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Diamond sensors for hard X‐ray energy and position resolving measurements at the European XFEL
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Journal Article
Diamond sensors for hard X‐ray energy and position resolving measurements at the European XFEL
2024
Overview
The diagnostics of X‐ray beam properties has a critical importance at the European X‐ray Free‐Electron Laser facility. Besides existing diagnostic components, utilization of a diamond sensor was proposed to achieve radiation‐hard, non‐invasive beam position and pulse energy measurements for hard X‐rays. In particular, with very hard X‐rays, diamond‐based sensors become a useful complement to gas‐based devices which lose sensitivity due to significantly reduced gas cross‐sections. The measurements presented in this work were performed with diamond sensors consisting of an electronic‐grade single‐crystal chemical‐vapor‐deposition diamond with position‐sensitive resistive electrodes in a duo‐lateral configuration. The results show that the diamond sensor delivers pulse‐resolved X‐ray beam position data at 2.25 MHz with an uncertainty of less than 1% of the beam size. To our knowledge this is the first demonstration of pulse‐resolved position measurements at the MHz rate using a transmissive diamond sensor at a free‐electron laser facility. It can therefore be a valuable tool for X‐ray free‐electron lasers, especially for high‐repetition‐rate machines, enabling applications such as beam‐based alignment and intra‐pulse‐train position feedback. Diamond sensors have been developed and tested for operation with high‐energy X‐ray beams at the European XFEL.
Publisher
International Union of Crystallography,John Wiley & Sons, Inc
