ON THE SAGITTAL FOCUSING OF SYNCHROTRON RADIATION WITH A DOUBLE CRYSTAL MONOCHROMATOR

Authors
KUSHNIR VI QUINTANA JP GEORGOPOULOS P
Citation
Vi. Kushnir et al., ON THE SAGITTAL FOCUSING OF SYNCHROTRON RADIATION WITH A DOUBLE CRYSTAL MONOCHROMATOR, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 328(3), 1993, pp. 588-591
Citations number
9
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
328
Issue
3
Year of publication
1993
Pages
588 - 591
Database
ISI
SICI code
0168-9002(1993)328:3<588:OTSFOS>2.0.ZU;2-4
Abstract
A method to avoid the anticlastic bending of the second crystal in a t wo-crystal monochromator for synchrotron radiation is proposed. It is analytically shown that the anticlastic curvature is zero at the cente r of the crystal for a simply supported isotropic crystal loaded with a constant moment provided that the crystal's aspect ratio is equal to a ''golden value'' dependent on the Poisson coefficient nu. For nu = 0.262 (equal to nu in the Si(111) plane) this ratio is 2.360. Finite e lement results are presented on the case of the clamped crystal and sh ow that there is a similar ''golden value'' approximately equal to 1.4 2 for nu = 0.262.