| 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) | C2-333 - C2-334 | |
| DOI | https://doi.org/10.1051/jp4/1997217 | |
Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure
J. Phys. IV France 7 (1997) C2-333-C2-334
DOI: 10.1051/jp4/1997217
1 European Synchrotron Radiation Facility, BP. 220, 38043 Grenoble cedex, France
2 European Synchrotron Radiation Facility, BP. 220, 38043 Grenoble cedex France
© EDP Sciences 1997
J. Phys. IV France 7 (1997) C2-333-C2-334
DOI: 10.1051/jp4/1997217
Ultra High Harmonie Rejection using Multilayers
P.W. Loeffen1, S. Müllender1, J. Goulon1, A. Filipponi1, M. Lingham1, E. Ziegler2 and E. Lüken11 European Synchrotron Radiation Facility, BP. 220, 38043 Grenoble cedex, France
2 European Synchrotron Radiation Facility, BP. 220, 38043 Grenoble cedex France
Abstract
A novel instrument recently installed on BM29 at the ESRF has been shown to yield harmonic suppression
of the order of 10-6 . It comprises two mirrors coated with W/Si multilayers which operate in Bragg diffraction mode
like a second monochromator with a poor energy resolution. The device is a tunable filter with an energy band width
of ~ 3 % and a total throughput of about 30 %. The harmonic suppression from the multilayers is shown to be
three orders of magnitude more effective than that achieved via detuning of the monochromator crystals. The system
provides an efficient way to eliminate the second harmonic transmitted from Si[220] monochromators.
© EDP Sciences 1997