Open AccessTwin helical undulator beamline for soft X‐ray spectroscopy at SPring‐8
Author(s) -
Saitoh Y.,
Nakatani T.,
Matsushita T.,
Miyahara T.,
Fujisawa M.,
Soda K.,
Muro T.,
Ueda S.,
Harada H.,
Sekiyama A.,
Imada S.,
Daimon H.,
Suga S.
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s090904959701902x
Subject(s) - spring 8 , undulator , beamline , monochromator , physics , van de graaff generator , optics , synchrotron radiation , radiation , line (geometry) , spectroscopy , beam (structure) , geometry , mathematics , quantum mechanics , wavelength
A very high resolution soft X‐ray beamline, BL25SU, has been designed and is under construction at SPring‐8. Completely right or left circularly polarized light is supplied on a common axis of a newly designed twin helical undulator. A helicity modulation up to 10 Hz can be performed using five kicker magnets. The fundamental radiation covers the region 0.5–3 keV. Higher‐order radiation is rather weak on the axis. A monochromator with varied‐line‐spacing plane gratings is installed to cover the region below 1.5 keV. A very high resolution beyond 10 4 is expected for the whole energy region.