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How neutron spins behave

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.