Reduced volume of the tube cavity 2 nd Harmonic cavity meeting June 30 2016 Gennady Romanov Anode impedance CST vs HFSS eigenmode solver 30VI2015 Gennady Romanov Reduced volume of the tube cavity Anode impedances ID: 631885
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Slide1
Anode impedance simulations. Reduced volume of the tube cavity.
2nd Harmonic cavity meetingJune 30, 2016
Gennady RomanovSlide2
Anode impedance. CST vs HFSS, eigenmode solver30/VI-2015Gennady Romanov | Reduced volume of the tube cavity. Anode impedances2
101.416
The
material
properties (constant and uniform, used in HFSS)
The
Garnet:
ε
=14
,
μ
=
4.8 (75-76 MHz), 1.5 (~ 105.8MHz), tanδE= 0.0001, tanδM = 0.000467 (all frequencies) Ceramic (Al2O3): ε = 9.7, tanδE = 0.0002.
CST eigenmode solver does not recognize discrete ports. So, anode impedance was calculated in this waySlide3
Anode impedance in PA setups30/VI-2015Gennady Romanov | Reduced volume of the tube cavity. Anode impedances3
Three possible terminations:50 Ω lumped loadWaveguide port (42 Ω !)
Open boundary (perfect matching)
F, MHz
V, Volt
I, Ampere
V/I
Z11, Ohm
HFSS f
HFSS Z11
Old Open
51.155
42.67
0.02218
1923.805
1923.9
Old WG
51.154
42.67
0.02218
1923.805
2995.4
Old 50
Ω
51.12
46.560.018942458.2892458.6531950New Open74.2136.480.0264561378.8931379New WG74.21136.490.026451379.5842587New 50Ω74.22448.50.020482368.1642368762400
Old PA setup
New PA setupSlide4
30/VI-2015Gennady Romanov | Reduced volume of the tube cavity. Anode impedances4Reduced volume of the tube cavity
“Real” solenoid from Iouri (steel is not M15 yet)Reduced volume of the tube cavity.Slide5
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