Aug 22 – 26, 2022
Trieste Convention Centre
Europe/Zurich timezone

Session

Wednesday posters

WEP
Aug 24, 2022, 4:00 PM
Exhibition Hall (Trieste Convention Centre)

Exhibition Hall

Trieste Convention Centre

Presentation materials

There are no materials yet.
Björn Lautenschlager (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

A high temporal stability of produced photon pulses is a key parameter for some classes of experiments, e.g., those using a pump-probe scheme. A longitudinal intra bunch-train feedback system, that reduces the intra bunch-train and the train-to-train arrival time fluctuations down to the sub-10 fs level was implemented at the European X-ray free electron laser (EuXFEL). The low arrival time...

Mr Johnathan Ciplis (Ariel University)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

This project describes different techniques to manufacture THz mirrors with arbitrary surfaces. The research is part of the development of THz transmission line for the compact FEL-THz accelerator.
As an initial phase flat mirrors were 3D printed with FFF (Fused Filament Fabrication) and SLA (Stereolithography Apparatus). The impact of material, layer height and layer direction to mirror’s...

Gesa Goetzke (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Free electron lasers (FEL) serve a broad user community in many scientific fields ranging from
atomic and molecular physics to plasma and solid state physics as well as chemistry and biology.
Many experiments could benefit from a non-destructive online photon diagnostic of the provided
x-ray pulses. Especially, for free-electron lasers that are operated in the self-amplified sponta-
neous...

Zihan Zhu (Shanghai Institute of Applied Physics)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

For a free-electron laser facility, the longitudinal phase space of the beam is essential to the FEL lasing performance. However, the commonly-used diagnostics device such as the transverse deflecting cavity provides a destructive way to measure the beam longitudinal properties, which is not available during beam delivery. Thus, the convolutional neural network is introduced to construct a...

Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Brynes (Elettra-Sincrotrone Trieste S.C.p.A.), Bruno Diviacco (Elettra-Sincrotrone Trieste S.C.p.A.), Dr Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare), Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Optimal FEL gain in a seeded FEL requires the careful alignment of different components. As for SASE FELs, the gain is optimized when the electron bunch travels in a straight line along the axis of each undulator in the radiator section. We have recently developed an alignment strategy for the optimization of the FERMI FELs which combines the beam-based alignment of the magnetic elements...

Talgat Mamyrbayev (Paul Scherrer Institut)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

X-ray absorption spectroscopy (XAS) enables the study of the electronic and geometric structural properties of matter. Such investigations can now be realized with femtosecond temporal resolution owing to the availability of X-ray free-electron lasers (XFELs) [1]. However, most XFELs currently utilize self-amplified spontaneous emission (SASE), which causes strong shot-to-shot fluctuations of...

Kelin Tasca (European XFEL GmbH), Liubov Samoylova (European XFEL GmbH), Raymond Barrett (European Synchrotron Radiation Facility), Anders Madsen (European XFEL GmbH), Ilia Petrov (European XFEL GmbH), Dr Angel Rodriguez-Fernandez (European XFEL GmbH), Dr Roman Shayduk (European XFEL GmbH), Thu Nhi Tran Thi (European Synchrotron Radiation Facility), Alexey Zozulya (European XFEL GmbH), Maurizio Vannoni (European XFEL GmbH)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

The European X-ray Free-Electron Laser (EuXFEL) is a unique FEL facility that provides X-ray pulses of high spectral brilliance and high photon flux at MHz repetition rate. However, the high peak power, produced in trains of up 2700 femtosecond pulses at a rate of 10 Hz, induces a periodic temperature increase of the hard X-ray monochromators, thereby reducing their transmitted intensity. To...

Dr Alex Lumpkin (Fermi National Accelerator Laboratory), Henry Freund (University of New Mexico), Peter van der Slot (University of Twente)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

The electron-beam properties needed for successful implementation of a free-electron-laser oscillator (FELO) on a superconducting TESLA-type linac at the Fermilab Accelerator Science and Technology (FAST) facility include the intrinsic normalized emittance and the submacropulse centroid stability. We have demonstrated that short-range wakefields (SRWs) and long-range wakefields including...

