376 citations · 557 across the 13 of their papers we have counts for
14 papers
Ageing Analysis of Embedded SRAM on a Large-Scale Testbed Using Machine Learning
Leandro Lanzieri, Peter Kietzmann, Goerschwin Fey +2
Ageing detection and failure prediction are essential in many Internet of Things (IoT) deployments, which operate huge quantities of embedded devices unattended in the field for ye…
Learning to Do or Learning While Doing: Reinforcement Learning and Bayesian Optimisation for Online Continuous Tuning
Jan Kaiser, Chenran Xu, Annika Eichler +9
Online tuning of real-world plants is a complex optimisation problem that continues to require manual intervention by experienced human operators. Autonomous tuning is a rapidly ex…
A Review of Techniques for Ageing Detection and Monitoring on Embedded Systems
Leandro Lanzieri, Gianluca Martino, Goerschwin Fey +3
Embedded digital devices are progressively deployed in dependable or safety-critical systems. These devices undergo significant hardware ageing, particularly in harsh environments.…
RF regulation with superconducting cavities and beam operation using a frequency shifted cavity
Sven Pfeiffer, Valeri Ayvazyan, Julien Branlard +11
The free-electron laser FLASH at DESY and the European XFEL are operated with superconducting radio frequency cavities and supply beam to several user experiments. The switching ti…
Pickup concepts for ultra-low charged short bunches in X-Ray Free-Electron Lasers
Bernhard E. J. Scheible, Stefano Mattiello, Marie K. Czwalinna +4
The all-optical synchronization systems used in various X-ray free-electron lasers (XFEL) such as the European XFEL observe the transient fields of passing electron bunches coupled…
High-fidelity Prediction of Megapixel Longitudinal Phase-space Images of Electron Beams using Encoder-Decoder Neural Networks
Jun Zhu, Ye Chen, Frank Brinker +3
Modeling of large-scale research facilities is extremely challenging due to complex physical processes and engineering problems. Here, we adopt a data-driven approach to model the…
Clocking Auger Electrons
D. C. Haynes, M. Wurzer, A. Schletter +34
Intense X-ray free-electron lasers (XFELs) can rapidly excite matter, leaving it in inherently unstable states that decay on femtosecond timescales. As the relaxation occurs primar…
Real-Time Redundancy for the 1.3 GHz Master Oscillator of the European-XFEL
Bartosz Gąsowski, Tomasz Owczarek, Krzysztof Czuba +2
Many modern large-scale facilities, like European X-ray Free Electron Laser (E-XFEL), require precise synchronisation, often down to femtosecond level. Even a very short interrupti…
Phase Drift Compensating RF Link for Femtosecond Synchronization of E-XFEL
Dominik Sikora, Krzysztof Czuba, Pawel Jatczak +4
Modern high-energy particle accelerators and Free-Electron Lasers incorporate large quantities of sensitive RF and microwave frequency devices distributed over kilometer distances.…
Simulation of microphonic effects in high TESLA cavities during CW operations
A. Bellandi, W. Cichalewski, J. Branlard +4
This document describes a new package to compute high performance simulations of a module of superconducting accelerating cavities from the LLRF controller perspective. The reason…
The FLASHForward Facility at DESY
A. Aschikhin, C. Behrens, S. Bohlen +35
The FLASHForward project at DESY is a pioneering plasma-wakefield acceleration experiment that aims to produce, in a few centimetres of ionised hydrogen, beams with energy of order…
Laser Wire Scanner Compton Scattering Techniques for the Measurement of the Transverse Beam Size of Particle Beams at Future Linear Colliders
I. Agapov, K. Baleski, G. A. Blair +31
This archive summarizes a working paper and conference proceedings related to laser wire scanner development for the Future Linear Collider (FLC) in the years 2001 to 2006. In part…
High Bandwidth Pickup Design for Bunch Arrival-time Monitors for Free-Electron Laser
Aleksandar Angelovski, Alexander Kuhl, Matthias Hansli +7
In this paper, we present the design and realization of high bandwidth pickup electrodes with a cutoff frequency above 40 GHz. The proposed cone-shaped pickups are part of a bunch…
First Observation of Self-Amplified Spontaneous Emission in a Free-Electron Laser at 109 nm Wavelength
J. Andruszkow
We present the first observation of Self-Amplified Spontaneous Emission (SASE) in a free-electron laser (FEL) in the Vacuum Ultraviolet regime at 109 nm wavelength (11 eV). The obs…