3 Gennady Romanov 2 nd Harmonic cavity Meeting 24 IX2015 Final tweaks 24IX2015 Gennady Romanov On coupler design 2 PortR 1852gt2002 Aperture 3 Lcoax 500 gt450 mm ID: 491123
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Slide1
On coupler design - 3
Gennady Romanov
2
nd
Harmonic cavity Meeting
24
/IX-2015Slide2
Final tweaks24/IX-2015Gennady Romanov | On coupler design2
Port_R
= 185/2->200/2
Aperture 3”
L_coax
= 500-
>450 mmL_ferr = 95->115 mmAl2O3 – 3 mm thicknessAl800 – variable thicknessCone shape of the tube shellCapacitance < ½ of full circle
2ndHarm_EM_TanTube_Short, TS
5Slide3
Thermal analyses24/IX-2015Gennady Romanov | On coupler design3
17
mm
22 mm
22 mm
22 mm
23.5 mm
3 kW, max 56.2°C
4
kW, max 66.6°C
Loss density distribution
The thermal losses averaged over cycle vary from 3 to 4 kW, depending on soft used, model modifications, mesh density, material properties
etcSlide4
Transmission line model -> CST24/IX-2015Gennady Romanov | On coupler design4
a
b
a
: 127 mm -> 107
b: 125- > 100
Length of ferrite -> 105 mm
Coupling capacitor goes from 10 pF -> 7.5 pF in trans line model
I assumed:
L_tube
is constant
Coupling capacitor
is
½
of full
circle
L_tube