Andrew Fisher (Particle Beam Physics Lab (PBPL)), Jason Jin (Particle Beam Physics Lab (PBPL)), Dr Pietro Musumeci (Particle Beam Physics Lab (PBPL))
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

A helical undulator provides a stronger FEL coupling than common planar geometries as the beam’s transverse velocity never vanishes. However, a significant challenge lies in tuning and measuring the fields with limited access to the beam axis along the undulator. Confirming the good field region off axis is difficult without space for 3D hall probe scans, and is important for low energy beams...

Dr Ye Chen (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

We present experimental observation for the impact of an introduced orbit disturbance in the photoinjector section on the SASE performance at the European XFEL. An orbit bump is first created and then closed by the orbit feedback downstream, that is, the orbit leaving the injector section stays the same while presumably only causing a disturbance to the bunch. With the same orbit launched into...

Rachel Margraf (SLAC National Accelerator Laboratory), James MacArthur (SLAC National Accelerator Laboratory), Gabriel Marcus (SLAC National Accelerator Laboratory), Heinz-Dieter Nuhn (SLAC National Accelerator Laboratory), Alberto Lutman (SLAC National Accelerator Laboratory), Dr Aliaksei Halavanau (SLAC National Accelerator Laboratory), Zhirong Huang (SLAC National Accelerator Laboratory)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

Electrons in a X-ray free electron laser (XFEL) develop periodic density fluctuations, known as microbunches, which enable the exponential gain of X-ray power in an XFEL. When an electron beam microbunched at a hard X-ray wavelength is kicked, microbunches are often washed out due to the dispersion and R56 of the bend. An achromatic (dispersion-free) bend with small R56, however, can...

Stuart Walker (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

It has been proposed that a new arc, called T20, should be installed for a third fan of undulators at the EuXFEL in the next decade. Due to geometric constraints this arc will need to be at a much larger angle than for the existing arc (T1). It is expected therefore that coherent synchrotron radiation effects in T20 on the bunch emittances will be considerable. To preserve the x-ray beam...

Sven Reiche (Paul Scherrer Institut), Paolo Craievich (Paul Scherrer Institut), Thomas Schietinger (Paul Scherrer Institut), Mattia Schaer (Paul Scherrer Institut)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

It is planned to extend SwissFEL by a third beamline, named Porthos, operating in the hard X-ray regime. Three bunches will be accelerated within one RF pulse and distributed into the different beamlines with resonant kickers operating at the bunch spacing of a few tens of nanoseconds.
While the full extent of Porthos will not be realized before the end of this decade the extraction line from...

Adnan Haj Yahya (Ariel University Center of Samaria)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Terahertz (THz) radiation may pass through dielectric materials, and this ability can be used for a variety of applications. Terahertz (THz) radiation is located between infrared and microwave radiations in the electromagnetic spectrum. FEL produces brief, high-power THz single pulses, and we provide a diagnostic approach for them. The electro optic efficacy is used as a detection method. For...

Florian Dietrich (European XFEL GmbH), Jan Grünert (European XFEL GmbH), Jia Liu (European XFEL GmbH), Joakim Laksman (European XFEL GmbH), Marc Planas (European XFEL GmbH), Naresh Kujala (European XFEL GmbH), Randeer Pratap Gautam (European XFEL GmbH), Dr Sonia Francoual (European XFEL GmbH), Theophilos Maltezopoulos (European XFEL GmbH), Wolfgang Freund (European XFEL GmbH)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Development and characterization of an angle-resolved photo-electron spectrometer, based on the electron Time-of-Flight concept, designed for hard X-ray photon diagnostics at the European free-electron laser is described. The objective with the instrument is to provide beamline users and operators with pulse resolved, non-invasive spectral distribution diagnostics, which in the hard X-ray...

Sangyoon Bae (Korea Atomic Energy Research Institute)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

We were able to realize a compact microtron accelerator with 5 MeV electron beam acceleration energy and a hybrid electro-magnetic undulator that can vary the magnetic field of 1.07 T at 0.74 T. The electron beam is accelerated by an RF electric field of a 1-cell acceleration cavity and recirculated by a uniform magnetic field of the microtron main chamber. Through the re circulation process,...

