Recent developments at the COMET instrument of the SEXTANTS beamline at SOLEIL. Issue 1 (1st December 2022)

• Record Type: Journal Article
• Authors: Popescu, Horia; Desjardins, Kewin; Pinty, Victor; Carcy, Alexandre; Leveille, Cyril; Gaudemer, Roland; Sacchi, Maurizio; Jaouen, Nicolas
• Is Part Of: Journal of physics. Volume 2380 Issue 1(2022)
• Publication Date: 2022-12-01
• Subjects: Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/2380/1/012046
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The COMET experimental station at SEXTANTS beamline of the SOLEIL synchrotron is dedicated to the coherent imaging of magnetic domains, using holography and ptychography, in a sample environment including magnetic fields up to 0.9 T, temperature range from 30 to 400 K and RF pumping. The 2D-detector capabilities of COMET were recently upgraded by adding to the standard CCD camera two new detectors: a high repetition rate 2D CMOS and a double delay line MCP for time resolved experiments. The three detectors can be interchanged within minutes without breaking the vacuum. The distance between an individual detector and the sample can be varied over a wide range, allowing for a trade-off between pixel size and field of view in the image reconstruction. A reconstructed pixel size of the order of 10 nm has been achieved with the new COMET setup. We report also a comparison between holographic images of magnetic domains obtained for the same sample by using the CMOS and the CCD detectors