Design and performance of AERHA, a high acceptance high resolution soft x-ray spectrometer

Sorin G. Chiuzbaian , Coryn F. Hague , Antoine Avila , Renaud Delaunay , Nicolas Jaouen , Maurizio Sacchi (1) , Francois Polack , Muriel Thomasset , Bruno Lagarde , Alessandro Nicolaou , Stefania Brignolo , Cedric Baumier , Jan Luening , Jean-Michel Mariot

1 INSP - Institut des Nanosciences de Paris

A soft x-ray spectrometer based on the use of an elliptical focusing mirror and a plane varied line spacing grating is described. It achieves both high resolution and high overall efficiency while remaining relatively compact. The instrument is dedicated to resonant inelastic x-ray scattering studies. We set out how this optical arrangement was judged best able to guarantee performance for the 50 1000 eV range within achievable fabrication targets. The AERHA (adjustable energy resolution high acceptance) spectrometer operates with an effective angular acceptance between 100 and 250 mu sr (energy dependent) and a resolving power well in excess of 5000 according to the Rayleigh criterion. The high angular acceptance is obtained by means of a collecting pre-mirror. Three scattering geometries are available to enable momentum dependent measurements with 135 degrees, 90 degrees, and 50 degrees scattering angles. The instrument operates on the Synchrotron SOLEIL SEXTANTS beamline which serves as a high photon flux 2 x 200 mu m(2) focal spot source with full polarization control. (C) 2014 AIP Publishing LLC.

Domaines: Matière Condensée [cond-mat]

Sorin G. Chiuzbaian, Coryn F. Hague, Antoine Avila, Renaud Delaunay, Nicolas Jaouen, et al.. Design and performance of AERHA, a high acceptance high resolution soft x-ray spectrometer. Review of Scientific Instruments, 2014, 85 (4), pp.043108. ⟨10.1063/1.4871362⟩. ⟨hal-01240499⟩