3rd ARD ST3 workshop

15 Jul 2015, 12:00 → 17 Jul 2015, 15:30 Europe/Berlin

ANKA Seminar room, building 348 (KIT)

Anke-Susanne Müller, Holger Schlarb, Michael Gensch

The Helmholtz Initiative for Accelerator Research & Development (ARD) was established to strengthen development in accelerator physics and technology and to ensure international competitiveness. In this framework, accelerator scientists push the limits of today’s technology in a research network of six Helmholtz centers (Deutsches Elektronen-Synchrotron (DESY) in Hamburg and Zeuthen, Helmholtz Zentrum Dresden-Rossendorf (HZDR), Forschungszentrum Jülich (FZJ), Helmholtz Zentrum for Heavy Ion Research GSI in Darmstadt, Karlsruhe Insitute for Technology (KIT), and Helmholtz Zentrum Berlin for Materials and Energy (HZB) ), two Helmholtz institutes, eleven universities, two Max-Planck institutes, and the Max-Born institute. The third ARD topical workshop on “ps - fs Electron and Photon Beams” will focus on three fundamental areas of current research in the field of short pulse particle accelerators, namely research related to synchronization and seeding, ultra-fast pulse diagnostics, and photon radiation and interaction. The workshop aims to bring to together scientists from universities and Helmholtz centers that are involved in the subtopic 3 (ST3) “ps – fs Electron and Photon Beams” of the ARD program. It shall serve to further strengthen collaborative projects at and between the different accelerator facilities. The workshop shall also serve to educate young researchers and students participating in projects and experiments within ST3.

Bus transfer overview map Busbahnhof_KA.pdf

How to get to Restaurant Flammaurant Flammaurant.pdf

KIT Campus North Map How-to-get-_to-KIT-ANKA-hall-Seminarraum.pdf

Wednesday, 15 July

12:00 → 13:00 Arrival of Participants (Optional: Lunch at KIT canteen)

13:00 → 14:45 Session 1 | Facility Report and Overview

13:00 Welcome

Speaker: Anke-Susanne Mueller (KIT)

Slides 2015_ARD-ST3-Workshop-Organisation.pdf

13:05 Status of the KIT facilities

Speaker: Marcel Schuh (KIT)

Slides 2015-ARD-ST3WS-KIT_schuh_online.pdf

13:20 Status of the DESY facilities

Speaker: Dr Holger Schlarb (DESY)

Slides ARD_activies_DESY_Holger_Schlarb_20150715.pptx

13:45 Status of the HZDR facilities

Speaker: Dr Michael Gensch (DESY)

14:00 Status of PITZ

Speaker: Dr Mikhail Krasilnikov (DESY)

Slides PITZ_MK_4ARDST3_2015_2.pdf

14:15 Status of HZB facilities

Speakers: Bettina Kuske (HZB), Paul Goslawski (HZB)

Slides HZB_VSR_BPro.pdf

14:30 ATHENA_e and SINBAD

Speaker: Dr Barbara Marchetti (DESY)

Slides ST3.pdf

14:45 → 15:10 Coffee break

15:10 → 16:16 Session 2 | Beam Dynamics & Photon Sources

15:10 Talk 1: CSR & Beam Dynamics Simulations

Speaker: Peter Kuske (HZB)

Slides CSR_&_Beam_Dynamics_Simulations.pdf

15:25 Speed Poster: Experience from TDS Measurements at the SwissFEL Injector Test Facility

Transverse deflecting structures are a powerful tool in beam dynamics studies. These devices produce correlations between transverse and the longitudinal offset. Therefore "top-view" images of the beam can be taken. Measurements of longitudinal bunch profiles are relatively straight forward, while investigations of the longitudinal phase space or even the slice emittance are more involved. In this poster some experience from these kind of measurements done at the SwissFEL Injector Test Facility are presented.

