guest ::
| Home > Publications database > An indirect geometry crystal time-of-flight spectrometer for FRM II |
| Home > Publications database > An indirect geometry crystal time-of-flight spectrometer for FRM II |
| Journal Article | IMPULSE-2024-00196 |
; ; ;
2024
Inst. of Physics
London
Please use a persistent id in citations: doi:10.1088/1748-0221/19/11/P11001
Abstract: We present a concept for an indirect geometry crystal time-of-flight spectrometer, whichwe propose for a source similar to the FRM-II reactor in Garching. Recently, crystal analyzerspectrometers at modern spallation sources have been proposed and are under construction. Thesecondary spectrometers of these instruments are evolutions of the flat cone multi-analyzer for three-axis spectrometers (TAS).The instrument will provide exceptional reciprocal space coverage and intensity to map out the excitation landscape in novel materials. We will discuss the benefitsof combining a time-of-flight primary spectrometer with a large crystal analyzer spectrometer at acontinuous neutron source. The dynamical range can be very flexibly matched to the requirementsof the experiment without sacrificing the neutron intensity. At the same time, the chopper systemallows a quasi-continuous variation of the initial energy resolution. The neutron delivery systemof the proposed instrument is based on the novel nested mirror optics, which images neutrons fromthe position of the pulse cutting chopper representing a bright virtual source onto the sample. Thespot size of less than 1 cm×1 cm at the virtual source allows the realization of very short neutronpulses by the choppers, while the small and well-defined spot size at the sample position providesan excellent energy resolution of the secondary spectrometer.
Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
|
The record appears in these collections: |
PDF
PDF (PDFA)