Status of the ESS cryogenic system

Weisend, J. G.; Darve, Christine; Gallimore, S.; Hees, Wolfgang; Jurns, John M.; Köttig, Torsten; Ladd, P.; Molloy, Stephen; Parker, Thomas; Wang, Xilong

doi:10.1063/1.4860761

Cited by 6 publications

(6 citation statements)

References 4 publications

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Section: Cryogenic Systemsmentioning

confidence: 99%

“…The ACCP is the largest and most complicated of the ESS cryoplants. The cooling requirements and the initial concept design have been developed and improved over the years [107][108][109][110][111].Architecture.The ACCP consists of a warm compressor, oil handling and gas management station, located in the ACCP compressor building, and one single coldbox, located in the cold box building. The simplified block diagram in figure 60 shows the main components of the ACCP, consisting of:…”

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The European Spallation Source Design

et al. 2017

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The ESS Design: Accelerator 6The ESS Design: Target 66The ESS Design: Controls 93The ESS Design: Conventional Facilities 109Physica ScriptaPhys. Scr. 93 (2018) 014001 (121pp) https://doi.org/10. 1088/1402-4896/aa9bff This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercialNoDerivs 3.0 licence. Content from this work may be used under the terms of the Creative Commons Attribution-NonCommercialNoDerivs 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Neutron scattering is a well-developed and extensively used means to get access to fundamental properties of biological matter as well as of physical materials. Until the end of the twentieth century that was mainly practiced with-and limited in performance by-the continuous flux of neutrons from ageing nuclear reactors (e.g. the Institut Laue-Langevin (ILL), the flagship of neutron research in Europe and in the world) [1]). Looking forward to the following two decades, an OECD report published in 1998 diagnosed the foreseeable decrease of the number of operational facilities [2] and the need to progress in performance. Considering the high scientific interest and the increasing importance of the subject for society at large, the report concluded by strongly recommending the construction of next generation neutron sources in America, Europe and Asia. Pulsed spallation neutron sources (SNS) using a proton beam power exceeding 1 MW were specifically mentioned as the most interesting high performance facilities in the future landscape of neutron laboratories.The USA was the first country to follow this advice by building the SNS in the Oak Ridge National Laboratory (ORNL) which started in 2006 [3, 4]. Japan followed in 2009 with the Japan Proton Accelerator Research Centre (J-PARC) in Tokai [5,6]. In Europe, the subject was part of a concerted effort to further develop the European world-leading largescale research infrastructures suite. In 2003, the European Strategy Forum for Research Infrastructures (ESFRI), set up by the Research Ministries of the Member States and associated countries, concluded that a 5 MW long-pulse, single target station layout with nominally 22 'public' instruments was the optimum technical reference design for an European Spallation Source (ESS) that would meet the needs of the European science community in the second quarter of the century [7].Six years later, in 2009, it materialised in a real project with the adoption of the site of Lund (Sweden). A preconstruction phase followed until the end of 2013 during which the design was finalised [8]. Construction then started with the first neutron beams planned to be available in 2019, and the ESS facility to be operational at full performance in 2025.2 Description 2.1 Principle and specifics. The high level parameters of ESS are shown in table 1. As at SNS and J-PARC, neutrons at ESS are produced by spallation, when the 2 GeV protons hit the meta...

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Section: Cryogenic Systemsmentioning

confidence: 99%

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confidence: 99%

The European Spallation Source Design

et al. 2017

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“…The cryogenic transfer lines feeding the cryomodule are described elsewhere [9]. The operating pressure ranges from 1.9 MPa for the thermal shield piping to 3.1 kPa for the saturated helium tank.…”

Section: Heat Load and Cryogenicsmentioning

confidence: 99%

“…Each spoke cryomodule is connected to the cryogenic transfer line (CTL) via one valve box. A 2 K heat exchanger is located inside the jumper connection, on the cryomodule side of the vacuum barrier [9].…”

Section: Ess Spoke Cavity Cryomodule Designmentioning

confidence: 99%

The ESS spoke cavity cryomodules

Bousson¹,

Darve²,

Duthil³

et al. 2014

AIP Conference Proceedings

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Abstract. The European Spallation Source (ESS) is a multi-disciplinary research centre under design and construction in Lund, Sweden. This new facility is funded by a collaboration of 17 European countries and is expected to be up to 30 times brighter than today's leading facilities and neutron sources. The ESS will enable new opportunities for researchers in the fields of life sciences, energy, environmental technology, cultural heritage and fundamental physics. A 5 MW long pulse proton accelerator is used to reach this goal. The pulsed length is 2.86 ms, the repetition frequency is 14 Hz (4 % duty cycle), and the beam current is 62.5 mA. It is composed of one string of spoke cavity cryomodule and two strings of elliptical cavity cryomodules. This paper introduces the thermo-mechanical design and expected operation of the ESS spoke cavity cryomodules. These cryomodules contain two double spoke bulk Niobium cavities operating at 2 K and at a frequency of 352.21 MHz. The superconducting section of the Spoke Linac accelerates the beam from 90 MeV to 220 MeV. A Spoke Cavity Cryomodule Technology Demonstrator will be built and tested in order to validate the ESS series production.

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“…The ACCP is the largest and most complicated of the ESS cryoplants. The cooling requirements and the initial concept design have been developed and improved over the years [4][5][6][7][8][9]. The ACCP was procured in an open bid procedure, which covers the design, the warm compressor station and the cold box, the plant control system, installation and commissioning.…”

Section: Introductionmentioning

confidence: 99%

ESS Accelerator Cryoplant Process Design

Wang

Arnold

Hees

et al. 2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The European Spallation Source (ESS) is a neutron-scattering facility being built with extensive international collaboration in Lund, Sweden. The ESS accelerator will deliver protons with 5 MW of power to the target at 2.0 GeV, with a nominal current of 62.5 mA. The superconducting part of the accelerator is about 300 meters long and contains 43 cryomodules. The ESS accelerator cryoplant (ACCP) will provide the cooling for the cryomodules and the cryogenic distribution system that delivers the helium to the cryomodules. The ACCP will cover three cryogenic circuits: Bath cooling for the cavities at 2 K, the thermal shields at around 40 K and the power couplers thermalisation with 4.5 K forced helium cooling. The open competitive bid for the ACCP took place in 2014 with Linde Kryotechnik AG being selected as the vendor. This paper summarizes the progress in the ACCP development and engineering. Current status including final cooling requirements, preliminary process design, system configuration, machine concept and layout, main parameters and features, solution for the acceptance tests, exergy analysis and efficiency is presented.

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Status of the ESS cryogenic system

Cited by 6 publications

References 4 publications

The European Spallation Source Design

The European Spallation Source Design

The ESS spoke cavity cryomodules

ESS Accelerator Cryoplant Process Design

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