Status of Projects and Facilities
Paper Title Page
MOB01
Operation Status and Future Perspective of Warm XFEL  
 
  • H. Tanaka
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
 
  The world first XFEL facility, LCLS adopted a warm (normal conducting) S-band RF technology to constantly provide high quality electron beams with high energy for generating stable SASE-based XFELs. Following the success of LCLS, SACLA, PAL-XFEL and SwissFEL based on the warm RF technologies of S- or C-bands were constructed and have started their user operations or test experiments via the beam-commissioning phase. These warm XFEL facilities have developed various advanced FEL schemes making high performance XFELs available for user experiments. They have been continuously upgrading the operations for expanding experimental opportunities and potentiality. This talk will overview the current operational status of warm XFEL facilities and present future perspectives compared with cold (super-conducting) XFEL facilities.  
slides icon Slides MOB01 [19.294 MB]  
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MOB02
Overview on Future Continuous Wave X-Ray Free Electron Lasers  
 
  • H. Weise
    DESY, Hamburg, Germany
 
  FELs based on superconducting accelerators offer a photon beam time structure being flexible in pulse pattern, with the electron bunch properties tailored to effectively meet user requirements. While DESY’s long time operated FLASH facility as well as the in 2017 commissioned European XFEL in the Hamburg region, Germany, are operated in pulsed mode with bunch trains of up to 600 µs and bunch repetition rates of up to 4.5 MHz, new facilities aim for continuous wave (cw) RF operation allowing bunch repetition rates of typically 100 kHz to 1 MHz. The used accelerator modules are still using the so-called TESLA technology. Minor but essential modifications in the accelerating structure design bring the cryogenic load to a reasonable and acceptable level. The upcoming LCLS-II, being under construction at SLAC, U.S., uses so-called Nitrogen doped accelerating structures. The recently started SHINE project at Shanghai, China, will adopt similar ideas. For a possible European XFEL upgrade towards cw, also so-called large grain Niobium is an option. The presentation will give an overview about R&D towards the great future of X-ray FELs. Activities in all three regions will be described.  
slides icon Slides MOB02 [12.308 MB]  
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THP013 User Operation of Sub-Picosecond THz Coherent Transition Radiation Parasitic to a VUV FEL 621
 
  • S. Di Mitri, N. Adhlakha, E. Allaria, L. Badano, G. De Ninno, P. Di Pietro, G. Gaio, L. Giannessi, G. Penco, A. Perucchi, P. Rebernik Ribič, E. Roussel, S. Spampinati, C. Spezzani, M. Trovò, M. Veronese
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • G. De Ninno
    University of Nova Gorica, Nova Gorica, Slovenia
  • L. Giannessi
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • S. Lupi
    Coherentia, Naples, Italy
  • S. Lupi
    Sapienza University of Rome, Roma, Italy
  • F. Piccirilli
    IOM-CNR, Trieste, Italy
  • E. Roussel
    PhLAM/CERLA, Villeneuve d’Ascq, France
  • E. Roussel
    PhLAM/CERCLA, Villeneuve d’Ascq Cedex, France
 
  Coherent transition radiation is enhanced in intensity and extended in frequency spectral range by the electron beam manipulation in the beam dump beam line of the FERMI FEL, by exploiting the interplay of coherent synchrotron radiation instability and electron beam optics [1]. Experimental observations at the TeraFERMI beamline [2] confirm intensity peaks at around 1 THz and extending up to 8.5 THz, for up to 80 µJ pulse energy integrated over the full bandwidth. By virtue of its implementation in an FEL beam dump line, this work might stimulate the development of user-oriented multi-THz beamlines parasitic and self-synchronized to VUV and X-ray FELs.
[1] S. Di Mitri et al., Scientific Reports, 8, 11661 (2018).
[2] A. Perucchi et al., Synch. Rad. News 4, 30 (2017).
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP013  
About • paper received ※ 29 July 2019       paper accepted ※ 27 August 2019       issue date ※ 05 November 2019  
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THP030 An Updated Design of the NSRRC Seeded VUV Free Electron Laser Test Facility 651
 
