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RF Characterisation of New Coatings for Future Circular Collider Beam Screens

For the future high energy colliders being under the design at this moment, the choice of a low surface impedance beam screen coating material has become of fundamental importance to ensure sufficiently low beam impedance and consequently guaranteed stable operation at high currents. We have studied...

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Autores principales: Krkotić, Patrick, Calatroni, Sergio, Granados, Xavier, Gutierrez, Joffre, Hannah, Adrian, Malyshev, Oleg B, O'Callaghan, J M, Pérez, Francis, Pont, Montserrat, Puig, Teresa, Romanov, Artur, Tagdulang, Nikki, Telles, Guilherme, Valizadeh, Reza, Whitehead, David
Lenguaje:eng
Publicado: JACoW 2021
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2021-TUPAB399
http://cds.cern.ch/record/2812527
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author Krkotić, Patrick
Calatroni, Sergio
Granados, Xavier
Gutierrez, Joffre
Hannah, Adrian
Malyshev, Oleg B
O'Callaghan, J M
Pérez, Francis
Pont, Montserrat
Puig, Teresa
Romanov, Artur
Tagdulang, Nikki
Telles, Guilherme
Valizadeh, Reza
Whitehead, David
author_facet Krkotić, Patrick
Calatroni, Sergio
Granados, Xavier
Gutierrez, Joffre
Hannah, Adrian
Malyshev, Oleg B
O'Callaghan, J M
Pérez, Francis
Pont, Montserrat
Puig, Teresa
Romanov, Artur
Tagdulang, Nikki
Telles, Guilherme
Valizadeh, Reza
Whitehead, David
author_sort Krkotić, Patrick
collection CERN
description For the future high energy colliders being under the design at this moment, the choice of a low surface impedance beam screen coating material has become of fundamental importance to ensure sufficiently low beam impedance and consequently guaranteed stable operation at high currents. We have studied the use of high-temperature superconducting coated conductors as possible coating materials for the beam screen of the FCC-hh. In addition, amorphous carbon coating and laser-based surface treatment techniques are effective surface treatments to lower the secondary electron yield and minimise the electron cloud build-up. We have developed and adapted different experimental setups based on resonating structures at frequencies below 10 GHz to study the response of these coatings and their modified surfaces under the influence of RF fields and DC magnetic fields up to 9 T. Taking the FCC-hh as a reference, we will show that the surface resistance for REBCO-CCs is much lower than that of Cu. Further we show that the additional surface modifications can be optimised to minimise their impact on the surface impedance. Results from selected coatings will be presented.
id cern-2812527
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2021
publisher JACoW
record_format invenio
spelling cern-28125272022-06-17T19:10:50Zdoi:10.18429/JACoW-IPAC2021-TUPAB399http://cds.cern.ch/record/2812527engKrkotić, PatrickCalatroni, SergioGranados, XavierGutierrez, JoffreHannah, AdrianMalyshev, Oleg BO'Callaghan, J MPérez, FrancisPont, MontserratPuig, TeresaRomanov, ArturTagdulang, NikkiTelles, GuilhermeValizadeh, RezaWhitehead, DavidRF Characterisation of New Coatings for Future Circular Collider Beam ScreensAccelerators and Storage RingsFor the future high energy colliders being under the design at this moment, the choice of a low surface impedance beam screen coating material has become of fundamental importance to ensure sufficiently low beam impedance and consequently guaranteed stable operation at high currents. We have studied the use of high-temperature superconducting coated conductors as possible coating materials for the beam screen of the FCC-hh. In addition, amorphous carbon coating and laser-based surface treatment techniques are effective surface treatments to lower the secondary electron yield and minimise the electron cloud build-up. We have developed and adapted different experimental setups based on resonating structures at frequencies below 10 GHz to study the response of these coatings and their modified surfaces under the influence of RF fields and DC magnetic fields up to 9 T. Taking the FCC-hh as a reference, we will show that the surface resistance for REBCO-CCs is much lower than that of Cu. Further we show that the additional surface modifications can be optimised to minimise their impact on the surface impedance. Results from selected coatings will be presented.JACoWoai:cds.cern.ch:28125272021
spellingShingle Accelerators and Storage Rings
Krkotić, Patrick
Calatroni, Sergio
Granados, Xavier
Gutierrez, Joffre
Hannah, Adrian
Malyshev, Oleg B
O'Callaghan, J M
Pérez, Francis
Pont, Montserrat
Puig, Teresa
Romanov, Artur
Tagdulang, Nikki
Telles, Guilherme
Valizadeh, Reza
Whitehead, David
RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title_full RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title_fullStr RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title_full_unstemmed RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title_short RF Characterisation of New Coatings for Future Circular Collider Beam Screens
title_sort rf characterisation of new coatings for future circular collider beam screens
topic Accelerators and Storage Rings
url https://dx.doi.org/10.18429/JACoW-IPAC2021-TUPAB399
http://cds.cern.ch/record/2812527
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