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Due to its scale and tight specifications, the European XFEL poses real challenges in the field of low-level radio-frequency (LLRF) control. The implementation of this semi-distributed control system on the microTCA for physics (MTCA.4) platform triggered numerous designs of electronic boards and helped refine the usage of MTCA.4 technology for physics and control systems. This paper presents an overview...
Pulsed operation of high gradient superconducting radio frequency (SCRF) cavities results in dynamic Lorentz force detuning (LFD) approaching or exceeding the bandwidth of the cavity of order of a few hundreds of Hz. The resulting modulation of the resonance frequency of the cavity is leading to a perturbation of the amplitude and phase of the accelerating field, which can be controlled only at the...
Together with development of semiconductor technology the digital circuits are more and more susceptible to Single Event Upsets that changes information stored in memory components in non-predictible way. This is particularly important for circuits operating in radioactive environment but becomes also an important factor limiting reliability for circuits operating at normal conditions. The countermeasure...
The paper presents the methodology of design of ATCA based LLRF system for XFEL linear accelerators. The LLRF system is used to control RF field in superconducting accelerating cavities regulating amplitude up to 0.03% and phase up to 0.03 deg. It is complex mixed analogue-digital control with latency of order of few tens of nanoseconds. The ATCA architecture was chosen due to high availability and...
The RF Control for the European XFEL requires powerful data processing capability for many algorithms including feedback, calibration, diagnostics and low and high level applications needed for field control. While central processing architecture will be easier to manage and develop, it will also increase the requirements for the communication links connecting the boards. On the other hand, a distributed...
<para> Bremsstrahlung gamma radiation and photoneutrons are predominantly produced during the operation of high-energy electron linear accelerators. Therefore, generated radiation could cause radiation damage of electronic devices installed in the accelerator tunnel. A real-time radiation monitoring system RadMon has been designed to monitor both types of radiation at crucial spots inside a...
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