Perfect Crystal Diffractometer for Ultra Small-Angle Neutron Scattering

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A perfect crystal diffractometer (PCD) for ultra-high resolution small-angle neutron scattering (USANS) measurements is now in operation at the thermal neutron beam port, BT-5. The PCD increases the maximum size of features accessible with the NCNR's 30-m long, pinhole collimation SANS instruments by nearly two orders of magnitude, from ~10² nm to 10⁴ nm.

USANS Contacts:

• BT-4 Powder Diffractometer Telephone, (301) 975-6463 (no phone at BT-5)
• Instrument Responsible: Andrew Jackson, (301) 975-3146; ajj@nist.gov
• Instrument Scientist: John Barker, (301) 975-6732; john.barker@nist.gov
• Scheduling: David Mildner, (301) 975-6366; mildner@nist.gov

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Last modified 06-June-2007