Materials in extreme environments
High-Pressure-Preferred Orientation (HIPPO) on Flight Path 4 is the first third-generation neutron time-of-flight powder diffractometer constructed in the United States. It achieves very high neutron count rates by virtue of a short (9m) initial flight path on a high-intensity water moderator and 1200 3He detector tubes covering 4.8m2 of detector area from 40° to 150° in scattering angles.
HIPPO was designed and manufactured as a joint effort between LANSCE and the University of California with the goal of doing world-class science by making neutron powder diffractometry an accessible tool to the national user community.
D-spacing ranges from 0.12-4.80 Å (1.31-52.4 Å-1) to 1.2-47.5 Å (0.13-5.3 Å-1) are available to support studies of crystal orientation distribution (texture), amorphous solids, liquids, magnetic diffraction, small crystalline samples, and samples subjected to non-ambient environments such as temperature above (<1150C) and below (>~20K) ambient temperature or magnetic fields (<1.5T). The exceptionally high data rates of HIPPO also make it useful for time-resolved studies. HIPPO's sample chamber also accommodates user-provided sample environments.
