1. Maxwell and Ansys simulations for the CAPP detector
Gardikiotis
University of Patras

2. Then you need the ramp-down rate (dB/dt).
Dear Antonio,
I think that simulating the real field starting from the coils of the LHC magnet is daunting and not necessary.
I would start with a simple scheme, namely the field distribution and uniformity inside the bores and its value.
Then you need the ramp-down rate (dB/dt).
We could provide you with Autocad drawings of the real cavities, but if I were you I would start a simple rectangular prism placed in the full field region and centered on the magnetic field axis: nothing else. Start with rectangular cavities of 2 mm thickness.
From this I would proceed to calculate Edy currents, stresses and displacements of the cavities inside the bore.
After you have this under control, than you can start changing material, approach the real geometry, etc., only up to what is necessary and sufficient.
But do not make your life more complicated than necessary.
All this needs to be done in coordination with the magnet test group though, they will in the end set the tone of what is necessary and sufficient.

3. Maxwell 3D Magnetostatic Eddy currents Transient
+ electric simulations..
CATIA Model (2)
500 mm long rectangular cavity.
Coldbore +cavity
Coils

4. Maxwell model
Materials assignment:
Copper
Stainless Steel
Vacuum

5. Superconducting coils NbTi and beam screen

6. Material properties Steel Copper <1.005 1.8382e+7 Siemens/m

7. Quench dynamics -> transient simulation ++
I(time)= *time *time^ *time^ *time^ *time^5

8. Field distribution

9. 2nd Model

10. Eddy currents during a quench
Since 𝜕𝐵 𝜕𝑡 is negative during a quench, the structure expands horizontally and contracts vertically

11. Force density
cavity

12. Force Magnitude in the coldbore
Morrone

13. Beam screen deformation
Morrone for HL-LHC

14. From Maxwell to Ansys static structural

15. Deformation of the cavity
Model (4 coils)

16. Deformation of the cavity
Model (8 coils)

17. Deformation of the cavity +Temperature
Model (8 coils)

18. Stress intensity no temperature
Model (8 coils)

19. Model has been approved by http://www.feacomp.com/
brary/article/Magnetic-Appeal-Multiphysics-AA-V8-I2.pdf

20. Thermal Loads
Ohmic losses in the cavity 16
W/mK
300

21. Heat Flux generated