Dr
Ji-Gwang Hwang
(Helmholtz-Zentrum Berlin)
16/10/2019, 15:30
BESSY VSR is an upgrade project of the existing storage ring BESSY II to create long and short photon pulses simultaneously for all beamlines by installing superconducting cavities with harmonic frequencies of 1.5 GHz and 1.75 GHz. The storage-ring operation will be influenced by a transient beam-loading effect of all cavities in accordance with a complex filling pattern. This calls for bunch...
Mr
Min Chen
(Helmholtz - Zentrum Dresden - Rossendorf)
16/10/2019, 15:45
In this work we demonstrate an approach of double arrival time monitors (ATM), which is employed to increase synchronization level between external femtosecond laser systems and 4th generation light sources. With comparison to the single arrival time monitor technique, which was routinely used for time-resolved experiments at accelerator-based light sources, here we demonstrate more than twice...
Dr
Pavel Evtushenko
(HZDR / ELBE)
16/10/2019, 16:00
Dr
Shahab Sanjari
(GSI Darmstadt)
16/10/2019, 16:15
Dr
Marie Kristin Czwalinna
(DESY)
16/10/2019, 16:30
Speed talks: Diagnostics
Free electron laser facilities, such as the European XFEL and FLASH, have increasingly high demands on the temporal stability of the electron bunches, as pump-probe experiments meanwhile aim for timing stabilities of few femtoseconds residual jitter only.
For a beambased feedback control of the linear accelerator, bunch arrival-time monitors are required that are capable of reaching...
Sonja Jaster-Merz
(DESY)
16/10/2019, 16:33
Speed talks: Diagnostics
Novel accelerator techniques such as dielectric laser acceleration (DLA) will be studied at the SINBAD facility (DESY Hamburg) using the ARES linac. Due to the low charge of the accelerated beams, charge densities below 1 aC per square micron are expected at the spectrometer screen, which are challenging to measure with conventional techniques used in multi-pC accelerators. Therefore, a...
Marten Koopmans
(HZB)
16/10/2019, 16:37
Speed talks: Diagnostics
With the VSR upgrade for the BESSY II electron-storage ring bunch resolved diagnostics are required for machine commissioning and to ensure the long-term quality and stability of operation. For bunch-length measurements a dedicated beamline equipped with a fast streak camera was set up and successfully commissioned. The beamline is also capable of direct beam-profile imaging and interferometry...
Mr
Benjamin Kehrer
(Karlsruhe Institute of Technology)
16/10/2019, 16:40
Speed talks: Diagnostics
At the Karlsruhe Research Accelerator (KARA), the micro-bunching instability is investigated during regular low-alpha runs. Therefore, several diagnostics setups are used for time-resolved and synchronous measurements of the different bunch parameters with the long-term goal to reconstruct the longitudinal phase space. This allows to study the CSR intensity, the bunch length and the horizontal...
Mr
Thiemo Schmelzer
(Karlsruhe Intitute of Technology (KIT))
16/10/2019, 16:43
Speed talks: Diagnostics
The low energy section of FLUTE (Ferninfrarot Linac- Und Test-Experiment), a compact versatile linear accelerator under construction at the Karlsruhe Institute of Technology (KIT), is currently being commissioned. For the characterization of the electron beam different diagnostics tools are available, such as profile monitors and an energy spectrometer. The electron beam is produced in the...
Mr
Bernhard Scheible
(Technische Hochschule Mittelhessen)
16/10/2019, 16:46
Speed talks: Diagnostics
Numerous advanced applications of X-ray free-electron lasers require pulse durations and time resolutions in the order of only a few femtoseconds or better. The generation of these pulses to be used in time-resolved experiments require synchronization techniques that can simultaneously lock all necessary components to a precision in the range of 1fs only. To improve the experimental conditions...
Mr
Matthias Reukauff
(DESY)
16/10/2019, 16:49
Speed talks: Diagnostics
A collaboration between DESY, PSI and CERN has been established to develop and build an advanced modular X-band transverse deflection structure (TDS) system with the new feature of providing variable polarization of the deflecting force. The RF design of such structure, named Polarizable X-band (PolariX) TDS, has been done at CERN, while the fabrication took place at PSI, following the...
