Journal Article/Contribution to a conference proceedings/Contribution to a book

FZJ-2017-01507

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Compact chopper spectrometers for pulsed sources

Voigt, J. (Corresponding author)FZJ* ; Violini, N.FZJ* ; Schweika, W.

2016
IOP Publ. Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/13761  doi:10.1088/1742-6596/746/1/012018

Abstract: We report on the opportunities for direct geometry chopper spectrometers (DGCS) by polychromatic illumination of the sample. At pulsed sources the use of multiple initial neutron energies appears naturally, if the repetition rate of chopper in front of the sample is larger than the repetition rate of the source. As a consequence, a large part of the spectrum is measured redundantly with variable energy and momentum transfer resolution. This can be used to optimize a chopper instrument for deep inelastic scattering, relaxing the requirements on the pulse length, by which the sample is illuminated, and on the secondary flight path, while the width of the spectral distribution must be narrowed down. This can open the path to new types of compact direct geometry chopper spectrometers, which need comparably small areas of detector coverage and allow very high repetition rates to provide a high intensity even if sample size and divergence distributions are limited.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS (München) ; Jülich Centre for Neutron Science JCNS (München) ; JCNS-FRM-II)
2. Streumethoden (JCNS-2)
3. Streumethoden (PGI-4)
4. JARA-FIT (JARA-FIT)
5. Neutronenstreuung (Neutronenstreuung ; JCNS-1)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
2. 144 - Controlling Collective States (POF3-144) (POF3-144)
3. 524 - Controlling Collective States (POF3-524) (POF3-524)
4. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
5. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2017

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Database coverage:
; ; ; DOAJ Seal ; Nationallizenz ; SCOPUS

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