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

Session

Tuesday posters

TUP
Aug 23, 2022, 4:00 PM
Exhibition Hall (Trieste Convention Centre)

Exhibition Hall

Trieste Convention Centre

Presentation materials

There are no materials yet.
Christian Koschitzki (Deutsches Elektronen-Synchrotron DESY at Zeuthen)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

In this paper, a cathode laser pulse shaper at 515 nm is presented that will be used for emittance optimizations. In case alkali antimonide photocathodes are used, the shaped green pulses can be applied directly for photoemission while Cs2Te photocathodes requires second harmonic generation to provide UV laser pulses. Recent tests of CsK2Sb photocathodes in the high...

Rick van den Berg (Technische Universiteit Eindhoven)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

At Eindhoven university an inverse Compton scattering (ICS) source is being built. The ICS source consists of a 100kV photo gun electron injector, X-band accelerator, and interaction laser. One of the first upgrades for this ICS source is operating in a so-called burst mode. In burst mode, the electron injector is replaced by the advanced continuous electron (ACE) injector and a Fabry-Perot...

Patrick Rauer (Deutsches Elektronen-Synchrotron), Winfried Decking (Deutsches Elektronen-Synchrotron), Daniele La Civita (European XFEL GmbH), Andreas Koch (European XFEL GmbH), Harald Sinn (European XFEL GmbH), Immo Bahns (European XFEL GmbH), Jan Grünert (European XFEL GmbH), Liubov Samoylova (European XFEL GmbH), Massimiliano Di Felice (European XFEL GmbH), Maurizio Vannoni (European XFEL GmbH), Jörg Rossbach (University of Hamburg)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

An X-ray free-electron laser oscillator (XFELO) is a next generation X-ray source promising radiation with full three-dimensional coherence, nearly constant pulse to pulse stability and more than an order of magnitude higher spectral flux compared to SASE FELs. In this contribution, the concept of an R&D project for installation of an XFELO demonstrator experiment at the European XFEL facility...

Najmeh Mirian (Deutsches Elektronen-Synchrotron), Tianyun Long (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Recently, Hard x-ray self-seeding (HXRSS) operations at the European X-ray free-electron laser (EuXFEL) opened a pathway towards the application of pulses with high spectral density (in terms of ph/eV per pulse) in the fields of applied physics, chemistry and biology, where the coherent radiation spectrum is essential. The spectrum of hard x-ray self seeding pulses is generally accompanied by...

Dr Michele Opromolla (University of Milan and INFN-Milan), Vittoria Petrillo (Universita' degli Studi di Milano), Federico Nguyen (Ente per le Nuove Tecnologie, l'Energie e l'Ambiente), Andrea Selce (Ente per le Nuove Tecnologie, l'Energie e l'Ambiente), Francesco Stellato (Sezione di Roma Tor Vergata), Marcello Coreno (Elettra-Sincrotrone Trieste S.C.p.A. and CNR-ISM), Massimo Ferrario (Istituto Nazionale di Fisica Nucleare), Andrea Ghigo (Istituto Nazionale di Fisica Nucleare), Dr Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare), Augusto Marcelli (Istituto Nazionale di Fisica Nucleare), Fabio Villa (Istituto Nazionale di Fisica Nucleare), Alberto Petralia (Ente per le Nuove Tecnologie, l'Energie e l'Ambiente), Dr Zeinab Ebrahimpour (Istituto Nazionale di Fisica Nucleare)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

EuPRAXIA@SPARC_LAB is a new Free Electron Laser (FEL) facility that is currently
under construction at the Laboratori Nazionali di Frascati of the INFN. The electron
beam driving the FEL will be delivered by an X-band normal conducting LINAC followed
by a plasma wakefield acceleration stage. It will be characterized by a small
footprint and include two different plasma-driven photon...

Dr Paolo Tomassini (CNR-INO and ELI-NP), Dr Luca Giannessi (INFN-LNF, Elettra Sincrotrone Trieste), Anna Giribono (Istituto Nazionale di Fisica Nucleare), Federico Nguyen (Ente per le Nuove Tecnologie, l'Energie e l'Ambiente), Dr Leonida A. Gizzi (CNR-INO and INFN-PI)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Laser Wakefield Accelerators are now sufficiently mature to provide GeV scale/high-brightness electron beams capable of driving Free Electron Laser (FEL) sources. Here, we show start-to-end simulations carried out in the framework of the EuPRAXIA project of a Free Electron Laser driven by an LWFA accelerator in the Resonant Multi-Pulse Ionisation Injection (ReMPI) framework. Simulations...

Dmitrii Samoilenko (University of Hamburg)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Externally seeded FELs can produce fully coherent short-wavelength pulses with the advantage of higher shot-to-shot stability and spectral intensity than SASE radiation. For the FLASH2020+ project, the Echo-Enabled Harmonic Generation (EEHG) seeding technique achieves seeded FEL radiation in the XUV and soft X-ray range down to wavelengths of 4 nm. The implementation of the EEHG requires...

David Garzella (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

In optical conventional lasers, chirped pulse amplification (CPA) has become an extremely powerful technique for the generation of ultrashort pulses in the infrared and visible spectral ranges. In this contribution we report the successful implementation of CPA in a seeded XUV FEL. A second experiment, using a two-stage harmonic generation scheme (FERMI FEL-2) has the objective to generate...

Nuaman Shafqat (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

ERMI is the seeded Free Electron Laser (FEL) user facility at Elettra laboratory in Trieste, operating in the VUV to soft X-rays spectral range. In order to extend the FEL spectral range to shorter wavelengths, an upgrade plan for increasing the Linac energy from 1.5 GeV to 2.0 GeV is actually going on. After successful testing of the short prototype of new high gradient S-band accelerating...

