V16
Very Small Angle Neutron Scattering (VSANS)
Instrument description
The second SANS instrument at BER II is dedicated to soft matter research. V16 covers a Q-range from 10-3 nm-1 to 8.5 nm-1. In standard time-of-flight mode an offset of the detector to the instrument axis to extend the Q range will be possible.
The instrument works in the time-of-flight mode with ordinary pinhole collimation and in an optional high resolution mode using multi pinhole grid collimation. The latter mode will allow for gravitational velocity selection and focuses many beams on a high resolution detector, only used for this option.
Applications
Unpolarized small-angle neutron scattering
Selected examples
Instrument layout
Time-of-flight standard pin-hole with optional VSANS optics and detector
Instrument Data | |
---|---|
Neutron guide | NL 4C straight behind bender, SM coated, m=1 cross section 80x80 mm2 with cut-off λ=0.25 nm |
Collimation | exchangeable pinhole and guide optics on up to 12m length |
Monochromator | TOF |
Wave length | 0.25 nm < λ < 1.8 nm |
Wave length resolution | |
Flux | |
Q range | 0.02 nm -1 < Q < 8.0 nm -1 |
Q resolution | 5% < ΔQ/Q < 18%, depending on the chopper settings |
Detector | 2D 3He detector • 100x100 cm2 area • physical pitch: 9 mm |
Sample-to-detector distance | 1.7m up to 11.2m |
Polarized neutrons | no, but principally possible |
Instrument options | • Low-Q mode (not offered to users) |
Sample environment | Hellma cuvettes (120, 404), rheometer, DEGAS cell and balance, battery cell, cryostats and magnets from sample environment group. |
Software | Caress (control), Evalstat (in-house DAQ), Mantid (data reduction) |