Optical design of the SNS liquids reflectometer

J. F. Ankner, Ch Rehm, E. D. Blakeman, R. L. Kellogg

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Barring a monumental failure of design execution or of performance estimation, the liquids reflectometer at the SNS will provide unprecedented capabilities for the study of liquid and solid surfaces. Design of the instrument is well underway and procurement of the guide components has begun. Neutrons from a coupled 20-K supercritical hydrogen moderator will be delivered via a multi-channel supermirror bender and tapered guide onto either a horizontal or tilted surface. Collimating slits select the beam incident angle from a 0-5° vertical intensity distribution provided by the optics. With the SNS running at 2 MW, the instrument will be able to accumulate a complete specular reflectivity scan from D2O (R < 10-7, Q > 0.5 Å-1) in less than 10 minutes. We will describe the optical design of the SNS liquids reflectometer, compare it with a conventional instrument, and estimate its time resolution for a model kinetic system.

Original languageEnglish
Pages (from-to)53-63
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4785
DOIs
StatePublished - 2002
Externally publishedYes
EventAdvances in Neutron Scattering Instrumentation - Seattle, WA, United States
Duration: Jul 7 2002Jul 8 2002

Keywords

  • Neutron optics
  • Neutron reflectivity
  • Pulsed neutron sources
  • Reflectometer

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