Francesca Curbis (Lund University), Mihai Pop (MAX IV Laboratory), Sverker Werin (MAX IV Laboratory), Saeid Pirani (Lund University)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Improvement of the longitudinal coherence in the proposed Soft Xray FEL, the SXL, for the MAX IV Laboratory is an important design aspect to enhance the user case. One of the main considered methods is HBSASE. However the final compression in the MAX IV acceleratos is done at full energy, and thus leaving an energy chirp in the electron pulse. This chirp in longitudinal phase space has to be...

Pavel Evtushenko (Helmholtz-Zentrum Dresden-Rossendorf)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

A new concept of a high repetition rate VUV FEL is discussed. The FEL is envisioned to operate in the wavelength range from 50 to 250 nm with pulse energies of about 30 µJ throughout the wavelength range, and a pulse length of a few 100 fs. The SRF LINAC technology developed and used at the Helmholtz-Zentrum Dresden-Rossendorf for the Radiation Source ELBE is planned to be used for the...

Romain Ganter (Paul Scherrer Institut), Alexandre Trisorio (Paul Scherrer Institut), Carlo Vicario (Paul Scherrer Institut), Eduard Prat (Paul Scherrer Institut), Kittel Christoph (Paul Scherrer Institut), Gabriel Aeppli (Paul Scherrer Institut), Christopher Arrell (Paul Scherrer Institut), Hans-Heinrich Braun (Paul Scherrer Institut), Marco Calvi (Paul Scherrer Institut), Adrian Cavalieri (Paul Scherrer Institut), Andreas Dax (Paul Scherrer Institut), Philipp Dijkstal (Paul Scherrer Institut), Eugenio Ferrari (Paul Scherrer Institut), Nicole Hiller (Paul Scherrer Institut), Martin Huppert (Paul Scherrer Institut), Pavle Juranic (Paul Scherrer Institut), Xiaoyang Liang (Paul Scherrer Institute), Stefan Neppl (Paul Scherrer Institut), Eduard Prat (Paul Scherrer Institut), Sven Reiche (Paul Scherrer Institut), Didier Voulot (Paul Scherrer Institut)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

In order to improve the brightness and coherence of the soft x-ray FEL line of SwissFEL (Athos), components for an Echo Enabled Harmonic Generation (EEHG) scheme are currently in preparation. The first components have been installed to allow first ESASE operation test in Spring 2022. This first stage consists in a 10 mJ class seed laser, a U200 modulator with individual control of each half...

Zhirong Huang (SLAC National Accelerator Laboratory)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Cavity-based X-ray Free Electron Lasers (FELs) such as the X-ray regenerative amplifier FEL (XRAFEL) [1] and the X-ray FEL oscillator [2] have drawn great interest as a means of producing high-brightness, fully coherent and stable hard x-ray pulses for high-repetition rate FELs [3]. However, high efficiency outcoupling of the stored cavity x-ray radiation remains challenging. Here we present a...

David Dunning (Science and Technology Facilities Council), James Clarke (Science and Technology Facilities Council), Louise Cowie (Science and Technology Facilities Council), Neil Thompson (Science and Technology Facilities Council)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

In early 2019, the UK initiated a project to develop the science case for a UK XFEL, featuring a diverse team of UK scientists and international advisors. Accelerator scientists were engaged to highlight potential future accelerator developments and to develop concept outlines for a facility design meeting the requirements for world-leading capabilities. The UK XFEL Science Case, featuring the...

Pietro Musumeci (University of California, Los Angeles)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

In this paper we'll describe the status of the FAST-GREENS experimental program where a 4 m-long strongly tapered helical undulator with a seeded prebuncher is used in the high gain TESSA regime to convert a significant fraction (up to 10 %) of energy from the 240 MeV electron beam from the FAST linac to coherent 515 nm radiation. We'll also discuss the longer term plans for the setup where by...

Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Laura Badano (Elettra-Sincrotrone Trieste S.C.p.A.), Filippo Bencivenga (Elettra-Sincrotrone Trieste S.C.p.A.), Carlo Callegari (Elettra-Sincrotrone Trieste S.C.p.A.), Flavio Capotondi (Elettra-Sincrotrone Trieste S.C.p.A.), Davide Castronovo (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Cinquegrana (Elettra-Sincrotrone Trieste S.C.p.A.), Marcello Coreno (Elettra-Sincrotrone Trieste S.C.p.A.), Miltcho Danailov (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Delgiusto (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Demidovich (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Di Mitri (Elettra-Sincrotrone Trieste S.C.p.A.), William Fawley (SLAC National Accelerator Laboratory), Mario Ferianis (Elettra-Sincrotrone Trieste S.C.p.A.), Giulio Gaio (Elettra-Sincrotrone Trieste S.C.p.A.), Gabor Kurdi (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Lonza (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Malvestuto (Elettra-Sincrotrone Trieste S.C.p.A.), Michele Manfredda (Elettra-Sincrotrone Trieste S.C.p.A.), Claudio Masciovecchio (Elettra-Sincrotrone Trieste S.C.p.A.), Ivaylo Nikolov (Elettra-Sincrotrone Trieste S.C.p.A.), Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.), Gregory Penn (Lawrence Berkeley National Laboratory), Giovanni Perosa (University of Trieste, Elettra Sincrotrone Trieste), Kevin Prince (Elettra-Sincrotrone Trieste S.C.p.A.), Primoz Rebernik Ribic (Elettra-Sincrotrone Trieste S.C.p.A.), Claudio Scafuri (Elettra-Sincrotrone Trieste S.C.p.A.), Nuaman Shafqat (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Sigalotti (Elettra-Sincrotrone Trieste S.C.p.A.), Alberto Simoncig (Elettra-Sincrotrone Trieste S.C.p.A.), Filippo Sottocorona (University of Trieste, Elettra Sincrotrone Trieste), Luca Sturari (Elettra-Sincrotrone Trieste S.C.p.A.), Takashi Tanaka (RIKEN SPring-8 Center), Mauro Trovo (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Veronese (Elettra-Sincrotrone Trieste S.C.p.A.), Roberto Visintini (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Zangrando (Elettra-Sincrotrone Trieste S.C.p.A.), Federico Gelmetti (Elettra-Sincrotrone Trieste S.C.p.A.), Bruno Diviacco (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

