Dr Holger Schlarb (DESY)
Dr Pavel Evtushenko (HZDR / ELBE)
Dr Marcel Schuh (KIT - ANKA)
Prof. Andreas Jankowiak (HZB)
Mikhail Krasilnikov (DESY Zeuthen)
Dr Florian Burkart (DESY)
Dr Paul Goslawski (Helmholtz-Zentrum Berlin, HZB)
Giuliano Franchetti (GSI)
27. Emittance Reduction of RF Photoinjector Generated Electron Beams by Transverse Laser Beam Shaping
Dr Matthias Gross (DESY)
Linac based X-ray free electron laser demand a high beam quality from the electron source, therefore RF photoinjectors are used to generate the electron bunches for state of the art beam brightness. One important figure of merit for these injectors is the transverse emittance of the generated electron beam, which can be minimized by shaping the photocathode laser pulses. Best performance can...
Anusorn Lueangaramwong (Deutsches Elektronen-Synchrotron DESY, Platanenallee 6, 15738 Zeuthen, Germany)
A magnetic bunch compressor is a part of an accelerator-based THz source prototype for pump-probe experiments at the European XFEL at the Photo Injector Test Facility at DESY in Zeuthen (PITZ). We study the performance of the bunch compressor by beam dynamics simulations. However, a coherent radiation effect challenges our study case involving high space charge up to 2 nC, low energy beam of...
Mr Patrick Schreiber (KIT)
New operation modes are often considered during the development of new synchrotron light sources. An understanding of the instabilities involved is inevitable for a successful operation of these schemes. At the test facility KARA (Karlsruhe Research Accelerator), new modes can be implemented and tested employing a variety of performant beam diagnostics devices which allow the investigation of...
Mikhail Krasilnikov (DESY Zeuthen)
The Photo Injector Test Facility at DESY in Zeuthen (PITZ) develops a prototype of an accelerator based THz source for pump-probe experiments at the European XFEL. For the proof-of-principle experiments an LCLS-I undulator will be installed in a second PITZ tunnel downstream of the accelerator. Two LCLS-I undulators (on loan from SLAC) have arrived at Hamburg in August 2019. The fields of the...
Mr Arnold Kruschinski (Helmholtz-Zentrum Berlin)
Rising demand for high-power radiation sources has inspired the proposal of the Steady-State Microbunching mechanism. Its implementation will allow the generation of coherent radiation at a storage ring facility, creating a high peak power/high average power radiation source over a wide range of wavelengths up to the EUV range. A Proof-of-Principle experiment is conducted at the Metrology...
Stefan Funkner (KIT)
Dr Sergey Kovalev (Helmholtz Zentrum Dresden Rossendorf)
Dr Richard D'Arcy (DESY)
Dr Jan Timm (DESY)
The Trip Event Logger is a fault diagnosis tool to detect errors, inform the operators and trigger automatic supervisory actions. Further goals are to provide information for a fault tree and event tree analysis as well as a database of labeled faulty data sets for offline analysis. The tool is based on the C++ framework ChimeraTK Application Core. With this close interconnection to the...
Dr Dima El Khechen (KIT, Karlsruhe Institute of Technology)
The compact STorage ring for Accelerator Research and Technology (cSTART) is a project which aims to demonstrate the injection and storage of a laser wakefield accelerated (LWFA) beam. The project mainly consists of an injector, a transfer line and a storage ring. The plan is to have two injectors, one is the photo-injector FLUTE (Ferninfrarot Linac- und Test-Experiment) and the other one is...
Gregor Loisch (DESY Zeuthen)
Photoinjectors are the primary choice for high-brightness electron beam sources today. A key element of these is the photocathode. In applications that require high average currents, semiconductor photocathodes are usually used due to their high quantum efficiency. Contrary to metal cathodes, electrons are not just extracted from the surface of a semiconductor but photons of the photocathode...
Sonja Jaster-Merz (DESY)
A novel type of beam profile monitor called STRIDENAS, dedicated to the detection of low-charge electron beams, is currently being developed at DESY. It aims at bridging the gap between conventional multi-pC scintillating screens and single particle detectors from high energy physics. This is needed, for example, for studies on novel acceleration techniques at the ARES electron linac, such as...