Speaker: Dr Bolko Beutner (DESY)

Slides ard_slides.pptx

15:28 Speed Poster: Development of superconducting undulators at ANKA

Superconducting undulators (SCUs) have the potential to reach higher brilliance and flux with respect to the state of the art permanent magnet insertion devices. ANKA is collaborating with the industrial partner Babcock Noell GmbH (BNG) to realize NbTi conduction cooled planar devices for low emittance light sources, and is developing the instrumentation to characterize the magnetic field properties and to measure the beam heat load to a cold bore needed for the cryogenic design of SCUs. We present here: the most recent results obtained within the ANKA-BNG collaboration, the progress achieved in the development of the instrumentation, and the in house studies on the application of high temperature superconducting (HTS) tape to the SCU technology.

Speaker: Dr Sara Casalbuoni (ANKA-KIT)

Poster SCUs.pdf

Slides Talk_SCUs_ARDJuly2015.pdf

15:31 Speed Poster: AN INTRODUCTION TO THE SINBAD LINAC

SINBAD (Short Innovative Bunches and Accelerators at DESY) is a planned multi-purpose research and development facility at DESY. The SINBAD linac aims to produce low charge (0.2 - 50 pC), ultra-short (from few fs to sub-fs) and ultra-stable (arrival-time jitter less than 10 fs ) electron bunches with energies up to 200 MeV, which will be used for explorations in ultra-fast science as well as Laser-driven Plasma Wakefield Acceleration (LWFA) with external injection. The SINBAD linac will consist of a compact S-band normal-conducting photoinjector, where several compression schemes are going to be explored, e.g. velocity bunching and magnetic compression with a slit. A dogleg with variable R56 will also allow the implementation of the hybrid bunch compression scheme. In addition, an X-band linearizer is foreseen to be introduced in order to further improve the bunch compression.

Speaker: Mr Jun Zhu (DESY)

Slides An_Introduction_to_the_SINBAD_linac.pdf

15:34 Speed Poster: New photocathode laser system for 3D quasi-ellipsoidal pulses - first produced photoelectrons

The use of high brightness electron beams in Free Electron Laser (FEL) applications is of increasing importance. One of the most promising methods to generate such beams is the shaping of the photocathode laser pulses. It was already demonstrated that temporal and transverse flat-top laser pulses can produce very low emittance beams. Nevertheless, due to beam simulations further improvements can be achieved using quasi-ellipsoidal laser pulses, e.g. 30% reduction in transverse projected emittance at 1 nC bunch charge. In a collaboration between DESY, the Institute of Applied Physics (IAP) in Nizhny Novgorod and the Joint Institute of Nuclear Research (JINR) in Dubna such a laser system capable of producing trains of micropulses, where each micropulse has a quasi-ellipsoidal pulse shape, has been developed. The prototype of the system was recently installed at the Photo Injector Test facility at DESY in Zeuthen (PITZ) and is now in the commissioning phase. In this contribution comparison of beam dynamics simulations for different laser beam shapes, the overall setup as well as first experimental results of the new laser system will be presented.

Speaker: Dr Tino Rublack (DESY)

Slides ARD_slides.pdf

15:37 Speed Poster: Simulations of the IR/THz Options at PITZ (High-gain FEL and CTR)

The Photo Injector Test facility at DESY, Zeuthen site (PITZ), develops high brightness electron source for modern linac-based Free Electron Lasers (FELs). The PITZ accelerator can be considered as a proper machine for the development of an IR/THz source prototype for pump and probe experiments at the European XFEL. The radiation generated by high-gain FEL and Coherent Transition Radiation (CTR) have been considered and studied. Start-to-End simulations for a high-gain FEL and a CTR with electron beams produced by the PITZ accelerator have been performed. Since at PITZ the parallel operation of two photocathode laser systems capable of producing cylindrical and 3D-ellipsoidal laser pulses is foreseen, the simulations have been also done with these two different temporal laser profiles for comparison. The preliminary simulation results are presented and discussed in this contribution.

