New Lasing & Status of Projects
Paper Title Page
MOC01
0.1-nm FEL Lasing of PAL-XFEL  
 
  • H.-S. Kang, H. Heo, C. Kim, G. Kim, C.-K. Min, H. Yang
    PAL, Pohang, Kyungbuk, Republic of Korea
 
  The hard X-ray free electron laser at Pohang Accelerator Laboratory (PAL-XFEL) achieved saturation of a 0.144-nm free electron laser (FEL) beam on November 27, 2016, making it the third hard X-ray FEL in the world, following LCLS in 2009 and SACLA in 2011. On February 2, 2017, a saturated 1.52-nm FEL beam was also achieved in the soft X-ray FEL line with an electron beam energy of 3.0 GeV. Finally, saturation of a 0.104-nm FEL beam was achieved on March 16, 2017 using an electron beam energy of 9.47 GeV and K = 1.87. In this paper we present the commissioning result of PAL-XFEL as well as the beamline commissioning results.  
slides icon Slides MOC01 [7.016 MB]  
 
MOC02
First Lasing and Commissioning Status of SwissFEL  
 
  • S. Reiche
    PSI, Villigen PSI, Switzerland
 
  The Swiss FEL commissioning has started in 2016 to achieve lasing in the hard X-ray beamline Aramis with an electron beam energy up to 5.8 GeV. This talk gives a brief status of SwissFEL, first lasing results and the upcoming commissioning tasks in the future, including the second, soft X-ray beamline Athos in 2021.  
 
MOC03 Commissioning and First Lasing of the European XFEL 1
 
  • H. Weise, W. Decking
    DESY, Hamburg, Germany
 
  Funding: Work supported by the respective funding agencies of the contributing institutes; for details please see http:www.xfel.eu
The European X-ray Free-Electron Laser (XFEL) in Hamburg, Northern Germany, aims at producing X-rays in the range from 260 eV to 24 keV out of three undulators that can be operated simultaneously with up to 27,000 pulses per second. The XFEL is driven by a 17.5 GeV superconducting linac. This linac is the worldwide largest installation based on superconducting radio-frequency acceleration. The design is using the so-called TESLA technology which was developed for the superconducting version of an international electron positron linear collider. After eight years of construction the facility is now brought into operation. First lasing was demonstrated in May 2017. Experience with the super-conducting accelerator as well as beam commissioning results will be presented. The path to the first user experiments will be laid down.
 
 
MOC04
Status of Dalian Coherent Light Source  
 
  • W.Q. Zhang, D.X. Dai, G.L. Wang, G.R. Wu, X.M. Yang
    DICP, Dalian, People's Republic of China
  • S. Chen, C. Feng, D. Wang, M. Zhang, Z.T. Zhao
    SINAP, Shanghai, People's Republic of China
 
  Funding: DCLS is a joint project of Dalian Institute of Chemical Physics (DICP) and Shanghai Institute of Applied Physics (SINAP), CAS. It is supported by National Natural Science Foundation of China (21127902)
A Free Electron Laser with high brightness, ultrafast laser pulses in the vacuum ultraviolet (VUV) wavelength region is an ideal light source for excitation of valence electrons and ionization of molecular systems with very high efficiency. it is quite helpful for studies of important dynamic processes in physical, chemical and biological systems. Dalian Coherent Light Source (DCLS) plans to deliver optical beam from 50-150nm in picoseconds or 100 femtoseconds for such research. High gain harmonic generation is the perfect choice in VUV FEL for narrow bandwidth, stable power and low cost due to fewer undulators. After eight months of installation and machine commissioning, a 300-MeV electron beam was achieved with peak current of more than 300A, and the emittance was less than 1.5 mm.mrad. The FEL power for individual pulse at 133nm approached more than 200uJ with 266nm seed laser on Jan. 2017. The gain curve and spectrum of HGHG & SASE FEL was measured, and tapering undulator helps increase the power by almost 100% when the FEL output saturated. The user experiment will start on June 2017. It is open for good proposals from the whole world.
 
