| Autor: |
Desjardins K; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Medjoubi K; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Sacchi M; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Popescu H; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Gaudemer R; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Belkhou R; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Stanescu S; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Swaraj S; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Besson A; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Vijayakumar J; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Pautard S; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Noureddine A; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Mercère P; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Da Silva P; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Orsini F; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Menneglier C; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France., Jaouen N; Synchrotron SOLEIL, Saint-Aubin, Gif-sur-Yvette, 91192, France. |
| Abstrakt: |
The impressive progress in the performance of synchrotron radiation sources is nowadays driven by the so-called `ultimate storage ring' projects which promise an unprecedented improvement in brightness. Progress on the detector side has not always been at the same pace, especially as far as soft X-ray 2D detectors are concerned. While the most commonly used detectors are still based on microchannel plates or CCD technology, recent developments of CMOS (complementary metal oxide semiconductor)-type detectors will play an ever more important role as 2D detectors in the soft X-ray range. This paper describes the capabilities and performance of a camera equipped with a newly commercialized backside-illuminated scientific CMOS (sCMOS-BSI) sensor, integrated in a vacuum environment, for soft X-ray experiments at synchrotron sources. The 4 Mpixel sensor reaches a frame rate of up to 48 frames s -1 while matching the requirements for X-ray experiments in terms of high-intensity linearity (>98%), good spatial homogeneity (<1%), high charge capacity (up to 80 ke - ), and low readout noise (down to 2 e - r.m.s.) and dark current (3 e - per second per pixel). Performance evaluations in the soft X-ray range have been carried out at the METROLOGIE beamline of the SOLEIL synchrotron. The quantum efficiency, spatial resolution (24 line-pairs mm -1 ), energy resolution (<100 eV) and radiation damage versus the X-ray dose (<600 Gy) have been measured in the energy range from 40 to 2000 eV. In order to illustrate the capabilities of this new sCMOS-BSI sensor, several experiments have been performed at the SEXTANTS and HERMES soft X-ray beamlines of the SOLEIL synchrotron: acquisition of a coherent diffraction pattern from a pinhole at 186 eV, a scattering experiment from a nanostructured Co/Cu multilayer at 767 eV and ptychographic imaging in transmission at 706 eV. |
