Sub-femtosecond short and long-term stable timing reference signals for the LLRF systems, longitudinal beam diagnostics and experiment laser systems are the next milestone on the road towards more advanced few-femtosecond and attosecond resolved experiments at the latest generation of FELs such as FLASH (2020+) and European XFEL. Using a comprehensive model of the laser-based synchronization...
Using a novel RF receiver technique based on a carrier-suppression interferometer (CSI), we have achieved sub-femtosecond RF field control stability on a 1.3GHz CW superconducting RF (SRF) cavity at the Cryo-Module Test Bench (CMTB) at DESY. The CSI provides an improved RF sensitivity of a factor 100 and is used in addition to the standard RF down-converter. The CSI signal is added as an...
Tuning injectors is a challenging task for the operation of accelerator facilities and synchrotron light sources,
particularly during the commissioning phase. Efficient tuning of the transfer line is essential for ensuring
optimal beam transport and injection efficiency. This process is further complicated by challenges such as
beam misalignment in quadrupole magnets, which can degrade beam...
This talk reviews the DESY MicroTCA card, DAMC-DS5014DR, designed for high-speed multi-channel data acquisition. Based on AMD Zynq Ultrascale RFSoC ZU47DR, it features eight 14-bit, 5-GSPS ADCs, eight 14-bit, 10-GSPS DACs, extensive programmable logic (PL) resources, and an ARM-processing system (PS). In this card, the AC or DC coupling options ensure that the input signals are pre-conditioned...
This poster presents a master’s thesis which outlines a concept for the migration of the DESY II magnet control from the VMEbus standard to the MicroTCA standard. A special focus is placed on meeting the real-time requirements, which were achieved in the VME system by using the real-time operating system VxWorks.
The central concept is the system-on-chip (SoC) approach, whereby the control...
In the light of recent developments to employ high-Q superconducting cavities to reduce the energy consumption of particle accelerators, the problem of minimizing cavity detuning becomes highly relevant. Meanwhile, radio frequency cavities are known for their non-stationary behavior, so finding a proper modeling approach is crucial for any model-based detuning control. In this contribution, we...
At the European XFEL, the main beam dump serves to absorb all electron bunches that are not required for the downstream scientific experiments. Due to the large beam power of the accelerator, controlling the dump temperature is a crucial component in its operation. Currently, this is done in an open-loop feed-forward manner. However, due to unforeseen drifts and changes in the setup of the...
RFSoC has a number of advantages to reduce the costs associated with designing and debugging control algorithms for large and small research institutes: an adjustable PLL and multiple ADC/DACs capable of mixing frequencies and tuning the Nyquist operating zone and bandwidth, support for DSP algorithm developers and design tool vendors. Accelerated prototyping of the control system on RFSoC has...
The purpose of the MAGO (Microwave Apparatus for Gravitational-wave Observation) project is to detect high-frequency gravitational waves (GWs) using a superconducting radio-frequency (RF) cavity. The detection principle relies on heterodyne detection. MAGO cavity consists of two identical coupled cells. Coupling of the two cells, produce two close resonant modes(zero and pi mode). When the...
In low beam loading applications, operating SRF cavities with high loaded quality factors is currently one of the main efforts in order to reduce the electric power needed for particle acceleration. This reduction is a key factor for current and future facilities as it 1) decreases the initial invest (tube based amplifiers can be substituted by solid state amplifiers) and 2) reduces the plug...
The Laser Interferometer Space Antenna (LISA) mission is one of the most ambitious space observatories developed by the European Space Agency (ESA) in collaboration with the National Aeronautics and Space Administration (NASA). Its objective is to detect low-frequency gravitational waves—signals that are otherwise undetectable from Earth due to environmental noise. These waves, which propagate...
A new generation of normal conducting L-Band RF guns (Gun5) is under development at the Photo Injector Test facility at DESY in Zeuthen (PITZ), with the goal to provide a high-quality electron source for superconducting linac driven free-electron lasers like FLASH and European XFEL. In addition to the improved cell geometry and cooling concept implemented in the new design, which allow for...