 
MOD01
Status of the LCLS-II FEL Project at SLAC  
 
  • P. Emma
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by the U.S. Department of Energy under Contract No. DE-AC02-76SF00515.
LCLS-II is a major new Free-Electron Laser (FEL) facility being built at SLAC, with collaborators from other US laboratories at ANL, Cornell, FNAL, LBNL, and TJNAF. This project aims to upgrade the operating LCLS-I facility by building a new 4-GeV superconducting RF (SRF) linac to provide continuous wave (CW) operation of two new FELs at beam rates of up to 1 MHz. The existing fixed-gap FEL undulator will be replaced by two new parallel adjustable-gap undulators providing an FEL spectral tuning range from 0.2 keV to 25 keV with average x-ray power levels approaching 1 kW. The existing 15-GeV copper linac in the last 3rd of the SLAC linac will be maintained as a low-rate, high-energy FEL driver in complementary operations with the new SRF linac. We present a brief status of the project, some of the latest test results, and thoughts on further facility expansion in the long term.
 
 
MOD02 Status of the FLASH FEL User Facility at DESY 1
 
  • K. Honkavaara
    DESY, Hamburg, Germany
 
  The FLASH facility at DESY (Hamburg, Germany) provides high brilliance FEL radiation at XUV and soft X-ray wavelengths for user experiments. Since April 2016, the second undulator beamline, FLASH2, is in user operation. We summarize the performance of the FLASH facility during the last two years including our experience to deliver FEL radiation to two user experiments simultaneously.  
 
MOD03
Present Status of SACLA  
 
  • H. Tanaka
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
 
  According to the increasing demand for XFEL utilization, introduction of pulse-by-pulse multi-FEL operation with full laser performance is a pressing issue, because most of experiments require a short pulse of less than 10 fs. The biggest obstacle is the emittance growth caused by CSR through a dogleg composed of a bend and a bend-back of 3 degrees, which seriously restricts on the operational peak current less than 2.5 kA. In order to solve this problem, we built a dual DBA-based dogleg using a 0.3 MW highly stable pulse power-supply in winter 2016. The full-performance pulse-by-pulse multi-FEL operation was successfully achieved in February 2017. This will be introduced in the user operation as a standard mode after Summer 2017 via the test use scheduled before the summer shutdown. On the other hand, the SXFEL user operation at BL1 has been started since 2016 and now two XFELs (BL2, BL3) and one SXFEL (BL1) beamlines are available simultaneously for user experiments at SACLA. This presentation shows the present status of SACLA focusing on the above topics.  
slides icon Slides MOD03 [7.606 MB]  
 
MOD04 Status and Perspectives of the FERMI FEL Facility 1
 
  • L. Giannessi, E. Allaria, L. Badano, F. Bencivenga, C. Callegari, F. Capotondi, 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, P. Furlan Radivo, G. Gaio, D. Gauthier, F. Gelmetti, F. Iazzourene, S. Krecic, M. Lonza, N. Mahne, M. Malvestuto, C. Masciovecchio, M. Milloch, N.S. Mirian, F. Parmigiani, G. Penco, A. Perucchi, L. Pivetta, O. Plekan, M. Predonzani, E. Principi, L. Raimondi, P. Rebernik Ribič, F. Rossi, E. Roussel, L. Rumiz, C. Scafuri, C. Serpico, P. Sigalotti, 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 characterised by a number of desirable properties, such as wavelength stability, low temporal jitter and longitudinal coherence. In this paper, after an overview of the FELs performances, we will 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, the possibility to perform multi-pulse experiments in different configurations and an Echo Enabled Harmonic Generation experiment on FEL-2, the FEL line extending to 4 nm (310 eV).  
 
