2. Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project 1 st Workshop FTEC 2015 Alejandro Fernandez Navarro 27.10.2015 27/10/2015 2 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez

3. Outline Why quench protection systems in superconducting magnets? Quench heaters and CLIQ Modelling, simulating, testing Main dipole test campaign Modelling the magnets of the insertion region of HL-LHC Simulation results Conclusions and next steps in the short term Annex 3 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez

4. Why quench protection systems in superconducting magnets? 4 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez Magnet destroyed by a quench

5. Quench heaters and CLIQ (Coupling- Loss Induced Quench) 5 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez Aperture 1 Aperture 2 Cross section of the Main Dipole (MB) of LHC CLIQ

6. Output results - Figures - GIF animations - Data files 6 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez Modelling, simulating, testing Modelling Input - Geometric design - Cable data - Material properties Simulating Input - Excel file: Electrical circuit, geometry, magnetic field map, cable and material properties Testing and model validation ROXIE simulations (magnetic field calculations) Output - Magnetic field map MATLAB post- processing TALES Matlab application for electro- thermal dynamic simulations Analysis of results SM18 (Magnet Test Facility of CERN) PredictionsMeasurements Comparison and model validation

7. Main Dipole test campaign 7 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez

8. Modelling the magnets of the insertion region of HL-LHC 8 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez Recombination Dipole Two-in-one Quadrupole Separation Dipole

9. Simulation results 9 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez

10. Conclusions 10 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez CLIQ protection system tested on a full-scale MB magnet and model validated First simulations of CLIQ on the D1, D2 and Q4 magnets of HL-LHC Next steps in the short term Deeper study of CLIQ on D1, D2 and Q4 in a wider range of conditions

11. 11 Annex 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez

12. CLIQ behavior 12 27/10/2015 Modelling and testing of circuit protection of new superconducting magnets for the HL-LHC project A. Fernandez