WG5: Applications
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Resonant Coherent Diffraction Radiation System at KEK-cERL  
  • Y. Honda, A. Aryshev, T. Miyajima, T. Obina, R. Ryukou, M. Shimada, R. Takai, N. Yamamoto
    KEK, Ibaraki, Japan
  Coherent radiation from a short bunched electron beam has been expected to be a high power source in THz regime. Especially the feature of the modern energy recovery linac is suitable for a high averaged power source. We propose to test an advanced scheme of resonantly exciting coherent diffraction radiation in an optical cavity. By stimulating the radiation in a multi-bunch beam, highly enhanced radiation power can be extracted. This system can excite all the cavity longitudinal modes at the same time, it can be a broadband source. We are preparing an experimental setup to test the resonant radiation in the cERL at KEK.  
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TUIACC001 LERF - New Life for the Jefferson Lab FEL 45
  • C. Tennant, S.V. Benson, J.R. Boyce, J.L. Coleman, D. Douglas, S.L. Frierson, J. Gubeli, C. Hernandez-Garcia, K. Jordan, C. Keith, R.A. Legg, M.D. McCaughan, T. Satogata, M. Spata, M.G. Tiefenback, S. Zhang
    JLab, Newport News, Virginia, USA
  • R. Alarcon, D. Blyth, R.A. Dipert, L. Ice, G. Randall, B.N. Thorpe
    Arizona State University, Tempe, USA
  • J. Balewski, J.C. Bernauer, J.C. Bessuille, R. Corliss, R.F. Cowan, C. Epstein, P.F. Fisher, I. Friščić, D.K. Hasell, E. Ihloff, J. Kelsey, Y.-J. Lee, R. Milner, P. Moran, D. Palumbo, S. Steadman, C. Tschalär, C. Vidal, Y. Wang
    MIT, Cambridge, Massachusetts, USA
  • T. Cao, B. Dongwi, P. Guèye, N. Kalantarians, M. Kohl, A. Liyanage, J. Nazeer
    Hampton University, Hampton, Virginia, USA
  • R. Cervantes, A. Deshpande, N. Feege
    Stony Brook University, Stony Brook, USA
  • K. Dehmelt
    SUNY SB, Stony Brook, New York, USA
  • P.E. Evtushenko
    HZDR, Dresden, Germany
  • M. Garçon
    CEA/DRF/IRFU, Gif-sur-Yvette, France
  • B. Surrow
    Temple University, Philadelphia, USA
  Funding: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.
In 2012 Jefferson Laboratory's energy recovery linac (ERL) driven Free Electron Laser successful completed a transmission test in which high current CW beam (4.3 mA at 100 MeV) was transported through a 2 mm aperture for 7 hours with beam losses as low as 3 ppm. The purpose of the run was to mimic an internal gas target for DarkLight* - an experiment designed to search for a dark matter particle. The ERL was not run again until late 2015 for a brief re-commissioning in preparation for the next phase of DarkLight. In the intervening years, the FEL was rebranded as the Low Energy Recirculator Facility (LERF), while organizationally the FEL division was absorbed into the Accelerator division. In 2016 several weeks of operation were allocated to configure the machine for Darklight with the purpose of exercising - for the first time - an internal gas target in an ERL. Despite a number of challenges, including the inability to energy recover, beam was delivered to a target of thickness 1018 cm-2 which represents a 3 order of magnitude increase in thickness from previous internal target experiments. Details of the machine configuration and operational experience will be discussed.
* J. Balewski et al., A Proposal for the DarkLight Experiment at the Jefferson Laboratory Free Electron Laser, May 2012.
slides icon Slides TUIACC001 [23.840 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2017-TUIACC001  
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Novosibirsk ERL Based FEL as User Facility  
  • V.V. Kubarev
    BINP SB RAS, Novosibirsk, Russia
  The Novosibirsk free electron laser (NovoFEL) is the first multi-turn energy-recovery linear accelerator with three separate laser systems (the terahertz, far-infrared and mid-infrared ones). Radiation of the FELs is transported now from accelerating hall to thirteen user and diagnostics stations by one optical channel filled dry air-nitrogen mixture. In this paper, we describe main radiation parameters of the NovoFEL, workstations of the facility and survey selected recent experiments using substantially intense monochromatic terahertz laser radiation, which can be tuned from 90 μm to 240 μm.  
