TY - JOUR
T1 - Large scaleslong times
T2 - Adding high energy resolution to SANS
AU - Brandl, G.
AU - Georgii, R.
AU - Häußler, W.
AU - Mühlbauer, S.
AU - Böni, P.
N1 - Funding Information:
We acknowledge very helpful discussions with J. Neuhaus, T. Keller, K. Habicht, C. Pfleiderer, M. Bleuel and J. Lal. This work is supported by the BMBF under “Mitwirkung der Zentren der Helmholtz Gemeinschaft und der Technischen Universität München an der Design-Update Phase der ESS, Förderkennzeichen 05E10WO1”.
PY - 2011/10/21
Y1 - 2011/10/21
N2 - The Neutron Spin Echo (NSE) variant MIEZE (Modulation of IntEnsity by Zero Effort), where all beam manipulations are performed before the sample position, offers the possibility to perform low background SANS measurements in strong magnetic fields and depolarising samples. However, MIEZE is sensitive to differences ΔL in the length of neutron flight paths through the instrument and the sample. In this article, we discuss the major influence of ΔL on contrast reduction of MIEZE measurements and its minimisation. Finally we present a design case for enhancing a small-angle neutron scattering (SANS) instrument at the planned European Spallation Source (ESS) in Lund, Sweden, using a combination of MIEZE and other TOF options, such as TISANE offering time windows from ns to minutes. The proposed instrument would allow obtaining an excellent energy- and Q-resolution straightforward to μs for 0.01 -1, even in magnetic fields, depolarising samples as they occur in soft matter and magnetism while keeping the instrumental effort and costs low.
AB - The Neutron Spin Echo (NSE) variant MIEZE (Modulation of IntEnsity by Zero Effort), where all beam manipulations are performed before the sample position, offers the possibility to perform low background SANS measurements in strong magnetic fields and depolarising samples. However, MIEZE is sensitive to differences ΔL in the length of neutron flight paths through the instrument and the sample. In this article, we discuss the major influence of ΔL on contrast reduction of MIEZE measurements and its minimisation. Finally we present a design case for enhancing a small-angle neutron scattering (SANS) instrument at the planned European Spallation Source (ESS) in Lund, Sweden, using a combination of MIEZE and other TOF options, such as TISANE offering time windows from ns to minutes. The proposed instrument would allow obtaining an excellent energy- and Q-resolution straightforward to μs for 0.01 -1, even in magnetic fields, depolarising samples as they occur in soft matter and magnetism while keeping the instrumental effort and costs low.
KW - ESS
KW - MIEZE
KW - NSE
KW - Resolution function
UR - http://www.scopus.com/inward/record.url?scp=80052904618&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2011.07.003
DO - 10.1016/j.nima.2011.07.003
M3 - Article
AN - SCOPUS:80052904618
SN - 0168-9002
VL - 654
SP - 394
EP - 398
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
IS - 1
ER -