Journal Article

FZJ-2015-03399

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Extension of the VITESS polarized neutron suite towards the use of imported magnetic field distributions

Manoshin, S. ; Rubtsov, A. ; Bodnarchuk, V. ; Mattauch, S.FZJ* ; Ioffe, A. (Corresponding Author)FZJ*

2014
IOP Publ. Bristol

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Please use a persistent id in citations: http://hdl.handle.net/2128/8766  doi:10.1088/1742-6596/528/1/012033

Abstract: Latest developments of the polarized neutron suite in the VITESS simulation package allowed for simulations of time-dependent spin handling devices (e.g. radio-frequency (RF) flippers, adiabatic gradient RF-flippers) and the instrumentation built upon them (NRSE, SESANS, MIEZE, etc.). However, till now the magnetic field distribution in such devices have been considered as "ideal" (sinusoidal, triangular or rectangular), when the main practical interest is in the use of arbitrary magnetic field distributions (either obtained by the field mapping or by FEM calculations) that may significantly influence the performance of real polarized neutron instruments and is the key issue in the practical use of the simulation packages. Here we describe modified VITESS modules opening the possibility to load the magnetic field 3-dimensional space map from an external source (file). Such a map can be either obtained by direct measurements or calculated by dedicated FEM programs (such as ANSYS, MagNet, Maxwell or similar). The successful use of these new modules is demonstrated by a very good agreement of neutron polarimetric experiments with performance of the spin turner with rotating magnetic field and an adiabatic gradient RF-flipper simulated by VITESS using calculated 3-dimensional field maps (using MagNet) and magnetic field mapping, respectively.

Keyword(s): Others (1st) ; Instrument and Method Development (1st) ; Others (1st) ; Instrument and Method Development (2nd) ; Others (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. Neutronenstreuung (Neutronenstreuung ; JCNS-1)
3. Streumethoden (JCNS-2)

Research Program(s):

1. 54G - JCNS (POF2-54G24) (POF2-54G24)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2015

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Database coverage:
; ; ; ; Nationallizenz ; SCOPUS

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