Mr Rene Padilla (Santa Cruz Institute for Particle Physics), Ms Isleydys Silva Torrecilla (SLAC National Accelerator Laboratory), Dr Diling Zhu (SLAC National Accelerator Laboratory), Eric Gonzalez (Santa Cruz Institute for Particle Physics), Serguei Kachiguine (Santa Cruz Institute for Particle Physics), Forest Martinez-Mckinney (Santa Cruz Institute for Particle Physics), Simone Mazza (Santa Cruz Institute for Particle Physics), Mohammad Nizam (Santa Cruz Institute for Particle Physics), Nora Norvell (University of California, Santa Cruz), Emma Potter (Santa Cruz Institute for Particle Physics), Eric Ryan (Santa Cruz Institute for Particle Physics), Bruce Schumm (Santa Cruz Institute for Particle Physics), Michal Tarka (Santa Cruz Institute for Particle Physics), Max Wilder (Santa Cruz Institute for Particle Physics), Bryce Jacobson (SLAC National Accelerator Laboratory), James MacArthur (SLAC National Accelerator Laboratory), Dr Jen Bohon (Los Alamos National Laboratory), Dongsung Kim (Los Alamos National Laboratory), Dr John Smedley (Los Alamos National Laboratory), Carl Grace (Lawrence Berkeley National Laboratory), Tarun Prakash (Lawrence Berkeley National Laboratory), Charles Harris (Sandia National Laboratories), David Stuart (University of California at Santa Barbara), Eric Prebys (University of California at Davis)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

FELs deliver rapid pulses on the femtosecond scale, and high peak intensities that fluctuate strongly on a pulse-to-pulse basis. The fast drift velocity and high radiation tolerance properties of chemical vapor deposition (CVD) diamonds make these crystals a good candidate material for developing a high frame rate pass-through diagnostic for the next generation of XFELs. We report on two...

Jaroslaw Szewinski (National Centre for Nuclear Research)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

PolFEL stands for Polish Free Electron Laser, the first FEL research infrastructure in Poland. This facility is under development, and it will operate in three wavelength ranges: IR, THz and VUV, using different types of undulators. Machine will be driven by 200 MeV linear superconducting accelerator, which will operate in both, pulsed wave (PW) and continuous wave (CW) modes. This...

Nazanin Samadi (Paul Scherrer Institut)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Diffraction gratings are an essential instrument used at free-electron laser facilities in soft and tender x-ray ranges. Their application ranges from monochromators and analyzers to self-seeding and pulse compression. These gratings are typically around 50-200 mm, up to 500mm in length with pitches from a few micrometers down to a few 100 nm, made on flat or curved substrates. Blazed gratings...

Alex Lumpkin (Argonne National Laboratory), Donald Rule (Naval Surface Warfare Center), Pietro Musumeci (University of California, Los Angeles)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

Co-propagating a relativistic electron beam and a high-power laser pulse through a short undulator (modulator) provides an energy modulation which can be converted to a periodic longitudinal density modulation (or microbunching) via the R56 term of a chicane. Such pre-bunching of a beam at the resonant wavelength and the harmonics of a subsequent free-electron laser (FEL) amplifier seeds the...

Marco Veronese (Elettra-Sincrotrone Trieste S.C.p.A.), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Brynes (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Di Mitri (Elettra-Sincrotrone Trieste S.C.p.A.), Mario Ferianis (Elettra-Sincrotrone Trieste S.C.p.A.), Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare), Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni Perosa (University of Trieste, Elettra Sincrotrone Trieste), Eléonore Roussel (Laboratoire de Physique des Lasers, Atomes et Molécules), Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

The presence of microbunching in the FERMI FEL electron beam is a known nuisance that can impact the performance of the FEL. Microbunching is generated by complex dynamics along the machine where there are several amplification sources. The use of a laser heater, at the cost of an increased energy spread, can improve the quality of the electron beam mitigating the modulation due to...

Erion Gjonaj (Technische Universität Darmstadt)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

Intrabeam scattering (IBS) causes growth of the uncorrelated energy spread of electron bunches due to multiple small-angle Coulomb collisions over long propagation distances. As such, this effect may be a limiting factor for the beam current and therefore for the achievable photon energy in the SASE process. In addition, IBS influences the noise spectrum of the bunch, thus, interfering with...

Olga Falowska-Pietrzak (Stockholm University), Anders Hedqvist (Stockholm University), Fredrik Hellberg (Stockholm University), Guillermo Lopez Basurco (Universidad Autonoma de Madrid), Frederik Wolff-Fabris (European XFEL GmbH)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

The European X-Ray Free Electron Laser (XFEL) operates three Undulator Systems to generate high-brilliance and high repetition X-ray pulses. Each System consists of multiple 5-m long undulator segments separated by 1.1-m long intersections. Such intersections contain vacuum systems, diagnostic and correction equipment for the electron's trajectory, and phase shifters (PS) [1] to match the...

