Focusing x-rays to a 1 {mu}m spot using elastically bent, graded multilayer-coated mirrors
- Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
In the LBNL x-ray fluorescence microprobe, a synchrotron source of x-rays is demagnified several hundred times using a pair of mirrors in the Kirkpatrick-Baez configuration. These are coated with multilayers to increase reflectivity and limit the pass band of the x-rays striking the sample. With spherical mirrors, the spot size obtained is limited by spherical aberration. This can be corrected by using an initially flat mirror elastically bent by a combination of end couples into an ellipse. By grading the multilayer coatings in d-spacing, the throughput of the focusing system is increased and the pass band narrowed. A pair of such mirrors, installed in the microprobe on a bending magnet at the Advanced Light Source (ALS), achieved focal spots of dimensions 1{mu}m{times}1 {mu}m at energies of 8.5 keV and 12 keV, with an energy pass band of 10{percent}. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Lawrence Berkeley National Laboratory
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 389556
- Report Number(s):
- CONF-9510119--
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 67; ISSN RSINAK; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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