Author/Authors :
Erko، نويسنده , , A. and Packe، نويسنده , , I. and Gudat، نويسنده , , W. and Abrosimov، نويسنده , , N. and Firsov، نويسنده , , A.، نويسنده ,
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 of 3–6 were obtained with a naturally divergent synchrotron beam. Effective X-ray beam collimation was experimentally observed by using a graded crystal with optimally bent crystal lattice.