MOD05
Status of the SXFEL Facility  
 
  • B. Liu, G.P. Fang, M. Gu, Q. Gu, Y.B. Leng, D. Wang, L. Yin, Z.T. Zhentang
    SINAP, Shanghai, People's Republic of China
 
  The 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, which will generate 8.8 nm FEL radiation with the two-stage cascaded HGHG-HGHG or EEHG-HGHG scheme, is under commissioning at the SSRF campus. In the meantime, The SXFEL-UF, with designed wavelength in the water window region, began construction in November 2016, based on upgrading the linac energy to 1.5 GeV and building a second undulator line and five experimental end-stations. Status and future plan of the SXFEL is presented here.  
 
MOD06 Matter-Radiation Interactions in Extremes (MaRIE) Project Overview 1
 
  • R.L. Sheffield, C.W. Barnes, J.P. Tapia
    LANL, Los Alamos, New Mexico, USA
 
  The National Nuclear Security Administration (NNSA) requires the ability to understand and test how material structures, defects and interfaces determine performance in extreme environments. The MaRIE Project will provide the science ability for control of materials and their production for vital national security missions. To meet the mission requirements, MaRIE must be an x-ray source that has high brilliance and with very flexible and fast pulses to observe phenomena at shock-relevant time scales, and with high enough energy to study high-Z materials. This talk will cover the rationale for the machine requirements, a pre-conceptual reference design that can meet those requirements, and preliminary research needed to address the critical high risk technologies.  
 
MOP041 Commissioning of FEL-Based Coherent Electron Cooling System 1
 
  • V. Litvinenko, Z. Altinbas, R. Anderson, S.A. Belomestnykh, K.A. Brown, J.C.B. Brutus, A.J. Curcio, A. Di Lieto, C. Folz, D.M. Gassner, T. Hayes, R.L. Hulsart, P. Inacker, J.P. Jamilkowski, Y.C. Jing, D. Kayran, R. Kellermann, R.F. Lambiase, G.J. Mahler, M. Mapes, A. Marusic, W. Meng, K. Mernick, R.J. Michnoff, T.A. Miller, M.G. Minty, G. Narayan, P. Orfin, D. Phillips, I. Pinayev, T. Rao, D. Ravikumar, J. Reich, G. Robert-Demolaize, T. Roser, S.K. Seberg, F. Severino, B. Sheehy, J. Skaritka, L. Smart, K.S. Smith, L. Snydstrup, V. Soria, R. Than, C. Theisen, J.E. Tuozzolo, J. Walsh, E. Wang, G. Wang, D. Weiss, B. P. Xiao, T. Xin, A. Zaltsman, Z. Zhao
    BNL, Upton, Long Island, New York, USA
  • C.H. Boulware, T.L. Grimm
    Niowave, Inc., Lansing, Michigan, USA
  • K. Mihara
    Stony Brook University, Stony Brook, USA
  • I. Petrushina
    SUNY SB, Stony Brook, New York, USA
  • K. Shih
    SBU, Stony Brook, New York, USA
  • W. Xu
    PKU, Beijing, People's Republic of China
 
  Funding: DoE NP office, grant DE-FOA-0000632, NSF grant PHY-1415252
In this talk we are presenting the most recent results from the commissioning of unique Coherent Electron Cooling system, which is using an FEL amplifier to facilitate cooling of hadrons by an electron beam. We present achieved results as well as changes we encountered in the process.
 
 
MOP042 Status of Seeding Development at sFLASH 1
 
  • V. Grattoni, R.W. Aßmann, J. Bödewadt, I. Hartl, T. Laarmann, C. Lechner, M.M. Mohammad Kazemi, A. Przystawik
    DESY, Hamburg, Germany
  • A. Azima, M. Drescher, W. Hillert, L.L. Lazzarino, V. Miltchev, J. Roßbach
    University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
  • S. Khan, N.M. Lockmann, T. Plath
    DELTA, Dortmund, Germany
 
  The experimental seeding setup at FLASH has operated now for two years in high-gain harmonic generation mode. Using a transverse deflecting structure downstream of the seeding section allows a temporal characterization of seeded electron bunches. In addition, temporal characterization of the seeded FEL beam can be performed in a dedicated diagnostic hutch. In this contribution, we give an overview of the latest achievements and present an outlook of the planned studies.  
poster icon Poster MOP042 [1.713 MB]  
 
