Novel multiplexing techniques, such as Repetition Rate Multiplication and Wavelength
Frame Multiplication imply the use of a set of monochromatic wavelengths or a set
of wavelength bands coming from the same source pulse by using novel combinations
of standard mechanical neutron choppers. In this case the instrumental parameters,
such as wavelength resolution, wavelength band, repetition rate are not any more determined
by the source parameters, but can be flexibly defined by the chopper frequencies,
speeds and slits. Here we report about the first experimental implementation of Repetition
Rate Multiplication (RRM) and Wavelength Frame Multiplication (WFM). For this purpose
the TOF spectrometer NEAT at HZB, Berlin and TOF diffractometer at BNC, Budapest have
been used in non-standard modes of operation. Our results provide full proof-of-principle
of the RRM and WFM methods and clearly show the extensive capability of these methods
to achieve multiply enhanced data collection rates by individually tuning for each
experiment the pulse length and/or pulse repetition rate within broad limits and independently
from the actual source pulse parameters.
