title: Two crystal x-ray spectrometers for OMEGA experiments.
abstract: Two x-ray spectrometers have been built for x-ray spectroscopy of laser-produced plasmas on OMEGA at the Laboratory for Laser Energetics (LLE) by Commissariat à l'Energie Atomique et aux énergies alternatives (CEA). The accessible photon energy range is from 1.5 to 20 keV. The first spectrometer, called X-ray CEA Crystal Spectrometer with a Charge-Injection Device (XCCS-CID), records three spectra with three crystals coupled to a time integrated CID camera. The second one, called X-ray CEA Crystal Spectrometer (XCCS) with a framing camera, is time resolved and records four spectra with two crystals on the four frames of a framing camera. Cylindrical crystals are used in Johan geometry. Each spectrometer is positioned with a ten-inch manipulator inside the OMEGA target chamber. In each experiment, after choosing a spectral window, a specific configuration is designed and concave crystals are precisely positioned on a board with angled wedges and spacers. Slits on snouts enable 1D spatial resolution to distinguish spectra emitted from different parts of the target.
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: C
authors.initials: C
authors.lastname: Reverdin
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: A
authors.initials: A
authors.lastname: Casner
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: F
authors.initials: F
authors.lastname: Girard
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: L
authors.initials: L
authors.lastname: Lecherbourg
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: B
authors.initials: B
authors.lastname: Loupias
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: V
authors.initials: V
authors.lastname: Tassin
authors.affiliation: CEA-DAM-DIF, F-91297 Arpajon, France.
authors.forename: F
authors.initials: F
authors.lastname: Philippe