MOP043 Plasma Wakefield Accelerated Beams for Demonstration of FEL Gain at FLASHForward 1
 
  • P. Niknejadi, A. Aschikhin, C. Behrens, S. Bohlen, R.T.P. D'Arcy, J. Dale, L. Di Lucchio, M. Felber, B. Foster, L. Goldberg, J.-N. Gruse, Z. Hu, S. Karstensen, A. Knetsch, O. S. Kononenko, V. Libov, K. Ludwig, A. Martinez de la Ossa, F. Marutzky, T.J. Mehrling, J. Osterhoff, C.A.J. Palmer, K. Poder, P. Pourmoussavi, M. Quast, J.-H. Röckemann, J. Schaffran, L. Schaper, H. Schlarb, B. Schmidt, S. Schreiber, S. Schröder, J.-P. Schwinkendorf, B. Sheeran, M.J.V. Streeter, G.E. Tauscher, V. Wacker, S. Weichert, S. Wesch, P. Winkler, S. Wunderlich, J. Zemella
    DESY, Hamburg, Germany
  • A.R. Maier
    CFEL, Hamburg, Germany
  • A.R. Maier, A. Martinez de la Ossa, M. Meisel, J.-H. Röckemann
    University of Hamburg, Institut für Experimentalphysik, Hamburg, Germany
  • C.B. Schroeder
    LBNL, Berkeley, California, USA
  • V. Wacker
    University of Hamburg, Hamburg, Germany
 
  Funding: Work supported by Helmholtz ARD program and VH-VI-503
FLASHForward is the Future-ORiented Wakefield Accelerator Research and Development project at the DESY free-electron laser (FEL) facility FLASH. It aims to produce high-quality, GeV-energy electron beams over a plasma cell of a few centimeters. The plasma is created by means of a 25 TW Ti:Sapphire laser system. The plasma wakefield will be driven by high-current-density electron beams extracted from the FLASH accelerator. The project focuses on the advancement of plasma-based particle acceleration technology through the exploration of both external and internal witness-beam injection schemes. Multiple conventional and cutting-edge diagnostic tools, suitable for diagnosis of short electron beams, are under development. The design of the post-plasma beamline sections will be finalized based on the result of these aforementioned diagnostics. In this paper, the status of the project, as well as the progress towards achieving its overarching goal of demonstrating FEL gain via plasma wakefield acceleration, is discussed.
 
 
MOP044 Commissioning Status of the European XFEL Photon Beam System 1
 
  • F. Le Pimpec
    XFEL. EU, Hamburg, Germany
 
  The European XFEL located in the Hamburg region in Germany has finished its construction phase and is currently being commissioned. The European XFEL facility aims at producing X-rays in the range from 260~eV up to 24~keV out of three undulators that can be operated simultaneously with up to 27000~pulses/second. The FEL is driven by a 17.5~GeV linear accelerator based on TESLA-type superconducting accelerator modules. The accelerator has finished its first commissioning phase and is currently delivering photon beam to the experimental areas for commissioning in view to the user operation. This paper presents the status of the photon beam system from the undulators to the 3 experimental areas as well as the status of each instruments.  
 
MOP046 Progress of Delhi Light Source at IUAC, New Delhi 1
 
  • S. Ghosh, S. R. Abhilash, R.K. Bhandari, G.K. Chaudhari, V.J. Joshi, D. Kabiraj, D. Kanjilal, B. Karmakar, J. Karmakar, N. Kumar, S. Kumar, A. Pandey, P. Patra, G.O. Rodrigues, B.K. Sahu, A. Sharma, S. Tripathi
    IUAC, New Delhi, India
  • A. Aryshev, M.K. Fukuda, S. Fukuda, N. Terunuma, J. Urakawa
    KEK, Ibaraki, Japan
  • U. Lehnert, P. Michel
    HZDR, Dresden, Germany
  • V. Naik, A. Roy
    VECC, Kolkata, India
  • T. Rao
    BNL, Upton, Long Island, New York, USA
  • M. Tischer
    DESY, Hamburg, Germany
 
