Diffuse Scattering Spectrometer
D7 has been dismantled. The new permanently-polarized diffuse scattering spectrometer D007 will deliver its first neutrons in 2024.
How neutron spins behave
Here D7 is shown in its spin-flip (SF) configuration.
- Unpolarised neutrons are reflected by the graphite monochromator.
- The incident neutron beam is polarised by the supermirror bender polariser.
- For measurement of SF cross-sections, the neutrons are spin flipped by the flipper.
Flipper is turned off when measuring non spin-flip (NSF) cross-sections.
- The neutrons are reflected and also partially spin-flipped by the sample.
- The spin-up neutrons are transmitted and spin-down neutrons are absorbed the supermirror bender analyser before being detected.