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The scanning four-bounce monochromator for beamline I20 at the Diamond Light Source
DOI:
10.1107/S1600577518008974
Authors:
Shusaku
Hayama
(Diamond Light Source)
,
Graham
Duller
(Diamond Light Source)
,
John
Sutter
(Diamond Light Source)
,
Monica
Amboage
(Diamond Light Source)
,
Roberto
Boada
(Diamond Light Source)
,
Adam
Freeman
(Diamond Light Source)
,
Luke
Keenan
(Diamond Light Source)
,
Brian
Nutter
(Diamond Light Source)
,
Leo
Cahill
(Diamond Light Source)
,
Pete
Leicester
(Diamond Light Source)
,
Ben
Kemp
(Diamond Light Source)
,
Nicholas
Rubies
(Diamond Light Source)
,
Sofia
Diaz-Moreno
(Diamond Light Source)
Co-authored by industrial partner:
No
Type:
Journal Paper
Journal:
Journal Of Synchrotron Radiation
, VOL 25
State:
Published (Approved)
Published:
September 2018
Open Access
Abstract: A description of the technical and design details of a scanning four-bounce crystal monochromator that has recently been commissioned for the Versatile X-ray Absorption Spectroscopy (XAS) beamline at Diamond Light Source is presented. This device consists of two independent rotary axes of unique design which are synchronized using a multiple read-head encoder system. This monochromator is shown to be capable of maintaining the flux throughput of the Bragg axes without the need of any external feedback mechanism from 4 to 20 keV. The monochromator is currently equipped with cryogenically cooled crystals with the upstream axis consisting of two independent Si(111) crystals and a pair of channel-cut crystals in the downstream axis. The possibility of installing an additional Si(311) crystal-set to extend the energy range to 34 keV is incorporated into the preliminary design of the device. Experimental data are presented showing the exceptional mechanical stability and repeatability of the monochromator axes.
Journal Keywords: X-ray absorption spectroscopy; beamline; monochromator; optics
Subject Areas:
Physics
Instruments:
I20-Scanning-X-ray spectroscopy (XAS/XES)
Added On:
08/08/2018 08:39
Documents:
ig5061.pdf