Compact data acquisition and power supply system designed

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 11 th Workshop on Electronics for LHC and future Experiments Heidelberg, Germany, 15 September 2005 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field

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 VME 64 X bus that houses 2400 multi-hit 25 ps 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. Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 2

ALICE TOF SYSTEM MRPC Detector 9100 ch. Front END Cards One TOF Sector (total=18) TOF water cooled Special Crates Environment Condition: Magnetic field: 5 KGauss, Radiation: 1. 2 Gy/10 years TID Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 3

12 slot VME 64 X Backplane ALICE TOF SPECIAL CRATE DAQ/Trigger/Distri bution Managers: Trigger Module (LTM), a Clock Distribution Module (CPDM) and a data readout 28 manger cm (DRM) boards Readout Modules (160 x 400 mm): 2400 multi-hit 25 ps TDC channels (9 or 10 TRM boards), VME & F-End Power Supply: Branch controlled power supply modules for VME boards and 48 cm TOF detector front-end modules 2 ch. 3. 3 V / 100 A, 11 ch. 2. 7 V / 7 A, 1 ch. 5 V / 2 A. Sep 15, 2005 TOF water cooled Special Crates 50 Fluid cm Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field Coolers 4

ALICE TOF SPECIAL CRATE Block diagram Front END Cards MRPC Det. 2400 ch. TRM TRM FEA FEAC To LHC Trigger ALICE TOF CLOCK Distributor LTM CPDM DRM TTC ALICE DCS SCL VME Master LHC Trigger Control DDL ALICE DAQ Ethernet Sep 15, 2005 Optical Link 2. 7 V 80 A 3. 3 V 200 A A 1396/ A 1395 Power Supply 48 V 16 A A 3485 AC/DC EASY bus Branch Controller A 1676 Single Board ON/Alarm for latch-up handling ALICE TOF SPECIAL CRATE Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field SY 1527 5

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

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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 7

Optical Fiber (1. 25 GHz Optical link) Houses TTCrx : Timing, Trigger and Control Receiver ASIC for LHC Detectors Detector Data Link Destinatio n Interface Unit Optical Link SIU RX @ 10 MB/s SIU TX @ 100 MB/s Sep 15, 2005 Data Readout Manger DRM linux embedded SBC (200 MIPS RISC) Ethernet 10/100 Mbit/sec Master VME 64 XP BLT 32, MBLT 64, CBLT 32, CBLT 64 Piggy back Detector Data Link Source Interface Unit Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 8

Local Trigger Module LTM • VME 64 x 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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 9

Clock Distribution Module CPDM FAN_OUT To TRM (x 24) Tested fanout jitter < 10 ps 0 1 2 … 11 Pulse Strobe 0 1 2 … High quality clock cable 21 22 23 Tyco: CPDM side Opt Rx LEMO Pulser Generator 40 MHz input Clock LVDS fanout Opt Post-amp ATMEGA 16 C Latchup watchdog interface to DCS Fischer: TRM side Inputs: clock optical receiver, pulse strobe (sent form LTM) Outputs: LVDS Clock to TRM, test pulse to pads (1 x 4 strips) NO VME INTERFACE Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 10

Power Supply Architecture A 1396 11 canali 2. 7 V / 7 A, 1 canale 5 V / 2 A. Geko General Controller 2 temperature sensors Tested up to 6, 5 Kgauss, A 1395 SY 2390 2 ch 3. 3 V / 100 A, 11 ch. 2. 7 V / 7 A, 1 ch. 5 V / 2 A. Sep 15, 2005 1 channel 3. 3 V / 100 A, 4 temperature sensors Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 11

Power Supply Block diagram A 1395 EASY bus. A 1396 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 12

• Radiation Hostile Environment – Radiation levels expected at ALICE/TOF: 1. 2 Gy/10 years (TID) – Total neutron fluence (>20 Me. V): 1. 6 109 /cm 2/10 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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 13

Radiation Tolerance • 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 - MAX 893 L). 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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 14

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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 15

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

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

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

Cooling System Thermal Analysis Feasibility analysis with 2 D model (Card has a geometry and heat load symmetrical respect to a plane) MODEL Results FEA 2 D Model Cooling channel Card-lok Mother board FR 4 with 2 layers of cooper of 30 on the pcb 24 and 2 layers of mm 70 of cooper on the main board Max Temp: 77. 33° C Sep 15, 2005 FR 4 with 1 layers of cooper of 30 on the pcb 24 and 1 layers of mm 70 of cooper on the main board Max. Temp 88. 37° C Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 19

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 Sep 15, 2005 Compact data acquisition and power supply system designed for hostile environment condition concerning radiation and magnetic field 20

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

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