| Numéro |
J. Phys. IV France
Volume 7, Numéro C2, Avril 1997
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
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|---|---|---|
| Page(s) | C2-549 - C2-552 | |
| DOI | https://doi.org/10.1051/jp4/1997093 | |
J. Phys. IV France 7 (1997) C2-549-C2-552
DOI: 10.1051/jp4/1997093
XANES Registration by Electron Beam Position Scanning for Time-Resolved Experiment
S.G. Nikitenko1, B.P. Tolochko2, A.N. Aleshaev3, G.N. Kulipanov3 and S.I. Mishnev31 Siberian SR Centre (SSRC) of Budker Institute of Nuclear Physics, Institute of Catalysis, Novosibirsk 630090, Russia
2 Siberian SR Centre (SSRC) of Budker Institute of Nuclear Physics, Institute of Solid State Chemistry, Novosibirsk 630128, Russia
3 Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
Abstract
A new method of XANES registration has been designed and realised at VEPP-3. Traditionally, the
monochromator rotation is used for the energy scanning. In this new method, the position of the monochromator is
fixed, but the position of the electron beam is changed by the magnetic field. As a result, the angle SRbeam/
monochromator is changed thus changing the energy of the monochromatic beam. We registered test-XANES
spectra of Ag by electron beam position scanning and then used this method to investigate fast Ag reduction from
organometallic compounds. Depending on the type of monochromator and on the energy interval, XAFS spectra may
be measured now within 6-20 s. Traditional QEXAFS has a natural limit, depending on the mass of the crystal of the
monochromator, holder and translation stage. The mass of the electrons in the bunch is very small and there is no limit
for fast scanning. The use of an undulator as synchrotron radiation source can improve the time resolution of this
method by several orders of magnitude and reach nanosecond region.
© EDP Sciences 1997