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TY - CONF AU - Gonnella, D. AU - Liepe, M. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - New Insights into Heat Treatment of SRF Cavities in a Low-pressure Nitrogen Atmosphere J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - Recent results from Cornell and FNAL have shown that superconducting RF cavities given a heat treatment in a nitrogen atmosphere of a few mTorr display an increase in Q0 with increasing accelerating field, opposite to the medium field Q slope usually observed. Three cavities was prepared at Cornell using this method and subsequently tested after different amounts of material removal. Cavity performance and material properties were extracted for each cavity and correlated with material removal. This has given new insights into how material properties and the anti-Q slope depend on cavity preparation. PB - JACoW CP - Geneva, Switzerland SP - 2634 EP - 2637 KW - cavity KW - niobium KW - SRF KW - vacuum KW - resonance DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-WEPRI064 UR - http://jacow.org/ipac2014/papers/wepri064.pdf ER -