TY  - CONF
AU  - Voigt, Jörg
AU  - Violini, Nicolo
AU  - Schweika, Werner
TI  - Compact chopper spectrometers for pulsed sources
JO  - Journal of physics / Conference Series
VL  - 746
SN  - 1742-6588
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2017-01507
T2  - Journal of physics / Conference Series
SP  - 012018
PY  - 2016
AB  - 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.
T2  - VI European Conference on Neutron Scattering
CY  - 30 Aug 2015 - 4 Sep 2015, Zaragossa (Spain)
Y2  - 30 Aug 2015 - 4 Sep 2015
M2  - Zaragossa, Spain
LB  - PUB:(DE-HGF)16 ; PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
UR  - <Go to ISI:>//WOS:000409470900018
DO  - DOI:10.1088/1742-6596/746/1/012018
UR  - https://juser.fz-juelich.de/record/827371
ER  -