Status of High Temperature Vacuum Heat Treatment Program at IPN Orsay

Mohammed Fouaidy (1) , Matthieu Baudrier (2) , Pol Carbonnier (2) , Enrico Cenni (2) , Frederic Chatelet (1) , Vincent Delpech (1) , Elise Fayette (2) , Francois Galet (1) , Xavier Hanus (2) , David Le Drean (1) , David Longuevergne (1) , Richard Martret (1) , Luc Maurice (2) , Guillaume Olry (1) , Thomas Proslier (2) , Thierry Pepin-Donat (1) , Dominique Roudier (2) , Patrick Sahuquet (2) , Christophe Servouin (2)

1 IPNO - Institut de Physique Nucléaire d'Orsay
2 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers

In the framework of ESS, a vacuum furnace dedicated to High Temperature Heat Treatment under Vacuum (VH2T2) of SRF bulk Nb cavities was developed and commissioned in May 2016. This furnace is currently used for interstitial hydrogen removal (10h00 @ 650 °C) of two type of cavities: 1) the whole series of 26 ESS 352 MHz spoke resonators equipped with their Ti LHe tank well, 2) some prototypes of ESS high beta and medium beta cavities. Up to know IPN Orsay VH2T2 (10h00 @ 650 °C) was successfully applied to more than 16 cavities. In this paper we will first report about these VH2T2 tests. Finally, we have just started testing nitrogen infusion and nitrogen doping processes on samples and 1.3 GHz cavities: the preliminary results will be discussed.

Mots clés: cavity; SRF; niobium; MMI; vacuum

Domaines: Physique des accélérateurs [physics.acc-ph]

Mohammed Fouaidy, Matthieu Baudrier, Pol Carbonnier, Enrico Cenni, Frederic Chatelet, et al.. Status of High Temperature Vacuum Heat Treatment Program at IPN Orsay. 19th International Conference on RF Superconductivity (SRF 2019), Jun 2019, Dresden, Germany. pp.TUP019, ⟨10.18429/JACoW-SRF2019-TUP019⟩. ⟨hal-02497823⟩