Time of flight modulation of intensity by zero effort on Larmor
N. Geerits (Student TU Delft)
S. R. Parnell (TU Delft - RST/Neutron and Positron Methods in Materials, TU Delft - RST/Fundamental Aspects of Materials and Energy)
M. Thijs (TU Delft - RID/TS/Technici Pool, TU Delft - RST/Neutron and Positron Methods in Materials)
A. A. van Well (TU Delft - RST/Neutron and Positron Methods in Materials, TU Delft - RID/Algemeen/Bedrijfsondersteuning)
C. Franz (Technische Universität München)
A.L. Washington (ISIS Neutron and Muon Source)
D. Raspino (ISIS Neutron and Muon Source)
R. M. Dalgliesh (ISIS Neutron and Muon Source)
J Plomp (TU Delft - RST/Neutron and Positron Methods in Materials, TU Delft - RID/TS/Instrumenten groep)
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Abstract
A time-of-flight modulation of intensity by zero effort spectrometer mode has been developed for the Larmor instrument at the ISIS pulsed neutron source. The instrument utilizes resonant spin flippers that employ electromagnets with pole shoes, allowing the flippers to operate at frequencies up to 3 MHz. Tests were conducted at modulation frequencies of 103 kHz, 413 kHz, 826 kHz, and 1.03 MHz, resulting in a Fourier time range of ∼0.1 ns to 30 ns using a wavelength band of 4 Å-11 Å.
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