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Spallation target cryogenic cooling design challenges at the European Spallation Source

Jurns, John LU ; Ringner, J.; Quack, H.; Arnold, Philipp LU ; Weisend, John LU and Lyngh, Daniel LU (2015) Cryogenic Engineering Conference (CEC) / International Cryogenic Materials Conference (ICMC) In IOP Conference Series: Materials Science and Engineering 101. p.012082-012082
Abstract
The European Spallation Source (ESS) project is a neutron spallation source research facility currently being designed and built outside of Lund, Sweden. A linear accelerator delivers a 5 MW, 2.0 GeV, 62.5 mA proton beam to a spallation target to generate fast neutrons. Supercritical hydrogen circulates through two moderators surrounding the target, and transforms the fast neutrons emitted into slow neutrons, which are the final form of useful radiation. The supercritical hydrogen is in turn cooled from a helium cryogenic plant operating at 15-20 K. The supercritical cryogenic hydrogen circuit is a dynamic system, subject to significant changes in heat load. Proper pressure control of this system is critical to assure safe operation. The... (More)
The European Spallation Source (ESS) project is a neutron spallation source research facility currently being designed and built outside of Lund, Sweden. A linear accelerator delivers a 5 MW, 2.0 GeV, 62.5 mA proton beam to a spallation target to generate fast neutrons. Supercritical hydrogen circulates through two moderators surrounding the target, and transforms the fast neutrons emitted into slow neutrons, which are the final form of useful radiation. The supercritical hydrogen is in turn cooled from a helium cryogenic plant operating at 15-20 K. The supercritical cryogenic hydrogen circuit is a dynamic system, subject to significant changes in heat load. Proper pressure control of this system is critical to assure safe operation. The interaction between the hydrogen system and helium cryoplant poses unique challenges. This paper investigates the impact of the hydrogen system constraints on operation and control of the helium cryoplant, and suggests design options for the helium circuit. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
IOP Conference Series: Materials Science and Engineering
volume
101
pages
012082 - 012082
publisher
IOP Publishing
conference name
Cryogenic Engineering Conference (CEC) / International Cryogenic Materials Conference (ICMC)
external identifiers
  • wos:000368434700082
  • scopus:84959866358
ISSN
1757-8981
1757-899X
DOI
10.1088/1757-899X/101/1/012082
language
English
LU publication?
yes
id
1e3eabe2-6afa-4800-92c3-4d0e03010580 (old id 8739060)
date added to LUP
2016-02-29 12:22:05
date last changed
2017-01-01 04:13:19
@inproceedings{1e3eabe2-6afa-4800-92c3-4d0e03010580,
  abstract     = {The European Spallation Source (ESS) project is a neutron spallation source research facility currently being designed and built outside of Lund, Sweden. A linear accelerator delivers a 5 MW, 2.0 GeV, 62.5 mA proton beam to a spallation target to generate fast neutrons. Supercritical hydrogen circulates through two moderators surrounding the target, and transforms the fast neutrons emitted into slow neutrons, which are the final form of useful radiation. The supercritical hydrogen is in turn cooled from a helium cryogenic plant operating at 15-20 K. The supercritical cryogenic hydrogen circuit is a dynamic system, subject to significant changes in heat load. Proper pressure control of this system is critical to assure safe operation. The interaction between the hydrogen system and helium cryoplant poses unique challenges. This paper investigates the impact of the hydrogen system constraints on operation and control of the helium cryoplant, and suggests design options for the helium circuit.},
  author       = {Jurns, John and Ringner, J. and Quack, H. and Arnold, Philipp and Weisend, John and Lyngh, Daniel},
  booktitle    = {IOP Conference Series: Materials Science and Engineering},
  issn         = {1757-8981},
  language     = {eng},
  pages        = {012082--012082},
  publisher    = {IOP Publishing},
  title        = {Spallation target cryogenic cooling design challenges at the European Spallation Source},
  url          = {http://dx.doi.org/10.1088/1757-899X/101/1/012082},
  volume       = {101},
  year         = {2015},
}