1. Pierre Barroca ITK LAPP – 2015-09-07 1 1.Goals 2.Simulation 3.Prototype measurements 4.Setup 5.Results 6.Conclusions 1.Goals 2.Simulation 3.Prototype measurements 4.Setup 5.Results 6.Conclusions ALPINE LAYOUT STATUS ON THERMAL MANAGEMENT ALPINE LAYOUT STATUS ON THERMAL MANAGEMENT

2. Pierre Barroca ITK LAPP – 2015-09-07 2 Built some reliable thermal simulation models Use these models to : Evaluate the thermal performances of alpine staves (structural parts) ref to specs Use it for designs comparisons (structural parts) Evaluate the thermal performances of the complete Alpine detector Built some reliable thermal simulation models Use these models to : Evaluate the thermal performances of alpine staves (structural parts) ref to specs Use it for designs comparisons (structural parts) Evaluate the thermal performances of the complete Alpine detector Perform measurements to : Define the real material and interfaces performances (to be implemented in the FEA model) Compare measurements on stave prototypes and simulations to get a good view of the real thermal behaviour. Perform measurements to : Define the real material and interfaces performances (to be implemented in the FEA model) Compare measurements on stave prototypes and simulations to get a good view of the real thermal behaviour. 1 – Goals

3. Pierre Barroca ITK LAPP – 2015-09-07 FEA results 4 cases comparison Innermost layers pass the spec criteria with “standard materials Outermost layers pass the spec criteria with graphite covering Innermost layers pass the spec criteria with “standard materials Outermost layers pass the spec criteria with graphite covering 2 – Simulation

4. Pierre Barroca ITK LAPP – 2015-09-07 4 3 – Prototype measurements Tests on IBL like prototype (? and spring 2015) Results seem to depend on external temperature

5. Pierre Barroca ITK LAPP – 2015-09-07 5 3 – Prototype measurements Tests on IBL like prototype in the climate chamber (spring 2015) 3 sets of measurements: Heat Loads: 3.4 W, 5.2 W, 9.9 W Climate Chamber: -10  C, -15°C, -25°C

6. Pierre Barroca ITK LAPP – 2015-09-07 6 Theoretical heat transfert modeling Vacuum Radiation Sensors location Cooling system Heating homogeneity How it influences? 3 – Prototype measurements For comparisons FEA models and prototypes must have the same boundary conditions

7. Pierre Barroca ITK LAPP – 2015-09-07 7 Theoretical heat transfert modeling 3 – Prototype measurements Using only thermal foams seems not enough to prevent heat exchanges New tests have to be performed in a vacuum vessel in order to prevent convection

8. Pierre Barroca ITK LAPP – 2015-09-07 8 3 – Prototype measurements TPG LPSC ALPINE mountain - TPG ALPINE mountain - Thermasol Thermasol The 2 first alpine mountain prototypes

9. Pierre Barroca ITK LAPP – 2015-09-07 9 Preliminary TESTS 3 – Prototype measurements

10. Pierre Barroca ITK LAPP – 2015-09-07 10 Alpine mountain mockup 4 – Setup T1 – Top T2 – Bottom T5 - Inlet T6 – Outlet T1 – Top T2 – Bottom T5 - Inlet T6 – Outlet

11. Pierre Barroca ITK LAPP – 2015-09-07 11 Experimental Setup 4 – Setup Pumping system

12. Pierre Barroca ITK LAPP – 2015-09-07 12 Multilayer insulation 5 – Results

13. Pierre Barroca ITK LAPP – 2015-09-07 13 Insulation and T chamber – TPG mockup 5 – Results Insulation lowers Tchamber influence 4.17 ºC/W Still ~2.5ºC for 0W

14. Pierre Barroca ITK LAPP – 2015-09-07 14 Insulation and T chamber – TPG mockup 5 – Results Heating power - 4.9W Heating not homegeneous?

15. Pierre Barroca ITK LAPP – 2015-09-07 15 Tchamber&Heating – Thermasol 5 – Results Different from TPG 4.5 ºC/W 0.25ºC  5.3mW T2 depends linearly Tchamber T2 didn’t surpass T1 T1 – T2 lowers with heating 25ºC to -25ºC  Δ1ºC

16. Pierre Barroca ITK LAPP – 2015-09-07 16 Vacuum 5 – Results Weird results ~100mbar Vacuum applied is important

17. Pierre Barroca ITK LAPP – 2015-09-07 17 Heating homogeneity – heater nº10 5 – Results FRONT sideBACK – heating side Temperature difference each side Heating is homogeneous Problem at TPG must be due to heater assembling!

18. Pierre Barroca ITK LAPP – 2015-09-07 6 – Conclusions Insulation is important to minimise outer temperature influence Vacuum, T chamber influence on results Heater assembling protocol must be defined T1 – T5 curves differ from TPG to Thermasol T5 must be closer to Twall from simulation (new mockup) THERMASOL - Difference across Top and Bottom at the mountain always lower than 1ºC T1-T5  ~4.5ºC/W heater TFM  34.2 ºC.W -1.cm -2