On the characterisation of a Bragg spectrometer with X-rays from an ECR source

Narrow X-ray lines from helium-like argon emitted from a dedicated ECR source have been used to determine the response function of a Bragg crystal spectrometer equipped with large area spherically bent silicon (1 1 1) or quartz ( 1 0 1 ¯ ) crystals. The measured spectra are compared with simulated ones created by a ray-tracing code based on the expected theoretical crystalʹs rocking curve and the geometry of the experimental set-up.