Author: Chu, P.
Paper Title Page
MOPPC095 XAL's Online Model at ReA3 to Understand Beam Performance 358
  • C. Benatti
    NSCL, East Lansing, Michigan, USA
  • P. Chu, M.J. Syphers, X. Wu
    FRIB, East Lansing, Michigan, USA
  Funding: This material is based on work supported by the National Science Foundation under Grant No. PHY-1102511 and by Michigan State University.
The ReA3 facility at the NSCL at MSU has been designed to reaccelerate rare isotope beams to 3MeV/u. ReA3 consists of a charge to mass selection section, a normal conducting RFQ, a superconducting linac, and transport beam lines that deliver the beam to the experiments. The beam optics designs were developed using COSY and IMPACT. A code with an online model capable of interacting with the control system, such as XAL, developed at SNS, would be ideal for studying this system*. New elements have been added to XAL’s already extensive list of supported devices in order to model elements unique to the NSCL. The benchmarking process has been completed for establishing the use of XAL’s Online Model at the NSCL, and preliminary results from its use at the ReA3 control room have been obtained. The development of applications to fit the needs of the program is ongoing. A summary of the benchmarking process is presented including both transverse and longitudinal studies.
* J. Galambos et al., Proc. PAC 2005, p. 79, (2005); doi: 10.1109/PAC.2005.1590365.
TUPPC048 Online Physics Model Platform 1275
  • P. Chu, Y. Zhang
    FRIB, East Lansing, Michigan, USA
  • C. Benatti, V. Vuppala
    NSCL, East Lansing, Michigan, USA
  • D. Dohan, G. Shen
    BNL, Upton, Long Island, New York, USA
  • J. Wu
    SLAC, Menlo Park, California, USA
  Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
For a complex accelerator such as the Facility for Rare Isotope Beams (FRIB), a transfer matrix based online model might not be sufficient for the entire machine. On the other hand, if introducing another modelling tools, physics applications have to be rewritten for all modelling tools. A platform which can host multiple modelling tools would be ideal for such scenario. Furthermore, the model platform along with infrastructure support can be used not only for online applications but also for offline purposes with multi-particle tracking simulation. In order to achieve such a platform, a set of common physics data structures has to be set. XAL's accelerator hierarchy based data structure is a good choice as the common structure for various models. Application Programming Interface (API) for physics applications should also be defined within a model data provider. A preliminary platform design and prototype is discussed.
TUPPP082 Optimization of a Terawatt Free Electron Laser 1780
  • J. Wu, X. Huang, Y. Jiao, A.U. Mandlekar, T.O. Raubenheimer, S. Spampinati, G. Yu
    SLAC, Menlo Park, California, USA
  • P. Chu
    FRIB, East Lansing, Michigan, USA
  • J. Qiang
    LBNL, Berkeley, California, USA
  Funding: Work supported by U.S. Department of Energy, Office of Basic Energy Sciences, under Contract DE-AC02-76SF00515.
There is great interest in generating a terawatt (TW) hard X-ray free electron laser (FEL) that will enable coherent diffraction imaging of complex molecules like proteins and probe fundamental high-field physics. A feasibility study of producing such pulses was carried out em- ploying a configuration beginning with an SASE amplifier, followed by a "self-seeding" crystal monochromator, and finishing with a long tapered undulator. The undulator tapering profile, the phase advance in the undulator break sections, the quadrupole focusing strength, etc. are parameters to be optimized. A genetic algorithm (GA) is adopted for this multi-dimensional optimization. Concrete examples are given for LCLS/LCLS-II systems.
THPPR014 FRIB High-level Software Architecture 3996
  • P. Chu, T.D. Brown, R. Gaul, S. Peng
    FRIB, East Lansing, Michigan, USA
  • E.T. Berryman, V. Vuppala
    NSCL, East Lansing, Michigan, USA
  Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The Facility for Rare Isotope Beams (FRIB) is setting up its high-level application software architecture. The architecture is based on Service Oriented Architecture, and consists of back-end data storage, client/service infrastructure, control system connectivity, supporting libraries and front-end Graphical User Interface (GUI). The architecture provides online models of FRIB as a service and allows for storage of both structured and non-structured data. The model for structured data is implemented using the Integrated Relational Model of Installed Systems (IRMIS). The GUI is based on Control System Studio (CSS) framework. Libraries, service, data access and GUI tools will be available as Application Programming Interface (API) or plug-ins. The infrastructure and technologies chosen here will utilize the robustness and performance for applications, as well as support quick prototyping for physicists. This paper describes FRIB’s high-level application software architecture and some of the current prototypes.