JACoW logo

Joint Accelerator Conferences Website

The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.


RIS citation export for WEPML013: Anti-Q-slope enhancement in high-frequency niobium cavities

TY - CONF
AU - Martinello, M.
AU - Aderhold, S.
AU - Chandrasekaran, S.K.
AU - Checchin, M.
AU - Grassellino, A.
AU - Melnychuk, O.S.
AU - Posen, S.
AU - Romanenko, A.S.
AU - Sergatskov, D.A.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - Anti-Q-slope enhancement in high-frequency niobium cavities
J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018
C1 - Vancouver, BC, Canada
T2 - International Particle Accelerator Conference
T3 - 9
LA - english
AB - N-doped 1.3 GHz niobium cavities showed for the first time the so-called anti-Q-slope, i.e. the increasing of the Q-factor as a function of the accelerating field. It was verified that the anti-Q-slope is consequence of the decreasing of the temperature-dependent component of the surface resistance as a function of the field. This trend is opposite compared to the increasing of the surface resistance previously observed in 1.3 GHz standard (EP, BCP, 120 C baked) niobium cavities. The effect of the different state-of-the-art surface treatments on the field dependence of the surface resistance is studied for 650 MHz, 1.3 GHz, 2.6 GHz and 3.9 Ghz cavities. This proceeding shows that the field dependence of the temperature-dependent component of the surface resistance has a strong frequency dependence and that the anti-Q-slope may appear even in clean niobium cavities if the resonant frequency is high enough, suggesting new routes toward the understanding of the anti-Q-slope effect.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 2707
EP - 2709
KW - cavity
KW - ECR
KW - niobium
KW - SRF
KW - experiment
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-WEPML013
UR - http://jacow.org/ipac2018/papers/wepml013.pdf
ER -