  • W.K. Lau, C.K. Chan, C.-H. Chang, C.-C. Chang, L.-H. Chang, C.H. Chen, M.C. Chou, P.J. Chou, F.Z. Hsiao, K.T. Hsu, H.P. Hsueh, K.H. Hu, C.-S. Hwang, J.-Y. Hwang, J.C. Jan, C.K. Kuan, A.P. Lee, M.-C. Lin, G.-H. Luo, K.L. Tsai
    NSRRC, Hsinchu, Taiwan
  • A. Chao, J. Wu
    SLAC, Menlo Park, California, USA
  • S.Y. Teng
    NTHU, Hsinchu, Taiwan
 
  In this report, we present an updated design of the facility which is a 200 nm seeded, HGHG FEL driven by a 250 MeV high brightness electron linac system with dogleg bunch compressor for generation of ultrashort intense coherent radiation in the vacuum ultraviolet region. It employs a 10-periods helical undulator for enhancement of beam energy modulation and a helical undulator of 20 mm period length as the radiator (i.e. THU20) to produce hundreds of megawatts radiation with wavelength as short as 66.7 nm. An optional planar undulator can be added to generate odd harmonics (e.g. 22.2 nm, 13.3 nm etc.) of the fundamental. The facility layout and expected FEL output performance is reported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP030  
About • paper received ※ 20 August 2019       paper accepted ※ 29 August 2019       issue date ※ 05 November 2019  
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THP066 XARA: X-Band Accelerator for Research and Applications 715
 
  • D.J. Dunning, L.S. Cowie, J.K. Jones
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • L.S. Cowie, J.K. Jones
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • L.S. Cowie
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
 
  XARA (X-band Accelerator for Research and Applications) is a proposal for a compact ~1 GeV/c accelerator to produce attosecond light pulses in the EUV to soft X-ray region. It is under consideration as a potential future upgrade to the CLARA facility at Daresbury Laboratory, utilising high-performance X-band RF technology to increase the electron beam momentum from 250 MeV/c. Emerging techniques for generating single-cycle undulator light [1] would give access to attosecond timescales, enabling studies of ultra-fast dynamics, while also being very compact. XARA would also enhance the existing capabilities for accelerator science R&D by incorporating X-band development and increasing the electron beam momentum for novel acceleration studies.
[1] Alan Mak et al., Rep. Prog. Phys. 82 025901 (2019)
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP066  
About • paper received ※ 20 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
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THP074 FLASH: The Pioneering XUV and Soft X-Ray FEL User Facility 734
 
  • K. Honkavaara, S. Schreiber
    DESY, Hamburg, Germany
 
  FLASH, the free-electron laser (FEL) at DESY (Hamburg) started user operation in summer 2005. It delivers high peak and average brilliance XUV and soft X-ray FEL radiation to photon experiments. Nowadays, FLASH has a 1.25 GeV superconducting linac, and two undulator beamlines, which are operated simultaneously. This paper provides an overview of its evolution from a test facility for superconducting accelerator technology to a full-scale FEL user facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP074  
About • paper received ※ 20 August 2019       paper accepted ※ 27 August 2019       issue date ※ 05 November 2019  
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THP078 Status of the CompactLight Design Study 738
 