Mr
Matthias Reukauff
(DESY)
16/10/2019, 16:52
Speed talks: Diagnostics
The new PolariX TDS and its tomographic capabilities will be used in FLASH2, FLASHForward and SINBAD and shall provide a new level of beam diagnostics. It is developed in cooperation between DESY, PSI and CERN and requires X-band RF front-ends for the measurement of the 12 GHz electric fields. The cavity, waveguide and klystron signals will be down-converted from 12 GHz to 3 GHz and further...
Mr
Raffael Niemczyk
(PhD Student)
16/10/2019, 16:55
Speed talks: Diagnostics
At the Photo Injector Test Facility at DESY in Zeuthen (PITZ) photoelectron guns are conditioned and optimized for free-electron laser (FEL) facilities. In order to achieve a high lasing performance an electron beam with low transverse emittance and high current is required. Measurements of the slice emittance are necessary to determine both properties. At PITZ, transverse emittance...
Mr
Georgi Georgiev
(DESY Zeuthen)
16/10/2019, 16:58
Speed talks: Diagnostics
There are ongoing beam coupling studies at the Photo Injector Test facility at DESY in Zeuthen (PITZ). Electron beam asymetries have been observed and gun quadrupoles are installed to correct them. A 4-dimensional phase space characterization is required to understand the asymmetries in detail. A novel technique for 4-dimensional transverse beam phase space measurement is developed at PITZ....
Dr
Vera Chetvertkova
(GSI)
17/10/2019, 09:20
SIS100 is the main accelerator of the FAIR-facility that will provide high-energy high-intensity ions and protons further down to the experiments and production targets. One of the challenges of its operation is the large beam size compared to the physical aperture. This presentation will cover the different beam loss mechanisms in SIS100: resonance crossing due to magnet field errors and...
Miriam Brosi
(KIT)
17/10/2019, 09:40
Dr
Xiangkun LI
(DESY Zeuthen)
17/10/2019, 10:00
Speed talks: Beam Dynamics
A proof-of-principle experiment for a THz SASE FEL is undergoing preparation at the Photo Injector Test facility at DESY in Zeuthen (PITZ), as a prototype THz source for pump-probe experiments at the European XFEL, which could potentially provide up to mJ/pulse THz radiation while maintaining the identical pulse train structure as the XFEL pulses. One key design is to obtain a peak current of...
Mr
Patrick Schreiber
(KIT)
17/10/2019, 10:02
Speed talks: Beam Dynamics
For future synchrotron light sources different acceleration modes are of interest including operation with negative momentum compaction.
The Karlsruhe Research Accelerator (KARA) is an accelerator test facility that enables the implementation of a wide variety of operation schemes. This possibility is utilised by testing optics with a negative momentum compaction factor at KARA. Studies of...
Mr
Thiemo Schmelzer
(Karlsruhe Intitute of Technology (KIT))
17/10/2019, 10:06
Speed talks: Beam Dynamics
FLUTE (Ferninfrarot Linac- Und Test-Experiment) is a compact versatile linear accelerator under construction at the Karlsruhe Institute of Technology (KIT). It serves as a platform for a variety of accelerator studies and will generate strong THz pulses for photon science. In the 7 MeV injector section, currently under commissioning, the first experiment is being set up, the Split Ring...
Dr
Xiangkun LI
(DESY Zeuthen)
17/10/2019, 10:45
Poster: Beam Dynamics
A continuous wave (CW) mode operation of the European XFEL is under studies for a future upgrade. A superconducting RF (SRF) CW gun is under experimental development at DESY in Hamburg. Beam dynamics simulations for this setup have been done assuming 100 pC bunch charge and a maximum electric field at the photocathode of 30-40 MV/m. Experimental studies for these parameters using a normal...
Carsten Mai
(DELTA - TU Dortmund)
17/10/2019, 10:45
Poster: Beam Dynamics
At DELTA, a 1.5-GeV electron storage ring operated as a synchrotron light source by the TU Dortmund University, a dedicated beamline is used for experiments with (sub-)THz radiation. Here, an interaction of short laser pulses with electron bunches gives rise to coherently emitted broadband as well as tunable narrowband radiation from 75 GHz to 5.6 THz. For the narrowband operation of the...
Dr
Florian Burkart
(DESY)
17/10/2019, 10:45
Poster: Beam Dynamics
The ARES linac (Accelerator Research Experiment at DESY) setup hosts a normal conducting RF photoinjector generating a low charge electron beam that is afterwards accelerated by an S-band linac section. The linac as well as a magnetic chicane allow the production of ultrashort pulses with an excellent arrival-time stability.
