  The instrumental concept of HERITAGE - a reflectometer with a horizontal
sample geometry - fitted to the long pulse structure of a neutron source is
presented. It is dedicated on creating a new class of reflectometers achieving
the unprecedentedly high flux for classical specular reflectometry combined
with off-specular reflectometry and grazing incidence small-angle scattering
(GISANS), thus resulting in a complete 3-d exploration for lateral structures
in thin films. This is achieved by specially designed neutron guides: in the
horizontal direction (perpendicular to the scattering plane) it has an elliptic
shape and focusses neutrons onto the sample. In the vertical direction it has a
multichannel geometry providing a smooth divergence distribution at the sample
while accepting the whole beam from a compact high-brilliance flat moderator.
The modular collimation setup of HERITAGE provides an extremely high
flexibility in respect to sample geometries and environments, including the
possibility to study all types of solid and liquid interfaces statically or
kinetically. Moreover, the use of multiple beam illumination allows for
reflectivity and GISANS measurements at liquid interfaces both from above and
below without any movement of the sample. This concept assures that
reflectivity and GISANS measurements can be performed in its best way as the
maximum possible and usable flux is delivered to the sample, outperforming all
present-day or already planned for the ESS reflectometers and GISANS setups in
flux and in measuring time for standard samples.

Instrumentation and Detectors