Presentazione standard di PowerPoint - Indico

New perspectives on thin film
technology for SRF
Enzo Palmieri
Legnaro National Laboratories
ISTITUTO NAZIONALE DI FISICA NUCLEARE
&
Padua University
FFC Kick-off Meeting, CERN, Geneva, Dec 8-10, 2014
Toward low cost substrates
Seamless Cavity Cold Forming
SRF requires
a large Statistics
6 GHz
New perspectives on thin films
when working on the
Niobium-Copper Interface
Nb Sputtering into Cu Cavities
RF losses
depend also on the status of the
cavity external surface
3.5x109
3x109
2.5x109
2x109
quench
Q0
Q-switch
Q-slope
quench
1.5x109
Q-switch
Q-slope
field emission
T=1.8K
Before Anodization
After Anodization
After De-Anodization
109
0
2
4
6
8
10
Eacc [MV/m]
12
14
16
18
No EXTERNAL EP
WITH EXTERNAL EP
Any SRF improvement
must pass for a deeper comprehension
of the heat flux transport mechanism to
Liq-He