Superconducting RF cavities for High Current Energy Recovery Linacs

Cavity Design
1
B
alpha
a
Normalized units
0.8
0.6
E pk /E acc
0.4 H pk /E acc [mT/(MV/m)]
Iris Radius - R iris
R/Q [Ω]
0.2
cell coupling
dF/dR equator [MHz/mm]
0
6 6.5 7 7.5 8 8.5 9 9.5 10
Iris Radius [cm]
1
D
A
b
d
Riris
L
Iris Radius, R iris
8.5 [cm]
Wall Angle, α
25 [deg]
Equatorial Ellipse, R = B 1.0
A
Iris Ellipse, r = b 1.1
a
Cav. wall to iris plane, d 2.5 [cm]
Half Cell Length, L = λβ 10.65 [cm]
4
H = D − (R iris + b + B) 4.195 [cm]
Cavity Beta, β = v 1.0
c
Normalized units
Normalized units
Normalized units
0.9
0.8
E pk /E acc
H pk /E acc [mT/(MV/m)]
0.7
R/Q [Ω]
cell coupling
Wall Angle (α)
dF/dR equator [MHz/mm]
0.6
10 12 14 16 18 20 22 24 26
1
0.95
0.9
0.85
0.8
1
0.95
0.9
0.85
α [deg]
Iris Ellipse Ratio (r=b/a)
1 1.5 2 2.5
Iris ellipse ratio
E pk /E acc
H pk /E acc [mT/(MV/m)]
R/Q [Ω]
cell coupling
dF/dR equator [MHz/mm]
dF/dR equator [MHz/mm]
0.8
0.6 0.8 1 1.2 1.4 1.6 1.8 2
Equator ellipse ratio
Equator Ellipse Ratio (R=B/A)