Cargando…

Thermal analysis and cryogenics of the Baby-IAXO magnet

Baby-IAXO is a new helioscope, a demonstration version of the proposed full-size IAXO, the International Axions Observatory. It is currently under design and once installed it will search via the Primakoff effect for axions or axion-like particles (ALPs) originating in the Sun. Axions can transform...

Descripción completa

Detalles Bibliográficos
Autores principales: Silva, H F P, Dudarev, A, Bykovskiy, N, de Sousa, P Borges, ten Kate, H H J
Lenguaje:eng
Publicado: IOP 2020
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1757-899X/755/1/012132
http://cds.cern.ch/record/2725616
_version_ 1780966042591297536
author Silva, H F P
Dudarev, A
Bykovskiy, N
de Sousa, P Borges
ten Kate, H H J
author_facet Silva, H F P
Dudarev, A
Bykovskiy, N
de Sousa, P Borges
ten Kate, H H J
author_sort Silva, H F P
collection CERN
description Baby-IAXO is a new helioscope, a demonstration version of the proposed full-size IAXO, the International Axions Observatory. It is currently under design and once installed it will search via the Primakoff effect for axions or axion-like particles (ALPs) originating in the Sun. Axions can transform into photons in the presence of a significant magnetic field, and then be detected. The superconducting magnet for Baby-IAXO comprises two 10 m long racetrack coils, spaced by 0.8 m, operated in a quadrupole configuration and generating an average magnetic field of 2.1 T in the two 700 mm diameter free bores for axion-to-photons decay positioned in between the coils. Cool down and operational cryogenic requirements are handled by a combination of single and double stage cryocoolers. For the cool down of the 18.5 t cold mass within 22 days and for current leads cooling, the use of powerful single stage cryocoolers is of paramount importance. The cooling power is distributed across the cold mass and thermal shield using helium gas flow enforced by cryocirculators. The design of the 10 kA conduction cooled current leads is presented as well, since at 70 K these represent the dominant heat load. The cryogenic system allows for a constant heat load of 1.2 kW at the first stage and 8.5 W at the 4.2 K cold mass. Alternatively, the magnet may be operated in persistent mode, thereby reducing the heat load and the number of cryocoolers. It requires a more complex cooling circuit, implementation of a 10 kA persistent mode switch, and a delicate balance of energizing and operational heat loads.
id oai-inspirehep.net-1808228
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2020
publisher IOP
record_format invenio
spelling oai-inspirehep.net-18082282020-07-31T21:30:08Zdoi:10.1088/1757-899X/755/1/012132http://cds.cern.ch/record/2725616engSilva, H F PDudarev, ABykovskiy, Nde Sousa, P Borgesten Kate, H H JThermal analysis and cryogenics of the Baby-IAXO magnetDetectors and Experimental TechniquesBaby-IAXO is a new helioscope, a demonstration version of the proposed full-size IAXO, the International Axions Observatory. It is currently under design and once installed it will search via the Primakoff effect for axions or axion-like particles (ALPs) originating in the Sun. Axions can transform into photons in the presence of a significant magnetic field, and then be detected. The superconducting magnet for Baby-IAXO comprises two 10 m long racetrack coils, spaced by 0.8 m, operated in a quadrupole configuration and generating an average magnetic field of 2.1 T in the two 700 mm diameter free bores for axion-to-photons decay positioned in between the coils. Cool down and operational cryogenic requirements are handled by a combination of single and double stage cryocoolers. For the cool down of the 18.5 t cold mass within 22 days and for current leads cooling, the use of powerful single stage cryocoolers is of paramount importance. The cooling power is distributed across the cold mass and thermal shield using helium gas flow enforced by cryocirculators. The design of the 10 kA conduction cooled current leads is presented as well, since at 70 K these represent the dominant heat load. The cryogenic system allows for a constant heat load of 1.2 kW at the first stage and 8.5 W at the 4.2 K cold mass. Alternatively, the magnet may be operated in persistent mode, thereby reducing the heat load and the number of cryocoolers. It requires a more complex cooling circuit, implementation of a 10 kA persistent mode switch, and a delicate balance of energizing and operational heat loads.IOPoai:inspirehep.net:18082282020
spellingShingle Detectors and Experimental Techniques
Silva, H F P
Dudarev, A
Bykovskiy, N
de Sousa, P Borges
ten Kate, H H J
Thermal analysis and cryogenics of the Baby-IAXO magnet
title Thermal analysis and cryogenics of the Baby-IAXO magnet
title_full Thermal analysis and cryogenics of the Baby-IAXO magnet
title_fullStr Thermal analysis and cryogenics of the Baby-IAXO magnet
title_full_unstemmed Thermal analysis and cryogenics of the Baby-IAXO magnet
title_short Thermal analysis and cryogenics of the Baby-IAXO magnet
title_sort thermal analysis and cryogenics of the baby-iaxo magnet
topic Detectors and Experimental Techniques
url https://dx.doi.org/10.1088/1757-899X/755/1/012132
http://cds.cern.ch/record/2725616
work_keys_str_mv AT silvahfp thermalanalysisandcryogenicsofthebabyiaxomagnet
AT dudareva thermalanalysisandcryogenicsofthebabyiaxomagnet
AT bykovskiyn thermalanalysisandcryogenicsofthebabyiaxomagnet
AT desousapborges thermalanalysisandcryogenicsofthebabyiaxomagnet
AT tenkatehhj thermalanalysisandcryogenicsofthebabyiaxomagnet