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Title: Current status of BL-2B at photon factory

Abstract

A new soft x-ray beamline BL-2B at Photon Factory of High Energy Accelerator Research Organization (KEK-PF) covers energy range from vacuum ultraviolet (30 eV) to soft x-ray (4000 eV). This wide energy range could be achieved by employing two undulators and two monochromators. Two different energy range undulators were installed tandem to a 9-meter straight section of PF storage ring. The 1{sup st} undulator is for VUV (30 eV) to SX (280 eV), while the other one is for SX (280 eV) to HX (4000 eV). It is also necessary to be equipped with two different monochrometors for energy above and under 2000 eV; grating monochrometor and double crystal monochrometor. One of the main purposes of this bemaline is spectroscopic study of light elements contained in several functional materials. The beamline is designed for photoemission spectroscopy (PES), X-ray absorption fine structure (XAFS) and other types of experiments. The performance of the new beamline is reported and typical examples of its application to material science are demonstrated.

Authors:
;  [1]; ; ; ;  [2]
  1. Central Research Laboratory, Hitachi, ltd. 1-280 Higashi-Koigakubo, Kokubunji, Tokyo, 185-8601 (Japan)
  2. KEK-PF 1-1 Oho, Tsukuba, Ibaraki, 305-0801 (Japan)
Publication Date:
OSTI Identifier:
22608377
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ABSORPTION; ABSORPTION SPECTROSCOPY; ACCELERATORS; DESIGN; FAR ULTRAVIOLET RADIATION; FINE STRUCTURE; HARD X RADIATION; KEK; MONOCHROMATORS; PHOTOELECTRON SPECTROSCOPY; PHOTOEMISSION; PHOTONS; SOFT X RADIATION; STORAGE RINGS; WIGGLER MAGNETS; X-RAY SPECTROSCOPY

Citation Formats

Nambu, Akira, E-mail: akia.nambu.tw@hitachi.com, Ueda, Kazuhiro, Horiba, Koji, Tsuchiya, Kimichika, Kumigashira, Hiroshi, and Amemiya, Kenta. Current status of BL-2B at photon factory. United States: N. p., 2016. Web. doi:10.1063/1.4952864.
Nambu, Akira, E-mail: akia.nambu.tw@hitachi.com, Ueda, Kazuhiro, Horiba, Koji, Tsuchiya, Kimichika, Kumigashira, Hiroshi, & Amemiya, Kenta. Current status of BL-2B at photon factory. United States. doi:10.1063/1.4952864.
Nambu, Akira, E-mail: akia.nambu.tw@hitachi.com, Ueda, Kazuhiro, Horiba, Koji, Tsuchiya, Kimichika, Kumigashira, Hiroshi, and Amemiya, Kenta. 2016. "Current status of BL-2B at photon factory". United States. doi:10.1063/1.4952864.
@article{osti_22608377,
title = {Current status of BL-2B at photon factory},
author = {Nambu, Akira, E-mail: akia.nambu.tw@hitachi.com and Ueda, Kazuhiro and Horiba, Koji and Tsuchiya, Kimichika and Kumigashira, Hiroshi and Amemiya, Kenta},
abstractNote = {A new soft x-ray beamline BL-2B at Photon Factory of High Energy Accelerator Research Organization (KEK-PF) covers energy range from vacuum ultraviolet (30 eV) to soft x-ray (4000 eV). This wide energy range could be achieved by employing two undulators and two monochromators. Two different energy range undulators were installed tandem to a 9-meter straight section of PF storage ring. The 1{sup st} undulator is for VUV (30 eV) to SX (280 eV), while the other one is for SX (280 eV) to HX (4000 eV). It is also necessary to be equipped with two different monochrometors for energy above and under 2000 eV; grating monochrometor and double crystal monochrometor. One of the main purposes of this bemaline is spectroscopic study of light elements contained in several functional materials. The beamline is designed for photoemission spectroscopy (PES), X-ray absorption fine structure (XAFS) and other types of experiments. The performance of the new beamline is reported and typical examples of its application to material science are demonstrated.},
doi = {10.1063/1.4952864},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • The current performance of a 10-m grazing incidence monochromator (GIM) is described. A resolution of 51, 95, and 220 meV (FWHM) has been achieved at 287, 401, and 867 eV, respectively, inferred from the linewidths for the {ital K}-shell resonances of gaseous CO, N{sub 2}, and Ne. A photon flux of {congruent}10{sup 12} photons/s is obtainable at the first harmonic of undulator radiation with a 1200-l /mm grating and 50-{mu}m slit openings, which correspond to {Delta}{lambda}=0.04 A.
  • At the Photon Factory a project of a transmission soft x-ray microscope using zone plates as imaging elements has been initiated since 1986 at the beam line BL2B which is for the linearly polarized undulator radiation. The prototype version was built and its performance was measured in 1987. In order to proceed with our project we have reconstructed it capable of the spatial resolution better than 100 nm. Further, we have just started a new plan of microscopy at the station BL28 which introduces the circularly polarized soft x-ray/vacuum ultraviolet light emitted from a helical undulator. Both the present statusmore » at BL2B and a future plan at BL28 are described.« less
  • Progress in performance of a beamline for a 60-period soft x-ray undulator of the 2.5-GeV Photon Factory storage ring was made by implementation of low emittance operation of the storage ring and improvements of beamline and monochromator units. Monochromated photon flux of up to 10/sup 12/ photons/s has now been achieved at maximum in ordinary operating conditions of the ring current of /approx/200 mA with resolution of 500--1000 over the soft x-ray region from 410 eV to a few keV of photon energy.
  • Since the first operation of the Photon Factory ring in the beginning of 1982, we have constructed seven insertion devices of various types: a superconducting wavelength shifter; two undulators, including a multiundulator; two multipole wigglers; and two multipole wigglers for circularly polarized synchrotron radiation sources. The performances of those devices are summarized, and the possibilities of the use of the TRISTAN main ring as an advanced synchrotron radiation source are presented.
  • The Photon Factory Advanced Ring (PF-AR) is a 6.5-GeV synchrotron light source at the High Energy Accelerator Research Organization (KEK). It can provide high-flux hard X-rays for such research as the materials science, structural biology and medical applications. The PF-AR has five insertion devices including four in-vacuum undulators. It is operated with a single bunch which fits for time-resolved experiments. A special 5-GeV operation is partly provided for a clinical application. An initial beam current and a beam lifetime are 60 mA and approximately 14 hours, respectively. Recent developments include an installation of a new in-vacuum undulator (U no. NW14-36)more » to the west rf section, which was accompanied by transferring two rf cavities to other section. The undulator has been successfully operated at a minimum magnetic gap of 10 mm. We also carried out such accelerator studies as a successful test of beam injection using a pulsed quadrupole magnet, a study of low emittance optics, an establishment of two-bunch operation for the clinical application, a successful operation of a multi-bunch feedback system, and an installation of a test undulator which enables us to control polarization using a new arrangement of magnets.« less