1. Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field A. Mati, S. Petrucci, M. Pieracci, G. Selmi, C. Tintori CAEN S.p.A., Via Vetraia 11, Viareggio, Italy 11th Workshop on Electronics for LHC and future Experiments Heidelberg, Germany, 15 September 2005

2. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 2 Summary A compact data acquisition and power supply system housed in a water cooled special crate has been designed for the readout of the TOF (Time Of Flight) detector of the Alice experiment at CERN. The Crate contains a 12 slot VME64X bus that houses 2400 multi-hit 25ps TDC channels (TDC Readout Module: TRM), a local Trigger Module (LTM), a Clock Distribution Module (CPDM) and a Data Readout Manager (DRM board) with two optical links and Ethernet. The same crate hosts the branch controlled power supply modules for the VME boards and the TOF detector front-end modules. The whole system shall be used close to the TOF detector and will work under moderate radiation and intense magnetic field (1.2 Gy/10 years TID, 5 KGauss,). The TDC boards house TDC chips developed by CERN/ECP-MIC Division (HPTDC). Due to the radioactive environment, an accurate choice of components is required and the VME boards implement protections from Single Event Latch-up and from Single Event Upset.

3. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 3 ALICE TOF SYSTEM MRPC Detector  9100 ch. Front END Cards One TOF Sector (total=18) Environment Condition: Magnetic field: 5 KGauss, Radiation:1.2 Gy/10 years TID TOF water cooled Special Crates

4. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 4 TOF water cooled Special Crates ALICE TOF SPECIAL CRATE 48 cm 50 cm 28 cm VME & F-End Power Supply: Branch controlled power supply modules for VME boards and TOF detector front-end modules 2 ch. 3.3V / 100A, 11 ch. 2.7V / 7A, 1 ch. 5V / 2A. DAQ/Trigger/Distri bution Managers: Trigger Module (LTM), a Clock Distribution Module (CPDM) and a data readout manger (DRM) boards Fluid Coolers 12 slot VME64X Backplane Readout Modules (160x400mm): 2400 multi-hit 25ps TDC channels (9 or 10 TRM boards),

5. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 5 TRM ALICE TOF SPECIAL CRATE Block diagram To LHC CPDM TRM A1396/ A1395 Power Supply DRM VME Master MRPC Det. FEAC TRM ALICE DAQ 2400 ch. LTM ALICE DCS DDL SCL Ethernet LHC Trigger Control TTC ALICE TOF CLOCK Distributor Optical Link FEA SY1527 48 V 16 A A3485 AC/DC ALICE TOF SPECIAL CRATE 2.7 V 80 A EASY bus Branch Controller A1676 Trigger 3.3 V 200 A Single Board ON/Alarm for latch-up handling Front END Cards

6. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 6 TRM TDC Readout Module Board VME 64X interface Total: 30 HPTDC chip configured to 25 ps resolution = 240 channels 10 HPDTC Piggy Back 3 HPDTC 1 Temp. Sensor

7. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 7 Data Readout Manger DRM, Local Trigger Module LTM, Clock Distribution Module CPDM Controllers for DAQ/Trigger/Distrib. Prototipes: @ Dec 05 –DRM Tasks Read data on VME backplane (from TRM) Format and send data to central Alice DAQ through DDL (Data Detector Link) Provide interface with trigger TTC (Timing Trigger and Control) Provide Slow Control function/access to VME via SLC (Slow Control link) –CPDM Tasks Clock and test pulse distribution module Hosted only in one crate every two –LTM Tasks Produce trigger signals from coincidence of OR output of FEA Set/monitor FEA threshold and monitor FEA LV

8. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 8 Data Readout Manger DRM Master VME64XP BLT32, MBLT64, CBLT32, CBLT64 Optical Fiber (1.25 GHz Optical link) Optical Link SIU RX @ 10 MB/s SIU TX @ 100 MB/s Ethernet 10/100 Mbit/sec Piggy back Detector Data Link Source Interface Unit Detector Data Link Destinatio n Interface Unit linux embedded SBC (200MIPS RISC) Houses TTCrx :Timing, Trigger and Control Receiver ASIC for LHC Detectors

9. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 9 Local Trigger Module LTM VME64x slave Two FPGA on-board for trigger and slow controls (remote programming via VME) 24 10-bit ADC channels; 16 10-bit DACs 48 LVDS inputs with on-board digital programmable delay lines for skew adjustment 56 LVDS outputs External or local clock

10. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 10 Clock Distribution Module CPDM Tyco: CPDM side Fischer: TRM side 40 MHz input Clock FAN_OUT To TRM (x24) High quality clock cable Tested fan- out jitter < 10 ps 0 1 2 11 … Opt Rx Opt Post-amp LVDS fanout 0 1 2 212223 ATMEGA 16  C Latchup watchdog interface to DCS Pulse Strobe LEMO … Pulser Generator Inputs: clock optical receiver, pulse strobe (sent form LTM) Outputs: LVDS Clock to TRM, test pulse to pads (1x4 strips) NO VME INTERFACE

11. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 11 Power Supply Architecture SY2390 2 ch 3.3V / 100A, 11 ch. 2.7V / 7A, 1 ch. 5V / 2A. A1395 1 channel 3.3V / 100A, 4 temperature sensors A1396 11 canali 2.7V / 7A, 1 canale 5V / 2A. Geko General Controller 2 temperature sensors Tested up to 6,5 Kgauss,

12. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 12 Power Supply Block diagram EASY bus. A1395 A1396

13. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 13 Hostile Environment Radiation –Radiation levels expected at ALICE/TOF: 1.2 Gy/10 years (TID) –Total neutron fluence (>20 MeV): 1.6 10 9 /cm2/10 years. For ALICE/TOF careful design needed to handle SEU, Degradation for TID effects neglect able. Latchup protections needed. Magnetic field –The Crate Power Supply & Boards (TRM, DRM, CPDM, LTM) work under intense magnetic field: 5 K Gauss CAEN Power Supply design for hostile area (EASY) No cooling Fans: Water cooled system & T° sensors for safety

14. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 14 SEL protection: each board is divided in sections with separate Power supply. Each section is independently monitored and "protected" way (by a current-limiting device - MAX893L). An Atmel μC controls the Section’s Fault Indicators. SEU protection/detection (based on Radiation Tests) –FPGA : Vital sections use Flash based FPGA ACTEL (APA 600) Other sections use RAM based ALTERA FPGA (reprogrammed after a CRC error) –SRAM: CRC check implemented to identify data NOT valid –FLASH & Atmel μC (ATMEGA) No SEE observed –HPTDC LUT will be periodically monitored (CRC) + reload from Flash –Components: All Commercial devices radiation tested Radiation Tolerance

15. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 15 Cooling System Requirements –Electronics Max temperature 100°C. –Inlet cooling water temperatures and max temperature raise: Tin=15°C, Traise= 7 °C, Tout =22 °C –Available flow for each crate 4 l/min Crate power inventory –The total power dissipated for each TRM is 45 watt –In each crate are housed 9-10 TRM and the total power is 450 watt. –Considering to cool the power supplied the design power of the system is set to 1 Kwatt

16. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 16 Cooling System Layout TRM card is assembled with card-lok and aluminum heatsink plates 10 HPTDC boards assembled on the aluminum heatsink plates The front panel is assembled Card-lok heatsin k plates

17. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 17 Cooling System Layout aluminum heatsink plate Soft- Silicone Interface Material (Thermally Conductive ) Card-lok

18. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 18 Cooling System Layout Heatsink plate Card-lok Heat Exchangers Heatsink plate

19. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 19 Cooling System Thermal Analysis FEA 2D Model Feasibility analysis with 2D model (Card has a geometry and heat load symmetrical respect to a plane) Cooling channel Card-lok Mother board FR4 with 2 layers of cooper of 30 on the pcb24 and 2 layers of  m 70 of cooper on the main board Max Temp: 77.33° C FR4 with 1 layers of cooper of 30 on the pcb24 and 1 layers of  m 70 of cooper on the main board Max. Temp 88.37° C MODEL Results

20. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 20 Prototype Test Results CAEN Cooling System Test (No Magnetic Field) Room Temperature  27 ° C OFF water flow ON water flow Board TRM 9 Sensors Temperature

21. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 21 Prototype Test Results CERN Test Magnetic Field > 5000 Gauss Room Temperature  22-23 ° C Termal image After Crate Power-on Termal image After  4 h of prototype test Magnetic Field = 5300 Gauss

22. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 22 Acknowledgements Rosario Nania Pietro Antonioli Eugenio Scapparone Federico Cindolo INFN Bologna, Via Irnerio 46, Bologna Italy Crispin Williams CERN