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BL41XU Protein crystal diffractometer

Inquiry number

INS-0000000343

Protein crystal diffractometer

  The diffractometer consists of three parts: Vacuum chamber, sample mounting part and detector. In the vacuum chamber, there are two sets of four-way guard slits, two units of rotary attenuator, two beam intensity monitors, and the beam shutter. The size and intensity of X-ray can be changed by using these components.
  The sample mounting part consists of an air-bearing goniometer, an on-axis microscope, a collimator and a cryo-cooler. The air-bearing goniometer has an advantage of very small eccentricity of 0.7 mm, which enables data collection using very small crystal. The on-axis microscope enables sample positioning of very small crystals by observing sample from the direction of the incident beam. The cryo-cooler can use both nitrogen and helium gas as a cooling gas. The minimum temperature of nitrogen and helium cooling is 90 K and 20 K, respectively.
 On this diffractometer, hybrid pixel detector (DECTRIS PILATUS3 6M) can be equipped. Since sample changer SPACE developed at SPring-8 is also equipped on the diffractometer, it is possible to conduct efficient sample screening.

Protein crystal diffractometer
  • Specifications of diffractometer
    • Usable beam size : 12 x 4mm2 〜 35 x 22mm2
    • Usable attenuator : aluminum foil of 10 ∼ 7000 mm thickness
    • Rotation angle of spindle axis: no restriction
    • Rotation speed of spindle axis : 180 ° / sec.
    • Sample translation for centering (X): ± 4.0 mm, (Y): ± 15.0 mm, (Z): ± 4.0mm
    • Temperature range of cryo-cooler : 300 〜 90 K (nitrogen gas) 〜 20 K (helium gas)

  • Specifications of the hybrid pixel detector (DECTRIS PILATUS3 6M)
    • Detector area : 423.6 × 434.6 mm2
    • CCD size : 2463 × 2527 pixels
    • Pixel size : 172 × 172 mm2
    • ADC : 20 bit
    • Read-out time : 0.95 msec/image
    • Camera length: 120 ∼ 800 mm

  • Sample changer SPACE
    • Peltiert-cooled silicon drift detector AmpTek Super SDD XR-100SDD
    • Multi-channel analyzer SEIKO EG&G MCA7700
    • Microscope
    • Incubator (4, 20°C)
    • Liquid nitrogen Dewar vessel
Last modified 2015-09-24 13:16
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