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Detectors for energy-dispersive EXAFS (EDE) experiments

Detectors for energy-dispersive EXAFS (EDE) experiments
Detectors for energy-dispersive EXAFS (EDE) experiments
EXAFS, X-ray absorption spectroscopy fine structure, has been an important tool within synchrotron radiation science for some years. It has been used extensively in step scanning mode to provide information on the local environment within both static and slowly changing samples. Energy-dispersive EXAFS (EDE) allows similar information to be collected in a significantly shorter time frame, enabling the study of truly dynamically changing samples. The technique uses a bent crystal monochromator to focus an energy-dispersed X-ray beam onto a sample which then impinges upon an array detector positioned behind the sample. This allows the absorption over a range of energies to be collected in a very short period. Until recently only few systems have existed for this technique, typically employing commercially available detectors originally constructed for other applications. These presented limitations in speed, energy resolution, linearity and dynamic range and could only follow changes in the millisecond range. Using UK ESPRC grant funds, a new detector has been developed (XSTRIP) which shows great improvements over the above limitations and has demonstrated the potential to open new areas of science to researchers. This paper will present the technique, some of the historical limitations, the performance increase afforded by the XSTRIP system and an overview of the future direction of detectors for this most exciting and important technique.
x-ray detectors, exafs, instrumentation x-ray-absorption, photodiode-array, synchrotron radiation, electron-transfer, fine-structure, spectroscopy, catalyst, systems, mode, timescale
0168-9002
27-34
Salvini, Giuseppe
1d38902e-1d02-4fe3-8bdd-fbbe1d13aed2
Headspith, Jon
e7e5304a-94b0-4fa7-b270-7120107df44e
Thomas, Stephen L.
43abbda0-5f7e-4adb-8eb8-a6c9c6304de7
Derbyshire, Gareth
4dd1e2d7-0b19-4a33-a2b7-67f1c66c729a
Dent, Andy
117bccb3-645d-4f0e-97bc-244cb498f01c
Rayment, Trevor
aaf0c284-4a09-4531-8255-4731b5588ac1
Evans, John
05890433-0155-49fe-a65d-38c90ea25c69
Farrow, Richard
cf6420bd-4c2a-4483-adb9-144bb6e754fb
Diaz-Moreno, Sofia
4e280df3-7f62-4280-8058-2803c740ae00
Ponchut, Cyril
c97fc48d-127a-4fcd-b8f1-2f8578d4acc1
Paszkowicz, Wojciech
e30dbb8a-7f7a-4570-81dd-90ef7b27aa87
Zięba, Andrzej
bae5126c-67cf-4605-b543-973250e926a2
Salvini, Giuseppe
1d38902e-1d02-4fe3-8bdd-fbbe1d13aed2
Headspith, Jon
e7e5304a-94b0-4fa7-b270-7120107df44e
Thomas, Stephen L.
43abbda0-5f7e-4adb-8eb8-a6c9c6304de7
Derbyshire, Gareth
4dd1e2d7-0b19-4a33-a2b7-67f1c66c729a
Dent, Andy
117bccb3-645d-4f0e-97bc-244cb498f01c
Rayment, Trevor
aaf0c284-4a09-4531-8255-4731b5588ac1
Evans, John
05890433-0155-49fe-a65d-38c90ea25c69
Farrow, Richard
cf6420bd-4c2a-4483-adb9-144bb6e754fb
Diaz-Moreno, Sofia
4e280df3-7f62-4280-8058-2803c740ae00
Ponchut, Cyril
c97fc48d-127a-4fcd-b8f1-2f8578d4acc1
Paszkowicz, Wojciech
e30dbb8a-7f7a-4570-81dd-90ef7b27aa87
Zięba, Andrzej
bae5126c-67cf-4605-b543-973250e926a2

Salvini, Giuseppe, Headspith, Jon, Thomas, Stephen L., Derbyshire, Gareth, Dent, Andy, Rayment, Trevor, Evans, John, Farrow, Richard, Diaz-Moreno, Sofia and Ponchut, Cyril , Paszkowicz, Wojciech and Zięba, Andrzej (eds.) (2005) Detectors for energy-dispersive EXAFS (EDE) experiments. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 551 (1), 27-34. (doi:10.1016/j.nima.2005.07.039).

Record type: Article

Abstract

EXAFS, X-ray absorption spectroscopy fine structure, has been an important tool within synchrotron radiation science for some years. It has been used extensively in step scanning mode to provide information on the local environment within both static and slowly changing samples. Energy-dispersive EXAFS (EDE) allows similar information to be collected in a significantly shorter time frame, enabling the study of truly dynamically changing samples. The technique uses a bent crystal monochromator to focus an energy-dispersed X-ray beam onto a sample which then impinges upon an array detector positioned behind the sample. This allows the absorption over a range of energies to be collected in a very short period. Until recently only few systems have existed for this technique, typically employing commercially available detectors originally constructed for other applications. These presented limitations in speed, energy resolution, linearity and dynamic range and could only follow changes in the millisecond range. Using UK ESPRC grant funds, a new detector has been developed (XSTRIP) which shows great improvements over the above limitations and has demonstrated the potential to open new areas of science to researchers. This paper will present the technique, some of the historical limitations, the performance increase afforded by the XSTRIP system and an overview of the future direction of detectors for this most exciting and important technique.

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More information

Published date: 1 October 2005
Additional Information: Proceedings of the E-MRS Fall Meeting 2004 Symposium D: Applications of Linear and Area Detectors for X-Ray and Neutron Diffraction and Spectroscopy
Keywords: x-ray detectors, exafs, instrumentation x-ray-absorption, photodiode-array, synchrotron radiation, electron-transfer, fine-structure, spectroscopy, catalyst, systems, mode, timescale
Organisations: Chemistry

Identifiers

Local EPrints ID: 20904
URI: http://eprints.soton.ac.uk/id/eprint/20904
ISSN: 0168-9002
PURE UUID: aeb47376-5548-4b8f-9f3e-023be118b580

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Date deposited: 01 Mar 2006
Last modified: 06 Oct 2020 23:43

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Contributors

Author: Giuseppe Salvini
Author: Jon Headspith
Author: Stephen L. Thomas
Author: Gareth Derbyshire
Author: Andy Dent
Author: Trevor Rayment
Author: John Evans
Author: Richard Farrow
Author: Sofia Diaz-Moreno
Author: Cyril Ponchut
Editor: Wojciech Paszkowicz
Editor: Andrzej Zięba

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