Keyword: survey
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MOPML002 Status of the JLEIC Ion Collider Ring Design dynamic-aperture, collider, solenoid, detector 394
  • G.H. Wei, F. Lin, V.S. Morozov, Y. Zhang
    JLab, Newport News, Virginia, USA
  • Y. Cai, Y.M. Nosochkov
    SLAC, Menlo Park, California, USA
  Funding: Authored by JSA, LLC under U.S. DOE Contract No. DE-AC05-06OR23177 and DE-AC02-06CH11357. Work supported also by the US DOE Contract DE-AC02-76SF00515.
We present an update on the lattice design and beam dynamics study of the ion collider ring of JLEIC (Jefferson Lab Electron Ion Collider). The collider ring consists of two 261.7 degree arcs connected by two straight sections crossing each other. One of the straights houses an interaction region (IR) and is shaped to make a 50 mrad crossing angle with the electron beam at the interaction point (IP) to meet physics requirements. The forward acceptance requirements downstream of the IP in the ion direction lead to an asymmetric IR lattice design. The detector solenoid effects and the multipole fields of the IR magnets further complicate this picture. In this paper, compensation of the detector solenoid effects is considered together with orbit correction and multipole effects. We also study local compensation of the magnet multipoles using dedicated multipole correctors. And an optimization of the betatron tunes is also presented.
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MOPML050 A Massive Open Online Course on Particle Accelerators target, radiation, neutron, synchrotron 512
  • N. Delerue, A. Faus-Golfe
    LAL, Orsay, France
  • M.E. Biagini
    INFN/LNF, Frascati (Roma), Italy
  • E. Bründermann, A.-S. Müller
    KIT, Eggenstein-Leopoldshafen, Germany
  • P. Burrows
    JAI, Oxford, United Kingdom
  • G. Burt
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • C. Darve, R.A. Yogi
    ESS, Lund, Sweden
  • V.V. Dmitriyeva, S.M. Polozov
    MEPhI, Moscow, Russia
  • J. Kvissberg
    Lund University, Lund, Sweden
  • P. Lebrun
    JUAS, Archamps, France
  • E. Métral, H. Schmickler, J. Toes
    CERN, Geneva, Switzerland
  • S.P. Møller
    ISA, Aarhus, Denmark
  • L. Rinolfi
    ESI, Archamps, France
  • A. Simonsson
    Stockholm University, Stockholm, Sweden
  • V.G. Vaccaro
    Naples University Federico II and INFN, Napoli, Italy
  Funding: European Union H2020 - ARIES Project
The TIARA (Test Infrastructure and Accelerator Research Area) project funded by the European Union 7th framework programme made a survey of provision of education and training in accelerator science in Europe highlighted the need for more training opportunities targeting undergraduate-level students. This need is now being addressed by the European Union H2020 project ARIES (Accelerator Research and Innovation for European Science and Society) via the preparation of a Massive Online Open Course (MOOC) on particle accelerator science and engineering. We present here the current status of this project, the main elements of the syllabus, how it will be delivered, and the schedule for providing the course.
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WEPAL070 HLS System to Measure the Location Changes in Real Time of PAL-XFEL Devices FEL, alignment, linac, real-time 2345
  • H. J. Choi, J.H. Han, H.-S. Kang, S.H. Kim, H.-G. Lee, S.B. Lee
    PAL, Pohang, Kyungbuk, Republic of Korea
  All components of PAL-XFEL (Pohang Accelerator Laboratory's X-ray free-electron laser) were completely installed in December 2015, and Hard X-ray 0.1nm lasing achieved through its beam commissioning test and machine study on March 16, 2017. The beam line users has been performing various tests including pump-probe X-ray scattering, time-resolved x-ray liquidography, etc in the hard x-ray beam line since March 22. The energy and flux of x-ray photon beam generated from XFEL and synchronization timing should be stable to ensure successful time-resolved tests. Several parts that comprise the large scientific equipment should be installed and operated at precise three-dimensional location coordinates X, Y, and Z through survey and alignment to ensure their optimal performance. As time goes by, however, the ground goes through uplift and subsidence, which consequently changes the coordinates of installed components and leads to alignment errors ΔX, ΔY, and ΔZ. As a result, the system parameters change, and the performance of the large scientific equipment deteriorates accordingly. Measuring the change in locations of systems comprising the large scientific equipment in real time would make it possible to predict alignment errors, locate any region with greater changes, realign components in the region fast, and shorten the time of survey and alignment. For this purpose, a HLS's (hydrostatic leveling sensor) with 0.2um of resolution are installed and operated in a waterpipe of total length 1km in the PAL-XFEL building. This paper is designed to introduce the operating principle of the HLS, the installation and operation of the HLS system, and how to utilize the HLS system in order to ensure beam stabilization.  
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THPMK026 Mobile Free-Electron Laser for Remote Atmospheric Survey laser, FEL, electron, free-electron-laser 4351
  • S. Johnson, G.A. Krafft, B. Terzić
    ODU, Norfolk, Virginia, USA
  • G.A. Krafft
    JLab, Newport News, Virginia, USA
  Funding: This paper is authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05- 06OR23177. E.J. was supported by the Virginia Space Grant Consortium, grant number 16-589.
Reliable atmospheric surveys for carbon distributions will be essential to building an understanding of the Earth's carbon cycle and the role it plays in climate change. One of the core needs of NASA 's Active Sensing of CO2 Over Nights, Days and Seasons (ASCENDS) Mission is to advance the range and precision of current remote atmospheric survey techniques. The feasibility of using accelerator-based sources of infrared light to improve current airborne lidar systems has been explored. A literary review has been conducted to asses the needs of ASCENDS versus the current capabilities of modern atmospheric survey technology, and the parameters of a free electron laser (FEL) source were calculated for a lidar system that will meet these needs. By using the "Next Linear Collider" from the Stanford Linear Accelerator Center (SLAC), a mobile FEL-based lidar may be constructed for airborne surveillance. The calculated energy of the lidar pulse is 0.1 joule: this output is a two orders of magnitude gain over current lidar systems, so in principle, the mobile FEL will exceed the needs of ASCENDS. Further research will be required to asses other challenges to mobilizing the FEL technology.
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