Speaker: Mr Prach Boonpornprasert (DESY, Zeuthen)

Poster Boonpornprasert_ARDST3Poster.pdf

Slides Boonpornprasert_ARDST3SpeedPoster.pdf

15:40 Speed Poster: Calculating the Electric Field of Coherent THz Pulses

Quick comparison of different methods.

Speaker: Dr Markus Schwarz (KIT)

Slides speed_schwarz_public.pdf

15:43 Speed Poster: Longitudinal Beam Dynamics at BESSY VSR

CBI thresholds and transient beam loading at BESSY VSR

Speaker: Dr Paul Goslawski (Helmholtz-Zentrum Berlin, HZB)

Poster VSRPoster_PG_ARDST3.pdf

Slides VSRPosterSlides_PG_ARDST3.pdf

15:46 Speed Poster: Linearization of the longitudinal phase space without higher harmonic field

Accelerator applications like free-electron lasers, time-resolved electron diffraction, and advanced accelerator concepts like plasma acceleration desire bunches of ever shorter longitudinal extent. However, apart from space charge repulsion, the internal bunch structure and its development along the beamline can limit the achievable compression due to non-linear phase space correlations. In order to improve such a limited longitudinal focus, a correction by properly linearizing the phase space is required. At large scale facilities like FLASH at DESY or the European XFEL a higher harmonics cavity is installed for this purpose. In this poster we present a new method -- based on ballistic bunching: Expanding the beam after the electron source enables a higher order correction of the longitudinal focus by a subsequent accelerating cavity which is operated at the same frequency as the electron gun. An analytic model describing this approach has been developed, which is verified by simulations, predicting possible bunch length below 1 fs at low bunch charge. Minimizing the energy spread down to dE/E < 10^-5 while keeping the bunch long is another interesting possibility, which finds applications e.g. in time resolved transmission electron microscopy concepts.

Speaker: Mr Benno Zeitler (Center for Free-Electron Laser Science & Department of Physics, University of Hamburg)

Slides 20150715_ARD-WS_KIT_SpeedPoster.pdf

15:49 Speed Poster: BEAM DYNAMICS OF LOW CHARGE ELECTRON BUNCHES FOR SINGLE SPIKE RADIATION AT FLASH

This poster discusses the generation of single spike SASE pulses at soft x-ray wavelength at the free-electron laser FLASH by using electron bunches of a few femtosecond duration. In order to achieve these extremely short bunch lengths, a low bunch charge of about 20pC is required. An injector laser with an adjustable pulse duration within the range of 1.7ps to 4ps FWHM and bunch charges up to 200pC is used for this special operation mode. Beam dynamic studies have been performed to optimize the injection and compression of low-charge electron bunches by controlling the effect of coherent synchrotron radiation and space-charge induced bunch lengthening and emittance growth. Optimization includes the pulse parameters of the injector laser.

Speaker: Dr Bernd Steffen (DESY)

Slides ARD_workshop_SPP.pdf

15:52 Speed Poster: Short Pulses at bERLinPro

Simulations of bunch compression at bERLinPro in two stages are presented, optimization algorithm for space charge dominated injector section is explained.

Speaker: Mr Andreas Ginter (HZB)

Poster 2015_ARD_KIT_Poster_hoch.pdf

Slides 2015_ARD_KIT_Speed_Poster_Andreas_Ginter.pdf

15:55 Speed Poster: Microbunching Simulations

Speaker: Patrik Schönfeldt (KIT)

Slides 2015-07-15_ARD_Inovesa-Talk.pdf

15:58 Speed Poster: Studies of THz Radiation in the Bursting Regime at ANKA

Speakers: Mr Johannes Steinmann (Karlsruhe Institute of Technology (KIT), ANKA), Miriam Brosi (KIT)

Slides ARD2015_Steinmann-Brosi.pdf

16:01 Speed Poster: Realizing All-Optical Free-Electron Lasers with Traveling-Wave Thomson-Scattering

We show how all-optical free-electron lasers (OFELs) from EUV to the X-ray range can be realized using existing high-power lasers and electron accelerators.

