Activities in Valencia C. Lacasta ( Carlos.Lacasta@ific.uv.es ) C. Lacasta ( Carlos.Lacasta@ific.uv.es ) C. Mariñas ( cmarinas@uni�bonn.de ) A. Oyanguren ( oyangur@ific.uv.es ) 1 cmarinas@uni�bonn.de
Activities in Valencia C. Lacasta ( Carlos.Lacasta@ific.uv.es ) C. Lacasta ( Carlos.Lacasta@ific.uv.es ) C. Mariñas ( cmarinas@uni�bonn.de ) ← Very last talk in this WG! A. Oyanguren ( oyangur@ific.uv.es ) 1 cmarinas@uni�bonn.de
Outline � STATUS AND FUTURE PLANS: � Thermal mockup � Thermal enclosure (short update) 2 cmarinas@uni�bonn.de
THERMAL MOCKUP 3 cmarinas@uni�bonn.de
Mock�up: Air cooling • Working on a PXD mock�up inside a IR transparent cylinder (thermal images) • Al�beam pipe with cooling (15ºC) • Support structures similar to the final ones but with mono�phase cooling � CO 2 will follow in a second stage � CO 2 will follow in a second stage • Ladders: Samples with integrated resistors and transparent dummy ladders 4 cmarinas@uni�bonn.de
Cooling blocks Stainless steel 3D laser sintering Pin+plastic nut Polished surface Two holes to accomodate old and new samples 5 cmarinas@uni�bonn.de
Support rings • The two independent halves attached to the support ring • Support ring held to the beam pipe 6 cmarinas@uni�bonn.de
Cooling blocks The support structures will be populated with dummies (made in polycarbonate) and two silicon samples with resistors integrated 7 cmarinas@uni�bonn.de
Support rings and working volume Two PVC “endcaps” will define the working volume: PXD standalone or PXD+SVD The IR transparent screen will be extended to cover the full volume Holes for the services (air and coolant) Colling block attached to the ring 8 cmarinas@uni�bonn.de
Assembling the full system General view The support rings can slide along the beam pipe to accomodate longer samples 9 cmarinas@uni�bonn.de
Resistor samples and polycarbonate dummies Modules fixed using plastic nuts (missing here) 10 cmarinas@uni�bonn.de
• Connectors for Monophase cooling (when CO 2 , pipes directly welded) Air 11 cmarinas@uni�bonn.de
Preparing the samples They work! The samples are already ‘wired’ Cables glued using silver conductive epoxy 12 cmarinas@uni�bonn.de
First foreseen study Air regime with only polycarbonate dummies 13 cmarinas@uni�bonn.de
Environment To work with such low temperatures: • Thermally isolated box • Dry atmosphere (dry nitrogen inside) 14 cmarinas@uni�bonn.de
New cooling block prototypes • Cooling block materials: � Thermal conductivity as high as possible � Anti�magnetic � Cope with high pressures (tens of bar) � Availiable to be produced using 3d fast prototyping Material Thermal CTE (um/mºC) Tensile conductivity strength (W/m·K) (W/m·K) (N/mm 2 ) (N/mm ) Stainless steel 17�4 16 11.7 ~1000 Stainless steel 15�5 22.6 13 Steel CL20 15 17 650 AISI 316 steel 16.2 15.9 ~600 → DM20 30 18 400 → AlSi10Mg 140 21 310 Ti6Al4V 7.2 9.2 1200 CTE Si =3.2um/m ºC • DM20 is already done 15 cmarinas@uni�bonn.de
New cooling block DM20 (DirectMetal 20) is a bronze� based, multi�component metal powder. Excellent detail resolution and surface quality. quality. The surfaces can be easily polished with very little effort Unfortunately… it presents some residual magnetic behaviour (probably because of Ni) We can do pressure tests, anyway � AlSi10Mg will be delivered to Valencia this week 16 cmarinas@uni�bonn.de
THERMAL ENCLOSURE 17 cmarinas@uni�bonn.de
Mini�Airex 100µm Araldite 2011 epoxy Kapton: 1.7x10 �3 X 0 Heater (Cu�polyimide) Airex: 2.0x10 �3 X 0 Al: 4.5x10 �6 X 0 0 Araldite: 5.0x10 �4 X 0 TOTAL: 2.7x10 43 X 0 Aluminised Kapton foil 8mm Foam Core (Airex) Aluminised Kapton foil 2 Al�Kapton (0.8 µmAl; 49.6µm in total): Reduces the radiative heat transfer 18 cmarinas@uni�bonn.de
Dummy TE Al�Kapton 19 cmarinas@uni�bonn.de
Dummy TE ∆T Cold air 20 cmarinas@uni�bonn.de
Dummy TE T out =20ºC Fits into the CDC needs If T in =0ºC 30 25 T out (ºC)=0.18·T in (ºC)+20.3 20 out(ºC) Tout(º 15 15 Because the air at �10ºC will enter the volume through dedicated channels in the PXD endflanges and the SVD will live with our 10 ‘leaks’, it will be getting warmer as it expands… 5 → No too low temperatures are expected in the inner wall of the thermal enclosure 0 0 5 10 15 20 25 30 Tin (ºC) 21 cmarinas@uni�bonn.de
Implementation: Using the barrel support SVD 2 had a carbon fiber shell to combine forward and backward support Using the carbon fiber layer covering the SVD, an Airex+aluminised kapton sandwich can be implemented Carbon Fiber Layer Airex Core Airex Core Work in progress (Valencia and Vienna) 22 cmarinas@uni-bonn.de
Conclusions � Thermal mockup The mockup to study the feasibility of the cooling solution is ready. First studies will comprise air flow regime. Thermal images with the resistor samples will follow soon. � Thermal enclosure: A simple solution works and cope with the requirements A detailed implementation is foreseen when fixed the CF shell 23 cmarinas@uni�bonn.de
Thank you!! 24 cmarinas@uni�bonn.de
Recommend
More recommend
