Author: Roth, T.
Paper Title Page
ESRF Double Crystal Monochromator - Design and Working Modes  
  • R. Baker, R. Barrett, P. Bernard, G. Berruyer, J. Bonnefoy, M. Brendike, L. Ducotté, H. Gonzalez, T. Roth, P. Tardieu
    ESRF, Grenoble, France
  The ESRF-Double Crystal Monochromator (ESRF-DCM) has been designed and developed in-house to enable several spectroscopy beamlines to exploit the full potential of the ESRF-EBS upgrade, implemented in 2019 - 2020. To reach concomitant beam positioning accuracy and stability, particular attention has been paid to mechanical and thermal stability, which has imposed the implementation of several innovative design concepts. To meet the extremely challenging specifications of the ESRF DCM implies not only high precision mechanical design, but also a mechatronic system enabling the active correction of the parallelism between crystals. Online metrology, associated with a controller capable of real-time signal processing have been implemented. A prototype has been partially validated and production of the first batch (two ESRF DCMs) is in progress. This presentation will give an overview of the DCM design principles and operating modes, then show how the calibration process is performed in situ on the beamline, using x-rays and associated instrumentation, and will explain the working principle of the active correction mode. To conclude, some characterisations of the DCM performances with x-rays will be presented.  
slides icon Slides MOOB01 [3.202 MB]  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
MOPC03 Diamond Refractive Optics Fabrication by Laser Ablation and at-Wavelength Testing 59
  • S.P. Antipov, E. Gomez
    Euclid TechLabs, Solon, Ohio, USA
  • R. Celestre, T. Roth
    ESRF, Grenoble, France
  Funding: SBIR grant #DE-SC0013129
The next generation light sources will require x-ray optical components capable of handling large instantaneous and average power densities while tailoring the properties of the x-ray beams for a variety of scientific experiments. Diamond being radiation hard, low Z material with outstanding thermal properties is proposed for front pre-focusing optics applications. Euclid Techlabs had been developing x-ray refractive diamond lens to meet this need. Standard deviation of lens shape error figure gradually was decreased to sub-micron values. Post-ablation polishing procedure yields ~ 10nm surface roughness. In this paper we will report on recent developments towards beamline-ready lens including packaging and compound refractive lens stacking. Diamond lens fabrication is done by femtosecond laser micromachining. We had been using this technology for customization of other beamline components. Several application cases will be highlighted in this presentation: diamond anvils, x-ray flow cells and in-beam mirrors.
poster icon Poster MOPC03 [1.754 MB]  
DOI • reference for this paper ※  
About • paper received ※ 21 July 2021       paper accepted ※ 01 October 2021       issue date ※ 01 November 2021  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)