  Funding: This project is jointly supported by Inter University Accelerator Center and Board of Research in Nuclear Science.
The first phase of the pre-bunched FEL based on the Photoinjector RF electron gun, known as Delhi Light Source (DLS),* has been planned at Inter University Accelerator Centre (IUAC), New Delhi. The electron gun made from OFHC copper had already been fabricated and tested with low power RF at KEK, Japan. The beam optics calculation by using ASTRA, GPT codes has been performed and radiation produced from the pre-bunched electron bunches are being calculated.** The high power RF systems will be commissioned at IUAC by the beginning of 2018. The design of the laser system is being finalized and assembly/testing of the complete laser system will be started soon at KEK. The initial design of the photocathode deposition mechanism has also been completed and its procurement/development process will start shortly. The first version of the undulator magnet design has been completed and further improvements are underway.*** The initial arrangements of the DLS beam line have been worked out and various beam diagnostics components are being finalised. The production of the electron beam and THz radiation is expected by 2018 and 2019, respectively.
* S. Ghosh et al., NIM-B, (2017) in press.
** V. Joshi et al., Proc. of this conference.
*** S. Tripathi et al., Proc. of this conference.
 
poster icon Poster MOP046 [1.594 MB]  
 
MOP047 Design Calculation on Beam Dynamics and THz Radiation of Delhi Light Source 1
 
  • V.J. Joshi, R.K. Bhandari, S. Ghosh, D. Kanjilal, B. Karmakar, J. Karmakar, N. Kumar, S. Tripathi
    IUAC, New Delhi, India
  • A. Aryshev
    KEK, Ibaraki, Japan
  • U. Lehnert
    HZDR, Dresden, Germany
 
  Funding: This project is jointly supported by Inter University Accelerator Center and Board of Research in Nuclear Science.
The development of a compact light source facility, Delhi Light Source (DLS), based on a pre-bunched free electron laser, has been initiated at Inter University Accelerator Centre (IUAC).* A photocathode-based normal conducting RF gun will generate a low-emittance 'comb' electron beam with a maximum energy of ~8 MeV which when injected into ~ 1.5 metre compact undulator magnet (~0.4 < Krms < ~2) will produce intense THz radiation in the frequency range of 0.15 THz to 3.0 THz.** Each microbunch of the electron beam is expected to emit super-radiant radiation, and an enhancement in the overall spectral power can be achieved if the frequency (inverse of the spatial separation) of the electron microbunches coincides with that of the THz radiation being emitted. There will be provisions to vary the spatial separation between the successive microbunches of the 'comb' beam so that by varying the undulator magnetic field and/or electron energy, the THz frequency range can be tuned. The results of the beam optics for the entire range of frequencies mentioned above along with the detailed information of the radiation to be generated from the facility will be presented in the paper.
* S. Ghosh et al., NIMB-2017, in press.
** S.Tripathi et al., Proc. of this conference.
 
poster icon Poster MOP047 [0.954 MB]  
 
MOP048 A Compact THz FEL at KAERI: the Project and the Status 1
 
  • S.V. Miginsky, S. Bae, B.A. Gudkov, K.H. Jang, Y.U. Jeong, K. Lee, J. Mun, S. Setiniyaz
    KAERI, Daejon, Republic of Korea
  • S. H. Park
    Korea University Sejong Campus, Sejong, Republic of Korea
 
  A new compact THz free electron laser driven by a microtron is being recently developed at KAERI. It uses a hybrid electromagnetic undulator. A novel scheme of injection/extraction/outcoupling is developed. The machine is partially assembled and commissioned. Characteristic features and current state are described in the paper.  
 
