skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Design Concept for a High-Resolution Variable Included Angle Grazing Incidence Monochromator with a Varied Line Spacing Grating and a New Optics for Microfocusing

Abstract

A novel design concept for a variable included angle Monk-Gillieson mounting monochromator with a varied line spacing grating is presented and the energy resolution is estimated by using the ray-tracing method. It is indicated that relatively high resolution is achieved even if one scans the photon energy with a fixed included angle. A novel microfocusing system, two-step Kirkpatric-Baez optics, is also proposed. The ray tracing results indicate that a submicron spot size in FWHM is achieved by focusing mirrors with commercially available slope errors at a relatively long working distance. Preliminary results from a prototype system for microfocusing are demonstrated, which shows that a spot size of several {mu}m can be achieved by using cylindrical mirrors only.

Authors:
 [1];  [2]; ;  [3];  [1];  [3];  [2]
  1. Institute of Materials Structure Science, High Energy Accelerator research organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan)
  2. (Japan)
  3. Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan)
Publication Date:
OSTI Identifier:
21052554
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: 10.1063/1.2436099; (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; BEAM OPTICS; CYLINDRICAL CONFIGURATION; DESIGN; DIFFRACTION GRATINGS; ENERGY RESOLUTION; FOCUSING; MIRRORS; MONOCHROMATORS; PHOTONS; X RADIATION

Citation Formats

Amemiya, Kenta, Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Abe, Hitoshi, Miyawaki, Jun, Sako, Erika O., Ohta, Toshiaki, and SR Center, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577. Design Concept for a High-Resolution Variable Included Angle Grazing Incidence Monochromator with a Varied Line Spacing Grating and a New Optics for Microfocusing. United States: N. p., 2007. Web. doi:10.1063/1.2436099.
Amemiya, Kenta, Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Abe, Hitoshi, Miyawaki, Jun, Sako, Erika O., Ohta, Toshiaki, & SR Center, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577. Design Concept for a High-Resolution Variable Included Angle Grazing Incidence Monochromator with a Varied Line Spacing Grating and a New Optics for Microfocusing. United States. doi:10.1063/1.2436099.
Amemiya, Kenta, Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Abe, Hitoshi, Miyawaki, Jun, Sako, Erika O., Ohta, Toshiaki, and SR Center, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577. Fri . "Design Concept for a High-Resolution Variable Included Angle Grazing Incidence Monochromator with a Varied Line Spacing Grating and a New Optics for Microfocusing". United States. doi:10.1063/1.2436099.
@article{osti_21052554,
title = {Design Concept for a High-Resolution Variable Included Angle Grazing Incidence Monochromator with a Varied Line Spacing Grating and a New Optics for Microfocusing},
author = {Amemiya, Kenta and Department of Chemistry, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 and Abe, Hitoshi and Miyawaki, Jun and Sako, Erika O. and Ohta, Toshiaki and SR Center, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577},
abstractNote = {A novel design concept for a variable included angle Monk-Gillieson mounting monochromator with a varied line spacing grating is presented and the energy resolution is estimated by using the ray-tracing method. It is indicated that relatively high resolution is achieved even if one scans the photon energy with a fixed included angle. A novel microfocusing system, two-step Kirkpatric-Baez optics, is also proposed. The ray tracing results indicate that a submicron spot size in FWHM is achieved by focusing mirrors with commercially available slope errors at a relatively long working distance. Preliminary results from a prototype system for microfocusing are demonstrated, which shows that a spot size of several {mu}m can be achieved by using cylindrical mirrors only.},
doi = {10.1063/1.2436099},
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 design and commissioning of a new soft X-ray beamline, BL-16A, at the Photon Factory is presented. The beamline consists of a pre-focusing mirror, an entrance slit, a variable-included-angle varied-line-spacing plane grating monochromator, and a post-focusing system as usual, and provides circularly and linearly polarized soft X rays in the energy range 200-1500 eV with an APPLE-II type undulator. The commissioning procedure for the beamline optics is described in detail, especially the check of the focal position for the zero-th order and diffracted X rays.
  • Comparative studies have been made on the holographic plane grating and the ruled varied-line-spacing (VLS) plane grating designed for two kinds of objective Monk{endash}Gillieson type high-resolution grazing incidence monochromator, I and II. The ray-traced performance of monochromator types I and II on a synchrotron radiation beam line was evaluated in terms of resolving power and spectral purity by the introduction of new concepts of effective Gaussian line and purity profiles. The resolving power defined on the basis of the effective Gaussian profile is consistent with the spectral purity of the beam emerging from the exit slit and is more realisticmore » as compared with those defined in the conventional manner, especially when spectral images have asymmetric profiles. It is concluded that holographic plane gratings recorded with a spherical and an aspheric wave front are capable of providing high resolution with high spectral purity and are fully interchangeable with the corresponding ruled VLS plane gratings. This interchangeability provides more flexibility for users in choosing a proper grating for a high-resolution grazing incidence monochromator of the Monk{endash}Gillieson type. {copyright} 1997 Optical Society of America« less
  • A varied line spacing plane grating monochromator (VLS-PGM) has recently been installed and commissioned on an existing insertion device at the Synchrotron Radiation Center (SRC). The beamline covers the energy range from 70 to 2000 eV and consists of an ellipsoidal mirror, three varied line spacing gratings, an exit slit, and an ellipsoidal refocusing mirror. The beamline is optimized for X-ray PhotoElectron Emission spectroMicroscopy (X-PEEM) experiments by providing high flux density at the sample with moderate energy resolution. The insertion device functions as an undulator up to about 420 eV and as a wiggler at higher energies. Wiggler mode ismore » obtained by positioning the undulator at maximum k, using a large horizontal aperture at the front of the beamline, and tapering the undulator by increasing the upstream gap 100 microns. Experimental results show the beamline is performing very well, with resolution and flux measurements in close agreement with theory.« less
  • A grazing incidence monochromator consisting of a spherical mirror, a varied spacing plane grating, movable plane mirror, and a fixed exit slit has been designed by means of a hybrid design method which takes advantage of both the ray-tracing and analytic methods. In the design, higher-order suppression and on-blaze feature were also taken into consideration. A spectral resolving power of [similar to]30 000--70 000 is expected for the monochromator over a wavelength range of 0.5--10 nm when used on an undulator beamline at the Advanced Light Source.
  • We describe a spectrograph for x-ray laser linewidth measurements in the range 100{endash}220 {Angstrom}. The design employs a plane varied-line-spacing grating operating in the convergent light produced by imaging of the entrance slit with a concave spherical mirror. By the appropriate choice of the linear term in the grating-spacing variation, two separate wavelengths can be focused at the same image distance. As a result all wavelengths within the range of interest are focused at or near the same distance. The spectrograph can be tuned by rotation of the grating to bring any wavelength within the range to the center ofmore » the focal plane, and the spectra are dispersed on a surface that is erect or practically flat and perpendicular to the principal ray. This allows the use of a planar detector. With a streak camera used as a detector, the instrument obtained time-resolved linewidth data on x-ray lasers with a resolving power of 1{times}10{sup 4} to 2{times}10{sup 4}. This paper presents the design methods used to optimize the varied-line-spacing grating, the design of the tunable spectrograph, and the results from the instrument in operation. {copyright} 1997 Optical Society of America« less