Speaker: Dr Alexander Debus (HZDR)

Slides 2015-07-15_TWTS-OFEL_Alexander_Debus.pptx

16:04 Speed Poster: FEL Lasing Suppression by a Seeded Microbunching Instability

Collective effects and instabilities due to longitudinal space charge and coherent synchrotron radiation can degrade the quality of the ultra-relativistic, high-brilliance electron bunches needed for the operation of free-electron lasers. In this contribution, we demonstrate the application of a laser-induced microbunching instability to selectively suppress the SASE process. A significant decrease of photon pulse energies was observed at the free-electron laser FLASH in coincidence with overlap of 800 nm laser pulses and electron bunches within a modulator located approximately 40 meters upstream of the undulators. We discuss the underlying mechanisms based on longitudinal space charge amplification [E.A. Schneidmiller and M.V. Yurkov, Phys. Rev. ST Accel. Beams 13, 110701 (2010)] and present measurements.

Speaker: Dr Jörn Bödewadt (DESY)

Poster FEL Lasing Suppression (Protected)

Slides SpeedPoster Slides

16:07 Speed Poster: Seeding experiment at FLASH

The free-electron laser facility FLASH at DESY operates since several years in SASE mode, delivering high-intensity FEL pulses in the extreme ultraviolet and soft x-ray wavelength range for users. In order to get more control of the characteristics of the FEL pulses, external FEL seeding has proven to be a reliable method to do so. At FLASH, an experimental setup to test several different external seeding methods has been installed since 2010. After successful demonstration of direct seeding at 38 nm, the setup is now being operated in HGHG and later in EEHGmode. Furthermore, other studies on laser-induced effects on the electron beam dynamics have been performed. In this contribution, we give an overview of recent experimental results on FEL seeding at FLASH.

Speaker: Dr Jörn Bödewadt (Hamburg Universtiy)

Poster Seeding experiment at FLASH

Slides Speedposter slides

16:10 Speed Poster: Very Large Acceptance compact Storage Ring to study ultra-short pulses of electron beam with wide momentum spread

The Very Large Acceptance compact Storage Ring project (VLA cSR) is an organic part of the Helmholtz Association Accelerator Research and Development (ARD) program foreseeing a “Helmholtz distributed ARD Test Facility” ATHENA (“Accelerator Technology HElmholtz iNfrAstructure”). Research and developments on laser plasma acceleration are pursued with high priority in frame of German national ARD activities and shall clear up key issues on the feasibility of new generation of very compact, cost-effective accelerators and sources of Synchrotron radiation for present and future users. The proposed test ring shall clear up some open questions on possibility of storage of ultra-short bunches in a femtosecond pulse scale injected after laser wake-field accelerators. Also study of stability conditions of large momentum spread electron beams is foreseen in future ring experiments. The FLUTE THz Facility at Karlsruhe Institute of Technology (KIT) will provide steady and reliable injection of ultra-short pulses of electrons into proposed VLA ring. The chosen energy range (50 to 500 MeV) would allow to distinguish short term betatron oscillations in a nanosecond time scale as well as synchrotron motion (millisecond time scale) from synchrotron radiation damping effects which are very slow (tens of seconds) at 50 MeV

Speaker: Dr Alexander PAPASH (Karlsruhe Institute of Technology)

Slides ARD-ST3_VLA_SR_3slides.pdf

16:13 Superradiant Undulator Radiation

Speaker: Mr Bertram Green (HZDR)

