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Title: Flux Gain for Next-Generation Neutron-Scattering Instruments Resulting From Improved Supermirror Performance

Abstract

Next-generation spallation neutron source facilities will offer instruments with unprecedented capabilities through simultaneous enhancement of source power and usage of advanced optical components. The Spallation Neutron Source (SNS), already under construction at Oak Ridge National Laboratory and scheduled to be completed by 2006, will provide greater than an order of magnitude more effective source flux than current state-of-the-art facilities, including the most advanced research reactors. An additional order of magnitude gain is expected through the use of new optical devices and instrumentation concepts. Many instrument designs require supermirror (SM) neutron guides with very high critical angles for total reflection. In this contribution, they discuss how the performance of modern neutron scattering instruments depends on the efficiency of these supermirrors. They outline ideas for enhancing the performance of the SM coatings, particularly for improving the reflectivity at the position of the critical wave vector transfer. A simulation program has been developed which allows different approaches for SM designs to be studied. Possible instrument performance gains are calculated for the example of the SNS reflectometer.

Authors:
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
788629
Report Number(s):
P01-111262
Journal ID: ISSN 0277-786X; TRN: US0200144
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 4509; Conference: Society of Photo-Optical Instrumentation Engineers (SPIES Conference), Conference location not supplied, Conference dates not supplied; Other Information: PBD: 11 Jul 2001
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; COATINGS; EFFICIENCY; NEUTRON GUIDES; NEUTRON SOURCE FACILITIES; NEUTRON SOURCES; PERFORMANCE; SPALLATION; MIRRORS; NEUTRON DIFFRACTOMETERS; NEUTRON SCATTERING, NEUTRON GU

Citation Formats

Rehm, C. Flux Gain for Next-Generation Neutron-Scattering Instruments Resulting From Improved Supermirror Performance. United States: N. p., 2001. Web. doi:10.1117/12.448076.
Rehm, C. Flux Gain for Next-Generation Neutron-Scattering Instruments Resulting From Improved Supermirror Performance. United States. doi:10.1117/12.448076.
Rehm, C. Wed . "Flux Gain for Next-Generation Neutron-Scattering Instruments Resulting From Improved Supermirror Performance". United States. doi:10.1117/12.448076. https://www.osti.gov/servlets/purl/788629.
@article{osti_788629,
title = {Flux Gain for Next-Generation Neutron-Scattering Instruments Resulting From Improved Supermirror Performance},
author = {Rehm, C},
abstractNote = {Next-generation spallation neutron source facilities will offer instruments with unprecedented capabilities through simultaneous enhancement of source power and usage of advanced optical components. The Spallation Neutron Source (SNS), already under construction at Oak Ridge National Laboratory and scheduled to be completed by 2006, will provide greater than an order of magnitude more effective source flux than current state-of-the-art facilities, including the most advanced research reactors. An additional order of magnitude gain is expected through the use of new optical devices and instrumentation concepts. Many instrument designs require supermirror (SM) neutron guides with very high critical angles for total reflection. In this contribution, they discuss how the performance of modern neutron scattering instruments depends on the efficiency of these supermirrors. They outline ideas for enhancing the performance of the SM coatings, particularly for improving the reflectivity at the position of the critical wave vector transfer. A simulation program has been developed which allows different approaches for SM designs to be studied. Possible instrument performance gains are calculated for the example of the SNS reflectometer.},
doi = {10.1117/12.448076},
journal = {},
issn = {0277-786X},
number = ,
volume = 4509,
place = {United States},
year = {2001},
month = {7}
}

Conference:
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