Upgrade of the wide-angle neutron diffractometer at the high-flux isotope reactor

S. Katano; Y. Ishii; Y. Morii; H. R. Child; J. A. Fernandez-Baca

doi:10.1016/S0921-4526(97)00550-4

Upgrade of the wide-angle neutron diffractometer at the high-flux isotope reactor

S. Katano, Y. Ishii, Y. Morii, H. R. Child, J. A. Fernandez-Baca

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Abstract

The wide-angle neutron diffractometer (WAND) is an instrument that can be used either as a flat-cone geometry diffractometer or as a fast powder diffractometer. This instrument is located at the high-flux isotope reactor (HFIR), and is currently being upgraded. The central part of this upgrade is the development of a new curved one-dimensional position sensitive detector which covers a 125° angular range with an effective radius of 71 cm. This detector will be a multi-anode (624 anodes on a 0.2° pitch) ³He gas-filled proportional counter. This totally new system will give high resolution, good uniformity and high counting rate - a maximum capability of 10⁵ cps/pixel and a 10⁷ cps overall. A prototype of this detector has shown that these design targets can be met. The new WAND will greatly broaden the capabilities for single-crystal diffraction experiments and for time-resolved measurements.

Original language	English
Pages (from-to)	198-200
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	241-243
DOIs	https://doi.org/10.1016/S0921-4526(97)00550-4
State	Published - 1997

Funding

This work was supported by JAERI and ORNL under the JAERI-DOE cooperative program on neutron scattering. ORNL is managed by Lockheed Martin Energy Research Corp. for the US DOE under contract number DE-AC05-96OR22464.

Funders	Funder number
Lockheed Martin Energy Research Corp.
U.S. Department of Energy	DE-AC05-96OR22464
Oak Ridge National Laboratory
Japan Atomic Energy Research Institute

Keywords

Curved one-dimensional position sensitive detector
Diffractometer
Flat-cone geometry
HFIR
WAND

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10.1016/S0921-4526(97)00550-4

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abstract = "The wide-angle neutron diffractometer (WAND) is an instrument that can be used either as a flat-cone geometry diffractometer or as a fast powder diffractometer. This instrument is located at the high-flux isotope reactor (HFIR), and is currently being upgraded. The central part of this upgrade is the development of a new curved one-dimensional position sensitive detector which covers a 125° angular range with an effective radius of 71 cm. This detector will be a multi-anode (624 anodes on a 0.2° pitch) 3He gas-filled proportional counter. This totally new system will give high resolution, good uniformity and high counting rate - a maximum capability of 105 cps/pixel and a 107 cps overall. A prototype of this detector has shown that these design targets can be met. The new WAND will greatly broaden the capabilities for single-crystal diffraction experiments and for time-resolved measurements.",

keywords = "Curved one-dimensional position sensitive detector, Diffractometer, Flat-cone geometry, HFIR, WAND",

author = "S. Katano and Y. Ishii and Y. Morii and Child, {H. R.} and Fernandez-Baca, {J. A.}",

year = "1997",

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AU - Child, H. R.

AU - Fernandez-Baca, J. A.

PY - 1997

Y1 - 1997

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AB - The wide-angle neutron diffractometer (WAND) is an instrument that can be used either as a flat-cone geometry diffractometer or as a fast powder diffractometer. This instrument is located at the high-flux isotope reactor (HFIR), and is currently being upgraded. The central part of this upgrade is the development of a new curved one-dimensional position sensitive detector which covers a 125° angular range with an effective radius of 71 cm. This detector will be a multi-anode (624 anodes on a 0.2° pitch) 3He gas-filled proportional counter. This totally new system will give high resolution, good uniformity and high counting rate - a maximum capability of 105 cps/pixel and a 107 cps overall. A prototype of this detector has shown that these design targets can be met. The new WAND will greatly broaden the capabilities for single-crystal diffraction experiments and for time-resolved measurements.

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ER -

Upgrade of the wide-angle neutron diffractometer at the high-flux isotope reactor

Abstract

Funding

Keywords

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