Dr Amin Ghaith (Helmholtz-Zentrum Dresden-Rossendorf), Jurjen Couperus Cabadag (Helmholtz-Zentrum Dresden-Rossendorf), Prof. Ulrich Shramm (Helmholtz-Zentrum Dresden-Rossendorf), Arie Irman (Helmholtz-Zentrum Dresden-Rossendorf), Marie Labat (Synchrotron Soleil), Alexandre Loulergue (Synchrotron Soleil), Marie-Emmanuelle Couprie (Synchrotron Soleil), Eléonore Roussel (Laboratoire de Physique des Lasers, Atomes et Molécules)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

The tremendous developments on Laser Plasma Accelerators (LPAs) have significantly improved the electron beam properties and stability making it possible to drive a Free Electron Laser (FEL). We report on the electron beam transport and manipulation using the COXINEL beamline implemented at HZDR that has recently led to the first measurements of an LPA-based seeded FEL in the UV region. Our...

David Dunning (Science and Technology Facilities Council), Amelia Pollard (Science and Technology Facilities Council), Minerva Maheshwari (Science and Technology Facilities Council), Anthony Gilfellon (Science and Technology Facilities Council), William Okell (Science and Technology Facilities Council), Edward Snedden (Science and Technology Facilities Council)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

CLARA is an electron beam test facility being developed in phases at STFC Daresbury Laboratory. The first phase, with up to 35 MeV electron beam energy, has been operated since 2018 for a wide range of accelerator applications. The second phase, presently being installed, will expand the range of applications by taking the beam to 250 MeV energy and via a dog-leg to an experimental station...

Daria Astapovych (Karlsruhe Institute of Technology), Nicole Glamann (Karlsruhe Institute of Technology), Andreas Grau (Karlsruhe Institute of Technology), Bennet Krasch (Karlsruhe Institute of Technology), David Saez de Jauregui (Karlsruhe Institute of Technology)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

The superconducting undulator (SCU) based on the second-generation high-temperature superconducting (HTS) tapes is a promising application for building tabletop free-electron lasers (FELs). The short period < 10 mm undulators with a narrow magnetic gap < 4 mm are especially relevant. The advantage of the HTS tape is that it shows both high critical current density and high critical magnetic...

Sven Reiche (Paul Scherrer Institut), Marco Calvi (Paul Scherrer Institut), Romain Ganter (Paul Scherrer Institut), Eugenio Ferrari (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

Orbit response measurements in the soft X-ray beamline of Athos have shown coupling of the beam transport between the transverse planes, which is influenced by the on-axis field strength of the Apple-X undulator modules. A model reproduces this observation if a coupling term is included in the transport matrix of the undulator module. The presentation shows the estimate of the coupling...

Dr Liang Zhang (University of Strathclyde and Cockcroft Institute), Jack Easton (Department of Physics, SUPA, University of Strathclyde), Dr Craig Donaldson (University of Strathclyde and Cockcroft Institute), Colin Whyte (University of Strathclyde), Adrian Cross (University of Strathclyde and Cockcroft Institute), Jim Clarke (Science and Technology Facilities Council and Cockcroft Institute)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

Electromagnetic wave undulators have the advantage of a shorter period compared with the permanent magnet undulators when operating at high frequency, therefore producing FEL radiation at the same wavelength with less electron energy. This paper investigates the properties of a Ka-band microwave undulator, and the factors that affect the choice of the high-power drive sources, through the...

Mr Francesco Tripaldi (Elettra-Sincrotrone Trieste S.C.p.A.), Giulio Gaio (Elettra-Sincrotrone Trieste S.C.p.A.), Fabio Galassi (Elettra-Sincrotrone Trieste S.C.p.A.)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

Despite the use in machine physics of high-performance software for calculating and predicting machine parameters, when these are applied to the real world, optimal operating point search is often necessary to obtain the desired performance.
Furthermore, small configuration changes required by FEL Users during running experiments ,lead to search new good working points in a short time.
Use...

