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Instrument Development Group

Lee Robertson

NFDD Division Meeting

January 15th, 2008

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We do R&D on new instrument concepts and components

Current topics of interest include:

• Polarization (3He polarization techniques, supermirror polarizers, magnetic spin filters)

• Instrument Concepts: SESAME, SERGIS, MIEZE, Imaging, TISANE, and “wavelength multiplication”

• Neutron Optics (focusing mirrors, refractive and magnetic lenses, new monochromator/analyzer materials, and high speed adaptive optics for pulse/probe applications)

• Neutron Transport (guides, magnetic beam confinement)

Lee Robertson Group LeaderHal Lee Research ScientistDennis Rich Research Scientist

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Polarization Lab

The primary goal of the group for 2008 is to produce a working prototype wide angle 3He polarizer and have a design suitable for use on the instruments by 2009.

45° Wide Angle Polarization Cell 3He Filling Station

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Test of 3He Polarization Cell – Jan 2008

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New Instrument Development Beamline

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SERGIS DevelopmentBuild Experiment

0 20 40 60 80-0.2

0.0

0.2

0.4

0.6

0.8

1.0

G(Z

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Z (nm)

8.3% 100 nm PS in D2O

10.7% 100 nm PS in D2O

2.8% 40 nm PS spheres in D2O

Results

Setup at Asterix

Design

HFIR Cold Guide Hall

Neutron O

ptics / I

maging

SERGIS / MIEZE Development

Neutron Imaging

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Instrument Development Fellowship Program

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This fellowship is for 1-3 years and is for the development of novel neutron instrumentation and instrument components. The call is directed at scientists within 10 years of their PhD from academic, industrial, or government institutions. The plan is to offer one or two Fellowships each year so that there will nominally be four Fellows here at any given time.

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Dr. Thorwald van VuureORNL Instrument Development Fellow

Novel Concepts for Neutron Instrumentation

Dr. Thorwald van Vuure is the first Instrument Development Fellow. He is working on a new detector concept which combines inclined layers of solid thermal-neutron converters with gas electron multipliers for thermal-neutron detection to achieve a higher data rate than is currently available.