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Neutron reflectivity and interface roughness in Ni/Ti and FeCoV/TiNx supermirrors

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Title Neutron reflectivity and interface roughness in Ni/Ti and FeCoV/TiNx supermirrors
 
Creator KUMAR, MS
BONI, P
HORISBERGER, M
 
Subject multilayers
supermirror
multilayer
interface roughness
polarizer
 
Description Supermirrors based on various multilayer systems such as Ni/Ti and FeCoV/TiNx are used in neutron optical devices. In this paper, we report on investigations carried out in order to understand the influence of interface roughness on the neutron reflectivity. In the case of Ni/Ti mirrors, the measured neutron reflectivity of mirrors having m = 3.65 (600 layers) that are prepared under various sputtering conditions shows that the interface roughness of the samples sputtered only in Ar is large. To be specific, the thinner layers have low roughness when compared with thicker layers and only about 150 layers on the top are responsible for the considerable reduction in the reflectivity. In the case of FeCoV/TiNx mirrors, the use of TiGd/TiNx multilayer absorbers show considerable improvement in the performance of the mirrors. (C) 2004 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-10-23T08:42:57Z
2011-12-15T09:11:04Z
2011-10-23T08:42:57Z
2011-12-15T09:11:04Z
2004
 
Type Article; Proceedings Paper
 
Identifier NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,529,90-93
0168-9002
http://dx.doi.org/10.1016/j.nima.2004.04.184
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15077
http://hdl.handle.net/100/1827
 
Source Interantional Conference on Neutron Optics (NOP2004),Tokyo, JAPAN,JAN 12-16, 2004
 
Language English