A crystal monochromator based on graded SiGe crystals

Authors
Erko, A Packe, I Gudat, W Abrosimov, N Firsov, A
Citation
A. Erko et al., A crystal monochromator based on graded SiGe crystals, NUCL INST A, 467, 2001, pp. 623-626
Citations number
8
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
467
Year of publication
2001
Part
1
Pages
623 - 626
Database
ISI
SICI code
0168-9002(20010721)467:<623:ACMBOG>2.0.ZU;2-2
Abstract
A double SiGe crystal monochromator with a Ge concentration gradient of 0.8 %/cm along the crystal surface has been tested using the KMC-2 beamline at BESSY. In comparison with conventional Si crystals an enhancement of energy resolution of 3-8 times with simultaneously an increase of spectral flux o f 3-6 were obtained with a naturally divergent synchrotron beam. Effective X-ray beam collimation was experimentally observed by using a graded crysta l with optimally bent crystal lattice. (C) 2001 Elsevier Science B.V. All r ights reserved.