  • G. D’Auria, S. Di Mitri, R.A. Rochow
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • M. Aicheler
    HIP, University of Helsinki, Finland
  • A. Aksoy
    Ankara University Institute of Accelerator Technologies, Golbasi, Turkey
  • D. Alesini, M. Bellaveglia, B. Buonomo, F. Cardelli, M. Croia, M. Diomede, M. Ferrario, A. Gallo, A. Giribono, L. Piersanti, J. Scifo, B. Spataro, C. Vaccarezza
    INFN/LNF, Frascati, Italy
  • R. Apsimon, G. Burt, A. Castilla
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • J.M. Arnesano, F. Bosco, L. Ficcadenti, A. Mostacci, L. Palumbo
    Sapienza University of Rome, Rome, Italy
  • A. Bernhard, J. Gethmann
    KIT, Karlsruhe, Germany
  • M. Calvi, T. Schmidt, K. Zhang
    PSI, Villigen PSI, Switzerland
  • H.M. Castañeda Cortés, J.A. Clarke, D.J. Dunning, N. Thompson
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • A.W. Cross, L. Zhang
    USTRAT/SUPA, Glasgow, United Kingdom
  • G. Dattoli, F. Nguyen, A. Petralia
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • R.T. Dowd, D. Zhu
    AS - ANSTO, Clayton, Australia
  • D. Esperante Pereira, J. Fuster, D. Gonzalez-Iglesias
    IFIC, Valencia, Spain
  • W. Fang
    SINAP, Shanghai, People’s Republic of China
  • A. Faus-Golfe, Y. Han
    LAL, Orsay, France
  • E.N. Gazis, N. Gazis
    National Technical University of Athens, Athens, Greece
  • R. Geometrante, M. Kokole
    KYMA, Trieste, Italy
  • B. Gimeno
    UVEG, Burjasot (Valencia), Spain
  • V.A. Goryashko, M. Jacewicz, R.J.M.Y. Ruber
    Uppsala University, Uppsala, Sweden
  • R. Hoekstra
    ARCNL, Amsterdam, The Netherlands
  • X.J.A. Janssen, J.M.A. Priem
    VDL ETG, Eindhoven, The Netherlands
  • A. Latina, X. Liu, C. Rossi, D. Schulte, S. Stapnes, X.W. Wu, W. Wuensch
    CERN, Geneva, Switzerland
  • O.J. Luiten, P.H.A. Mutsaers, X.F.D. Stragier
    TUE, Eindhoven, The Netherlands
  • J. Marcos, E. Marín, R. Muñoz Horta, F. Pérez
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • Z. Nergiz
    Ankara University, Faculty of Sciences, Ankara, Turkey
  • L.J.R. Nix
    University of Strathclyde, Glasgow, United Kingdom
  • E. Tanke, E. Trachnas
    ESS, Lund, Sweden
  • G. Taylor
    The University of Melbourne, Melbourne, Victoria, Australia
 
  Funding: This project has received funding from the European Union’s Horizon 2020 Research and Innovation Programme under Grant Agreement No. 777431.
CompactLight (XLS) is an International Collaboration of 24 partners and 5 third parties, funded by the European Union through the Horizon 2020 Research and Innovation Programme. The main goal of the project, which started in January 2018 with a duration of 36 months, is the design of an hard X-ray FEL facility beyond today’s state of the art, using the latest concepts for bright electron photo-injectors, high-gradient accelerating structures, and innovative short-period undulators. The specifications of the facility and the parameters of the future FEL are driven by the demands of potential users and the associated science cases. In this paper we will give an overview on the ongoing activities and the major results achieved until now.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP078  
About • paper received ※ 19 August 2019       paper accepted ※ 29 August 2019       issue date ※ 05 November 2019  
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THP079 Status and Perspectives of the FERMI FEL Facility (2019) 742
 
