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Developments in optics and performance at BL13-XALOC, the macromolecular crystallography beamline at the Alba Synchrotron

Juanhuix, Jordi; Gil-Ortiz, Fernando; Cuni, Guifre; Colldelram, Carles; Nicolas, Josep; Lidon-Simon, Julio LU ; Boter, Eva; Ruget, Claude; Ferrer, Salvador and Benach, Jordi (2014) In Journal of Synchrotron Radiation 21. p.679-689
Abstract
BL13-XALOC is currently the only macromolecular crystallography beamline at the 3 GeV ALBA synchrotron near Barcelona, Spain. The optics design is based on an in-vacuum undulator, a Si(111) channel-cut crystal monochromator and a pair of KB mirrors. It allows three main operation modes: a focused configuration, where both mirrors can focus the beam at the sample position to 52 mu m x 5.5 mu m FWHM(H x V); a defocused configuration that can match the size of the beam to the dimensions of the crystals or to focus the beam at the detector; and an unfocused configuration, where one or both mirrors are removed from the photon beam path. To achieve a uniform defocused beam, the slope errors of the mirrors were reduced down to 55 nrad RMS by... (More)
BL13-XALOC is currently the only macromolecular crystallography beamline at the 3 GeV ALBA synchrotron near Barcelona, Spain. The optics design is based on an in-vacuum undulator, a Si(111) channel-cut crystal monochromator and a pair of KB mirrors. It allows three main operation modes: a focused configuration, where both mirrors can focus the beam at the sample position to 52 mu m x 5.5 mu m FWHM(H x V); a defocused configuration that can match the size of the beam to the dimensions of the crystals or to focus the beam at the detector; and an unfocused configuration, where one or both mirrors are removed from the photon beam path. To achieve a uniform defocused beam, the slope errors of the mirrors were reduced down to 55 nrad RMS by employing a novel method that has been developed at the ALBA high-accuracy metrology laboratory. Thorough commissioning with X-ray beam and user operation has demonstrated an excellent energy and spatial stability of the beamline. The end-station includes a high-accuracy single-axis diffractometer, a removable mini-kappa stage, an automated sample-mounting robot and a photon-counting detector that allows shutterless operation. The positioning tables of the diffractometer and the detector are based on a novel and highly stable design. This equipment, together with the operation flexibility of the beamline, allows a large variety of types of crystals to be tackled, from medium-sized crystals with large unit-cell parameters to microcrystals. Several examples of data collections measured during beamline commissioning are described. The beamline started user operation on 18 July 2012. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
macromolecular crystallography, beamline, Alba, mirror slope errors
in
Journal of Synchrotron Radiation
volume
21
pages
679 - 689
publisher
Wiley-Blackwell
external identifiers
  • wos:000338124300005
  • scopus:84903614317
ISSN
1600-5775
DOI
10.1107/S160057751400825X
language
English
LU publication?
yes
id
75ba7463-9b17-4533-a146-0dbcb148dc86 (old id 4602798)
date added to LUP
2014-09-04 13:52:21
date last changed
2017-10-29 03:47:10
@article{75ba7463-9b17-4533-a146-0dbcb148dc86,
  abstract     = {BL13-XALOC is currently the only macromolecular crystallography beamline at the 3 GeV ALBA synchrotron near Barcelona, Spain. The optics design is based on an in-vacuum undulator, a Si(111) channel-cut crystal monochromator and a pair of KB mirrors. It allows three main operation modes: a focused configuration, where both mirrors can focus the beam at the sample position to 52 mu m x 5.5 mu m FWHM(H x V); a defocused configuration that can match the size of the beam to the dimensions of the crystals or to focus the beam at the detector; and an unfocused configuration, where one or both mirrors are removed from the photon beam path. To achieve a uniform defocused beam, the slope errors of the mirrors were reduced down to 55 nrad RMS by employing a novel method that has been developed at the ALBA high-accuracy metrology laboratory. Thorough commissioning with X-ray beam and user operation has demonstrated an excellent energy and spatial stability of the beamline. The end-station includes a high-accuracy single-axis diffractometer, a removable mini-kappa stage, an automated sample-mounting robot and a photon-counting detector that allows shutterless operation. The positioning tables of the diffractometer and the detector are based on a novel and highly stable design. This equipment, together with the operation flexibility of the beamline, allows a large variety of types of crystals to be tackled, from medium-sized crystals with large unit-cell parameters to microcrystals. Several examples of data collections measured during beamline commissioning are described. The beamline started user operation on 18 July 2012.},
  author       = {Juanhuix, Jordi and Gil-Ortiz, Fernando and Cuni, Guifre and Colldelram, Carles and Nicolas, Josep and Lidon-Simon, Julio and Boter, Eva and Ruget, Claude and Ferrer, Salvador and Benach, Jordi},
  issn         = {1600-5775},
  keyword      = {macromolecular crystallography,beamline,Alba,mirror slope errors},
  language     = {eng},
  pages        = {679--689},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Synchrotron Radiation},
  title        = {Developments in optics and performance at BL13-XALOC, the macromolecular crystallography beamline at the Alba Synchrotron},
  url          = {http://dx.doi.org/10.1107/S160057751400825X},
  volume       = {21},
  year         = {2014},
}