Slides suraund.pptx

16:16 → 18:00 Poster Session: Beam Dynamics & Photon Sources & Coffee Break

18:15 → 18:45 Transfer to Karlsruhe

19:00 → 21:00 Workshop Dinner

http://badische-weinstuben.de

Thursday, 16 July

08:15 → 09:00 Transfer to KIT

09:00 → 10:30 Tutorial 1: CSR- & Radiation-Beam Interaction

09:00 CSR- & Radiation-Beam Interaction

Speaker: Martin Dohlus (DESY)

Executable Radiation2D.exe

Slides CSR_tutorial.pdf CSR_tutorial_with_L.pdf

10:30 → 11:00 Coffee Break

11:00 → 12:12 Session 3 | Beam Diagnostics

11:00 Talk 1: High Rep Rate Pulse-to-Pulse Analysis at TELBE

Speaker: Dr Michael Gensch (DESY)

11:15 Talk 2: Beam Diagnostics for FELs

Speaker: Volker Schlott (PSI)

11:30 Speed Poster: Picosecond YBCO detection system for Coherent Synchrotron Radiation

Terahertz detectors Single-shot CSR diagnostics 65 GHz readout High-temperature superconductors

Speaker: Juliane Raasch (KIT, IMS)

Slides Raasch.pdf

11:33 Speed Poster: Single-shot terahertz spectroscopy with picosecond time resolution

terahertz detectors narrow-band antenna array ultra-fast cryogenic detectors superconductors

Speaker: Alexander Schmid (KIT, IMS)

Slides Schmid_Speedpraesentation_ARD_ST3_final1.pdf

11:36 Speed Poster: Integrated Spectrometer for Electron Bunch Shape Online-Diagnosis

We present the latest measurement results of our 300 GHz detector chip manufactured in a modern low-cost semiconductor technology. The detector works without any cooling and was capable of tracking the picosecond-pulses of the TELBE THz source at HZDR with a high dynamic range.

Speaker: Mario Schiselski (TU Dresden)

Slides KIT_Teaser_Schiselski.pptx

11:39 Speed Poster: High-speed readout system based on GPUDirect tecnology

A growing number of physics experiments requires DAQ systems with multi-Gbytes/s data-links. We developed a Direct Memory Access(DMA) engine compatible with the Xilinx PCI Express Gen2/3 core. Preliminary measurements with a Gen3 single-core have reached a throughput of up to 6.7 GBytes/s. We also intend to use this technology for direct communication between FPGA-based DAQ electronics and GPU memories (e.g. NVIDIA GPU-direct). This architecture finds its application in real-time DAQ systems and in low and high-level triggers for HEP experiments.

Speaker: Dr Michele Caselle (KIT)

Slides Caselle_ARD_talk.pdf

11:42 Speed Poster: Longitudinal bunch profile diagnostics using broadband coherent radiation at FLASH

The required high peak current in free-electron lasers is realized by longitudinal compression of the electron bunches to sub-picosecond length. Measurement of the absolute spectral intensity of coherent radiation emitted by an electron bunch allows monitoring and reconstruction of the longitudinal bunch profile. In this poster we present the current status and development of the coherent radiation diagnostics at the Free-electron laser in Hamburg.

Speaker: Mr Eugen Hass (DESY Hamburg)

Slides Speedposter

11:45 Speed Poster: Fast detector readout with MicroTCA.4

The poster presents an ultra-fast linear camera designed for use in high-energy physics experiments. The device will be presented in context of building the spectrometer for longitudinal beam charge profiling utilizing the electo-optic effect.

Speaker: Mr Aleksander Mielczarek (Lodz University of Technology)

Slides MIELCZAREK.pdf

11:48 Speed Poster: Broadband (UV - mid-IR) spectrometer for single-shot femtosecond electron bunch measurement

We present design, implementation and calibration of an ultra-broadband, single-shot spectrometer in the range of 200nm to 12μm for measuring coherent transition radiation of ultrashort electron pulses from laser-wakefield accelerators on femtosecond and sub-femtosecond time scales

Speaker: Mr Omid Zarini (Helmholtz-Zentrum Dresden - Rossendorf)

Slides Omid_Zarini_ARD3_presentation_(CTR-spectrometer).pdf

11:51 Speed Poster: Application of the low energy electron beam for the relativistic bunch length measurements

Measurement of the bunch length using low energy electron beam is introduced. Experimental results from the collider VEPP-4 are presented. Possibility for sub ps bunch length measurements are discussed.