  • L. Giannessi, E. Allaria, L. Badano, S. Bassanese, F. Bencivenga, C. Callegari, F. Capotondi, D. Castronovo, F. Cilento, P. Cinquegrana, M. Coreno, I. Cudin, G. D’Auria, M.B. Danailov, R. De Monte, G. De Ninno, P. Delgiusto, A.A. Demidovich, M. Di Fraia, S. Di Mitri, B. Diviacco, A. Fabris, R. Fabris, W.M. Fawley, M. Ferianis, L. Foglia, P. Furlan Radivo, G. Gaio, F. Gelmetti, F. Iazzourene, S. Krecic, G. Kurdi, M. Lonza, N. Mahne, M. Malvestuto, M. Manfredda, C. Masciovecchio, M. Milloch, R. Mincigrucci, N.S. Mirian, I. Nikolov, F.H. O’Shea, G. Penco, A. Perucchi, O. Plekan, M. Predonzani, K.C. Prince, E. Principi, L. Raimondi, P. Rebernik Ribič, F. Rossi, L. Rumiz, C. Scafuri, C. Serpico, N. Shafqat, P. Sigalotti, A. Simoncig, S. Spampinati, C. Spezzani, M. Svandrlik, M. Trovò, A. Vascotto, M. Veronese, R. Visintini, D. Zangrando, M. Zangrando
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
 
  FERMI is the seeded Free Electron Laser (FEL) user facility at the Elettra laboratory in Trieste, operating in the VUV to EUV and soft X-rays spectral range; the radiation produced by the seeded FEL is characterized by wavelength stability, low temporal jitter and longitudinal coherence in the range 100-4 nm. During 2018 a dedicated experiment has shown the potential of the Echo Enabled Harmonic Generation (EEHG) scheme [1] to cover most of this spectral range with a single stage cascade [2]. Such a scheme, combined to an increment of the beam energy and of the accelerator performances, could extend the FERMI operating range toward the oxygen k-edge. With this perspective, we present the development plans under consideration for the next 3 to 5 years. These include an upgrade of the linac and of the existing FEL lines, consisting in the conversion of FEL-1 first, and FEL-2 successively, into EEHG seeded FELs.
[1] G. Stupakov, Phys. Rev. Lett. 102, 74801 (2009)
[2] P. Rebernik et al., Nature Photonics https://doi.org/10.1038/s41566-019-0427-1
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP079  
About • paper received ※ 28 August 2019       paper accepted ※ 29 August 2019       issue date ※ 05 November 2019  
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THP081 PolFEL — New Facility in Poland 746
 
  • K. Szamota-Leandersson, P.J. Czuma, P. Krawczyk, J. Krzywiński, R. Nietubyć, M. Staszczak, J. Szewiński
    NCBJ, Świerk/Otwock, Poland
  • W. Bal, J. Poznański
    IBB, Warsaw, Poland
  • A. Bartnik, H. Fiedorowicz, K. Janulewicz, N. Palka
    MUT, Warsaw, Poland
  • J.K. Sekutowicz
    DESY, Hamburg, Germany
 
  Funding: European Regional Development Fund ’ Smart Growth
In 2018 funds for the free electron laser PolFEL project was received. PolFEL will be driven by cw operating superconducting linac with SRF electron source. PolFEL will generate THz, IR and VIS-VUV radiation in two beamlines, respectively. In the first one, with electron beam below 80 MeV, the THz/IR radiation source will be generated in permanent magnet supper-radiant undulator, delivering THz radiation in 0.5 to 6 THz range. In the second beam line with up to 180 MeV electrons, the VIS/VUV radiation will be generated in the SASE undulator delivering coherent radiation down to 55 nm wavelength in the third harmonic, with sub-100 fs pulse duration. At the moment, four end-stations are planned. Experiments will be equipped with dedicated Pump-Probe spectrometer system as well. In the project, also, the Inverse Compton Scattering experiment is planned. In this contribution we will describe PolFEL facility in more details.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP081  
About • paper received ※ 29 August 2019       paper accepted ※ 18 September 2019       issue date ※ 05 November 2019  
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THP084 Status of the Soft X-Ray Laser (SXL) Project at MAX IV Laboratory 749
 
