High Granularity Calorimeters LLR – Feb 2-3 Denis Grondin, Julien Giraud Si/W ECAL Endcap structures and cooling 1.Design of the EM end-caps.

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Presentation transcript:

High Granularity Calorimeters LLR – Feb 2-3 Denis Grondin, Julien Giraud Si/W ECAL Endcap structures and cooling 1.Design of the EM end-caps 2. Cooling system (end-caps + barrel) 3. Fastening on HCAL (ends-caps + barrel)

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 2 / 15 Fastening system on HCAL: thick.3cm 185 mm Detector slab (Si) Moulding of one layer / 3 alveoli L = m wall thick. = 0.5mm R~2050 End-Caps: modular alveolar structure - composite W / Carbone HR - 25,5 t 2 x 12 independent modules - 2 x 540 alveoli Ongoing developments Moulding of 3 layers of 3 alveoli - 2,5m End-Cap - Design of specific tools / long wrapping - Optimization of deflection values / skin thickness - Design of an assembly mould for End-cap demonstrator I - Towards full detector – End Caps End-Cap thick composite plate 13mm+ inserts for double row rails Up to 2014…

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 3 / 15 I.2- ECAL Geometry: Optimization impact Possible new geometry (H.Videau): Barrel: 5 modules of 3 alveoli – LBarrel = 3829mm (Z endcap = 3929mm). Endcaps: Quadrants of 2 modules of 2 and 3 alveoli – with R (ECAL Ring) = 40cm + Integer number of Wafers ⇒ R Endcap ≈ 1726mm Impact / Evolution of diameter -Infrastructure Module‘s weight / deformation Module‘s length / composite fab. -Cooling -Electronics in development => uncertainty on final power (4.5 KW to 30 KW) -We must move forward with updated models and tests / re-adaptation of the full leak less loop General distribution for now: - Water sub atmospheric pressure - Water temperature input: 18°c - Water temperature output: 23°c - Maximal power per column: 150 W - Pipes diameter : 13 mm ECAL End-cap D=4188 Weight(kg) Module Module Module D=3424 or 3453 (~ 17 t) 800

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 4 / 15 I.3- Composite structure: shearing tests Charge & discharge cycles: hysteresis in specimens’ behaviour which evolves towards a progressive decrease in the force / displacement with the gradual breakdown of the resin before destruction of the composite Impact on ECAL dead zone CC202-ET445 sample n°4 (after CRP cycles) Progressive load Carbone w g Problem of bending stress of alveoli skins: influence / evolution of thickness of outer plies Sample E4, decrease of effort at constant displacement Shearing tests stress in the structure Dummy composite structures for plies’ thickness validation

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 5 / 15 Progressive loss of stiffness for the dummy structure after each cracking level – constant displacement I.4- Composite structure: shearing tests Ongoing developments 2015 Coming next: Reduction of diameter -> modification of all modules... Tsaï wu criteria Adapt FEA parameters to simulate the whole structure Safety coefficient Static: Sufficient / to the stress induced by weight of modules not sufficient / seism (s =3.2 for Japan?) / risks during integration and transport -> increase nb of ext. plies... Impact on ECAL dead zone M2M1 s = Cc / Cs = 2,8 S = 2,2 S = 1,5 MODULE -Correlation of tests with FEA simulations ● Optimization of composite wrapping / long structure ● Shearing tests on demonstrator -Ensure repeatability of process & characteristics

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 6 / 15 I.5- Geometry: electronic interactions 5x Type 1 1x Type 3 12x Type 4 Wafers = 180 ( ) 96x4 wafers entiers x Type 2 3 types de wafers différents Pour ¼ End Cap: 5x30 types 1 1x30 types 2 1x30 types 3 12x30 types 4 Model with Rext ≈ 2126 Wafer: 130,6 x 130,6 mm with gap of 0,1 Model with Rext ≈ 2050 Wafer: 90 x 90 mm with gap of 0,1 124 wafers entiers 0,1 mm ? 18 x wafers partiels ? Size of End-Cap Slab’s front End ? -> > 385,4 With central hole =770,8² 2015

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 7 / 15 Study from the power source to the global cooling II.2-1Thermal tests of the heat exchanger II.2-2 Full scale leakless loops cooling station 13m High Line 9 m Low Line 10 m Medium Line 2,5 m 5,1 m 4,5 m Cooling Station LPSC cooling test area with a drop of 13 m II – Cooling: leakless water system -Thermal simulations / power variations (limit of pulsing) - Water heat exchanger design near detector Ongoing developments Full scale leakless loop Integration - Cooling station integration+ network -Update of water heat exchanger / BGA -Thermal tests & simulations / power variations (limit of pulsing) Cooling station Validation of leakless system (<1atm) EUDET adaptation of Water heat exchanger Caloduc Prototype Water Heat Exchanger / EUDET

