SRF2011 - List of Authors (Romanenko, A.)

Paper	Title	Page
THPO008	Post-Baking Losses in Niobium Cavities Studied by Dissection	710
	A. Romanenko, L.D. Cooley, G. Wu Fermilab, Batavia, USA G. Ciovati JLAB, Newport News, Virginia, USA
	Thermometry investigations on electropolished cavities, which underwent mild baking, and are limited by a localized quench at 150-200 mT, show that in the absence of the high field Q-slope there are still a few localized sources of dissipation. Identification of these areas along with the high field quench location followed by dissection and surface analysis of the resulting coupons allowed to gain insight into possible mechanisms of these effects, and will be reported in this contribution.

THPO052	Investigation of Near-Surface Interstitial Hydrogen in Cavity-Grade Niobium	849
	A. Romanenko Fermilab, Batavia, USA L.V. Goncharova UWO, London, Ontario, Canada
	Details of the distribution of near-surface hydrogen in niobium cavities is important for research into mechanisms affecting quality factor dependence on the magnitude of surface fields. We utilized an elastic recoil detection technique to extract the distribution of hydrogen with depth resolution of order one nanometer in samples, which underwent different treatments similar to the ones with the known effect on cavity performance. Results of this study and possible implications are reported.

Paper

Title

Page

Post-Baking Losses in Niobium Cavities Studied by Dissection

710

A. Romanenko, L.D. Cooley, G. Wu
Fermilab, Batavia, USA
G. Ciovati
JLAB, Newport News, Virginia, USA

Thermometry investigations on electropolished cavities, which underwent mild baking, and are limited by a localized quench at 150-200 mT, show that in the absence of the high field Q-slope there are still a few localized sources of dissipation. Identification of these areas along with the high field quench location followed by dissection and surface analysis of the resulting coupons allowed to gain insight into possible mechanisms of these effects, and will be reported in this contribution.

THPO052

Investigation of Near-Surface Interstitial Hydrogen in Cavity-Grade Niobium

849

A. Romanenko
Fermilab, Batavia, USA
L.V. Goncharova
UWO, London, Ontario, Canada

Details of the distribution of near-surface hydrogen in niobium cavities is important for research into mechanisms affecting quality factor dependence on the magnitude of surface fields. We utilized an elastic recoil detection technique to extract the distribution of hydrogen with depth resolution of order one nanometer in samples, which underwent different treatments similar to the ones with the known effect on cavity performance. Results of this study and possible implications are reported.