Author: Richter, T.S.
Paper Title Page
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]  
 
WEPGF064
Developing the Neutron Event Data Infrastructure for a Greenfield Site  
 
  • T.S. Richter, M.E. Hagen, T. Holm Rod, J.W. Taylor
    ESS, Copenhagen, Denmark
 
  The European Spallation Source (ESS) a neutron facility that is being build on a greenfield site with no existing host organisation but with contributions from 17 partner nations. Within it the Data Management and Software Centre (DMSC) is responsible for delivering an integrated package for a scientific control interface for data acquisition, the data readout, processing, visualisation, analysis and data management. ESS will generate data almost exclusively in event mode, recording every neutron detection individually with spatial and time coordinates. This offers the most flexibility for later processing, but requires an extensive infrastructure to meet the goals of online visualisation. In this paper an overview of what can be solved with existing technology and where new developments are needed, will be presented. The data readout, streaming and file writing aspects will be highlighted specifically.