Design of Radiation Hard Spare Units for the Orbit Corrector Dipoles of LHC

Due to the High Luminosity upgrade of the Large Hadron Collider (HL-LHC), the orbit corrector dipoles located just before the interaction points of the accelerator will receive significantly increased gamma radiation doses, i.e., up to 20 MGy over the HL-LHC lifetime. Since these magnets were not de...

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Bibliographic Details
Published in:	IEEE transactions on applied superconductivity Vol. 30; no. 4; pp. 1 - 5
Main Authors:	Louzguiti, Alexandre, Cerutti, Francesco, Contat, Pierre-Antoine, de Sousa, Daniela Fagundes, Kirby, Glyn, Lepoittevin, Benoit, Liberale, Mattia, Mazet, Jacky, Ravaioli, Emmanuele, Sahner, Thomas, Schoerling, Daniel, Tavares, Sandra Sequeira, Tsinganis, Andrea, Vallone, Giorgio
Format:	Journal Article
Language:	English
Published:	New York IEEE 01-06-2020 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:	Design Dipoles Gamma radiation Gamma rays High Luminosity Large Hadron Collider HL-LHC Insulation Large Hadron Collider Luminosity Magnet design Magnetic noise Magnetic shielding Magnets Radiation effects Superconducting magnet for accelerators Superconducting magnets Wires
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Summary:	Due to the High Luminosity upgrade of the Large Hadron Collider (HL-LHC), the orbit corrector dipoles located just before the interaction points of the accelerator will receive significantly increased gamma radiation doses, i.e., up to 20 MGy over the HL-LHC lifetime. Since these magnets were not designed to withstand such high gamma doses, new MCBC and MCBY magnets have to be designed and produced using radiation hard impregnation insulation and materials. In this paper, we describe both the gamma radiation campaign we are performing to determine the radiation hardness of the present MCBC and MCBY magnets and the new design and technologies that we have selected for the manufacturing of radiation hard spare units. We also discuss the impact of failing MCBC and MCBY magnets on the LHC and the foreseen alternative solutions.
ISSN:	1051-8223 1558-2515
DOI:	10.1109/TASC.2020.2972223