MOP049 Development of Compact THz Coherent Undulator Radiation Source at Kyoto University 1
 
  • S. Krainara, T. Kii, H. Ohgaki, H. Zen
    Kyoto University, Kyoto, Japan
  • S. Suphakul
    Chiang Mai University, Chiang Mai, Thailand
 
  A new THz Coherent Undulator Radiation (THz-CUR) source has been developed to generate intense quasi-monochromatic THz radiation at the Institute of Advanced Energy, Kyoto University. The system consists of a photocathode RF gun, bunch compression chicane, quadrupole magnets, and short planar undulator. The total length of this system is around 5 meters. At present, this compact accelerator has successfully started giving the THz-CUR in the frequency range of 0.16 - 0.65 THz. To investigate the performance of the source, the relationship between the total radiation energy, peak power and power spectrum as a function of bunch charge at the different undulator gaps were measured. The results are reported in the paper.  
 
MOP050 Present Status of Infrared FEL Facility at Kyoto University 1
 
  • H. Zen, T. Kii, S. Krainara, K. Masuda, H. Ohgaki, J. Okumura, S. Suphakul, S. Tagiri, K. Torgasin
    Kyoto University, Kyoto, Japan
 
  A mid-infrared free electron laser (FEL) named KU-FEL has been developed for promoting energy-related research at the Institute of Advanced Energy, Kyoto University.* KU-FEL can cover the wavelength range from 3.6 to 23 micrometers and is routinely operated for internal and external user experiments. Recently a THz Coherent Undulator Radiation (CUR) source using a photocathode RF gun has been developed as an extension of the facility.* As the result of commissioning the experiment, it was confirmed that the CUR source can cover the frequency range from 160 to 550 GHz. Present status of these infrared light sources will be presented.
* H. Zen et al., Physics Procedia 84, pp.47-53 (2016).
 
 
MOP051 Polish In-Kind Contribution to European XFEL: Status in Summer 2017 1
 
  • J.A. Lorkiewicz, K. Chmielewski, Z. Gołębiewski, W.C. Grabowski, K. Kosinski, K. Kostrzewa, P. Krawczyk, I.M. Kudla, P. Markowski, K. Meissner, E.P. Plawski, M. Sitek, J. Szewiński, M. Wojciechowski, Z. Wojciechowski, G. Wrochna
    NCBJ, Świerk/Otwock, Poland
  • J. Świerbleski, M. Duda, M. Jezabek, K. Kasprzak, A. Kotarba, K. Krzysik, M. Stodulski, M. Wiencek
    IFJ-PAN, Kraków, Poland
  • P.B. Borowiec
    Solaris National Synchrotron Radiation Centre, Jagiellonian University, Kraków, Poland
  • M. Chorowski, P. Duda, A. Iluk, K. Malcher, J. Polinski, E. Rusinski
    WRUT, Wrocław, Poland
  • J. Fydrych
    ESS, Lund, Sweden
  • J. Glowinkowski, M. Winkowski, P. Wlk
    Wroclaw Technology Park, Wroclaw, Poland
  • P. Grzegory, G. Michalski
    Kriosystem, Wroclaw, Poland
  • J.K. Sekutowicz
    DESY, Hamburg, Germany
 
  In the years 2010-2017, some of the Polish research institutes took responsibility of production and delivery of certain components or test procedures for the EU-XFEL sc linear electron accelerator and elements of slow control systems for the first six XFEL experimental instruments. The presentation summarizes the output of the work on design and manufacturing of cryogenic transfer lines for supercritical helium transport and two vertical cryostats for low-power acceptance tests of sc cavities. The cryogenic installations were prepared by Wroclaw University of Science and Technology and its subcontractors. A team of Institute of Nuclear Physics in Cracow was in charge of preparation and performance of acceptance tests for XFEL sc cavities, accelerator modules and sc magnets. Two teams of National Centre for Nuclear Research (NCBJ)in Świerk were involved in the project. One of them was responsible for design, manufacturing, testing and delivery of 1648 high-order mode couplers, 824 pick-up antennae and 108 beam-line absobers. The other NCBJ group was obliged to deliver 200 modules containing programmable logic controller terminals to be used at the ends of SASE x-ray beam lines.  
 
