Institut de recherche sur les lois fondamentales de l'Univers

Direction de la recherche fondamentale

Claire ANTOINE

Service des Accelerateurs, de Cryogenie et de Magnetisme

+33 1 69 08 73 28

+33 1 69 08 64 42

Fonction

Physicist

SRF R&D : surface and material studies for superconducting radiofrequency cavities

Sujets de recherche

- Study of internal contamination of (Nb), and influence on its superconducting properties.

• Surface studies: first evidence of segregation of impurities (H, O, N, F....) at oxide-metal interface and grain boundaries, surface treatment evaluation, fine exploration of the surface of niobium vs surface treatment.

• Morphologic + topologic surface study, influence of relief on radiofrequency EM field.

• Superconductivity : understanding present niobium limitation, developpement of new composite supreconductors.

- Study of superficial contamination

• Superficial contamination studies (dust): contaminating steps, influence of particles' shape...

• Ultra clean techniques development: concept of closed chemistry (first prototype), advisor for the design of the DESY chemical lab. + clean room.

- Niobium metallurgy, influence on its mechanical and forming properties.

• Study of the supplied metal for cavity fabrication, analysis of forming failure.

• Start of an industrial transfer project on hydroforming of Nb tubes.

• development of mettalurgical and machining specifications for Niobium

- After Niobium : a new family of nano-composite superconductors.

• development of layered composite superconductors specially designed for SRF applications.

CV

1989: PhD in physical sciences @ the Molecular Chemistry Laboratory (DLPC/SCM) at CEA-Saclay. Ph.D. institution: Orsay Ph.D. advisor: Kahn, O.. Subject : molecular electronics : synthesis and characterization of molecular thick semiconductors.
1990-Today : Surface and material studies for superconducting radiofrequency cavities
1999-2001 : Program Coordination CEA -IN2P3 on SRF R&D
2002-2003 : Deputy head of the R&D in superconductivity laboratory
2003-2005 : Work package manager of WP5.1 (electropolishing)of the CARE-SRF European project
2006-2007 : Head of the « SRF materials'lab » @ Fermilab, « Midwestern SRF material collaboration (ACS-Wisconsin/NU University/MSU/ANL/FNAL)coordination.
2009: HDR ("Habilitation à diriger des recherches") in solid state physics
2013: EUCCARD2, WP12 (innovative RF technologies), Task leader WP12.2 -thin films.