Spectrometer for X-ray emission experiments at FERMI free-electron-laser

L Poletto; F Frassetto; P Miotti; A Di Cicco; P Finetti; C Grazioli; F Iesari; A Kivimäki; S Stagira; M Coreno

doi:10.1063/1.4898315

Spectrometer for X-ray emission experiments at FERMI free-electron-laser

Rev Sci Instrum. 2014 Oct;85(10):103112. doi: 10.1063/1.4898315.

Authors

L Poletto¹, F Frassetto¹, P Miotti¹, A Di Cicco², P Finetti³, C Grazioli⁴, F Iesari², A Kivimäki⁵, S Stagira⁶, M Coreno³

Affiliations

¹ CNR - Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, I-35131 Padova, Italy.
² Physics Division, School of Science and Technology, Università di Camerino, I-62032 Camerino (MC), Italy.
³ ELETTRA - Sincrotrone Trieste, Basovizza Area Science Park, S. S. 14 - km 163,5, I-34149, Basovizza (TS), Italy.
⁴ Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, I-34127 Trieste, Italy.
⁵ CNR-Istituto Officina dei Materiali (CNR-IOM), Laboratorio TASC, I-34149 Trieste, Italy.
⁶ Politecnico di Milano - Department of Physics, I-20133 Milano, Italy.

PMID: 25362376
DOI: 10.1063/1.4898315

Abstract

A portable and compact photon spectrometer to be used for photon in-photon out experiments, in particular x-ray emission spectroscopy, is presented. The instrument operates in the 25-800 eV energy range to cover the full emissions of the FEL1 and FEL2 stages of FERMI. The optical design consists of two interchangeable spherical varied-lined-spaced gratings and a CCD detector. Different input sections can be accommodated, with/without an entrance slit and with/without an additional relay mirror, that allow to mount the spectrometer in different end-stations and at variable distances from the target area both at synchrotron and at free-electron-laser beamlines. The characterization on the Gas Phase beamline at ELETTRA Synchrotron (Italy) is presented.