학술논문
X-ray beam diagnostics at the MID instrument of the European X-ray Free-Electron Laser Facility
Document Type
article
Author
Ulrike Boesenberg; Gabriele Ansaldi; Alexander Bartmann; Lewis Batchelor; Felix Brausse; Jörg Hallmann; Wonhyuk Jo; Chan Kim; Birthe Klein; Iker Lobato; Wei Lu; Johannes Möller; Ilia Petrov; Angel Rodriguez-Fernandez; Andreas Schmidt; Markus Scholz; Roman Shayduk; Konstantin Sukharnikov; Alexey Zozulya; Anders Madsen
Source
Journal of Synchrotron Radiation, Vol 31, Iss 3, Pp 596-604 (2024)
Subject
Language
English
ISSN
1600-5775
16005775
16005775
Abstract
The Materials Imaging and Dynamics (MID) instrument at the European X-ray Free-Electron Laser Facility (EuXFEL) is equipped with a multipurpose diagnostic end-station (DES) at the end of the instrument. The imager unit in DES is a key tool for aligning the beam to a standard trajectory and for adjusting optical elements such as focusing lenses or the split-and-delay line. Furthermore, the DES features a bent-diamond-crystal spectrometer to disperse the spectrum of the direct beam to a line detector. This enables pulse-resolved characterization of the EuXFEL spectrum to provide X-ray energy calibration, and the spectrometer is particularly useful in commissioning special modes of the accelerator. Together with diamond-based intensity monitors, the imager and spectrometer form the DES unit which also contains a heavy-duty beamstop at the end of the MID instrument. Here, we describe the setup in detail and provide exemplary beam diagnostic results.