System for calibrating the energy-dependent response of an elliptical Bragg-crystal spectrometer

R E Marrs; G V Brown; J A Emig; R F Heeter

doi:10.1063/1.4892552

System for calibrating the energy-dependent response of an elliptical Bragg-crystal spectrometer

Rev Sci Instrum. 2014 Nov;85(11):11D626. doi: 10.1063/1.4892552.

Authors

R E Marrs¹, G V Brown¹, J A Emig¹, R F Heeter¹

Affiliation

¹ Lawrence Livermore National Laboratory, Livermore, California 94551, USA.

PMID: 25430202
DOI: 10.1063/1.4892552

Abstract

A multipurpose spectrometer (MSPEC) with elliptical crystals is in routine use to obtain x-ray spectra from laser produced plasmas in the energy range 1.0-9.0 keV. Knowledge of the energy-dependent response of the spectrometer is required for an accurate comparison of the intensities of x-ray lines of different energy. The energy-dependent response of the MSPEC has now been derived from the spectrometer geometry and calibration information on the response of its components, including two different types of detectors. Measurements of the spectrometer response with a laboratory x-ray source are used to test the calculated response and provide information on crystal reflectivity and uniformity.