Dr Vladimir Vogel (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Valeri Ayvazyan (Deutsches Elektronen-Synchrotron), Julien Branlard (Deutsches Elektronen-Synchrotron), Lukasz Butkowski (Deutsches Elektronen-Synchrotron), Stefan Choroba (Deutsches Elektronen-Synchrotron), Jens Hartung (Deutsches Elektronen-Synchrotron), Mr Nicholas Walker (Deutsches Elektronen-Synchrotron), Steffen Wiesenberg (Deutsches Elektronen-Synchrotron), Michael Bousonville (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Andrey Cherepenko (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Sebastian Goeller (Deutsches Elektronen-Synchrotron DESY at Zeuthen)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

Currently 26 RF stations are in operation at the European X-ray Free Electron Laser (XFEL) and all RF stations can deliver sufficient power to reach maximum gradients in the accelerating modules, limited only by cavity and coupler properties. It was demonstrated that by activating a dynamic frequency shift (DFS) of the RF drive signal, the requested klystron power can be reduced by up to 20%,...

Sven Reiche (Paul Scherrer Institut)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

With the beam synchronous readout of the beam position measurement at the hard X-ray FEL beamline Aramis at SwissFEL we analyze the intrinsic orbit jitter, using a classification algorithm and Principal Component Analysis (PCA). The method sorts the jitter in a set of eigenvectors and -values. With the magnitude of the eigenvalues the impact of the different jitter sources can be estimated....

Mathias Vogt (Deutsches Elektronen-Synchrotron), Juliane Roensch-Schulenburg (Deutsches Elektronen-Synchrotron), Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Florian Christie (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

In January 2021 two X-band (12 GHz) PolariX Transverse Deflecting Structures with variable streak polarization were installed into the FLASH2 beamline at FLASH. Since none of the RF components for the FLASH2-PolariX RF-distribution system nor the two PolariX structures could be pre-conditioned, RF-conditioning was and is quite tedious. Nevertheless, after 6 weeks of conditioning, we have...

Paolo Craievich (Paul Scherrer Institut), Juergen Alex (Paul Scherrer Institut), Hans-Heinrich Braun (Paul Scherrer Institut), Romain Ganter (Paul Scherrer Institut), Zheqiao Geng (Paul Scherrer Institut), Roger Kalt (Paul Scherrer Institut), Thomas Klebb (Paul Scherrer Institut), Thomas Lucas (Paul Scherrer Institut), Fabio Marcellini (Paul Scherrer Institut), Ralf Menzel (Paul Scherrer Institut), Marco Pedrozzi (Paul Scherrer Institut), Eduard Prat (Paul Scherrer Institut), Sven Reiche (Paul Scherrer Institut), Wolfgang Tron (Paul Scherrer Institut), Riccardo Zennaro (Paul Scherrer Institut), Michael D'Amico (Paul Scherrer Institut), Reto Fortunati (Paul Scherrer Institut), Carl Beard (Paul Scherrer Institut)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

In 2017, a collaboration between DESY, PSI and CERN was established with the aim of developing and building seven advanced X-Band Transverse Deflection Structure (TDS) with the new feature of variable polarization of the deflecting force. Seven deflectors were produced by PSI of which five were installed in three experiments at DESY, while the remaining two were installed in the ATHOS soft...

Alberto Petralia (ENEA Fusion and Technology for Nuclear Safety and Security Department), Mariano Carpanese (ENEA Fusion and Technology for Nuclear Safety and Security Department), Mario Del Franco (INFN Laboratori Nazionali di Frascati), Andrea Doria (ENEA Fusion and Technology for Nuclear Safety and Security Department), Federico Nguyen (ENEA Fusion and Technology for Nuclear Safety and Security Department), Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare), Andrea Selce (ENEA Fusion and Technology for Nuclear Safety and Security Department)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

We present the study for a short period Apple-X variable polarizing undulator, with small gap of operation and high magnetic field, which will be the base module for the AQUA line of the EuPRAXIA@SPARC_LAB FEL facility, of next realization at INFN Laboratory of Frascati. The undulator allows to achieve radiation between 3 and 5 nm, the so called water-window, with a 1 GeV electron beam energy,...