  • F. Curbis, J. Andersson, L. Isaksson, M. Kotur, F. Lindau, E. Mansten, M.A. Pop, H. Tarawneh, P.F. Tavares, S. Thorin, S. Werin
    MAX IV Laboratory, Lund University, Lund, Sweden
  • S. Bonetti, A. Nilsson
    Stockholm University, Stockholm, Sweden
  • V.A. Goryashko
    Uppsala University, Uppsala, Sweden
  • P. Johnsson, W. Qin
    Lund University, Lund, Sweden
  • M. Larsson, P.M. Salén
    FYSIKUM, AlbaNova, Stockholm University, Stockholm, Sweden
  • J.A. Sellberg
    KTH Physics, Stockholm, Sweden
 
  Funding: The work is supported by Knut and Alice Wallenberg foundation.
A Soft X-ray Laser project (the SXL) aiming to produce FEL radiation in the range of 1 to 5 nm is currently in a conceptual design phase and a report on the design is expected to be delivered by March 2021. The FEL will be driven by the existing 3 GeV linac at MAX IV laboratory, which also serves as injector for the two storage rings. The science case has been pushed by a large group of mainly Swedish users and consists of experiments ranging from AMO physics to condensed matter, chemistry and imaging in life science. In this contribution, we will present the current conceptual design of the accelerator and the FEL operation modes together with a general overview of the beamline and experimental station. In particular design options for the FEL will be discussed in conjunction with the features of the electron beam from the MAX IV linac and the connection with the proposed experiments.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP084  
About • paper received ※ 21 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
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THP085 Status of Athos, the Soft X-Ray FEL Line of SwissFEL 753
 
  • R. Ganter, G. Aeppli, A. Al Haddad, J. Alex, C. Arrell, V.R. Arsov, S. Bettoni, C. Bostedt, H.-H. Braun, M. Calvi, T. Celcer, P. Craievich, R. Follath, F. Frei, N. Gaiffi, Z.G. Geng, C.H. Gough, M. Huppert, R. Ischebeck, H. Jöhri, P.N. Juranič, B. Keil, F. Löhl, F. Marcellini, G. Marinkovic, G.L. Orlandi, C. Ozkan Loch, M. Paraliev, L. Patthey, M. Pedrozzi, C. Pradervand, E. Prat, S. Reiche, T. Schietinger, T. Schmidt, K. Schnorr, C. Svetina, A. Trisorio, C. Vicario, D. Voulot, U.H. Wagner, A.C. Zandonella
    PSI, Villigen PSI, Switzerland
 
  The Athos line will cover the photon energy range from 250 to 1900 eV and will operate in parallel to the hard X-ray line Aramis of SwissFEL. The paper will describe the current layout of the Athos FEL line starting from the fast kicker magnet followed by the dogleg transfer line, the small linac and the 16 APPLE undulators. From there the photon beam passes through the photonics front end and the beamline optics before reaching the experimental stations AMO and FURKA. The focus of this contribution will be on the two bunch operation commissioning (two bunches in the same RF macropulse), which started in 2018, and the characterization of the major components like the APPLE X undulator UE38, the CHIC chicane and the dechirper. The Athos installation inside the tunnel is alternating with Aramis FEL user operation and the first lasing is planned for winter 2019 / 2020.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP085  
About • paper received ※ 30 July 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
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THP086 Operation Modes of the SwissFEL Soft X-Ray Beamline Athos 757
 
  • S. Reiche, E. Ferrari, E. Prat, T. Schietinger
    PSI, Villigen PSI, Switzerland
 
  SwissFEL drives the two FEL beamlines Aramis and Athos, a hard and soft X-ray FEL, respectively. The layout of Athos extends from a simple SASE FEL beamline with the addition of delaying chicanes, external seeding and beam manipulation with wakefield sources (dechirper). It reserves also the space for a possible upgrade to self-seeding. This presentation gives an overview on the detailed layout enabling the unique operation modes of the Athos facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-THP086  
About • paper received ※ 23 August 2019       paper accepted ※ 16 September 2019       issue date ※ 05 November 2019  
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FRA01 FEL Operation at the European XFEL Facility 766
 
