IPAC2014 - List of Authors (Hees, W.)

Paper	Title	Page
WEPRI109	The ESS Cryogenic System	2756
	P. Arnold, J. Fydrych, W. Hees, J.M. Jurns, X. Wang, J.G. Weisend ESS, Lund, Sweden
	Cryogenic cooling is vital for large sections at ESS. The ESS cryogenic system comprises three separate helium refrigeration/liquefaction plants and an extensive cryodistribution system. Mainly there is a 2.0 GeV proton linac using superconducting RF cavities operating at 2 K. In addition to cooling the SRF cavities, cryogenics is also used for the cold hydrogen moderator surrounding the target. There is also a cryogenic installation associated with the site acceptance testing of the ESS cryomodules. ESS furthermore uses both liquid helium and liquid nitrogen in a number of the neutron instruments. The test stand cryoplant will as well provide liquid helium for neutron instrument sample environments and comprise a helium purification unit. Together with the gas management, helium recovery and a considerable cold and warm storage system, cryogenics form a substantial part of ESS. This paper describes the current conceptual design of the ESS cryogenic system including the expected heat loads and operating modes for the linac cryoplant. Challenges associated with the required high efficiency, reliability and turn-down capability will be discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI109
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THPRI106	Specialized Technical Services at ESS	4028
	J.G. Weisend, P. Arnold, J. Fydrych, W. Hees, G. Hulla, F. Jensen, J.M. Jurns, P. Ladd, G. Lanfranco, H. Spoelstra, X. Wang ESS, Lund, Sweden
	The European Spallation Source (ESS), a world class lab for neutron science currently under construction in Lund, Sweden requires a number of technical services that extend across the various project areas (accelerator, target and neutron science). These services include: cryogenics, vacuum and technical electrical and cooling systems. This effort constitutes more than 70 million Euros of construction cost. Rather than have separate support groups in each of the project areas, ESS has created a Specialized Technical Services group within the Accelerator Division to provide these services. This approach permits standardization, development of synergies and improved communication. The STS group also provides cryomodule testing and accelerator infrastructure and installation to the accelerator project. This paper describes the scope of work, current design status and future plans for Specialized Technical services at ESS.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI106
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

The ESS Cryogenic System

2756

P. Arnold, J. Fydrych, W. Hees, J.M. Jurns, X. Wang, J.G. Weisend
ESS, Lund, Sweden

Cryogenic cooling is vital for large sections at ESS. The ESS cryogenic system comprises three separate helium refrigeration/liquefaction plants and an extensive cryodistribution system. Mainly there is a 2.0 GeV proton linac using superconducting RF cavities operating at 2 K. In addition to cooling the SRF cavities, cryogenics is also used for the cold hydrogen moderator surrounding the target. There is also a cryogenic installation associated with the site acceptance testing of the ESS cryomodules. ESS furthermore uses both liquid helium and liquid nitrogen in a number of the neutron instruments. The test stand cryoplant will as well provide liquid helium for neutron instrument sample environments and comprise a helium purification unit. Together with the gas management, helium recovery and a considerable cold and warm storage system, cryogenics form a substantial part of ESS. This paper describes the current conceptual design of the ESS cryogenic system including the expected heat loads and operating modes for the linac cryoplant. Challenges associated with the required high efficiency, reliability and turn-down capability will be discussed.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI109

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRI106

Specialized Technical Services at ESS

4028

J.G. Weisend, P. Arnold, J. Fydrych, W. Hees, G. Hulla, F. Jensen, J.M. Jurns, P. Ladd, G. Lanfranco, H. Spoelstra, X. Wang
ESS, Lund, Sweden

The European Spallation Source (ESS), a world class lab for neutron science currently under construction in Lund, Sweden requires a number of technical services that extend across the various project areas (accelerator, target and neutron science). These services include: cryogenics, vacuum and technical electrical and cooling systems. This effort constitutes more than 70 million Euros of construction cost. Rather than have separate support groups in each of the project areas, ESS has created a Specialized Technical Services group within the Accelerator Division to provide these services. This approach permits standardization, development of synergies and improved communication. The STS group also provides cryomodule testing and accelerator infrastructure and installation to the accelerator project. This paper describes the scope of work, current design status and future plans for Specialized Technical services at ESS.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI106

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)