1. A.Henriques (JCOV meeting 31/5/2001) ATLAS Calorimeter cooling project Goal: u Definition of a common frame work for the cooling of the ATLAS calorimeter electronics (tiles and LAr). u Test critical components of the proposed Leakless cooling system. u Preparation of technical specification documents to be used in the procurement of the various components for mass production. u Construct the cooling units for calibration (build.185 and test beam). u Make real size hydraulic test with “final” components (in b. 185). u magnetic field and radiation tests on “final” components. u Etc…..

2. A.Henriques (JCOV meeting 31/5/2001) Participants Participants u ST/CV cooling group (M. Bosteels/P.Bonneau,...) u ATLAS/Tiles (CERN + Clermont Ferrand+Barcelona) u ATLAS/LAr (BNL) u ATLAS/slow control (CERN)  ATLAS TC (J. Godlewski + TC services team)

3. A.Henriques (JCOV meeting 31/5/2001) Requirements for ATLAS calorimeters Requirements for ATLAS calorimeters u Power on the detector to be cooled u Tiles: 77 kW. 4 partitions of 19 kW for 4x64 drawers (300 W/drawer) u LAr: 255 kW. 2x16 barrel+2x13 End Cap crates of 3.6 kW 2x16 barrel+2x13 End Cap power supply of 0.8kW u Liquid (tiles and LAr) u Water u Pressure: - 300 mbar < p < 0 at the entrance of drawers/electronics ~ 4 bar in inlet pipe close to the cooling unit (1bar+head difference) - 600 mbar in outlet line close to the cooling unit u Temperature: Inside Tiles drawers: 18-20 o C (22m 3 /h) Inside LAr electronics boxes:14-18 o C (55m 3 /h)

4. A.Henriques (JCOV meeting 31/5/2001) Tile Cooling units already constructed by (ST/CV) For the cesium calib. in build. 185 For the beam calibrations in H8 beam

5. A.Henriques (JCOV meeting 31/5/2001) Schematic ATLAS layout longitudinal view (not at scale) BarrelEnd Cap Each line cool 8-12 drawers Flexible cables will allow 12 m End Cap movement without disconnecting -300 mbar 0 mbar In the floor: Outlet tube - 600 mbar Inlet tube ~ 4 bar

6. A.Henriques (JCOV meeting 31/5/2001) The layout of 1/2 Tile barrel cooling 1/2 barrel: 6 tubes inlet (blue) 6 tubes outlet (red) 12 drawers 12 8 drawers Outlet tube -600 mbar - 300 mbar Inlet tube ~ 4 bar 0 bar 12

7. A.Henriques (JCOV meeting 31/5/2001) The layout of the Tile End-Cap Each End cap: 6 tubes inlet (blue) 6 tubes outlet (red)

8. A.Henriques (JCOV meeting 31/5/2001) The layout of LAr 1/2 Barrel Each 1/2 barrel: 6 tubes inlet (blue) 6 tubes outlet (red) 3 boxes 2 boxes

9. A.Henriques (JCOV meeting 31/5/2001) The layout of LAr End Cap Each End cap: 6 tubes inlet (blue) 6 tubes outlet (red)

10. A.Henriques (JCOV meeting 31/5/2001) Cooling hydraulic project in 185

11. A.Henriques (JCOV meeting 31/5/2001) Study Leakless (under pressure) Cooling System in severe environment : not accesible radiation environment magnetic field Full-scale demonstrator in order to check calculations : Dimensioning of the return pipe and regime of the flow --> pressure drop. Draining of air at start. Draining of fluid at stop. Test components (in 185 and for same cases in magnetic field and radiation) : Materials: Circulator (electrical, pneumatic, hydraulic?), Pressure transmitter, Converter E=>P, Pneumatic pressure regulator, Pneumatic shut-off valve, Balancing valve, Liquid level control, Temperature sensors ( Pt100, Pt1000, NTC?) Controls: ELMB, PLC, PID controller, SCADA PVSSII Safety:Piping and fitting, Corrosion and analysis of the fluid, Alarms & interlock Develop individual drawer heating system (by Clermont Ferrand ) + Monitoring (Clermont +TC) + LV cooling (Barcelona) What needs to be tested

12. A.Henriques (JCOV meeting 31/5/2001) Tilecal Cooling Monitoring System Monitoring of 5 NTC probes (outside drawers) Use standard ATLAS DCS tools (ELMB, PVSS-II) to control the cooling station and temperature effects inside the Tilecal drawers (collaboration with ATLAS slow control team and Clermont). Time scale: Running in building 185 in March 2000 Interface to the HV CS (temp inside drawers) Monitoring of devices integrating the cooling unit: Vacuum pump, circulator, temp regulator, etc.

13. A.Henriques (JCOV meeting 31/5/2001) ELMB Multi-purpose, high-density and low-cost I/O concentrator. Credit-card size Radiation tolerant (correction of SEU). Operability in magnetic field (1.5 Tesla) -> No coils, chokes, transformers, DC/DC converters. In-System-Programmable (2 on-board microcontrollers). Remote diagnostics, loading of software and reset. Low power consumption Standard industrial interface: CAN/CANopen PVSS Commercial SCADA system chosen by the Joint COntrols Project (4 LHC experiments and IT/CO) project at CERN to develop Detector Control Systems. Tilecal Cooling Monitoring System II

14. A.Henriques (JCOV meeting 31/5/2001) Costs/Time schedule (Most of this material reusable in final system) APPROXIMATIVE COST: u -Scafolding 0 kCHF (from ALEPH) u -Magnetic drive pump (1): 5 kCHF u -Pressure transmitter (6): 2 kCHF u -Converter E=>P (6): 4 kCHF u -Pneumatic pressure regulator (3): 2 kCHF u -Pneumatic shut-off valve (6)2.5 kCHF u -Balancing valve + control tools (6+1): 1.2 kCHF u -Liquid level control (3): 1 kCHF u -PLC (1): 10 kCHF u -Rack, cabling, accessories (1): 12.5 kCHF u -PID Controller (3): 4.5 kCHF u -Tank and manifolding (1) 4 kCHF u -Leakless system accessories (1): 2 kCHF u -Piping and fitting (1): 10 kCHF u Total:60.7 kCHF (without man power) u excluding EST man power, Clermont Ferrand individual heating development,LV cooling

15. A.Henriques (JCOV meeting 31/5/2001) Costs/Time schedule Costs/Time schedule Approximate cost not yet financed u Components : 52 kCHF u Technical man power: 22kCHF Time scale May 2001: project submitted to GCOV (approval/financing) June 2001: Purchase September-November 2001: Construction and installation in 185 December 2001-June 2002: Tests in 185 + radiation and magnetic field tests October 2002: PRR cooling review before ATLAS tendering