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 8 / 15 II.1 - Cooling: Full scale leakless loops 3D Barrel distribution Distribution test plate Leak less loops construction : Distribution test plate Goal : Pressure measurement / residual bubble……. cooling station 13m High Line 9 m Low Line 10 m Medium Line 2,5 m 5,1 m 4,5 m Cooling Station ECAL End-Cap Intrados: integration with cooling leak less lines Link Tube Ti /fitting electron beam welding Ti Titanium Fitting LAPP / ATLAS IBL Insulator: Transition Ceramic/Titanium Connection integration

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 9 / 15 II.2 - Cooling: on going work Cooling station assembling : - Pipe wiring => ok - Electrical wiring => to be done Full scale leak less loops : cooling station 13m High Line 9 m Low Line 10 m Medium Line 2,5 m 5,1 m 4,5 m Cooling Station Cooling station assembling Pipe /valve / flowmeter

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 10 / 15 Test of a two-phase HEATPIPE II.3 - Cooling: Thermal tests Study & prototype of a flat two-phase thermal diffuser (spreader) ALICE ITS IB stave Microchannels & ATLAS ITK R&D Water Heat exchanger preferred EUDET adaptation of Water heat exchanger to BGA geometry Test bench XX ?

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 11 / 15 Leakless system : - Low water speed - Risk of spray limited - Temperature and power range adapted Space for pipes outwardly of the detector is limited but must be consolidated / other detectors Results Barrel : (1.5m) Max T < 25,5 °C  T = 2,2°C End Cap : (2.5m) 2,1m if R Endcap ≈1726mm Max T = 29 °C  T = 6°C Power : 30*0,356 = 10,68 W Power on PCB = 0,205 W (barrel) / 0,356 W (End-cap) Boundary condition T = 23 °C Thermal flux inside a column of 1 module Conclusion: recalculation T.B.D. in 2015 if R Endcap ≈1726 confirmed Cooling front –end to remove the power of ECAL Low temperature gradient -> cooling system suitable for HCAL  Even with lower radius, volume of cooling pipes will stay equal Reality => low power (3Kw) spread over large surfaces associated with a small space between the detectors (3 cm) => influence of air via important conduction => flux between detectors => Real T° of detector needs global modelling; II.4 – ECAL Cooling Integration – Impact / HCAL

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 12 / 15 HCAL Ring HCAL End-Cap ECAL End-Cap Alveolar W-Carbon HR modules with Rails for Fastening system on HCAL 4188 mm -> 3453 mm ECAL Fully equipped End-cap weight : ~ 25.5 t -> ~17 t III - Fastening on HCAL Preliminary reminders ECAL End-Cap fastened on HCAL End-Cap inner face with rails

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 13 / 15 7 mm Example of ALICE integration tooling Too large / 3 cm for CALICE < 3 cm Guiding and fastening system of modules (ends-caps + barrel) III.2 - Fastening system on HCAL 1 / Specific shaped rails HCAL END-CAP ECAL END-CAP 2 / Self-aligning rollers Double row sized rail on End cap thick plate 87 mm

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 14 / 15 specific handling and positioning tool for integration Construction on going Guiding and fastening system of modules (ends-caps + barrel) III.3 - Fastening system on HCAL HCAL END-CAP Ongoing developments 2015 Validation of technological solutions (bending of modules) Optimization / simulation of best localisation on modules Integration of heavy handling tool for modules’ tests / rails Double row sized rail on End cap thick plate

D. Grondin - LLR – Feb 2-3 LPSC – Si/W ECAL - Endcap structures and cooling 15 / 15 ECAL End-cap DimensionsRailsServices Nb of modules Volume / quarterVolume / modulesWeight Orientation Weight L (mm) / Y l (mm) / X H (mm) / Z L (mm) / Y l (mm) / X H (mm) / Z (kg) D=4188 (1) Quarter Horizontal / left 5713 Module (-563.4) Horizontal / left 84.5 Module (-563.4) Horizontal / left Module Horizontal / left 274 D=3453 (2) 8 ~ 17 t Horizontal / left 1.2 Quarter Horizontal / left 38/ Module (-795) Horizontal / left 16/ Module (-216.3) Horizontal / left 22/ ECAL End-Caps: weight and volume M module = L (mm) x l ext alveolus (mm) x Nb colonne x x10 e-3 + M rails + M services M rails ~ kg/mm Total Weight 1 EC kg M services = cooling exchanger CU + piping Stainless Steel without cabling ! M external services = 160 kg around EC / trough detectors (Stainless Steel) Fully equipped with slabs D=3424 or modules ~ 17 t D= modules ~ 25,2 t T.b.c.