Speaker: Dr Dmitriy Malyutin (HZB)

Slides short_malyutin.pdf

11:54 Speed Poster: Increasing the repetition rate of electro-optic sampling setups using the photonic time-stretch strategy: results at SOLEIL and ANKA

Single-shot ultrafast diagnostics at high repetition rate present challenging problems, due to the speed limitation of data acquisition setups. This concerns in particular the cameras which are typically required in electro-optic sampling and transient reflectivity setups. Here we explore an alternate way based on the so-called photonic time-stretch strategy, and which consists in "slowing-down" the signals by optical means before recording. We present a set of results using this strategy in the case of electro-optic sampling of THz pulses at SOLEIL [1], and electro-optic sampling of the electron bunch near-field at ANKA [2,3]. In particular we show how this type of experiment can provide a direct observation (turn-by-turn) of electron bunch structures created by the microbunching instability in storage rings. [1] E. Roussel et al., observing microscopic structures of a relativistic object using a time-stretch strategy, Scientific Reports 5, 10330 (2015). doi:10.1038/srep10330. [2] N. Hiller et al. ``Electro-Optical Bunch Length measurements at the ANKA Storage Ring'', MOPME014, Proc. IPAC'13, Shanghai, China (2013). [3] N. Hiller et al. "Single-Shot Electro-Optical Diagnostics at the ANKA Storage Ring”, MOPD17, Proc. IBIC’14, Monterey, CA, USA (2014)

Speaker: Prof. Serge Bielawski (PhLAM, Université Lille 1 (France))

Slides talk.pdf

11:57 Speed Poster: The compact Yb-fiber laser for electro-optical bunch detection at PSI/DESY/KIT

The poster gives an overview of the compact electro-optical bunch length measurement system developed for the SwissFEL and the changes and ubgrades for the E-XFEL at DESY and Flute at KIT.

Speaker: Dr Bernd Steffen (DESY)

Slides compactEOD_ARDWS_KIT_0715_slides.pdf

12:00 Speed Poster: Status of the Ultra-Fast 1D Detector Development

Speaker: Lorenzo Rota (KIT)

Slides slides_speedposter.pdf

12:03 Speed Poster: Online diagnostics of time-resolved electron beam parameters with TDS at the European XFEL

Transverse deflecting structure, online diagnostics, slice emittance, projected emittance, current profile, longitudinal phase space.

Speaker: Minjie Yan (DESY)

Slides 2015-7-15_KIT_workshop_shortPresentation.pdf

12:06 Speed Poster: Femtosecond bunch length measurement using a TDS and magnetic spectrometer

Speaker: Bennie Smit (KIT)

Slides Talk_ARD_ST3_20150714.pdf

12:09 High Repetition Rate Arrival Time Monitor

Speaker: Mr Bertram Green (HZDR)

12:12 → 13:15 Lunch Break

13:15 → 15:00 Poster Session: Beam Diagnostics

15:00 → 16:18 Session 4 | Stability, Controls & Synchronization

15:00 Talk 1: Beam Arrival Time Monitoring at CW Accelerators

Speaker: Michael Kuntzsch (HZDR)

Slides ARD_ST3_2015_Workshop_Talk_Kuntzsch_final.pdf

15:15 Talk 2: Latest LLRF Developments

Speaker: Mr Sven Pfeiffer (DESY)

Slides 02_SPfeiffer_ARD_KIT_LLRF_V1.pptx

15:30 Talk 3: Sub-fs Optical Synchronisation

Speaker: Kemal Shafak (CFEL)

Slides 20150716_Kemal_Shafak_ARD_ST3_v2.pptx

15:45 Speed Poster: Laser-to-RF conversion for Ti:Sa. Lasers

New Optical-to-Microwave Synchronization system for Titanium Sapphire Lasers.