The electron beam has then the potential to serve as a test beam...
Mr
Stephan Kötter
(Zentrum für Synchrotronstrahlung (DELTA), TU Dortmund University)
17/10/2019, 10:47
Poster: Beam Dynamics
At DELTA, a 1.5-GeV electron storage ring operated by the TU Dortmund University, preliminary tests of an online orbit-response-matrix model were conducted. Closed orbit perturbations corrected by the slow orbit feedback can be buffered and used to update a fit of the bilinear-exponential model with dispersion (BE+d model). This model is a representation of the orbit-response matrix depending...
Nils Lockmann
(DESY)
17/10/2019, 10:49
Poster: Beam Dynamics
At the European X-ray Free-Electron Laser, the spectral intensity of coherent diffraction radiation emitted at a screen with an aperture is monitored by a single-shot THz spectrometer. The spectrometer covers the range from 0.7-60 THz, which enables longitudinal form factor measurements of the electron bunch at the final compression stage. Iterative phase retrieval algorithm are used to obtain...
Weijia Wang
(Karlsruhe Institute of Technology (KIT))
17/10/2019, 10:51
Poster: Beam Dynamics
The KIT (Karlsruhe Institute of Technology) storage ring KARA (Karlsruhe Research Accelerator) aims at the stabilization of the emitted THz radiation to tackle the problem
of micro-bunching instability. A reinforcement learning based method are planed to be implemented through a RF feedback system located at storage ring. IPE (Institute of Data Processing and Electronics) developed a...
Dr
Aradhana Choudhuri
(DESY)
17/10/2019, 10:57
Poster: Beam Dynamics
We present the design, performance and long-term stability of the hybrid Yb:fiber, Nd:YVO4 laser used to generate electrons from the RF photocathode gun at the European XFEL facility. The laser provides deep UV output pulses in 600µs long bursts with variable internal repetition rate ranging from 564kHz to 1.1285MHz up to 4.5MHz. Due to its robust laser architecture, comprised of a mode-locked...
Dr
Aradhana Choudhuri
(DESY)
17/10/2019, 10:59
Poster: Beam Dynamics
The photocathode laser plays an important role for X-ray Free Electron Laser (XFEL) operation since the generated electron clouds at the gun determine many of the X-ray parameters. Its energy and pointing stability is a pre-requisite for stable X-ray pulse trains. The XUV FEL FLASH at DESY runs in burst-mode, where XUV pulses are emitted in 800 µs long bursts with up to 1MHz intra-burst...
Mr
Jost Mueller
(DESY)
17/10/2019, 14:00
Mr
Patrick Rauer
(Universität Hamburg)
17/10/2019, 14:20
Harald Klingbeil
17/10/2019, 14:40
Dr
Patrick Nonn
(DESY)
17/10/2019, 15:00
Speed talks: Controls/Seeding/DAQ
The Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is the first particle accelerator facility under construction in Turkey. The accelerator will deliver electrons to generate gamma radiation via Bremsstrahlung as well as to drive an IR-FEL. It consists of normal conducting and superconducting cavities. The MicroTCA Technology Lab is developing a turn-key LLRF system for this...
Dr
Patrick Nonn
(DESY)
17/10/2019, 15:02
Speed talks: Controls/Seeding/DAQ
The power consumption of a MicroTCA.4 slot is limited to 80 W. This limits the performance of CPUs, used in MicroTCA.4 crates. One option to circumvent this limitation, is to extend the PCI express bus of the crate to a high performance computer, instead.
This poster will present the experience gained with such a setup. It will further discuss some of the pros and cons of this setup in...
Jan Timm
(DESY)
17/10/2019, 15:10
Poster: Controls/Seeding/DAQ
ChimeraTK is a tool kit to write application servers for control systems.
When integrating the devices into a control system, the device servers usually contain a large fraction of error handling code. Many of these errors are runtime errors which occur when communicating with the hardware, and have similar handling strategies.
We report how ChimeraTK introduces a standardized way to raise...
Mr
Jan Marjanovic
(DESY)
17/10/2019, 15:12
Speed talks: Controls/Seeding/DAQ
Presented here are the latest updates from the development of the GigE Vision in
MicroTCA.
First we present the results of the certification process at AIA
plug-fest, where our implementation had to interface with cameras from several
vendors.