slides icon Slides TUIACC002 [7.096 MB]  
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Asymmetric, Dual Axis Cavity for Energy Recovery LINAC: Recent Developments and Possible Applications  
  • I.V. Konoplev, A.J. Lancaster, K. Metodiev, A. Seryi
    JAI, Oxford, United Kingdom
  • R. Ainsworth
    Fermilab, Batavia, Illinois, USA
  • G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  High luminosity THz and X-ray radiation are vital for many branches of science and industry (for example biochemistry and material science) and to achieve it a high electron bunch current is needed. Another requirement to such radiators is high wall plug efficiency. The efficiency is usually very low and the electron beam energy recovery is the most attractive way to improve it. This is normally done using SCRF ERL systems but the bunch current limitations for these systems are more dramatic when compared with a conventional LINACs. Increase of the bunch current in conventional ERLs above some threshold value (normally around 100 mA) leads to beam instabilities development and beam transportation termination. This naturally limits the instruments' luminosity. Here we suggest and discuss the novel concept and specific designs which can enable a SCRF ERL system capable of generating picosecond electron bunches with up to 1A current. The aim of the project is to demonstrate the operation of dual axis asymmetric ERL and its application in research and industry. A preliminary market research of such devices has been recently conducted and results will be also presented.  
slides icon Slides TUIACC003 [10.823 MB]  
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Photon Science Exploitation of ALICE in Biomedical Science  
  • M. Surman
    STFC/DL/SRD, Warrington, Cheshire, United Kingdom
  • T. Craig, P. Harrison, J. Ingham, M.R.F. Siggel-King, C. Smith, P. Weightman
    The University of Liverpool, Liverpool, United Kingdom
  • A. Cricenti
    ISM-CNR, Rome, Italy
  • D.J. Dunning, Y.M. Saveliev, N. Thompson
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • P. Gardner, M.J. Pilling
    MIB, Manchester, United Kingdom
  • M. Luce
    CNR-ISM, Trieste, Italy
  • R.L. Williams
    University of Liverpool, Liverpool, United Kingdom
  Funding: UK Research Counils EPSRC and STFC
The UK has maintained an ambition to build a national FEL facility and this has been reinforced in a recent strategic review*. The Daresbury Laboratory is engaged in research and development programmes to ensure delivery of a high performance UK XFEL and is operating a number of research accelerators to support all aspects of FEL technology. ALICE is an ERL built to develop skills and experience in superconducting RF. It provides mid infrared and THz light from a cavity FEL and a CSR source respectively. From the very start of the ALICE programme a photon science exploitation activity was pursued. In the last few years all funding for ALICE was for biomedical exploitation by a consortium led by the University of Liverpool, which includes clinicians as well as scientists. In this paper we review the work, including investigating the effect of THz radiation on living cells and sub-diffraction chemical imaging of normal and cancerous human tissue by IR microscopy. The stringent demands of these experiments required substantial improvement on the performance of ALICE. Limitations of the current configuration are discussed and schemes for extending its capability are presented.
* www.stfc.ac.uk/files/fel-report-2016/
slides icon Slides TUIBCC001 [24.396 MB]  
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EUV ERLs for Semiconductor Integrated Circuit Lithography  
  • N. Nakamura
    KEK, Ibaraki, Japan
  Although the technologies on EUV Lithography are progressing based on laser-produced plasma (LPP) source, which is expected to produce the EUV power of 250 W or more, it is important to develop a new-type EUV source to meet future demand for higher power than 1 kW. Energy recovery linac(ERL) based free electron lasers(FEL) are possible candidates of a high-power EUV source that can distribute 1 kW class power to multiple scanners simultaneously. In order to demonstrate the feasibility of EUV ERLs for lithography, an EUV source based on an 800 MeV ERL operating at the wavelength of 13.5 nm has been designed using available technologies without too much development and resources of the KEK cERL. In addition, the EUV-FEL Light Source Study Group for Industrialization has been established in Japan to realize industrialization of such an ERL-EUV source and the related items. We will present recent progress of the EUV-ERL design work and some activities and considerations for the industrialization.  
