Author: Korhonen, T.
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
TUB3O03 The Modular Control Concept of the Neutron Scattering Experiments at the European Spallation Source ESS 1
  • T. Gahl, R.J. Hall-Wilton, O. Kirstein, T. Korhonen, T.S. Richter, A. Sandström, I. Sutton, J.W. Taylor
    ESS, Copenhagen, Denmark
  The European Spallation Source (ESS) in Lund, Sweden has just entered into neutron beam line construction starting detailed design in 2015. As a collaboration of 17 European countries the majority of hardware devices will be provided in-kind. This presents numerous technical and organizational challenges for the construction and the integration of the neutron instrumentation into the facility wide infrastructure; notably the EPICS control network and the facilities absolute timing system. In this contribution we present a strategy for the modularity of the instruments hardware with well-defined standardized functionality and a minimized number of control & data interfaces. Key point of the strategy is the time stamping of all readings from the instruments control electronics extending the event mode data acquisition from detected neutron events to all metadata. This gives the control software the flexibility necessary to adapt the functionality of the instruments to the demands of each single experimental run. Examples of the advantages of that approach in classical motion control as well as in complex robotics systems and matching hardware requirements necessary, is discussed.
* S.Peggs et al., ESS Technical Design Report(ESS-2013-0001, 2013)
** T.Gahl et al., Modularity & Integration of Event Mode Data Acquisition and Instrument Control for ESS, Proc. of ICANS XXI(2015)
slides icon Slides TUB3O03 [2.111 MB]  
TUC3O03 Development and Realisation of the ESS Machine Protection Concept 1
  • A. Nordt, R. Andersson, T. Korhonen, A. Monera Martinez, M. Zaera-Sanz
    ESS, Lund, Sweden
  • A. Apollonio, R. Schmidt
    CERN, Geneva, Switzerland
  • C. Hilbes
    ZHAW, Winterthur, Switzerland
  ESS is facing extremely high beam availability requirements and is largely relying on custom made, very specialised, and expensive equipment for its operation. The proton beam power with an average of 5MW per pulse will be unprecedented and its uncontrolled release can lead to serious damage of the delicate equipment, causing long shutdown periods, inducing high financial losses and, as a main point, interfering drastically with international scientific research programs relying on ESS operation. Implementing a fit-for-purpose machine protection concept is one of the key challenges in order to mitigate these risks. The development and realisation of the measures needed to implement such concept to the correct level in case of a complex facility like the ESS, requires a systematic approach, and will be discussed in this paper.  
slides icon Slides TUC3O03 [11.927 MB]  
WEA3O02 Recent Advancements and Deployments of EPICS Version 4 1
  • G.R. White, M.V. Shankar
    SLAC, Menlo Park, California, USA
  • A. Arkilic, L.R. Dalesio, M.A. Davidsaver, M.R. Kraimer, N. Malitsky, B.S. Martins
    BNL, Upton, Long Island, New York, USA
  • S.M. Hartman, K.-U. Kasemir
    ORNL, Oak Ridge, Tennessee, USA
  • D.G. Hickin
    DLS, Oxfordshire, United Kingdom
  • A.N. Johnson, S. Veseli
    ANL, Argonne, Ilinois, USA
  • T. Korhonen
    ESS, Lund, Sweden
  • R. Lange
    ITER Organization, St. Paul lez Durance, France
  • M. Sekoranja
    Cosylab, Ljubljana, Slovenia
  • G. Shen
    FRIB, East Lansing, Michigan, USA
  EPICS version 4 is a set of software modules that add to the base of the EPICS toolkit for advanced control systems. Version 4 adds the possibility of process variable values of structured data, an introspection interface for dynamic typing plus some standard types, high-performance streaming, and a new front-end processing database for managing complex data I/O. A synchronous RPC-style facility has also been added so that the EPICS environment supports service-oriented architecture. We introduce EPICS and the new features of version 4. Then we describe selected deployments, particularly for high-throughput experiment data transport, experiment data management, beam dynamics and infrastructure data.  
slides icon Slides WEA3O02 [2.409 MB]  
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.