In order to meet the user request of extending the FERMI FEL spectral range over the whole water window, we are developing an upgrade strategy that is based on the implementation of the Echo Enabled Harmonic Generation (EEHG) scheme.
The FERMI upgrade strategy is structured as follow: during a first phase, the single cascade FEL-1 branch will be adapted to operate either in EEHG or in HGHG....

Sheida Mahmoodi (University of Hamburg), Mehdi Mohammad Kazemi (Deutsches Elektronen-Synchrotron), Samuel Hartwell (Deutsches Elektronen-Synchrotron), Lucas Schaper (Deutsches Elektronen-Synchrotron), Mathias Vogt (Deutsches Elektronen-Synchrotron), Andreas Thiel (University of Hamburg), Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Dmitrii Samoilenko (University of Hamburg), Philipp Amstutz (Deutsches Elektronen-Synchrotron), Eugenio Ferrari (Deutsches Elektronen-Synchrotron), Wolfgang Hillert (University of Hamburg), Fabian Pannek (University of Hamburg), Georgia Paraskaki (Deutsches Elektronen-Synchrotron), Juliane Roensch-Schulenburg (Deutsches Elektronen-Synchrotron), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Florian Christie (Deutsches Elektronen-Synchrotron), Sven Ackermann (Deutsches Elektronen-Synchrotron), Pardis Niknejadi (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The FLASH facility houses a superconducting linac powering two FEL beamlines with MHz repetition rate in 10 Hz bursts. Within the FLASH2020+ project, which is taking care of facility development, one major aspect is the transformation of one of the two FEL beam lines to deliver externally seeded fully coherent FEL pulses to photon user experiments. At the same time the second beam line will...

Lucas Schaper (Deutsches Elektronen-Synchrotron), Philipp Amstutz (Deutsches Elektronen-Synchrotron), Nicoleta Baboi (Deutsches Elektronen-Synchrotron), Karolin Baev (Deutsches Elektronen-Synchrotron), Martin Beye (Deutsches Elektronen-Synchrotron), Christopher Gerth (Deutsches Elektronen-Synchrotron), Ingmar Hartl (Deutsches Elektronen-Synchrotron), Katja Honkavaara (Deutsches Elektronen-Synchrotron), Jochen Mueller-Dieckmann (Deutsches Elektronen-Synchrotron), Rui Pan (Deutsches Elektronen-Synchrotron), Elke Ploenjes-Palm (Deutsches Elektronen-Synchrotron), Olaf Rasmussen (Deutsches Elektronen-Synchrotron), Juliane Roensch-Schulenburg (Deutsches Elektronen-Synchrotron), Evgeny Schneidmiller (Deutsches Elektronen-Synchrotron), Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Kai Tiedtke (Deutsches Elektronen-Synchrotron), Markus Tischer (Deutsches Elektronen-Synchrotron), Sven Toleikis (Deutsches Elektronen-Synchrotron), Rolf Treusch (Deutsches Elektronen-Synchrotron), Mathias Vogt (Deutsches Elektronen-Synchrotron), Lutz Winkelmann (Deutsches Elektronen-Synchrotron), Mikhail Yurkov (Deutsches Elektronen-Synchrotron), Johann Zemella (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The FLASH2020+ project has started to transform the FLASH facility to broaden the facility profile and meet demands of future user experiments.
In a nine-month lasting shutdown until August 2022 the linear accelerator of the FLASH facility has, among others, been upgraded with a laser heater, new bunch compressors and new modules. The latter results in an energy upgrade to 1.35 GeV allowing...

Andrea Ghigo (Istituto Nazionale di Fisica Nucleare)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

The possibility of using a plasma accelerated electron beam to generate Free Electron Laser (FEL) radiation has recently been proven. In the plasma acceleration process an intense broadband spectrum radiation in the X ray region, the betatron radiation, is produced by the electron beam passing through the ionized gas.
In this paper it is proposed to use this radiation, suitably...

Dirk Noelle (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Frequency mixing was studied experimentally at SASE3, the soft X-ray undulator of the European XFEL. Two frequencies were generated in the first part of the undulator in alternating K configuration. The mixing process occurred in the second part with detuned undulator segments used to generate R56. Finally, the difference frequency was radiated and amplified in a third part of the SASE3...

Najmeh Mirian (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Free-electron lasers producing ultrashort pulses with high peak power are a resource to extend ultrafast non-linear spectroscopic techniques into the extreme-ultraviolet–X-ray regime. A super radiant cascade was proposed as a method to shorten the pulse duration in seeded FEL. Pulses shorter than the typical duration supported by the FEL gain bandwidth of the FEL amplifier in the linear regime...

Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Laura Badano (Elettra-Sincrotrone Trieste S.C.p.A.), Filippo Bencivenga (Elettra-Sincrotrone Trieste S.C.p.A.), Carlo Callegari (Elettra-Sincrotrone Trieste S.C.p.A.), Flavio Capotondi (Elettra-Sincrotrone Trieste S.C.p.A.), Davide Castronovo (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Cinquegrana (Elettra-Sincrotrone Trieste S.C.p.A.), Marcello Coreno (Elettra-Sincrotrone Trieste S.C.p.A.), Miltcho Danailov (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Demidovich (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Delgiusto (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Di Mitri (Elettra-Sincrotrone Trieste S.C.p.A.), Bruno Diviacco (Elettra-Sincrotrone Trieste S.C.p.A.), William Fawley (Elettra-Sincrotrone Trieste S.C.p.A.), Mario Ferianis (Elettra-Sincrotrone Trieste S.C.p.A.), Giulio Gaio (Elettra-Sincrotrone Trieste S.C.p.A.), Federico Gelmetti (Elettra-Sincrotrone Trieste S.C.p.A.), Dr Luca Giannessi (Elettra Sincrotrone Trieste and Istituto Nazionale di Fisica Nucleare), Gabor Kurdi (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Lonza (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Malvestuto (Elettra-Sincrotrone Trieste S.C.p.A.), Michele Manfredda (Elettra-Sincrotrone Trieste S.C.p.A.), Claudio Masciovecchio (Elettra-Sincrotrone Trieste S.C.p.A.), Ivaylo Nikolov (Elettra-Sincrotrone Trieste S.C.p.A.), Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.), Kevin Prince (Elettra-Sincrotrone Trieste S.C.p.A.), Emiliano Principi (Elettra-Sincrotrone Trieste S.C.p.A.), Primoz Rebernik Ribic (Elettra-Sincrotrone Trieste S.C.p.A.), Claudio Scafuri (Elettra-Sincrotrone Trieste S.C.p.A.), Nuaman Shafqat (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Sigalotti (Elettra-Sincrotrone Trieste S.C.p.A.), Alberto Simoncig (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.), Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.), Luca Sturari (Elettra-Sincrotrone Trieste S.C.p.A.), Mauro Trovo (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Veronese (Elettra-Sincrotrone Trieste S.C.p.A.), Roberto Visintini (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Zangrando (Elettra-Sincrotrone Trieste S.C.p.A.), Takashi Tanaka (RIKEN SPring-8 Center), Gregory Penn (Lawrence Berkeley National Laboratory), Giovanni Perosa (University of Trieste, Elettra Sincrotrone Trieste), Filippo Sottocorona (University of Trieste, Elettra Sincrotrone Trieste)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

ABSTRACT: FERMI is implementing a development plan to keep the facility in a world-leading position on the base of the requests coming from the user community and the advises from the Scientific Advisory Council and the Machine Advisory Committee. The ultimate goal of this plan consists in doubling the maximum photon energy available and in reducing the pulse duration below the characteristic...

Prof. Makoto Asakawa (Kansai University), Prof. Soichiro Yamaguchi (Kansai University), Prof. Makoto Nakajima (Osaka University), Mr Yuga Karaki (Kansai University), Mr Hiroki Matsubara (Kansai University), Mr Yuki Miyajima (Kansai University), Mr Ryosuke Michishita (Kansai University), Mr Tomohiro Shirai (Kansai University), Mr Ryosuke Horii (Kansai University), Ms Shizuki Yoshimatsu (Kansai University)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

The biggest benefit of DC photoelectron-gun driven by the sub-picosecond laser is that such type of guns can be operated with the current density much higher than the Child’s low limitation. We demonstrated 0.3 nC bunch generation by irradiating a 100 fs Ti:sapphire laser focused to 0.1 square-cm area onto a tangsten photocathode installed in a diode type 40 kV DC gun. The drawback is the...

Jiawei Yan (European XFEL GmbH), Gianluca Geloni (European XFEL GmbH)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

The generation of x-ray pulses carrying orbital angular momentum from an x-ray free-electron laser (FEL) has attracted considerable attention due to the ability to directly change atomic states and develop new material characterization techniques. In this contribution, we report a new method for generating intense x-ray vortices. The method is based on the widely used self-amplified...

MyungHoon Cho (Pohang Accelerator Laboratory)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Nearly fully coherent hard X-ray self-seeded (HXRSS) free-electron laser (FEL) pulses with an unprecedented peak-brightness and a narrow spectrum using the forward Bragg-diffraction (FBD) monochromator has been provided. We have achieved outstanding performance of HXRSS FEL over photon energy range covering from 3.5 keV to 14.6 keV at PAL-XFEL. Furthermore, an averaged energy of seed FEL of...

Prof. Ido Kaminer (Israel Institute of Technology), Prof. Michael Krueger (Israel Institute of Technology), Dr Yiming Pan (Israel Institute of Technology)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Attosecond laser pulses in the extreme ultraviolet/soft X-ray (XUV/SXR) spectral regions are presently available for attosecond pump-probe spectroscopy and extreme ultraviolet lithography for chip manufacturing, ultrafast atomic-scale microscopy, and nonlinear X-ray optics. There are two main approaches to produce attosecond light pulses: high-harmonic generation (HHG) in gas-phase or...

Hao Sun (Shanghai Institute of Applied Physics), Georgia Paraskaki (Deutsches Elektronen-Synchrotron), Bart Faatz (Shanghai Advanced Research Institute), Chao Feng (Shanghai Advanced Research Institute), Bo Liu (Shanghai Advanced Research Institute)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

External seeding techniques like high-gain harmonic generation (HGHG) and echo-enabled harmonic generation (EEHG) have been proven to be able to generate fully coherent radiation in the EUV and X-ray range. However, towards seeding at a high repetition rate, the repetition rate of current laser systems with sufficient power for seeding is limited to the kilohertz range. One attractive solution...

