RESUMO
A scanning dynamically focusing sagittal X-ray monochromator accepting 7 mrad of the fan from a 6 T wiggler is in routine use on beamline 16.5 (ultra-dilute spectroscopy) of the SRS at CCLRC Daresbury Laboratory, UK. The energy range covered is 7-27 keV, with a horizontal spot size of <1.1 mm FWHM. Measured monochromatic flux from a Si 220 crystal pair is 1 x 10(11) photons s(-1) (100 mA)(-1) at 9 keV. This level of flux, usually associated with an insertion device on a third-generation source, permits collection of EXAFS data on concentrations at or below 10 ppm.
Assuntos
Microquímica/instrumentação , Robótica/instrumentação , Espectrometria por Raios X/instrumentação , Síncrotrons/instrumentação , Difração de Raios X/instrumentação , Desenho de Equipamento , Análise de Falha de Equipamento , Microquímica/métodos , Reprodutibilidade dos Testes , Robótica/métodos , Sensibilidade e Especificidade , Espectrometria por Raios X/métodos , Difração de Raios X/métodosRESUMO
Following the completion of the collaborative project between CLRC Daresbury Laboratory and EG&G ORTEC to develop the world's first 30-element HPGe detector for fluorescence XAFS, it has now been tested and commissioned at the SRS. The system was commissioned with the XSPRESS digital pulse-processing electronics and this has demonstrated processed count rates in excess of 10 MHz. Initial data have been recorded and are presented.
