Beamline 18-ID-D: Sector 18 - Insertion Device Beamline

Life Sciences


The Biophysics Collaborative Access Team is an NIH-supported research center for the study of the structure and dynamics of partially ordered biological systems. Solution scattering experiments, which provide data about macromolecular conformation in solution, can be done in static or time-resolved modes with millisecond-scale time resolution. Fiber diffraction patterns of exceptional quality can be obtained from complex, weakly diffracting biological systems in very short exposure times. The beamline has independent horizontal and vertical focusing and houses two independent monochromators. Source demagnification of up to 11:1 vertically and 7:1 horizontally can be attained. Micro-diffraction is possible either with a K-B mirror system (~ 5 x 5 micron minimum beamsize) or a compound refractive lens 9~4 x 20 micron minimum beam size)


Supported Techniques

  • Fiber diffraction
  • Microdiffraction
  • Small-angle x-ray scattering
  • Time-resolved x-ray scattering


  • Mar 165 CCD detector
  • High sensitivity 2k x 7k CCD detector with 39 micron pixels (80 x 160mm active area)
  • Single element Si drift detector
  • Vortex 4-element Si drift detector
  • Pilatus 100k pixel array detector

Additional Equipment

  • K-B mirror microfocus system
  • Linkham cryostage
  • Small angle camera (up to 3.5 m camera length)
  • Flow-through SAXS cell
  • Stopped-flow/continuous-flow mixers for SAXS
  • Combined x-ray cell/muscle physiology apparatus

Local Contacts

Name THOMAS C. IRVING (Director, Fiber Diffraction)
Phone 630.252.0524
Name CLAREEN A. KROLIK (Administrator)
Phone 630.252.0549
Phone 630.252.0541
Phone 630.252.3062
Name OLGA ANTIPOVA (Fiber Diffraction)
Phone 630.252.7993
Name JOSEPH P. R. ORGEL (Fiber Diffraction)
Phone 630.252.

Beamline Specs


3.3 Undulator (Undulator A)

Monochromator Type


Energy Range

3.5-35 keV

Resolution (ΔE/E)

1 x 10 -4

Flux (photons/sec)

2 x 1013 @10 keV

Beam Size (HxV)


150µm x 50µm


2mm x 1mm

For additional information see:

Current Status:

Operational/Accepting General Users

Access Mode: