Superconducting RF cavities for High Current Energy Recovery Linacs
Superconducting RF cavities for High Current Energy Recovery Linacs
Superconducting RF cavities for High Current Energy Recovery Linacs
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
Fundamental Mode - Main Issues<br />
• E peak<br />
E acc<br />
• P cav ∝<br />
(↓),<br />
H peak<br />
E acc<br />
(↓)<br />
Rs<br />
(R/Q)G (↓)<br />
– R s ∝ ω 2 (R s = R BCS + R res )<br />
– R G ∝ const. (dim. ∝ ω)<br />
Q<br />
R BCS [nΩ]<br />
10<br />
8<br />
6<br />
4<br />
2<br />
BNL (0.7 GHz)<br />
TESLA (1.3 GHz)<br />
CEBAF (1.5 GHz)<br />
R res = 3 nΩ<br />
R res = 1 nΩ<br />
• Field sensitivity: a ∝ N 2<br />
k cc<br />
(↓)<br />
0<br />
1.2 1.4 1.6 1.8 2 2.2<br />
Temperature [ 0 K]<br />
Par BNL(HC) CEBAF(HG) TESLA(HG)<br />
Freq. [MHz] 703.75 1497 1300<br />
R<br />
Q ∗ G [Ω2 ] 9 × 10 4 2.1 × 10 5 2.8 × 10 5<br />
E p /E a 1.97 1.96 1.98<br />
H p /E a [mT/MV/m] 5.78 4.15 4.15<br />
k cc 3% 1.89% 1.87%<br />
N cells 5 7 9<br />
N 2<br />
βk cc<br />
8.3 × 10 2 2.6 × 10 3 4.1 × 10 3
Change language