Author: Rescic, M.     [Reščič, M.]
Paper Title Page
A Generic Approach for Integration of Neutron Choppers into the Integrated Control System of the European Spallation Source ESS  
  • N. Holmberg, T. Gahl, O. Kirstein, T. Korhonen, M. Reščič, A. Sandström, I. Sutton
    ESS, Lund, Sweden
  • P. Galsworthy
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  • W.M. McHargue
    ORNL, Oak Ridge, Tennessee, USA
  The European Spallation Source (ESS) in Lund, Sweden has just entered the beam line construction phase with 3 neutron instruments. As a collaboration of 17 European countries, numerous technical and organizational challenges arise for the construction and the integration of the instruments into the facility wide infrastructure*. We present a strategy for integration of multiple types of neutron choppers, both in-kind contributed and commercially procured devices, into the facility infrastructure; mainly with interfaces to the central EPICS data network and the facility timing system. A key point is the low level conversion of the data flow, to and from the central control system, into a generic structure, to make different types of neutron choppers look identical from above network layers. The use of event time-stamping and reduction of low level device interfaces increases the amount of usable experiment data through passing data discard decisions to more advanced experiment data processing units at higher levels in the experiment control system**. We present the advantages of this approach in terms of standardization and flexibility for commissioning, maintenance and monitoring.
*Peggs et al, ESS Technical Design Report, ESS-2013-0001(2013)**Gahl et al, Hardware Aspects, Modularity and Integration of an Event Mode Data Acquisition and Instrument Control for the ESS, ICANS XXI
FRB3O02 Status of the European Spallation Source Control System 1
  • T. Korhonen, R. Andersson, F. Bellorini, S.L. Birch, D.P. Brodrick, H. Carling, J. Cereijo García, R.N. Fernandes, L. Fernandez, B. Gallese, S.R. Gysin, E. Laface, N. Levchenko, M. Mansouri Sharifabad, R. Mudingay, A. Nordt, D. Paulic, D.P. Piso, K. Rathsman, M. Reščič, G. Trahern, M. Zaera-Sanz
    ESS, Lund, Sweden
  • N. Claesson, U. Rojec, K. Strniša, A.A. Söderqvist
    Cosylab, Ljubljana, Slovenia
  The European Spallation Source (ESS) is a collaboration of 17 European countries to build the world's most powerful neutron source for research. ESS has entered the construction phase and the plan is to produce first neutrons by 2019 and to complete the construction by 2025. The Integrated Control System Division (ICS) is responsible to provide control systems for the whole facility. The unprecented beam power of 5 MW and the construction of the facility with many components contributed in-kind presents a number of challenges to the control system. Systems have to be specified so that the work can be effectively shared between the contributors and on-site staff. Control system components need to provide a level of performance that can support the operation of the facility, be standardized so that integration to the facility can be done during a short installation period and be maintainable by the in-house staff after the construction has finished. This paper will outline the plans and principles that will be used to construct the control systems. The selected technologies and standards will be presented, as well as the plans for integration.