Construction of a multipole wiggler, MPW♯13, at the Photon Factory

Abstract

An insertion device, MPW♯13, which can be operated in both wiggler and undulator modes, is presently under construction at the Photon Factory (PF). When installed in the PF storage ring, this device will produce wiggler radiation in the hard x-ray region, and also undulator radiation in the vacuum-ultraviolet (VUV) and soft x-ray regions. The wiggler structure employs 27 magnetic poles with a period length of 18 cm. The maximum peak field of the device of 1.5 T is attained via the hybrid configuration of its magnetic poles. Calculations of the spectral brilliance of the device exhibits the following features: in the wiggler mode, the brilliance at 10 keV will exceed that of the PF bending magnet radiation by a factor of 30; and in the undulator mode it will be between 10 and 100 times higher, from 10 eV to 1 keV, utilizing up to the fifth harmonic.

XANES study of rare-earth valency inLRu4P12(Lee1, Ōyanagi2, Sekine3 et al. 1999Phys. Rev. B695320View full textAdd to dashboardCite

“…Resistivity measurements reveal MI transition at T MI ϭ60 K for PrRu 4 XANES measurements were performed in a fluorescence mode at BL13B station of Photon Factory on the Pr L 2 -edge and at BL10XU of SPring-8 on the Ce L 3 edge. At the Photon Factory, we have used a 27-pole wiggler magnet 12 and a Si ͑111͒ double crystal monochromator, which is directly water-cooled. 13 In order to avoid the degradation of energy resolution due to distortion of Si monochromator as a result of heat load, incident x-ray intensity was suppressed to 2/3 of the full power by limiting the magnetic field of the 27-pole wiggler magnet to B 0 ϭ1.0 T where B 0 ϭ1.5 T provided the maximum beam intensity.…”

In situremoval of carbon contamination from optics in a vacuum ultraviolet and soft X-ray undulator beamline using oxygen activated by zeroth-order synchrotron radiation

“…The grazing angle is 2 for M1, M3 and M3 0 , and the including angles are 174.9 and 171.3 for the 300 and 1000 lines mm À1 VLSGs at 290 eV. A planar undulator is used as the source point (Sasaki et al, 1989). The undulator gap is fixed at 154 mm during cleaning and photon intensity measurements, unless otherwise stated.…”

In situremoval of carbon contamination from a chromium-coated mirror: ideal optics to suppress higher-order harmonics in the carbonK-edge region

“…The grazing angle of M1, M3 and M3 0 is 2 , and the including angles of the 300 and 1000 lines mm À1 VLSGs are 174.9 and 171.3 , respectively, at 290 eV. A planar undulator is used as the source point (Sasaki et al, 1989) and, unless otherwise stated, the undulator gap is fixed at 154 mm during carbon removal and photon intensity measurements. The first, third and fifth undulator peaks appear at 113, 339 and 564 eV for this gap.…”