slides icon Slides TUIBCC002 [21.874 MB]  
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Applications for CBETA at Cornell  
  • G.H. Hoffstaetter
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  At Cornell, a 4-turn ERL with FFAG return loop is being constructed by a collaboration of Cornell and BNL. It is designed to produce a high-current (up to 40mA) CW beam of moderate energy (150MEV). For after successful commissioning, several applications of CBETA have been envisioned and are being analyzed, these include (a) a dark-photon search, (b) a Compton-Backscattering hard-x-ray source, (c) a Terahertz FEL, (d) a facility or ERL accelerator physics studies, and (e) a test facility with CW beam to test, for example, SRF cryomodules for eRHIC or for industrial isotope production  
slides icon Slides TUIBCC003 [25.573 MB]  
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Applications by Means of the Accelerator Technologies Based on cERL  
  • H. Kawata
    KEK, Ibaraki, Japan
  The cERL has been constructed for the test facility so as to demonstrate the ERL operation as the view point of the accelerator technologies. Therefore, the application programs by using cERL are not the main purpose. However, we have demonstrated several test productions such as laser Compton scattering X-ray production and THz radiation. Furthermore, we have tried to draw several industrial applications such as EUV-FEL light source, security systems for nuclear material based on gamma-ray production by means of laser Compton scattering, high resolution medical x-ray imaging systems, and so on. I will present these activities at the workshop.  
slides icon Slides TUIBCC004 [2.455 MB]  
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ERL Upgrade Plans for the ARIEL E-Linac  
  • R.E. Laxdal
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  TRIUMF is engaged in a major project, ARIEL, with the aim to triple the radioactive ion beam output available to ISAC experiments. A central piece of the ARIEL project is a new superconducting 1.3GHz electron linac with final design parameters of 50MeV and 10mA cw. Presently two cryomodules housing three elliptical cavities and capable of 30-35MeV have been installed and are being commissioned. Space has been saved in the electron linac hall to allow a future recirculating ring to operate in energy boost mode or as an energy recovery linac. Initial design considerations for the ERL are being discussed to converge towards a proposal to be submitted as part of the next TRIUMF five year plan, 2020-2025.  
slides icon Slides THICCC004 [8.778 MB]  
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Generation of High-flux High-energy Ultra-short Vortex Photon Beams From JLab ERL Facility  
  • S. Zhang
    JLab, Newport News, Virginia, USA
  Abstract not submitted at print time.  
slides icon Slides FRIACC001 [14.528 MB]  
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Nuclear Physics Experiments at Mesa  
  • K. Aulenbacher
    IKP, Mainz, Germany
  Funding: Work supported by the DFG through excellence cluster PRISMA
The MESA-ERL will create unique possibilities for scattering experiments with windowless targets. This research program will take place at a didicated set up for which a two arm spectrometer with specifically adapted detector technolgy is bein build. The suite of experiemtns includes a wide range of physics topics, e.g. search of exotic particles or accurate determination of nuclear form factors.
slides icon Slides FRIACC002 [20.282 MB]  
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ERL Developments for eRHIC  
  • V. Litvinenko
    BNL, Upton, Long Island, New York, USA
  Abstract not submitted at print time.  
slides icon Slides FRIACC003 [18.067 MB]  
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FRIBCC005 ERL17 Workshop, WG5 Summary: Applications 83
  • P.A. McIntosh
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • I.V. Konoplev
    JAI, Oxford, United Kingdom
  For the ERL17 Applications Working Group (WG5), a focus was identified for Photon science and Particle and Nuclear Physics application areas. For the Photon applications; THz, FEL and Compton drivers were most relevant and for the Particle and Nuclear Physics field, Compton, Polarised and Cooled beams were most prominent. The following then highlights the key performance needs, challenges and anticipated future demands for each of these application areas as reviewed and discussed at the workshop.  
slides icon Slides FRIBCC005 [2.802 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-ERL2017-FRIBCC005  
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