1. ATLAS Inner Detector thermal study

2. The Inner Detector

3. First section : the inner detector

4. Back out Case -40 °C 250°C

5. MaterialDensity (kg/m3) Specific Heat (J/(kg*K)) Thermal conductivity (W/(m*K)) PMMA (plexiglass external tube)120014660.2 U - profiles (except Pixel_B staves)2700900200 IST1690.00712.3108.6 Omega637.9857.270.76 Carbon foam550700135 Titanium Pipe44305607.2 Silicon layer?2320700148 Aluminium foil2700900222 Aerogel11010460.0147 Heaters 0.09 g/cm2 (approx 1250 kg/m3)8440.22 Aluminium pipe2713896200

8. Second section: addition of the other layers

9. Second section:adding of the other layers First section B-layer

10. Thank you for your attention !

11. Geometry Cooling Pipes Staves Beam Pipe Nitrogen

12. Normal case -40 °C 100 W

13. Accidental Case No more cooling ?