Tino Lang (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Samuel Hartwell (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Jiaan Zheng (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Ingmar Hartl (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Lucas Schaper (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Mehdi Mohammad Kazemi (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Mr Nhat-Phi Hoang (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Eugenio Ferrari (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Within the FLASH2020+ project the FLASH VUV/XUV FEL facility at DESY (Hamburg, Germany) is currently undergoing a major upgrade to become the first high repetition rate, fully coherent FEL light source worldwide [1]. To reach this goal, one of the two in parallel operated FEL branches will be seeded at a fixed wavelength at 343 nm in a first step (SEED 1) and tunable between 297 nm to 317 nm...

Arie Irman (Helmholtz-Zentrum Dresden-Rossendorf)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Beam-driven plasma wakefield accelerators (PWFAs) offer a unique regime for the generation and acceleration of high-quality electron beams to multi-GeV energies. Here we present an innovative hybrid staging approach, deploying electron beams generated in a laser-driven wakefield accelerator (LWFA) as drivers for a PWFA, integrated in a particularly compact setup. This scenario exploits the...

Georgia Paraskaki (Deutsches Elektronen-Synchrotron), Lucas Schaper (Deutsches Elektronen-Synchrotron), Evgeny Schneidmiller (Deutsches Elektronen-Synchrotron), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

External seeding schemes allow the generation of stable and fully coherent free electron laser (FEL) radiation but can be limited in repetition rates in orders of tens of Hz. This limitation is mainly posed by limited average power of the seed lasers that are required to provide hundreds of MW peak power to modulate the electron bunches. An optical-klystron-based high gain harmonic generation...

Pardis Niknejadi (Deutsches Elektronen-Synchrotron), Sven Ackermann (Deutsches Elektronen-Synchrotron), Philipp Amstutz (Deutsches Elektronen-Synchrotron), Martin Dohlus (Deutsches Elektronen-Synchrotron), Eugenio Ferrari (Deutsches Elektronen-Synchrotron), Tino Lang (Deutsches Elektronen-Synchrotron), Georgia Paraskaki (Deutsches Elektronen-Synchrotron), Lucas Schaper (Deutsches Elektronen-Synchrotron), Evgeny Schneidmiller (Deutsches Elektronen-Synchrotron), Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Mathias Vogt (Deutsches Elektronen-Synchrotron), Mikhail Yurkov (Deutsches Elektronen-Synchrotron), Wolfgang Hillert (University of Hamburg), Fabian Pannek (University of Hamburg), Dmitrii Samoilenko (University of Hamburg), Sven Reiche (Paul Scherrer Institut), Francesca Curbis (Lund University), Mihai Pop (Lund University)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

A tunable and multicolor light source with near Fourier-limited pulses, controlled delay, and fully coherent beam with precisely adjustable phase profiles enables state-of-the-art measurements and studies of femtosecond dynamic processes with high elemental sensitivity and contrast. The start-to-end simulations efforts aim to take advantage of the available global pool of software and past and...

Driss Oumbarek Espinos (Osaka University)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

The LAPLACIAN (Laser Acceleration Platform as a Coordinated Innovation Anchor) experimental facility inside the MIRAI project framework is the Japanese answer to the global effort for the development of compact accelerators based on laser plasma acceleration (LPA) for its application to free electron laser (FEL). Situated in the SPRING-8 site, LAPLACIAN aims for the generation of X-ray FEL...

Dr Alexandre Trisorio (Paul Scherrer Institut), Dr Sven Reiche (Paul Scherrer Institut), Dr Chris Arrell (Paul Scherrer Institut), Adrian Cavalieri (Paul Scherrer Institut), Dr Andreas Dax (Paul Scherrer Institut), Dr Chris Michael Deutschendorf (Paul Scherrer Institut), Dr Philipp Dijkstal (Paul Scherrer Institut), Mr Edwin Divall (Paul Scherrer Institut), Dr Romain Ganter (Paul Scherrer Institut), Rasmus Ischebeck (Paul Scherrer Institut), Dr Nicole Hiller (Paul Scherrer Institut), Dr Martin Huppert (Paul Scherrer Institut), Dr Pavle Juranic (Paul Scherrer Institut), Dr Stephan Neppl (Paul Scherrer Institut), Dr Eduard Prat (Paul Scherrer Institut), Cezary Sydlo (Paul Scherrer Institut), Dr Carlo Vicario (Paul Scherrer Institut), Dr Didier Voulot (Paul Scherrer Institut), Gabriel Aeppli (Paul Scherrer Institut), Dr Eugenio Ferrari (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

In the scope of the HERO ERC project, we are implementing a laser-based seeding scheme at the SwissFEL soft X-ray Athos beamline to generate fully coherent X-ray FEL pulses. With this perspective, we designed and built a new laser facility. It consists of a terawatt-class, femtosecond laser system based on Titanium Sapphire technology with wavelength tuning capability, an optical transfer line...

Joseph Duris (SLAC National Accelerator Laboratory)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Shaping techniques traditionally used to produce few femtosecond and even sub femtosecond soft X-ray FEL pulses at LCLS do not scale well to high repetition rates. Here we present the progress of the LCLS-II X-ray temporal shaping project which uses infrared and ultraviolet picosecond lasers to shape the electron beam of the LCLS-II superconducting linac. Quickly switching these shaping lasers...

Mikhail Krasilnikov (Deutsches Elektronen-Synchrotron DESY at Zeuthen)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

The slice energy spread of the electron beam is one of the key parameters for high performance of linac-driven free electron lasers (FELs). The simulated uncorrelated energy spread in modern XFEL photoinjectors with beam energies of many tens of MeV is on the order of a few keV or even less. Thus, accurate measurement of the slice energy spread is not trivial. Two recent studies on high energy...

