Beamline 23-ID-B: Sector 23 - Insertion Device Beamline B

Description

Sector 23 utilizes canted undulators to provide two independent sources for the two ID-beamlines 23-ID-B (U33) and 23-ID-D (U30). The beamlines support macromolecular crystallography, MAD/SAD phasing, virus crystallography, and microcrystals. The beamlines are equipped with on-axis-microscopes allowing parallax free alignment. Our quad-mini-beam collimators (Fischetti, et.al. JSR 16, 217-225) provide either a 5, 10 or 20 micron beam or a scatter guard for the 120x25 micron^2 beam with intensities of 4.0e10, 1.4e11, 5.6e11 and 6.7e12 photons/sec, respectively. The sample goniometer has a ~1 micron (peak-to-peak) sphere-of-confusion. The mini-beam capability has been coupled with powerful user friendly software (JBluIce-EPICS) providing the ability to raster scan the diffractive or fluorescence properties of a sample to locate micro-crystals or map the properties of larger crystals. Users can also mitigate the effects of radiation damage by defining a 3-dimensional vector along which partial data sets can automatically be collected. An ALS-style sample automounter (BAM-1) provides high throughput sample screening. The automounter accommodates ALS-Hampton pins in ALS, Unipuck, or Rigagu pucks.

Supported Techniques

• Macromolecular crystallography
• Microbeam
• Large unit cell crystallography
• Subatomic (<0.85 Å) resolution
• Multi-wavelength anomalous dispersion
• Single-wavelength anomalous dispersion

Beamline Controls and Data Acquisition

The GM/CA-CAT JBluIce-EPICS user friendly interface retains the look of the original SSRL BluIce, but has been completely rewritten in JAVA at GM/CA to run on EPICS, VME EPICS/MEDM low level interface, PMAC Turbo motion control, and Linux workstations for data collection and processing (Stepanov, et.al. Acta. Cryst. D. 67, 176-188). The JBluIce-EPICS software is an open source available for downloading from GM/CA-CAT files depository.

Detectors

• MAR 300 CCD
• Ketek SDD for fluorescence spectroscopy

Additional Equipment

• Mini-beams: 5, 10, or 20 microns
• Sample automounter
• On-axis-visualizer
• 1-micron on specical request

Local Contacts

Beamline Specs

For additional information see:
http://www.gmca.anl.gov/