Thermal Analysis of Outer Tracker Modules and Rod Susanne Kyre UCSB 2/8/20101Susanne Kyre UCSB
TK Module design parameters from Nov 2009 TUPO presentation by Hans Postema 2.5 cm strip length Sensor glued on 2 TPG strips TPG strips on the backplane side TPG strips connected to cooling block on cooling pipe Hybrid with apv’s glued on sensor, strip side, above the TPG strip DC-DC converter glued on the TPG strip of the sensor. One DC-DC converter powers 2 hybrids 2/8/2010Susanne Kyre UCSB2
Dimensions and Materials PartMaterialArea [mm 2] Thickness [mm] thermal conductivity [W/mK]Power [mW] SensorSilicon84.5 x ChipSilicon10 x DC-DC coilSilicon12 x HybridG10 and copper 85 x x 30 (ears) in plane; 0.37 out of plane Support stripTPG116 x in plane; 20 out of plane Epoxy thermally conductive epoxyall glue joints Cooling BlockBeryllium Oxide 13.5 x mm cooling tube dia /8/20103Susanne Kyre UCSB
Module FEA 2/8/2010Susanne Kyre UCSB4
Result of steady state thermal analysis Maximum Temperature: -27.0°C (at center readout chips on hybrid #2) 2/8/2010Susanne Kyre UCSB5
Result of steady state thermal analysis Maximum Sensor temperature: -28.3°C 2/8/2010Susanne Kyre UCSB6
TK Rod design parameters 12 Modules per rod (6 facing up, 6 facing down) One cooling loop per rod Cooling block temperature at inlet: -30°C Cooling block temperature at outlet: -25°C Sensor, DC-DC and Readout chip power as in Module analysis 2/8/2010Susanne Kyre UCSB7
Cooling block temperatures From Module analysis: Heat flux through cooling block-pipe interface differs with cooling block location Assume: ΔT between cooling blocks is proportional to difference in heat flux between cooling blocks 2/8/2010Susanne Kyre UCSB8
Rod FEA 2/8/2010Susanne Kyre UCSB9
Result of steady state thermal analysis Maximum Temperature: -24.0°C at hybrid #2 on module closet to inlet/outlet 2/8/2010Susanne Kyre UCSB10 Max. Temp
Result of steady state thermal analysis Maximum Sensor temperature: -25.1°C at sensor closest to inlet/outlet This sensor also has the largest temperature gradient: 3.0°C across the sensor 2/8/2010Susanne Kyre UCSB11