Pramana | |
AMOR – the time-of-flight neutron reflectometer at SINQ/PSI | |
J Stahn1  P Keller1  T Gutberlet11  Mukul Gupta11  D Clemens11  | |
[1] Laboratory for Neutron Scattering, ETHZ & PSI, Paul Scherrer Institute, Villigen, CH-5232, Switzerland$$ | |
关键词: Apparatus for multioptional reflectometry; neutron reflectivity; neutron reflectometer; time-of-flight; polarized neutrons; liquid interfaces.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
The apparatus for multioptional reflectometry (AMOR) at SINQ/PSI is a versatile reflectometer operational in the time-of-flight (TOF) mode (in a wavelength range of 0.15 nm > 𜆠> 1.3 nm) as well as in the monochromatic (𜃠- 2ðœƒ) mode with both polarized and unpolarized neutrons. AMOR is designed to perform reflectometry measurements in horizontal sample-plane geometry which allows studying both solid–liquid and liquid–liquid interfaces. A pulsed cold neutron beam from the end position of the neutron guide is produced by a dual-chopper system (side-by-side) having two windows at 180° and rotatable with a maximum frequency of 200 Hz. In the TOF mode, the chopper frequency, width of the gating window and the chopper–detector distance can be selected independently providing a wide range of ð‘ž-resolution (𛥠ð‘ž/ð‘ž = 1–10%). Remanent FeCoV/Ti : N supermirrors are used as polarizer/analyzer with a polarization efficiency of ∼ 97%. For the monochromatic wavelength mode, a Ni/Ti multilayer is used as a monochromator, giving ∼ 50% reflectivity at a wavelength of 0.47 nm. In the present work, a detailed description of the instrument and setting-up of the polarization option is described. Results from some of the recent studies with polarized neutrons and measurements on liquid surfaces are presented.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040496629ZK.pdf | 1116KB | download |