Giuseppe Penco (Elettra-Sincrotrone Trieste S.C.p.A.), Alberto Simoncig (Elettra-Sincrotrone Trieste S.C.p.A.), Alessandro Gessini (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Brynes (Elettra-Sincrotrone Trieste S.C.p.A.), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Alexander Demidovich (Elettra-Sincrotrone Trieste S.C.p.A.), Antonio Caretta (Elettra-Sincrotrone Trieste S.C.p.A.), Boris Vodungbo (Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCPMR, Paris 75005, France), Carlo Callegari (Elettra-Sincrotrone Trieste S.C.p.A.), Carlo Spezzani (Elettra-Sincrotrone Trieste S.C.p.A.), Claudio Masciovecchio (Elettra-Sincrotrone Trieste S.C.p.A.), Dario De Angelis (Elettra-Sincrotrone Trieste S.C.p.A.), Eléonore Roussel (Laboratoire de Physique des Lasers, Atomes et Molécules), Emanuele Pedersoli (Elettra-Sincrotrone Trieste S.C.p.A.), Emiliano Principi (Elettra-Sincrotrone Trieste S.C.p.A.), Emmanuelle Jal (Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCPMR, Paris 75005, France), Filippo Bencivenga (Elettra-Sincrotrone Trieste S.C.p.A.), Filippo Sottocorona (University of Trieste, Elettra Sincrotrone Trieste), Flavio Capotondi (Elettra-Sincrotrone Trieste S.C.p.A.), Gabor Kurdi (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni De Ninno (Elettra-Sincrotrone Trieste S.C.p.A.), Giovanni Perosa (University of Trieste, Elettra Sincrotrone Trieste), Giulio Gaio (Elettra-Sincrotrone Trieste S.C.p.A.), Ivaylo Nikolov (Elettra-Sincrotrone Trieste S.C.p.A.), Jan Luning (Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCPMR, Paris 75005, France), Laura Badano (Elettra-Sincrotrone Trieste S.C.p.A.), Laura Foglia (Elettra-Sincrotrone Trieste S.C.p.A.), Luca Giannessi (Elettra-Sincrotrone Trieste S.C.p.A.), Marcel Hennes (Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCPMR, Paris 75005, France), Marco Malvestuto (Elettra-Sincrotrone Trieste S.C.p.A.), Marco Zangrando (Elettra-Sincrotrone Trieste S.C.p.A.), Mauro Trovo (Elettra-Sincrotrone Trieste S.C.p.A.), Michele Manfredda (Elettra-Sincrotrone Trieste S.C.p.A.), Miltcho Danailov (Elettra-Sincrotrone Trieste S.C.p.A.), Paolo Cinquegrana (Elettra-Sincrotrone Trieste S.C.p.A.), Pelli Cresi Stefano (Elettra-Sincrotrone Trieste S.C.p.A.), Primoz Rebernik Ribic (Elettra-Sincrotrone Trieste S.C.p.A.), Riccardo Mincigrucci (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Di Mitri (Elettra-Sincrotrone Trieste S.C.p.A.), Simone Spampinati (Elettra-Sincrotrone Trieste S.C.p.A.), Valentin Chardonnet (Sorbonne Université, CNRS, Laboratoire de Chimie Physique – Matière et Rayonnement, LCPMR, Paris 75005, France), Benedikt Roesner (Paul Scherrer Institut), Christian David (Paul Scherrer Institut), Panagiota Bougiatioti (Paul Scherrer Institut), Maurizio Sacchi (Synchrotron Soleil), Simone Dal Zilio (CNR-IOM, Istituto Officina dei Materiali)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The advent of free electron lasers (FELs) in the soft and hard X-ray spectral region has opened the possibility to probe electronic, magnetic and structural dynamics, in both diluted and condensed matter samples, with femtosecond time resolution. In particular, FELs strongly enhanced the capabilities of several analytical techniques, which took advantage of the high degree of transverse...

Christopher Hall (RadiaSoft LLC)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The FAST-GREENS FEL experiment is aimed at demonstrating extraction efficiencies of greater than 10%. This is accomplished with a high-power seed laser and an aggressively tapered undulator to compensate for the energy loss in the electron beam. A proof of concept experiment will be conducted at the Fermilab Accelerator Science and Technology Facility (FAST) using an undulator specifically...

Tianyun Long (State Key Laboratory of Nuclear Physics and Technology), Ye Chen (Deutsches Elektronen-Synchrotron), Winfried Decking (Deutsches Elektronen-Synchrotron), Shan Liu (Deutsches Elektronen-Synchrotron), Najmeh Mirian (Deutsches Elektronen-Synchrotron), Weilun Qin (Deutsches Elektronen-Synchrotron), Jiawei Yan (European XFEL GmbH), Senlin Huang (State Key Laboratory of Nuclear Physics and Technology), Kexin Liu (State Key Laboratory of Nuclear Physics and Technology), Gianluca Geloni (European XFEL GmbH)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

Phase-locked pulses are important for coherent control experiments. Here we present theoretical analyses and start-to-end simulation results for the generation of phase-locked pulses using the Hard X-ray Self-Seeding (HXRSS) system at the European XFEL. As proposed in Ref. [1], the method is based on a combination of self-seeding and fresh-slice lasing techniques. However, at variance with...

Dr David Juarez-Lopez (Deutsches Elektronen-Synchrotron), Dr Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Dr Laura Monaco (Istituto Nazionale di Fisica Nucleare), Dr Sven Lederer (Deutsches Elektronen-Synchrotron), Dr Daniele Sertore (Istituto Nazionale di Fisica Nucleare), Dr Frank Brinker (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

The photoinjectors of FLASH at DESY (Hamburg, Germany) and the European XFEL are operated by laser driven RF-guns. In both facilities cesium telluride photocathodes are successfully used since several years. We present recent data on the lifetime, quantum efficiency (QE), and dark current of the photocathodes currently in operation. In addition we present recent design changes in the...

