USJ-TAX - US-Japan Triple Axis Spectrometer
Triple Axis Spectrometer
A triple axis spectrometer (TAX) is a Nobel Prize winning class of
instruments at reactor-based neutron scattering facilities, developed by B.
N. Brockhouse in the 1950’s. The neutron momentum matches to crystal lattice
dimensions, and the neutron kinetic energy matches to excitations (phonons,
magnons, etc.), enabling simultaneous study of structure and dynamics. At
the 3 axes are (1) the monochromator crystal whose angle selects incident
energy via Bragg’s law, (2) the sample, which scatters and possibly
exchanges energy with the neutrons, and (3) the analyzer crystal which
selects final energy.
Last Modified: Tuesday, 04-Mar-2008 14:52:52 EST