Chopper System (Neutrons) for BEER / ESS - in 2 Lots

1 Chopper System (Neutrons) consisting of 7 assemblies, divided in two Lots. The European Spallation Source (ESS) ERIC (European Research Infrastructure Consortium) as joint European project is a large scale, multinational research facility being built in Lund, Sweden, with a data management and software centre in Copenhagen, Denmark. The European Commission has, by decision (EU) 2015/1478 of 19 August 2015, established ESS as responsible for constructing, operating, developing and decommissioning the Facility. The Swedish and Danish Governments have agreed to host ESS with Sweden as the host member state in accordance with Regulation (EC) No 723/2009. The facility will be a world-leading centre for materials research and life sciences using neutrons and will host the world"s most powerful neutron source. BEER is a time-of-flight engineering diffractometer being built at the ESS. BEER is intended to enable studies of condensed matter by observing the scattering of thermal or cold neutrons by a specimen. The unique feature of BEER will be that a large number of short pulses are extracted from the long pulse of the ESS, which is unique after its completion, resulting in significantly higher neutron flux at the sample and thus higher intensity and broader resolution range while providing comprehensive detector coverage. The pulse structuring and wavelength band selection functions of neutron chopper systems are central to the operation of instruments at ESS. High performance systems will be required in order to access as much as possible of the long pulse simultaneously increasing the flux available and permitting access to the large dynamical range of the pulse. During the specification, design and implementation of these complex systems it is also of utmost importance to consider the serviceability, maintainability and accessibility of the individual systems and units in order and ensure the highest instrument availability achievable. In this context Hereon is issuing a tender for 1 Neutron Chopper System consisting of 7 assemblies that include 5 disc choppers with motor controllers and monitoring system and two lower enclosures of a split housing module divided in two Lots: Lot 1: 2 Pulse shaping (PSC) Chopper assemblies + 1 lower enclosure of a split housing module, 1 Frame definition (FC1) Chopper assembly 1 Modulation (MC) Chopper assembly + 1 lower enclosure of a split housing module Lot 2: 1 Frame definition (FC2) Chopper assembly The Scope of Work includes all necessary tasks and deliverables for the operation of the Chopper System, as defined in the requirement specification: I. Preliminary Design II. Design III. Production and assembly IV. Factory acceptance tests (FAT) V. Delivery to ESS storage facility VI. Installation of the complete System VII. Site acceptance test (SAT) of the complete systems at ESS VIII. other stipulated services in accordance with the requirements of this specification IX. Documentation in electronic and paper copy, including quality assurance documentation