20TH INTERNATIONAL WORKSHOP ON DEPFET DETECTORS AND APPLICATIONS INTEGRATED COOLING CHANNELS IN POSITION-SENSITIVE SILICON DETECTORS L. ANDRICEK, M. BORONAT, J. FUSTER, I. GARCÍA, P. GOMIS, C. MARIÑAS, J. NINKOVIC, M. PERELLÓ, M. A. VILLAREJO, M. VOS
CONTENTS 2 1. MCC case for physics detectors 2. MCC DEPFET-like module 3. Finite element simulation 4. Setup & results: 4.1. Thermal performance 4.2. Mechanical impact 5. Cooling a whole powered module 6. A more realistic approach: considering the bumps 7. Next steps & summary P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
MCC CASE FOR PHYSICS DETECTORS 3 PXD Cooling and support ‣ Belle II cooling structure structure would be too massive to higher acceptance detectors like ILC. P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
MCC DEPFET-LIKE MODULE: PRODUCTION 4 ‣ An integrated cooling channel is designed for a DEPFET module, focusing in the EOS. ‣ The MCC production adds one extra step to the chain: etching the µ- channel in the handle wafer. Handle before Dummy X-ray bonding P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
MCC DEPFET-LIKE MODULE: CONNECTORS 5 In order to feed the cooling circuit a number of connectors to interface with commercial fitting elements have been designed: H 2 O Past (0.81% X/X 0 ) Present (0.2% X/X 0 ) Future (0.05% X/X 0 ) Up to 183 bar 0.05% X/X 0 /5 cm ‣ Self aligning ‣ 3D-printed (15 µm precision) ‣ Glue sealed connector P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
FINITE ELEMENT SIMULATION (I) 6 TEMPERATURE = 25 ºC 6W H 2 O ‣ Low-cost mono-phase cooling liquid: H 2 O. /W] ‣ Low volumetric flows (~1 l/h) 2 6 FE Simulation H O T/Power density [K cm 2 and low pressure (< 1 bar) are 5 FE Simulation PWG6040 enough to dissipate 6 W in the 4 EOS. 3 ∆ 2 ‣ Possibility to use CO2 at high 1 pressure, but not necessary at 0 0.2 0.4 0.6 0.8 1 1.2 1.4 the power densities studied. Volumetric flow [l/h] P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
EXPERIMENTAL SETUP: SCHEME 7 ROOM TEMPERATURE ~25 ºC P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
EXPERIMENTAL SETUP: REALITY 8 INTERFEROMETER @ 50 KHZ INFRARED LASER FLOWMETER PURITY FILTER SHOCK ABSORBER PERISTALTIC PUMP WATER STORAGE AIR COOLING Air H 2 O TERMOMETERS CLAMPED-FREE MCC SI MODULE P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
RESULTS: THERMAL PERFORMANCE (I) 9 Errors: ✦ P: ±1% W ✦ T: ±1 ºC ✦ Flow: ±0.03 l/h ‣ MCC dummy cooled non-stop for a week with no leaks and no clogging. ‣ Good agreement with the FE simulation (within 10% error). P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
RESULTS: THERMAL PERFORMANCE (II) 10 0-22W H 2 O Max. power supported for Δ T of 10 ºC as a function of the volumetric flow: ‣ Power capped at max. pump power ~3 l/h ‣ Low pressure measured: 0.2 - 1.5 bar P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
RESULTS: MECHANICAL IMPACT (I) 11 NO fluid circulation Fluid circulation 50% (1.47 l/h) Air flow (v=3m/s) 9.3846 9.3358 9.52 Signal [mm] Signal [mm] Signal [mm] 9.3845 9.5 9.3356 9.3844 9.48 9.3354 9.3843 9.46 9.3842 9.3352 9.44 9.3841 9.42 9.335 9.384 9.4 9.3839 9.3348 9.38 9.3838 9.3346 9.36 9.3837 9.3836 9.3344 9.34 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 0 2 4 6 8 10 12 14 16 18 20 Time [s] Time [s] Time [s] No fluid circulation Fluid circulation Air flowing and no air flowing (1.47 l/h) (3 m/s) Peak to peak of the Peak to peak of the Peak to peak of the signal ~0.7 μ m signal ~0.1 μ m signal ~130 μ m RMS ~0.3 μ m RMS ~0.4 μ m RMS ~57 μ m MCC has no significant impact on mechanical stability in the clamped-free configuration but air deformations are over 100 μ m for v = 3 m/s. P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
