SBRC 構造生物学研究センター



BL-1A: Protein Micro-Crystallography and Low-Energy SAD Experiment Beamline

BL-1A is dedicated to microcrystallography and long wavelength SAD (Single Anomalous dispersion) experiments. The beamline is designed to take full advantage of a long wavelengh X-ray beam at around 3 A to further enhance anomalous signals. The light source is an in-vacuum short gap undulator optimized at around the wavelength with the fundamental harmonics to obtain maximum brilliance. The vacuum section of the beamline has only one terminal beryllium window, followed by a diffractometer equipped with a helium cryostream and a specially designed helium chamber to minimize the attenuation of the lower energy beam and background noises. A cryo-cooled channel-cut monochromator and bimorph KB focusing mirrors compose a simple optics to deliver a focused beam with a good stability.

Area of Research

Macromolecular crystallography

Light Source
Short Gap Undulator
  • Periodic length : 12 mm
  • Periodic Number : 39
  • Maximum K value : 0.78
Mono-chromator 16.5 m Cryo-cooled channel-cut Si(111)
Vertical Focusing Mirror 18.6 m 16 electrodes bimporh (600 mm (L) x 45 mm (W)), Rh/SiO2 coated with 4.0 mrad glancing angle.
Horizontal Focusing Mirror 19.2 m 12 electroldes bimporh (450 mm (L) x 45 mm (W)), two stripes (Rh/SiO2) with 4.0 mrad glancing angle.
Photons at Sample Position
Energy range : 0.95 - 1.1 &Aring, 2.7 - 3.3 Å
Energy resolution : 2 x 10-4
Photon flux : 4 x 1011, 450 mA, 1.1 Å
2 x 1011, 450 mA, 3.3 Å
(beam size: 0.03x0.01 mm)
Facilities in the Experimental Station
Detector: Dectris PILATUS 2M-F
Detector size : 253 x 289 mm
Camera distance : 50 - 460 mm
Vertical offset : 0 - 150 mm
Cryocooling device : CryoIndusty Co. G2B-LT
(nitrogen gas flow around 95 K, helium gas flow 30 - 95 K)
Fluorescence detector : SSD
Workstation and Softwares
5 Linux (CentOS6)
2 Windows ( USB2.0 )
HKL2000, DPS/Mosflm/Scala, XDS
Contact Person

Naohiro Matsugaki (KEK-PF)
Phone : +81-298-64-5647
Fax : +81-298-64-2801
e-mail :

Last modified: 2012-09-03