Tim de Raadt (Technische Universiteit Eindhoven)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

We are developing an ultrafast and Ultracold Electron Source (UCES), based on near-threshold, two-step, femtosecond photoionization of laser-cooled rubidium gas in a grating Magneto Optical Trap (MOT). This source delivers stable ultrafast electron bunches with a unique combination of high bunch charge and low transverse emittance ~1.9 nm·rad, demonstrating the cold electron temperature ~25...

Arjun Radha Krishnan (TU Dortmund University)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

At DELTA, a 1.5-GeV electron storage ring operated by the TU Dortmund University, the seeding scheme CHG (coherent harmonic generation), the counterpart to HGHG (high-gain harmonic generation) without FEL gain, is used to provide ultrashort pulses in the femtosecond regime at harmonics of the seedlaser wavelength. To provide higher harmonics and thus shorter wavelengths, it is planned to...

Bin Zhang (University of Tel Aviv)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

We present a theory for free electrons interaction with radiation in both classical and quantum regimes and delineate their transition, based on a model of quantum electron wavepacket (QEW). The theory has general validity for a wide range of free electron interaction and radiation sources, including Free Electron Lasers, Cerenkov radiation, and transition radiation. We exemplify our analysis...

Dr Ye Chen (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

A numerical study is carried out on the quality of the electron bunch train produced from a photoinjector based on a frequency-detuning dependent gun coupler kick. The impact of the kick on the emittance of the bunch train is modelled via three-dimensional electromagnetic field maps calculated at detuned frequencies of the gun cavity within
long radio-frequency pulses. Beam dynamics...

Paolo Cinquegrana (Elettra-Sincrotrone Trieste S.C.p.A.)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The local laser synchronization is known to be of high importance for Free Electron facilities, affecting both machine performance and pump-probe FEL-external laser experiments. So, there has been a continuous effort to improve the timing jitter of all machine lasers. One of the main contributions to the overall timing jitter comes from the locking of the local laser oscillators to the...

Mikhail Krasilnikov (Deutsches Elektronen-Synchrotron DESY at Zeuthen)
8/23/22, 4:00 PM
Electron sources
Contributed Poster

A new generation of high-gradient normal conducting 1.3 GHz RF gun with 1% duty factor was developed to provide a high-quality electron source for superconducting linac driven free-electron lasers like FLASH and European XFEL. Compared to the Gun4 series, Gun5 aims for a ~50% longer RF pulse length (RF pulse duration of up to 1 ms at 10 Hz repetition rate) combined with high gradients (up to...

Georgi Georgiev (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Prach Boonpornprasert (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Mikhail Krasilnikov (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Xiangkun Li (Deutsches Elektronen-Synchrotron DESY at Zeuthen), Wolfgang Hillert (University of Hamburg)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

A THz FEL is in preparation at PITZ as a proof-of-principle experiment for a high power and high repetition rate THz source and as an option for THz-driven experiments at the European XFEL. Some of these experiments require excellent coherence and CEP stable THz pulses. In SASE regime the coherent properties of the FEL radiation are limited. A seeding scheme can be used instead of SASE to...

Lily Berman (University of Strathclyde)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Plasma photocathode injectors may enable electron beams with normalised emittance at the nm-rad level from a Plasma Wakefield Acceleration (PWFA) stage [1]. These electron beams typically have kA-level peak currents leading to ultrahigh 5D brightness beams with the potential to drive advanced light sources [1]. The feasibility of the plasma photocathode was demonstrated at FACET-I at SLAC [2]....

Shan You Teng (Department of Physics, National Central University), Shih-Hung Chen (Department of Physics, National Central University), Dr An-ping Lee (National Synchrotron Radiation Research Center), Dr Ming-Chang Chou (National Synchrotron Radiation Research Center), Dr Hsin-Pai Hsueh (National Synchrotron Radiation Research Center), Dr Wei-Yuan Chiang (National Synchrotron Radiation Research Center), Wai-Keung Lau (National Synchrotron Radiation Research Center), Mr Pao Ting Lin (National Tsing Hua University)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

S.Y. Teng(1,2), S.H. Chen(1), W.Y. Chiang(2), M.C. Chou(2), H.P. Hsueh(2), W.K. Lau(2), A.P. Lee(2), P.T. Lin(3)
1 Department of Physics, NCU, Taoyuan, Taiwan
2 NSRRC, Hsinchu, Taiwan
3 Department of Engineering and System Science, NTHU, Hsinchu, Taiwan.

Intense coherent THz radiation has been generated from an 18-period, hybrid-type U100 planar undulator as it is driven by short...

Arjun Radha Krishnan (TU Dortmund University), Benedikt Büsing (TU Dortmund University), Shaukat Khan (TU Dortmund University), Carsten Mai (TU Dortmund University), Arne Held (TU Dortmund University), Zohair Usfoor (TU Dortmund University), Vivek Vijayan (TU Dortmund University)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

At the 1.5 GeV synchrotron light source DELTA operated by the TU Dortmund University, the short-pulse facility employs the seeding scheme coherent harmonic generation (CHG) to produce ultrashort pulses in the vacuum ultraviolet and terahertz regime. This is achieved via a laser-induced electron energy modulation and a subsequent microbunching in a dispersive section. The spectro-temporal...

