = {Various kinds of high-resolution monochromators which have the energy resolution ({delta}E/E) of {approx} 10-7 in X-rays region, have been developed at Nuclear Resonant Scattering Beamline BL09XU, SPring-8. They were designed at the nuclear transition energies of 181Ta (6.2 keV), 57Fe (14.4 keV), 151Eu (21.5 keV), 149Sm (22.5 keV), 40K (29.8 keV) and 121Sb (37.1 keV). All of these developed monochromators worked well and have been utilized for user experiments of nuclear resonant scattering.},
doi = {10.1063/1.2436213},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • The investigation of accurate structure at charge density level will not only understand the function mechanism of physical property but also lead to design new functional materials. We have successfully installed large cylindrical camera at the BL02B1/SPring-8. In conceptual design, the image plate (IP) was selected as the detector, because such IP will not only detect wide range in one shot but also yield reliable data. In commissioning, the performance of this camera demonstrated to be suitable for the direct observation of d-electron system.
  • No abstract prepared.
  • A new JAEA beamline with an in-vacuum undulator has been constructed at BL22XU in SPring-8. The wide band energy X-rays facilitate crystal structure studies under pressure, resonant X-ray scattering experiments, X-ray absorption fine structure as well as stress measurements. The energy range from 3 to 70keV with a high flux of X-rays has been achieved at the beamline, using two sets of double crystal monochromators equipped with liquid nitrogen cooling Si (111) crystals. The photon flux at 3, 9, 25 and 70keV with {delta}E/E f-dot 10-4 are about 2 x 1010, 3 x 1013, 5 x 1012 and 5 xmore » 1010 photons/sec, respectively. Fluctuations in X-ray intensities and position caused by the liquid nitrogen cooling system have been prevented by using MOSTAB, a feedback control system.« less
  • Several monochromator first silicon crystals of SPring-8 undulator beamlines are effectively cooled with water at lower running costs. The crystals were newly designed and the fabrication process was improved in order to reduce various strains to deteriorate the performance. Results of performance tests show that the initial performance of the crystal has been enhanced sufficiently. Deterioration of the performance with time is discussed as a remaining problem.
  • SPring-8 standard double-crystal monochromators containing water-cooled crystals were stabilized to a sufficient level to function as a part of optics components to supply stable microfocused x-ray beams, by determining causes of the instability and then removing them. The instability was caused by two factors--thermal deformation of fine stepper stages in the monochromator, which resulted in reduction in beam intensity with time, and vibrations of coolant supply units and vacuum pumps, which resulted in fluctuation in beam intensity. We remodeled the crystal holders to maintain the stage temperatures constant with water, attached x-ray and electron shields to the stages in ordermore » to prevent their warming up, introduced accumulators in the water circuits to absorb pressure pulsation, used polyurethane tubes to stabilize water flow, and placed rubber cushions under scroll vacuum pumps. As a result, the intensity reduction rate of the beam decreased from 26% to 1% per hour and the intensity fluctuation from 13% to 1%. The monochromators were also modified to prevent radiation damage to the crystals, materials used as a water seal, and motor cables.« less