Mr Chih-Kai Liu (Department of Physics, National Central University), Prof. Shih-Hung Chen (Department of Physics, National Central University), Dr Wai-Keung Lau (National Synchrotron Radiation Research Center), Dr Wei-Yuan Chiang (National Synchrotron Radiation Research Center), Mr Shan You Teng (Department of Physics, National Central University)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

In this report, we present a simulation study of dielectric beam energy dechirper designed for the proposed NSRRC EUV FEL facility. As revealed from ELEGANT simulation of the high brightness driver linac system, a residual energy chirp of about 42 keV/m is left after bunch compression. It can be corrected by a capacitive dechirper structure when the bunch is slightly over-compressed. We...

Stefan Düsterer (Deutsches Elektronen-Synchrotron)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

The free-electron laser in Hamburg (FLASH) operates in the extreme ultraviolet (XUV) and soft X-ray region, providing photon pulses of few femtosecond (fs) duration and unprecedented intensity [1]. FLASH operates in the self-amplified spontaneous emission (SASE) regime, meaning that every pulse has a unique combination of energy, spectrum, arrival time and pulse duration. Therefore, it is...

Fanglei Lin (Oak Ridge National Laboratory), Jiquan Guo (Thomas Jefferson National Accelerator Facility), Vasiliy Morozov (Oak Ridge National Laboratory), Yuhong Zhang (Thomas Jefferson National Accelerator Facility)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

We propose to develop an energy-recovery-linac (ERL)-based X-ray free-electron laser (FEL). Taking advantage of the demonstrated high-efficiency energy recovery of the beam power in the ERL, the proposed concept offers the following benefits: i) recirculating the electron beam through high-gradient SRF cavities shortens the linac, ii) energy recovery in the SRF linac saves the klystron power...

Michele Manfredda (Elettra-Sincrotrone Trieste S.C.p.A.)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

KAOS is the flagship optics of FERMI, the first - and presently only - fully seeded Free Electron Laser facility in the world. The name stands for Kirkpatrick-Baez Active Optical System, and it has been entirely developed in-house. After progressive revisions and upgrades, it presently empowers three out of six beamlines at FERMI, and it also serves two beamlines at FLASH, Hamburg (DiProI,...

Natalia Gerasimova (European XFEL GmbH)
8/24/22, 4:00 PM
Photon beamline instrumentation & undulators
Contributed Poster

The SASE3 soft X-ray beamline at the European XFEL is equipped with the grating monochromator allowing to reduce SASE FEL bandwidth and to improve longitudinal coherence at the experiments in the photon energy range 250 eV - 3000 eV. The design of the monochromator is challenged by a demand to control both photon energy resolution and temporal resolution; the aim to transport close to...

Alexander Brynes (Elettra-Sincrotrone Trieste S.C.p.A.), Mauro Trovo (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Di Mitri (Elettra-Sincrotrone Trieste S.C.p.A.), Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni Perosa (Elettra-Sincrotrone Trieste S.C.p.A.), Dr Luca Giannessi (Elettra-Sincrotrone Trieste S.C.p.A.)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

Good control over the transverse distribution of an electron bunch is crucial for optimising the beam transport through a linear accelerator, and for improving the energy transfer of electrons to photons within the undulators of a free-electron laser (FEL). In order to achieve this, it is necessary to match, as closely as possible, the Twiss parameters of the electron bunch to the design...

Johan Lundquist (Lund University), Sverker Werin (Lund University), Francesca Curbis (Lund University)
8/24/22, 4:00 PM
Electron diagnostics, timing, synchronization & controls
Contributed Poster

Accurate and high resolution detection of the Longitudinal Phase Space (LPS) of the electron beam is a great advantage for operating and setting up a FEL. In the case of the soft X-ray FEL being proposed at the MAX IV synchrotron facility in Lund, this information is mainly supplied by a Transverse Deflecting Cavity (TDC) which is currently being installed and scheduled for commissioning in...

He Liu (Shanghai Institute of Applied Physics), Jiawei Yan (European XFEL GmbH), Haixiao Deng (Shanghai Advanced Research Institute Chinese Academy of Science), Bo Liu (Shanghai Advanced Research Institute Chinese Academy of Science)
8/24/22, 4:00 PM
Electron beam dynamics
Contributed Poster

In free electron lasers (FEL) the accumulative effects of wakefields always lead to critical impacts on the electron bunch, resulting in an energy spread and deviation of transverse position. Thus the lasing performance will be decreased. The Shanghai high-repetition-rate XFEL and extreme light facility (SHINE) is under construction and the wakefields estimations are required. The SHINE...