  Modulation of Intensity Emerging from Zero Effort (MIEZE) is a neutron
resonant spin echo technique which allows one to measure time correlation
scattering functions in materials by implementing radio-frequency (RF)
intensity modulation at the sample and detector. The technique avoids neutron
spin manipulation between the sample and the detector, and thus could find
applications in cases where the sample depolarizes the neutron beam. However,
the finite sample size creates a variance in path length between the locations
where scattering and detection happens, which limits the contrast in intensity
modulation that one can detect, in particular towards long correlation times or
large scattering angles. We propose a modification to the MIEZE setup that will
enable one to extend those detection limits to longer times and larger angles.
We use Monte Carlo simulations of a neutron scattering beam line to show that,
by tilting the RF flippers in the primary spectrometer with respect to the beam
direction, one can shape the wave front of the intensity modulation at the
sample to compensate for the path variance from the sample and the detector.
The simulation results indicate that this change enables one to operate a MIEZE
instrument at much increased RF frequencies, thus improving the effective
energy resolution of the technique. The simulations show that for an incident
beam with maximum divergence of 0.33$^\circ$, the maximum Fourier time can be
increased by a factor of 3.
