1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Substrate material studies for PCB-based electro-optical bunch arrival-time monitors for XFELs

THPS107
5 Jun 2025, 15:30
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC6.T03 Beam Diagnostics and Instrumentation Thursday Poster Session

Speaker

Mr Bernhard Scheible (Technische Hochschule Mittelhessen)

Description

The all-optical synchronization system used in many X-ray free-electron laser facilities (XFELs) relies on electro-optical bunch arrival-time monitors (EO-BAM) for measuring the single bunch arrival-time with regards to an optical reference. An upgrade of the established EO-BAM is intended to achieve a sensitivity that enables stable operation with bunches down to charges of 1 pC or significantly increase the resolution in normal operation. Therefore, the pickup structure, the RF path and the electro-optical modulators are undergoing a fundamental redesign. The novel concept of the pickup structure comprises planar pickups on a printed circuit board (PCB) with integrated combination network and a bandwidth of up to 100 GHz. The theoretical jitter charge product of the preliminary concept has been estimated to be in the order of 9 fs pC and the concept was proven experimentally with a 67-GHz demonstrator at ELBE. In this contribution, we compare ceramic and glass substrates in terms of radiation hardness, sensitivity, and manufacturing capabilities. The achievable bandwidth and sensitivity are influenced by material losses and varying tolerances due to different fabrication methods.

Funding Agency

This work is supported by the German Federal Ministry of Education and Research (BMBF) under Contract No. 05K22RO2

Region represented Europe
Paper preparation format LaTeX

Author

Mr Bernhard Scheible (Technische Hochschule Mittelhessen)

Co-authors

Prof. Andreas Penirschke (Technische Hochschule Mittelhessen) Herbert De Gersem (Technical University of Darmstadt) Holger Schlarb (Deutsches Elektronen-Synchrotron DESY) Jan Roever (Deutsches Elektronen-Synchrotron DESY) Marie Kristin Czwalinna (Deutsches Elektronen-Synchrotron DESY) Michael Kuntzsch (Helmholtz-Zentrum Dresden-Rossendorf) Nisamol Nazer (Deutsches Elektronen-Synchrotron DESY) Wolfgang Ackermann (Technical University of Darmstadt)

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