Efficiency of gratings in the conical diffraction mounting for an EUV time-compensated monochromator

L. Poletto, S. Bonora, M. Pascolini, F. Borgatti, B. Doyle, A. Giglia, N. Mahne, M. Pedio, S. Nannarone

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


Recent measurements of the absolute diffraction efficiency of plane gratings in the conical diffraction mounting (in which the light approaches the grating in the plane parallel to the direction of the grooves) are presented. Three gratings have been tested at the beamline BEAR (Elettra Synchrotron, Trieste) in the 10-130 nm region, showing a peak efficiency as high as 70%. The aim of these measurements is the use of two gratings in the conical diffraction mounting for the realization of a high-throughput time-compensated monochromator for the spectral selection of high-order harmonic radiation produced by the interaction between an ultrashort laser pulse (less than 100 fs) and a gas jet. The monochromatic and ultrashort pulse at the monochromator exit can be used for the injection of a Free Electron Laser. The theory of the time-compensation with gratings will be briefly resumed, the design of the monochromator will be presented, and the results of the measurements at BEAR will be discussed.

Original languageEnglish
Article number23
Pages (from-to)144-153
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 2004
Externally publishedYes
EventFourth Generation X-Ray Sources and Optics II - Denver, CO, United States
Duration: 2 Aug 20043 Aug 2004


  • Conical diffraction
  • Time-compensated monochromator
  • Ultrafast optics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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