MOP052 First Observation of Coherent THz Undulator Radiation Driven by NSRRC High Brightness Photo-Injector 1
 
  • M.C. Chou, K.T. Hsu, S.Y. Hsu, N.Y. Huang, C.-S. Hwang, J.-Y. Hwang, J.C. Jan, C.K. Kuan, W.K. Lau, A.P. Lee, C.C. Liang, G.-H. Luo, I.C. Sheng
    NSRRC, Hsinchu, Taiwan
  • Y.H. Wen
    NTHU, Hsinchu, Taiwan
 
  Generation and characterization of coherent undulator radiation in the THz region using the NSRRC S-band photo-injector linac system is achieved. The system consists of a laser photocathode RF gun and one 5.2-m long S-band accelerating linac. Electron bunches in the linac can be accelerated and compressed simultaneously by velocity bunching. In this work, narrow-band tunable fully-coherent THz radiation can be produced from a U100 planar undulator when it is driven by a 100 pC electron bunch with effective bunch length of 90 fs. The experimental setup and the measurement of the power and the frequency spectrum of the coherent THz undulator radiation are reported.  
poster icon Poster MOP052 [2.111 MB]  
 
MOP053 High Spectral Density Compton Back-Scattered Gamma-Ray Sources at Fermilab 1
 
  • D. Mihalcea, A. Khizhanok, P. Piot
    Northern Illinois University, DeKalb, Illinois, USA
  • B.T. Jacobson, A.Y. Murokh
    RadiaBeam, Santa Monica, California, USA
  • P. Piot, J. Ruan
    Fermilab, Batavia, Illinois, USA
 
  A ~1 MeV gamma-ray source is planned to be built at Fermilab following the completion of the ~300 MeV superconducting linac. The high-energy photons are back-scattered from the interactions between electrons and high-intensity IR laser pulses. In this contribution, we discuss some of the experiment design challenges and evaluate the performances of the gamma-ray source. We expect the peak brilliance to be of the order of 1022 photons/s-(mm-mrad)2-0.1\% BW and the spectral density of the radiation in excess of 3x105 photons/s/eV.  
 
MOP054 CLARA Facility Layout and FEL Schemes 1
 
  • D.J. Dunning
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
 
  CLARA is a new FEL test facility being developed at STFC Daresbury Laboratory in the UK. Commissioning has started on the front-end (photo-injector and linac) while the design of the later stages is still being finalised. We present the latest design work, focusing on the layout and specification of components in and around the undulator sections. We give an overview of the design and modelling of the FEL schemes planned to be tested.  
 
MOP055 SCLF: An 8-GeV CW SCRF Linac-Based X-Ray FEL Facility in Shanghai 1
 
  • Z.T. Zhao, D. Wang, L. Yin
    SINAP, Shanghai, People's Republic of China
  • Z.H. Yang
    USTC/NSRL, Hefei, Anhui, People's Republic of China
 
  The Shanghai Coherent Light Facility (SCLF) is a newly proposed high repetition-rate X-ray FEL facility, based on an 8-GeV CW superconducting RF linac. It will be located at Zhangjiang High-tech Park, close to the SSRF campus in Shanghai, at the depth of ~38m underground and with a total length of 3.1 km. Using 3 phase-I undulators, the SCLF aims at generating X-rays between 0.4 and 25 keV at rates up to 1MHz. This paper describes the design concepts of this hard X-ray user facility.  
 
MOP066 Free Electron Lasers in 2017 1
 
  • P.J. Neyman
    Compass Scientific Engineering, Compass Manufacturing Services, Fremont, USA
  • J. Blau, K. R. Cohn, W.B. Colson
    NPS, Monterey, California, USA
  • S.C. Gottschalk
    STI Optronics, Inc., Redmond, USA
  • A.M.M. Todd
    AES, Medford, New York, USA
 
  Forty-one years after the first operation of the short wavelength free electron laser (FEL) at Stanford University, there continue to be many important experiments, proposed experiments, and user facilities around the world. Properties of FELs in the infrared, visible, UV, and x-ray wavelength regimes are tabulated and briefly discussed.