Beamline 08ID-1


Contents

Beamline 08ID-1 is ideal for:

  • crystals that are very small or weakly diffracting
  • crystals having very large unit cells
  • routine data collection
  • remote data collection

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Beamline Overview

The scientific goal of the 08ID-1 beamline is to operate a protein crystallography beamline suitable for studying small crystals and crystals with large unit cells. The overall design of the beamline consists of white beam slits (WBS), a double crystal monochromator (DCM) with an indirectly cryo-cooled first crystal and sagittally focusing second crystal, and vertical focusing mirror (VFM). The beamline is completed with an innovative endstation and a Pilatus3 S 6M X-ray detector. The beamline controls are based on EPICS and are complemented with MxDC, a user-friendly interface developed in-house.

The source of X-rays on 08ID-1 is a small-gap undulator inserted into the storage ring (and is hence termed an "insertion device"). As its name suggests, the undulator produces a periodic magnetic field that causes the path of the orbiting electrons to undulate, resulting in an emitted X-ray beam of higher spectral brilliance than could be produced by the simpler path taken by the electrons through a bending magnet.

The beamline is equipped with a Röntec XFlash 1001 to perform X-ray spectroscopy measurements for SAD/MAD experiments as well as X-ray fluorescence (XRF) measurements for metal identification. An ISARA automounter allows remote experiments as well as onsite work.

Hardware Details

Source
Source 20 mm asymmetric hybrid small-gap in-vacuum undulator (SGU)
Current 250 mA
Average Beam Lifetime 12 h
Details
  • Minimum Gap: 5 mm
  • Maximum Gap: 35 mm
  • Number of Full Size Poles: 157
  • Total Number of Poles: 159
  • Total Length of Magnet Assemblies: 1607 mm
  • Permanent Magnet Blocks: Sm2Co17
  • Minimum Remanence: 1.03 T
  • Minimum Intrinsic Coercivity at 20°C: 20 kOe
  • Temperature Coefficient, Intrinsic Coercivity: -0.19 %/°C
  • Poles: Vanadium Permendur
  • Saturation Flux Density: 2.4 T
  • Total Power: 4.0 kW
Properties at Minimum Gap
  • Peak Flux Density: 1.066 T
  • Effective Flux Density: 0.981 T
  • Effective k: 1.83
  • Higher Order Contributions: 8.4%
  • Photon Energy, n = 1: 1.49 keV
  • Maximum Magnetic Load: 9.5 kN
Beam
Minimum Energy 6.0 keV (2.1 Å)
Maximum Energy 18 keV (0.69 Å)
Energy Bandwidth (ΔE/E) 1.5 x 10-4
Flux on Sample @ 12 keV (250 mA)
  • 5E12 ph/s
  • 2E12 (100 micron)
  • 1E12 (50 micron, current beam size)
  • 7E11 (20 micron)
Focal Size (FWHM) @ 12 keV (H x V) 130 µm x 30 µm
Flux Density @ 12 keV > 1E14 ph/s/mm²
Beam Divergence at Sample (H x V) @ 12 keV 0.9 mrad x 0.2 mrad
Optics
Mirrors
  • Vertical Focusing Mirror: ultra-low expansion (ULE) titanium siliicate flat mirror with Pt, Uncoated, and Pd strips
Horizontal Demagnification (1/Mx) 6.8
Vertical Demagnification (1/My) 12.0
Crystal Type Si(111)
Monochromator ACCEL/BRUKER double crystal monochromator (DCM), featuring indirectly cryo-cooled first crystal and sagittally focusing second crystal
Endstation
Additional Instrumentation Rontec Xflash 1001 fluorescence detector, HC1 humidity control device
Pin Length 18 mm Hampton Cryopin
Cryo Capability Oxford Instruments Cryojet
Automounter ISARA (single gripper) supporting Uni-Pucks
Goniometer
Goniometer Model Huber model EZ0675 XY
Maximum Rotation Speed (Deg/s) 180
Sphere of Confusion (microns) 1
Visualization System
Type On-Axis Visualization (OAV)
Orientation Along beam axis
Maximum zoom 5x
Maximum Field of View 2.9 x 2.2 mm
Minimum Field of View 0.6 x 0.4 mm
Detector
Crystal-Detector Distance 150-900 mm
Current Detector Model Pilatus3 S 6M
Type photon counting
X-ray Sensitive Surface 423.6 x 434.6 mm (184,097 mm²)
Head Dimensions (H x W x D) 59.0 x 60.3 x 45.5 cm
2Θ Range 20° - not currently in use
Resolution 2463 x 2527
Detector History
  • May 2017 - present: Pilatus3 S 6M detector, currently in use
  • April 2010 - February 2017: Rayonix MX300 CCD detector
  • Before April 2010: Rayonix MX225 CCD detector
Miscellaneous
Techniques
  • Single crystal X-ray diffraction
  • MAD/SAD experiments
  • XANES & EXAFS on crystals

Layout

Component Distance from Source
WBS (White Beam Slits) 41.3 m (Horizontal Slits) 41.5 m (Vertical Slits)
DCM (Double Crystal Monochromator) 43.5 m
VFM (Vertically Focusing Mirror) 46.0 m
Sample 49.9 m