Speaker: Mr Mikheil Titberidze (UHH/DESY-MSK/CFEL)

Poster PosterARD_workshop_Titberidze.pptx

Slides Speed_Poster_Titberidze.pdf

15:48 Speed Poster: Improved beam-based method for RF photo gun stability measurements

Stable and reliable operation of a high brightness photo injector is one of main challenges for the electron source of modern linac based Free Electron Lasers (FELs). The Photo Injector Test facility at DESY in Zeuthen (PITZ) develops high brightness photo injector for FLASH and the European XFEL. RF photo gun stability and reliability is in the focus of experimental program at PITZ. In November 2014 a new uTCA based LLRF system has been implemented at PITZ. This implies possibility to improve the stability of the gun phase and amplitude. Another important factor for the stable operation is a precise control of the gun cavity temperature. Several improvements have recently been implemented in the gun water cooling system (WCS). A method to estimate the RF gun stability based on electron beam measurements has been improved, adjusted to PITZ conditions and applied to monitor the stability of the photo injector. Besides the rms RF gun phase jitter it delivers also photocathode laser pulse energy fluctuations as well as estimations on electronic noise of the used measuring device. Results of these measurements for various regimes of the gun WCS and LLRF settings will be presented in comparison to direct uTCA measurements.

Speaker: Dr Mikhail Krasilnikov (DESY)

Slides MK_ARDST3_SpeedPoster.pdf

15:51 Speed Poster: New Bunch Arrival Time Monitor for FLASH and XFEL

bunch arrival time, timing stability, electro-optical detection scheme, synchronised ultra-short laser pulses, bunch sub-trains

Speaker: Mr Hannes Dinter (DESY)

Slides BAM-overview_shorted.pdf

15:54 Speed Poster: MicroTCA.4 Piezo Driver "DRTM-PZT4" and its applications

MicroTCA.4 Piezo Driver "DRTM-PZT4" has been developed to support laser synchronization and special diagnostic (SD) applications foreseen for XFEL facility. The Piezo Driver is capable of driving 4 piezo actuators with voltages up to ±80 V. The solid state power amplifiers are driven using 18-bit DACs and sampling rates of 1 MSPS. The bandwidth of the driver is remotely tuneable using programmable low pass filters. The DRTM-PZT4 unit provides the information of piezo output voltage and current. Two independent test setups have been built to test 4-channel Piezo Driver performance. In the paper we are presenting EOD laser lock to 1.3 GHz FLASH master oscillator using bipolar piezo stretcher (fine tuning). The piezo motor based course tuning has been applied for the long term laser stability measurements. The preliminary results of active stabilization of 3.6 km fibre link laboratory setup are shown.

Speaker: Dr Konrad Przygoda (DESY)

Poster KIT_POSTER_KP.pdf

Slides New Slides

15:57 Speed Poster: CW Laser Based Phase Reference Distribution for Particle Accelerators

We present a cost-effective solution for the synchronization of RF signal sources separated by tens of kilometers with the femtosecond accuracy. The system is comprised of an optical transmitter connected via single mode fibers to remote receivers. The transmitter is a CW laser intensity modulated by the RF reference oscillator.