Dr Michael Nasse (Karlsruhe Institute of Technology)
A status report of the split ring resonator experiment at FLUTE is given.
Mr Jan Marjanovic (DESY)
The latency of the controller is an important parameter to consider in digital feedback systems, for example in LLRF controller for normal conducting RF structures. Contributing to the total latency of the controller are also the ADC internal pipeline and the interface between the ADC and the FPGA. In this talk different ADCs with different interfaces are compared: a 125 MSPS ADC with an...
59. A Step Towards fs-Resolution Arrival-Time Measurements for Ultra-Low Charged Bunches in X-ray Free Electron Lasers
Mr Bernhard Scheible (Technische Hochschule Mittelhessen)
For future experiments at the European XFEL an ultra-low charge mode is foreseen. The tight requirements on the facility wide synchronization system are even more crucial in these experiments, while the conditions for the electro-optical bunch arrival time monitors become worse. In this talk the first step towards a sufficient improvement of the arrival-time measurement is presented....
Dr Sebastian Schulz (Deutsches Elektronen-Synchrotron)
Klaus Zenker (Helmholtz-Zentrum Dresden-Rossendorf)
A digital LLRF control has been implemented at the CW linac ELBE at Helmholtz-Zentrum Dresden-Rossendorf. The system is based on the MicroTCA.4 standard and drives four superconducting TESLA cavities and two normal conducting buncher cavities. The system enables a higher flexibility of the field control, improved diagnostics and field stability compared to the analogue system which was used...
Andrea Santamaria Garcia (KIT)
Mr Sajjad Hussain Mirza (GSI Darmstadt)
A fast and robust closed orbit feedback (COFB) system is realized at SIS18 synchrotron of GSI for the orbit correction during the acceleration cycles. ORM variation over the fast ramps due to the triplet-to-doublet quadrupole transition from injection to extraction posed a unique challenge for the stability of the feedback system. The theoretical investigations are presented made using control...
Mr Thorsten Lamb (DESY)
The Accelerator Research Experiment at SINBAD (ARES) is a conventional S-band linear accelerator which will be capable of producing ultra-short electron bunches with duration of a few femtoseconds and energy of up to 100 MeV. The SINBAD injector laser synchronization has recently been extended with with an advanced laser-to-RF phase detector, which is based on an integrated Mach-Zenhnder...
Uros Mavric (DESY)
The carrier suppression method offers a leap in terms of measured amplitude and phase resolution compared to other methods. The method allows overcoming the ADC noise barrier which can give resolution improvements of 30 dB compared to other methods. Our current work includes mostly finding the best technologies of various building blocks which should ultimately lead to a viable testing of a...
Mr Andrei Maalberg (Helmholtz-Zentrum Dresden-Rossendorf)
The design of a beam-based feedback control for the superconducting electron linear accelerator ELBE is progressing through its modelling stage. By taking into account the continuous-wave mode of this accelerator with its inherent steady-state RF operation we propose a disturbance rejection control scheme that takes the process disturbance explicitly into account. In particular, we analyze the...
Mr Maximilian Schütte (DESY)
The optical synchronization system for European XFEL provides few femtosecond ultra-stable timing synchronization for accelerator subsystems and experiments. It will be the first accelerator subsystem at EuXFEL to receive an extensive data acquisition system to capture all status and operation relevant system parameters available in the DOOCS control system for uninterrupted multi-year time...
Sven Stubbe (DESY)
Introduction of the next generation FMC/FMC+ carrier and IO controller AMC boards in MicroTCA
Mr Thiemo Schmelzer (Karlsruhe Intitute of Technology (KIT))
At the Ferninfrarot Linac und Test-Experiment (FLUTE) a regular operation with electron beam in the first section, up to 7 MeV, was achieved. For time resolved experiments the accelerating field amplitude and phase in the RF gun needs to be stable to better than 0.1%. At FLUTE a high influence of the 50 Hz AC-line power was observed and investigated. Utilizing the MRF timing distribution and...
Z. Andelkovic (GSI)
Sajjad Hussain Mirza (GSI)