  • D. Nölle
    DESY, Hamburg, Germany
 
  The European XFEL is a SASE FEL based user facility in the metropole region of Hamburg providing hard and soft X-ray photons with extremely high brilliance. The three FEL lines are operated simultaneously and are powered by a superconducting LINAC based on TESLA technology. Average power levels of up to several W have been demonstrated as well for soft and hard X-rays and can be requested by user experiments on day by day basis. The contribution will report on the results of the commissioning within the last two years as well as on the transition to user operation. Typical operation conditions for parallel operation of 3 SASE lines will be discussed. The perspective for the operation with an extended photon energy range, as well as for full power operation with up to 27000 pulses per second will be presented.  
slides icon Slides FRA01 [27.196 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-FRA01  
About • paper received ※ 20 August 2019       paper accepted ※ 27 August 2019       issue date ※ 05 November 2019  
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FRA02 LCLS-II - Status and Upgrades 772
 
  • A. Brachmann, M. Dunham, J.F. Schmerge
    SLAC, Menlo Park, California, USA
 
  Funding: This work is supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-76SF00515.
The LCLS-II FEL is under construction at the SLAC National Accelerator Laboratory. This facility is based on a superconducting accelerator, providing a cw e- beam of 4 GeV at ~1 MHz. This beam drives two variable gap undulator (VGU) beam lines to generate photons in the soft and hard X-ray regime. High repetition rate photon beams will be available up to ~5 keV. The normal conducting accelerator will remain in operation, delivering milli-joule pulses up to ~20 keV for LCLS science. We anticipate to start the LCLS user program in the spring of 2020 using the new undulator systems. Superconducting accelerator operation will start in 2021 and will achieve full design-performance over the course of several years. Approximately a quarter of the superconducting accelerator is installed now and the associated cryoplant construction is near completion. The VGU systems will be installed and ready for beam delivery in early 2020. We will report on the project status, commissioning and ramp-up plans to achieve design performance and discuss plans to take advantage of the new facilities potential including our longer term strategy to extend the capability of SLAC’s LCLS FEL facility.
 
slides icon Slides FRA02 [24.207 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-FRA02  
About • paper received ※ 04 August 2019       paper accepted ※ 27 August 2019       issue date ※ 05 November 2019  
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FRA03 FLASH - Status and Upgrades 776
 
  • J. Rönsch-Schulenburg, K. Honkavaara, S. Schreiber, R. Treusch, M. Vogt
    DESY, Hamburg, Germany
 
  FLASH, the Free-Electron Laser at DESY in Hamburg was the first FEL user facility in the XUV and soft X-ray range. The superconducting RF technology allows to produce several thousand SASE pulses per second with a high peak and average brilliance. It developed to a user facility with a 1.25 GeV linear accelerator, two undulator beamlines running in parallel, and a third electron beamline containing the FLASHForward plasma wakefield experiment. Actual user operation and FEL research are discussed. New concepts and a redesign of the facility are developed to ensure that also in future FLASH will allow cutting-edge research. Upgrade plans are discussed in the contribution.  
slides icon Slides FRA03 [10.554 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-FRA03  
About • paper received ※ 20 August 2019       paper accepted ※ 28 August 2019       issue date ※ 05 November 2019  
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FRA04
Status of SXFEL Test and User Facilities  
 
  • Z.T. Zhao
    SSRF, Shanghai, People’s Republic of China
 
  Shanghai soft X-ray Free-Electron Laser facility (SXFEL) is being developed in two steps, the test facility SXFEL-TF and the user facility SXFEL-UF. The SXFEL-TF, as a critical development step towards constructing a soft X-ray FEL user facility in China, is under commissioning at the SSRF campus. In the meantime, the SXFEL-UF with designed wavelength in the water window region is being constructed, based on upgrading the SXFEL linac energy to 1.5 GeV and building two undulator lines and five experimental stations. In this paper, we report the construction and commissioning status and future plan of the SXFEL facility.  
slides icon Slides FRA04 [24.201 MB]  
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