13C1 SW60 - Protein Crystallography

Abstract

The PX-C beamline is one of the two high-performance asymmetric-cut curved crystal monochromator (ACCM) side-branch X-ray beamlines designed to fully utilize the sideway output of a superconducting multipole wiggler (SMPW) source for protein crystallography research. The PX-C beamline collects 1 mrad of radiation in the horizontal direction, with centerline located at 4 mrad from the centerline of the 13 mrad radiation fan of the wiggler output. This beamline will deliver photon flux, through a 100 μm pinhole, of 8 × 1010 photons/sec with energies from 12 keV to 14 keV and resolution (ΔE/E) of 1.5 × 10-3 for standard monochromatic crystallography experiments. A Rh-coated, water-cooled vertical focusing mirror is placed upstream of the ACCM to simplify the energy tuning mechanism and to reduce the heat load of the crystal by cutting off the photon beams at energies above 15 keV. The ACCM incorporates a special cost-effective design that comprises a crystal plate affixed to a water-cooled, bendable Cu substrate, where heat conducts through a paste-like alloy. With this design, the monochromator will provide high photon flux and resolution while maintaining excellent stability. This beamline will be ready for commission in 2005.

Areas of Research

Protein crystallography

Light Source

TypeSuperconducting Multipole Wiggler
Source SizeHorizontal αh = 0.01 mm
Vertical αv =  0.86 mm
Number of Poles28 (effective), 32 (total)
Period Length6 cm
Magnetic Field3.2 T
Energy Range6.5~19 keV

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 Contacts

Endstation

+886-3-578-0281 Ext. 1133

BL Spokesperson

Jean, Yuch-Cheng (簡玉成)
ycjean@nsrrc.org.tw
+886-3-578-0281 Ext. 7321

BL Manager/Local Contact

Chiang, Cheng-Hung (姜政宏)
jjh@nsrrc.org.tw
+886-3-578-0281 Ext. 7369


Techniques

  • X-ray Photoelectron Spectroscopies (XPS)

Disciplines

  • Biochemistry

General Information

  • Source: 13C1
  • Energy Range: 12~14 kev
  • Focused Spot Size: 400 × 100 μm
  • Status: Operational







National Synchrotron Radiation Research Center

101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, Taiwan 30076

+886-3-578-0281