WHOLE POWERED MODULE: HYBRID APPROACH 12 Air 1W 0.5 m/s H 2 O SENSOR 0.5W 6W HOTTEST POINT C] o 60 T [ Sensor: MCC ∆ Sensor: MCC+air 50 40 ‣ Big difference between MCC and 30 MCC+air at the sensor area hottest point. 20 ‣ Nearest regions to air input are 10 efficiently cooled even with low air 0 flow. 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Volumetric flow [l/h] ‣ MCC has less impact in away points as Cooling strategy: micro-channels running under the expected and great cooling locally. front end and gentle air flow on the sensor part. P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
WHOLE POWERED MODULE: MCC ALTERNATIVES 13 Standard MCC layout Δ T = 73 K Standard MCC layout + channel below switchers Front end HOTTEST Δ T = 15 K Standard MCC layout + channel below switchers + channel in the balcony Δ T = 5 K P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
MORE REALISTIC APPROACH: BUMPS 14 6W /W] 9 2 T/Power density [K cm FE Simulation H O H 2 O 2 8 7 FE Simulation H O realistic design 2 6 5 4 ∆ 3 2 1 Front end HOTTEST POINT 0 0.2 0.4 0.6 0.8 1 1.2 1.4 Volumetric flow [l/h] Realistic design 300 μ m Si ASICS + 100 μ m Bump-boundings thermal resistivity of 6 W/m·K Carlos Mariñas PhD Thesis In the realistic design the power dissipation is degraded P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
NEXT STEPS 15 ‣ Test the radiation resistance of the 3D-printed connectors. ‣ Repeat the thermo-mechanical measurements for the new designs of the connectors. ‣ Reproduce the study for the more realistic approach, with bumped resistors instead of printed ones. ‣ Produce and test the thermo-mechanical properties of the whole powered modules of the new MCC alternative layouts. P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
SUMMARY 16 ‣ MCC shows very efficient local cooling, up to 25 W/cm 2 for Δ T ~ 10º C using low pressure mono-phase cooling liquid. ‣ The thermal measurements agree with the FE simulation. ‣ MCC has negligible impact on the module mechanical stability. ‣ Three in-plane connector concepts have been designed and manufactured, going towards less massive connectors. ‣ MCC modules have been successfully assembled (in 3/3), operated non-stop for a week, and supporting pressures up to 183 bars. ‣ These features qualify MCC as a real option for silicon detectors in physics. P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
THANKS FOR YOUR ATTENTION THIS STUDY IS SUPPORTED BY THE AIDA2020 THERMO-MECHANICAL PACKAGE MORE INFORMATION AVAILABLE AT ARXIV:1604.08776 P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
BACKUP P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
VIBRATION’S SPECTRAL POWER DENSITY 19 10 -4 PSD [mm 2 /Hz] NO fluid circulation Ladder eigenfrequency Fluid circulation 15% (0.45 l/h) (~150 Hz) 10 -6 Fluid circulation 50% (1.47 l/h) Air flow (v=3m/s) 10 -8 10 -10 10 -12 10 -14 10 0 10 1 10 2 10 3 10 4 Frecuency [Hz] P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
VIBRATION AMPLITUDE VS. AIR SPEED 20 m] 60 m] 2 2 / ndf / ndf 2 2 χ χ 11.36 / 5 11.36 / 5 / ndf / ndf 1.049 / 5 1.049 / 5 χ χ 8 µ µ [ [ Prob Prob 0.9585 0.9585 Prob Prob 0.04467 0.04467 y y Peak to peak RMS Peak to peak RMS 50 p0 p0 p0 p0 0.0003824 0.0003824 0.05772 0.05772 7 0.005478 0.005478 0.05779 0.05779 − − ± ± ± ± p1 p1 8.413 8.413 2.266 2.266 p1 p1 ± ± 0.8508 0.8508 0.291 0.291 ± ± 6 p2 p2 5.222 5.222 ± ± 1.208 1.208 p2 p2 0.9325 0.9325 0.1558 0.1558 ± ± 40 5 30 4 3 20 2 10 1 0 0 0 0.5 1 1.5 2 2.5 0 0.5 1 1.5 2 2.5 v[m/s] v[m/s] Clamped-Clamped Clamped-Free ‣ Peak-to-peak amplitude is the change between peak (highest amplitude value) and trough (lowest amplitude value) ‣ RMS ≃ (PeaktoPeak/2) * 0.707 (approximation) ‣ For v= 2.5 m/s the amplitude of vibration is: • ~19 μ m for clamped-free configuration • ~2.8 μ m for clamped-clamped configuration P. Gomis (Pablo.Gomis@ific.uv.es) @ 20th International Workshop on DEPFET Detectors and Applications - 13/05/2016
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