A new hardware platform (Struck SIS8160 - an Advanced Mezzanine Card for
MicroTCA platform) was also added to the list of supported hardware....
Ms
Meghana Mahaveer Patil
(KIT)
17/10/2019, 16:02
Poster: Controls/Seeding/DAQ
The photon science research at accelerators is influenced radically by the developments of sensor and readout technologies for imaging. It covers a wide range of applications fields both beam diagnostic and user systems, tomography and spectroscopy, etc. The repetition rate of commercially available linear array detectors is a limitation factor for the emerging synchrotron applications. To...
Mr
Jan Marjanovic
(DESY)
17/10/2019, 16:04
Poster: Controls/Seeding/DAQ
The ecosystem of FMC/FMC+ carriers in MicroTCA (Advanced Mezzanine Card form
factor) is very diverse. The requirements for such a board are very demanding,
and sometimes even opposing to each other. The definition of a set of
requirements that will satisfy most of the use cases is a challenging task.
Presented here is the DAMC-FMC2ZUP, a modern and high-performance FMC+ carrier
in AMC...
Mr
Mohammed bawatna
(HZDR)
17/10/2019, 16:06
Speed talks: Controls/Seeding/DAQ
The superradiant THz sources at TELBE facility is based on the new class of accelerator-driven terahertz (THz) radiation sources that provide high repetition rates up to 13 MHz, and flexibility of tuning the THz pulse form. The THz pulses are used for the excitation of materials of interest, about two orders of magnitude higher than state-of-the-art tabletop sources. Time-resolved experiments...
Andreas Schwarz
(Helmholtz-Zentrum Dresden-Rossendorf, radiation source ELBE)
17/10/2019, 16:08
Poster: Controls/Seeding/DAQ
- Overview of the Optical and Control Setup of the pulsed optical synchronization system at ELBE
- Results of performance measurements of the system done in 2019
- Actual Goals and Challenges
Mr
Andreas Ebersoldt
(KIT)
17/10/2019, 16:10
Poster: Controls/Seeding/DAQ
This poster presents the 2nd version of the Karlsruhe Pulse Taking Ultra-fast Readout Electronics (KAPTURE-2) for continuous sampling of ultra-short pulses generated by terahertz (THz) detectors. KAPTURE-2 is able to sample each pulse with 4 to 8 sampling points with a resolution of down to 1 ps and accepts flexible pulse repetition rates in a range from 0.2 to 3.6 GHz. Low noise combined with...
Sven Pfeiffer
(DESY)
17/10/2019, 16:14
Poster: Controls/Seeding/DAQ
Cryo Module Test Bench (CMTB) is a facility at DESY to perform Continuous Wave (CW) and pulsed tests on European XFEL cryomodules. The facility is equipped with a 120 kW Inductive Output Tube (IOT), and more than 180 W of cryogenic power at 2 K can be used for the tests. Since last Summer, a new accelerating module, namely XM50.1, is installed at CMTB. Such a device is the first production...
Ms
Louise Springer
(DESY)
17/10/2019, 16:16
Poster: Controls/Seeding/DAQ
Latest free electron lasers (e.g. the EuropeanXFEL) produce x-ray light pulses of below 100fs duration. For this type of accelerator a most precise field detection is required to control the accelerating field inside the superconducting RF cavities. Latest low level RF (LLRF) controls, which are working with the non-IQ detection scheme, are limited to a few femtosecond timing jitter resolution...
Sven Pfeiffer
(DESY)
17/10/2019, 16:25
Poster: Controls/Seeding/DAQ
The longitudinal intra-bunch train beam-based feedback is used to correct arrival time fluctuations of the electron bunches at the free-electron laser in Hamburg (FLASH). The arrival time information is measured by a bunch arrival time monitor (BAM). The novel bunch arrival corrector cavity (BACCA) has been successfully commissioned and characterized. BACCA is a normal conducting RF cavity,...
Prof.
Andreas Jankowiak
(HZB)
18/10/2019, 10:00
Anke-Susanne Mueller
(KIT)
18/10/2019, 10:20
Dr
Paul Goslawski
(Helmholtz-Zentrum Berlin, HZB)
18/10/2019, 11:20
Dr
Pavel Evtushenko
(HZDR / ELBE)
18/10/2019, 11:30
Dr
Erik Bruendermann
(KIT)
18/10/2019, 11:40
Dr
Michele Caselle
(KIT)
18/10/2019, 11:55
