BL-6A Focusing X-ray Beamline for Macromolecular Crystallography
BL-6A is designed for X-ray macromolecular crystallography. A water-cooled mask at 10.5 m from the source point provides a 1.3-mrad white beam. A focusing mirror is installed at the beamline in order to obtain a high-brilliant beam while eliminating higher energy X-rays in the beam. The mirror chamber located at 11.8 m is maintained in a high vacuum so as to keep the mirror surface clean. The ULE plane mirror has a 1.1-m-long reflecting surface. A synchrotron radiation beam is focused by the mirror at a glancing angle of 4.0 mrad (a critical wavelength of 0.82 Å). The hutch placed at 15 m from the source is sufficiently large for installing a single crystal monochromator and various types of cameras. An optical bench equipped with a cylindrically curved monochromator for a horizontal focusing is installed inside the monochromator chamber. A triangular silicon (111) crystal with an asymmetric angles of 7.8 degrees is prepared as a monochromator crystal for an optimum focusing of the beam at the 12.4 keV. The optical bench is provided with a slit system and a horizontal 2 θ table used for mounting and aligning a CCD detector with a goniostat.
SCHEMATIC VIEW OF THE BEAMLINE
Area of Research
Macromolecular crystallography
Light Source
Bending Magnet
Optics
Mirror: 11.8 m
1.1 m long bent plane mirror of ULE
Mono-chromator: 14.5 m
Triangular Si(111) with an asymmetric angle of 7.8 °
Photons at Sample Position
Energy range : 0.90 - 1.32 Å
Energy resolution : 1 x 10-3
Photon flux : 1.0 x 1010@2.5 GeV, 300 mA, 1.0 Å
(0.1x0.1 slit)
Facilities in the Experimental Station
Detector : ADSC Quantum 4R
Detector size : 188 x 188 mm
Camera distance : 40 - 400 mm
Vertical offset: 0 - 100 mm
Cryocooling device : RIGAKU Cryosystems
Fluorescence detector : SSD
Workstation and Softwares
Computers
4 PC Workstations (Linux, CentOS5)
2 PC Windows (USB2.0, IEEE1394)
Softwares for image processing
HKL2000, DPS/Mosflm/Scala
Reference
Y. Satow, A. Mikuni, N. Kamiya and M. Ando, Rev. Sci. Instrum. , 60, 2394 E397 (1989).
Contact Person
Noriyuki IGARASHI (KEK-PF)
Phone : +81-298-64-5641
Fax : +81-298-64-2801
e-mail : noriyuki.igarashi@kek.jp
Other Information
Current photograph of BL-6A
Comparison with other PX beamlines in PF
User Manual for PX beamlines
PX beamlines at PF Japanese/ English
Beamtime schedules, beamline news, and so on
Structural Biology Research Center
Last modified: 2009-4-8