Speaker: Mr Szymon Jablonski (Warsaw University of Technology)

Poster Poster_-_CW_Laser_Based_Phase_Reference_Distribution_for_Particle_Accelerators.pdf

Slides Slides_-_CW_Laser_Based_Phase_Reference_Distribution_for_Particle_Accelerators.pdf

16:00 Speed Poster: Generic Local Oscillator Modules

Generic Local Oscillator Modules

Speaker: Dr Matthias Hoffmann (DESY)

Poster ARD-Workshop_-_Generic_Local_Oscillator_Module.pdf

Slides ARD-Workshop_-_Generic_Local_Oscillator_Module_-_speed_poster_slides.pdf

16:03 Speed Poster: LLRF stability investigations at REGAE

LLRF stability investigations at REGAE

Speaker: Matthias Hoffmann (DESY)

Poster ARD-Workshop_-_LLRF_Stability_Investigations_at_REGAE.pdf

Slides ARD-Workshop_-_LLRF_Stability_Investigations_at_REGAE_-_speed_poster_slides.pdf

16:06 Speed Poster: Module for compensating environmental influences for CW field detection on fs scale

Accelerator RF control, drift compensation, CW operation

Speaker: Uros Mavric (DESY)

Slides Presentation.pptx slides.pptx

16:09 Speed Poster: Femtosecond Timing Distribution at the European XFEL

Accurate timing synchronization on the femtosecond timescale is an essential installation for time-resolved experiments at free-electron lasers (FELs) such as FLASH and the upcoming European XFEL. To date the required precision levels can only be achieved by a laser-based synchronization system. Such a system has been successfully deployed at FLASH and is based on the distribution of femtosecond laser pulses over actively stabilized optical fibers. For time-resolved experiments and for special diagnostics it is crucial to synchronize various laser systems to the electron beam with a long-term stability of better than 10fs. The upcoming European XFEL has raised the demands due to its large number of stabilized optical fibers and a length of 3400m. Specifically the increased lengths for the stabilized fibers had necessitated major advancement in precision to achieve the requirement of less than 10fs precision. This extensive rework of the active fiber stabilization has led to a system exceeding the current existing requirements and is even prepared for increasing demands in the future.

Speaker: Mr Cezary Sydlo (DESY)

Slides Femtosecond_timing_distribution_at_the_Eu-XFEL.pdf

16:12 Speed Poster: Latest developments of MTCA.4-based LLRF for ELBE

The poster presents latest developments of MTCA.4-based LLRF for ELBE including a real-time beam loading compensation using toroid detectors. Results of field-detection module measurements are discussed.

Speaker: Mr Igor Rutkowski (ISE, Warsaw University of Technology)

Slides speed_poster_presentation.pdf

16:15 Speed Poster: µTCA4ELBE - Integration of µTCA.4 into the ELBE Control System

ELBE is a superconducting linear electron accelerator at Helmholtz-Center Dresden-Rossendorf. The poster shows an integration concept of µTCA.4 hardware into the ELBE control system and its status. The idea is to use an OPC UA server running on the µTCA controller to publish control and status data of the hardware. The server implementation would be based on the µTCA4U control system adapter currently under development at DESY Hamburg.

Speaker: Reinhard Steinbrück (HZDR)

Slides µTCA4ELBE Speed Poster Slides

16:18 → 18:00 Poster Session: Stability, Controls & Synchronization & Coffee Break

Slides ARD_Poster_session_20150716t1500_final.pdf

18:00 → 18:30 Transfer to Karlsruhe

19:00 → 21:00 Informal Dinner

Friday, 17 July

08:15 → 09:00 Transfer to KIT

09:00 → 10:30 Tutorial 2: Electromagnetic Compatibility (EMC), Distortion and Noise Reduction

09:00 Electromagnetic Compatibility (EMC), Distortion and Noise Reduction

Speaker: Dr Frank Ludwig (DESY)

Slides EMC_Tutorial_ARD_KIT_17_07_15_FLudwig_V1__final.pptx

10:30 → 11:00 Coffee Break

11:00 → 12:00 Session 5 | Closing Session

12:00 → 13:00 Optional: Lunch

13:00 → 15:00 Tour: ANKA | FLUTE | KMNF | Detector-Lab

15:00 → 15:30 Transfer to Karlsruhe