Jurjen Couperus Cabadag (Helmholtz-Zentrum Dresden-Rossendorf), Stefan Bock (Helmholtz-Zentrum Dresden-Rossendorf), Yen-Yu Chang (Helmholtz-Zentrum Dresden-Rossendorf), Alexander Debus (Helmholtz-Zentrum Dresden-Rossendorf), Rene Gebhardt (Helmholtz-Zentrum Dresden-Rossendorf), Amin Ghaith (Helmholtz-Zentrum Dresden-Rossendorf), Uwe Helbig (Helmholtz-Zentrum Dresden-Rossendorf), Arie Irman (Helmholtz-Zentrum Dresden-Rossendorf), Alexander Koehler (Helmholtz-Zentrum Dresden-Rossendorf), Maxwell LaBerge (Helmholtz-Zentrum Dresden-Rossendorf), Richard Pausch (Helmholtz-Zentrum Dresden-Rossendorf), Thomas Püschel (Helmholtz-Zentrum Dresden-Rossendorf), Ulrich Schramm (Helmholtz-Zentrum Dresden-Rossendorf), Mr Susanne Schöbel (Helmholtz-Zentrum Dresden-Rossendorf), Dr Klaus Steiniger (Helmholtz-Zentrum Dresden-Rossendorf), Patrick Ufer (Helmholtz-Zentrum Dresden-Rossendorf), Omid Zarini (Helmholtz-Zentrum Dresden-Rossendorf), Eléonore Roussel (Laboratoire de Physique des Lasers, Atomes et Molécules), Marie-Emmanuelle Couprie (Synchrotron Soleil), Marie Labat (Synchrotron Soleil), Michael Downer (The University of Texas at Austin)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

We report on the operation of the DRACO Laser Driven electron source for stable multi-day operation for FEL applications. The nC-class accelerator delivers charge densities around 10 pC/MeV , <1 mrad rms divergence at energies up to 0.5 GeV and peak currents of over 10 kA [1].
Precise characterisation is paramount for controlled operation, including: spectrally resolved charge diagnostic,...

Andreas Thiel (University of Hamburg), Dmitrii Samoilenko (University of Hamburg), Enrico Allaria (Elettra-Sincrotrone Trieste S.C.p.A.), Eugenio Ferrari (Deutsches Elektronen-Synchrotron), Fabian Pannek (University of Hamburg), Georgia Paraskaki (Deutsches Elektronen-Synchrotron), Ingmar Hartl (Deutsches Elektronen-Synchrotron), Jiaan Zheng (Deutsches Elektronen-Synchrotron), Johann Zemella (Deutsches Elektronen-Synchrotron), Dr Lucas Schaper (Deutsches Elektronen-Synchrotron), Margarit Asatrian (University of Hamburg), Dr Markus Tischer (Deutsches Elektronen-Synchrotron), Martin Beye (Deutsches Elektronen-Synchrotron), Dr Mehdi Mohammad Kazemi (Deutsches Elektronen-Synchrotron), Dr Pardis Niknejadi (Deutsches Elektronen-Synchrotron), Pavel Vagin (Deutsches Elektronen-Synchrotron), Samuel Hartwell (Deutsches Elektronen-Synchrotron), Dr Sheida Mahmoodi (Deutsches Elektronen-Synchrotron), Siegfried Schreiber (Deutsches Elektronen-Synchrotron), Dr Sven Ackermann (Deutsches Elektronen-Synchrotron), Tino Lang (Deutsches Elektronen-Synchrotron), Wolfgang Hillert (University of Hamburg)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

In the framework of the FLASH2020+ project, the FLASH1 beamline will be upgraded to deliver seeded FEL pulses for users. This upgrade will be achieved by combining high gain harmonic generation and echo-enabled harmonic generation with a wide-range wavelength-tunable seed laser, to efficiently cover the 60-4 nm wavelength range. The undulator chain will also be refurbished entirely using new...

Filippo Sottocorona (Università degli Studi di Trieste), Giovanni Perosa (Università degli Studi di Trieste)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

FEL basic theory indicates that the output wavelength of a seeded FEL operated in the HGHG configuration is determined by the wavelength of the seed laser and light is emitted when undulators are tuned to one of the harmonics of the seed laser. In a more realistic case, when taking into account the electron beam imperfections and the finite bandwidths of the seed and of the amplification...

Marc Guetg (Deutsches Elektronen-Synchrotron), Gianluca Geloni (European XFEL GmbH), Dr Ye Chen (Deutsches Elektronen-Synchrotron), Evgeny Schneidmiller (Deutsches Elektronen-Synchrotron), Christoph Lechner (European XFEL GmbH), Jiawei Yan (European XFEL GmbH), Svitozar Serkez (European XFEL GmbH), Christoph Heyl (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

Attosecond pulse production is an important development focus for most major FEL facilities. Chirp/taper and eSASE schemes, both of which will shorten the pulses well below the femto-second level for both hard and soft x-rays, are proposed for implementation at EuXFEL. As a high repetition rate super conducting linac that feeds three 200m long undulator lines for parallel operation, EuXFEL...

Johann Zemella (Deutsches Elektronen-Synchrotron), Mathias Vogt (Deutsches Elektronen-Synchrotron)
8/23/22, 4:00 PM
Seeded FEL
Contributed Poster

The 2nd stage of the FLASH2020+ project at DESY will be an upgrade of the FLASH1 beamline to enable HGHG and EEHG seeding with two modulator-chicane stages, and a radiator section with 11 Apple-III undulators to enable FEL radiation with controllable polarization. A key feature of FLASH, namely the capability of providing several thousand FEL pulses in the extreme UV and soft X-ray must not be...

Michael Gerasimov (Ariel University)
8/23/22, 4:00 PM
Novel acceleration and FEL concepts
Contributed Poster

A unique platform for a Tera Hertz Transmission Line design for a superradiant FEL is present. The smart line is controlled by Artificial Intelligence (AI) intended for a wide tunable broad-spectrum THz radiation propagation. The main goal is to transfer radiation in the most efficient way. A 3D analysis and diagnostic of radiation space-frequency tool was developed. The AI changes the...