Lorenzo Teofili David Carbajo Perez ENSTITCD Francesco Giordano Giacomo Mazzacano BEABPHSC Motivation X 2 Motivation The Method Interface ID: 911957
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Slide1
CTS-ANSYS COUPLING FOR INDUCED IMPEDANCE RF HEATING EFFECTS SIMULATION
Lorenzo Teofili, David Carbajo Perez (EN-STI-TCD)
Francesco Giordano, Giacomo Mazzacano
(BE-ABP-HSC)
Slide2Motivation
X 2
Slide3Motivation
Slide4The Method
Interface
Slide5WorkFlow
1
True Beam
P 3D map
Correct
Space Distribution
Wrong
Absolute Values!
Interface
Device
Slide6Interface
3D MAP RESCALING
…
WorkFlow
2
Slide7x y z P/m^2 Area
WorkFlow
3
Slide8Beam
TDIS cut view, Courtesy of
D. Carbajo
Perez et al.
Injecting Beam
RF shielding
Clamps
RF shielding
x
z
y
Upper Jaw
Lower Jaw
x
z
y
A Real EXAMPLE, The TDIS
Circulating Beam
Slide9The TDIS: Eigenmode Simulations
-
Eigenmode
Simulations
-
Wakefield Simulations
No Finger Case
Slide10The TDIS:
Thermal CST
INTERFACE
Slide11The TDIS: Thermal CST
Slide12The TDIS: From CST to ANSYS
INTERFACE
Slide13The TDIS: From CST to ANSYS
Interface
Slide14The TDIS: ANSYS
Slide15The TDIS: ANSYS RF-Power Import
Import
Slide16The TDIS: ANSYS Temperature Results
Slide17The TDIS: ANSYS Temperature Results
Slide18The TDIS: ANSYS Temperature Results
Slide19The TDIS: ANSYS Temperature Results
Slide20The TDIS: ANSYS Temperature Results
Slide21The TDIS: ANSYS Temperature Results
Slide22EigenMode
Simulations
Compute the Thermal Losses for each frequency and obtain the Power Map
Thermomechanical Simulations
14/12/2017
Prepare The Import
Slide23User Friendly
Slide24Thank You For Your Attention
Acknowledgements: I. Lamas Garcia, J. Maestre Heredia (EN-STI-TCD), N. Biancacci, B. Salvant, M. Migliorati (BE-ABP-HSC)
Slide25
Slide26Backup Slides
Slide27In case the material we are dealing with is an insulating one, power losses will develop in the entire volume of the material ruled by the equation
w
here
is the punctual electric field in the material.
How Does CST Compute Power Lost?
The Power Dissipated on the wall of a structure
at a fixed frequency
that interacts with an electromagnetic field is given by the well know Formula [1]:
where
is the skin
depth,
the electric conductivity of the material, and
are the surface currents.
This results is valid only for structures made of good conductors.
Slide28Benchmark- Dissipated Power In a Cavity
In order to benchmark the software let us consider a simple case, the one of a pill box cavity and compare the CST results with the analytical ones [1], integrating
the previous formulation over the surface gives
where
is the cavity radius, the cavity length
is the Bessel function of the first kind and
is the peak electric field.
CST
Analytical
Error
3.56e4
2.6721e6 W
2.677e+6 W
0.2 %
3.56e7
8.4665e4 W
8.449e+4 W
0.2 %
L = 0.6; % [m]
length
of the pillbox
Rc
= 0.2; % [m]
radius
of the pillbox
f
= 0.5714; % [GHz] frequency of the computed mode
E0 = 3.335e+6; % [V/m] Peak electric field
Slide29Dissipated Power Map TM010
Benchmark - Dissipated Power In a Cavity
CST
Analytical
Error
3.56e4
2.6721e6 W
2.677e+6 W
0.2 %
3.56e7
8.4665e4 W
8.449e+4 W
0.2 %
L = 0.6; % [m]
length
of the pillbox
Rc
= 0.2; % [m]
radius
of the pillbox
f
= 0.5714; % [GHz] frequency of the computed mode
E0 = 3.335e+6; % [V/m] Peak electric field