1. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI1 FMD – Forward Multiplicity Detector ALICE Meeting on Rad. Tolerant Electronics CERN, 30 August 2004 Børge Svane Nielsen Henrik Bertelsen Niels Bohr Institute 1.Silicon strip sensors: Hamamatsu 2.Preamp-shaper chips: VA1_ALICE in production 3.Hybrids: VA1_ALICE with passive components 4.FMD Digitiser Card: Design based on TPC FEC and ”known” VA1 read-out protocol 5.Read-out and Controls: TPC RCU

2. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI2 Five FMD Rings FMD 3 FMD 1 FMD 2 ITS Support plates Hybrid and sensor FMD Digitizer

3. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI3 Radiation environment Doses and Fluences in Central ALICE (10 years running): Belle measurements =0.33 Mrd Doses in FMD: Dose [Gy] h-  [cm**-2] FMD380-13509-14 E+11 FMD240-23001.4-6.5 E+11 FMD1900-33002.5-5.6 E+11

4. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI4 FMD sensors 512 strips 256 strips Inner module Outer module Si strip sensors from 6” wafers. Manufactured by Hamamatsu.

5. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI5 Sensor design Design very similar to CMS sensor, except: geometry “standard” ~ 5k  cm high resistivity silicon

6. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI6 Read-out and Controls FMD Module ON DETECTOR IN COUNTING ROOM VA 1 ring: 10/20 modules 2 Digitizers 1 RCU per ring system Full FMD: 70 modules 10 Digitizers 3 RCU’s VA read-out control VA read-out control TTC-RX BOARD CTRL FMD Digitizer ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) Read-out CTRL BSN, 17 Feb 2004 Local Monitor and Control BOARD controller Bus controller ( conf. & R/O ) DCS int. (Ethernet) DAQ int. (DDL-SIU) Trigger int. (TTC-rx) Data Proc. and Memory DCS DDL TTC optical Link (Clock, L1 and L2 ) RCU Front-end bus ~ 3 m Front-end bus ~ 3 m  16 Control Network (I 2 C-serial link) Control Network (I 2 C-serial link) Trigger L0 NEAR PATCH PANEL Analog serial link (10 MHz)  0.5 m Analog serial link (10 MHz)  0.5 m

7. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI7 Custom preamp-shaper chip: VA1_ALICE in production VA1_ALICE a VA1 in 0.35 µm technology VA1_ALICE a VA1 in 0.35 µm technology Radiation hardness> 500-1000 krad Peaking time 1.2-1.5  sec (optimised at 1.35  sec) Noise (ENC)< 500 e- (= 0.02 MIP) Capacitance matching5-25 pF Dynamic range0-20 MIPs (or ±10 MIPS) Highly integrated128 channels per chip Read-out speed~ 10 MHz Test and calibration circuits included Power consumption0.8 mW per channel Compatibility with ALTRO requires level shift Early prototypeVA1’ useful Affordable costyes Channel count51,200 (400 chips à 128 channels) 45  m input pitch

8. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI8 VA1_ALICE noise simulations Leakage current 3 nA

9. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI9 Connectors for power, control, read-out, bias Hybrids VA1_ALICE (128 channels) Inner module pitch adapter (ceramics) bonding Si sensor passive components

10. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI10 FMD Digitizer VA read-out control VA read-out control FMD Digitizer ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) Read-out Controller (FPGA) Read-out Controller (FPGA) ALTRO-RCU Front-end bus  3 m ALTRO-RCU Front-end bus  3 m Control Network (I 2 C-serial link) Control Network (I 2 C-serial link)  16 CLK (10 MHz) CLK (10 MHz) Power regulators Trigger LVL0 Trigger LVL0 LV power -2.0 V +1.5 V LV power -2.0 V +1.5 V VA power Differential receiver + Level shift  16 FE preamps Bias settings (DAC) VA biases Multiplexed read-out 128 channels @ 10 MHz JTAG

11. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI11 FMDD study set-up

12. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI12 RCU location RCU FMDD DAQ Patch panel “TPC” Front-end bus and Control bus ~ 3 m

13. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI13 FMD Module ON DETECTOR IN COUNTING ROOM VA 1 ring: 10/20 modules 2 Digitizers 1 RCU per ring system Full FMD: 70 modules 10 Digitizers 3 RCU’s VA read-out control VA read-out control TTC-RX BOARD CTRL FMD Digitizer ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) ALTRO (16 ch) Read-out CTRL BSN, 17 Feb 2004 Local Monitor and Control BOARD controller Bus controller ( conf. & R/O ) DCS int. (Ethernet) DAQ int. (DDL-SIU) Trigger int. (TTC-rx) Data Proc. and Memory DCS DDL TTC optical Link (Clock, L1 and L2 ) RCU Front-end bus ~ 3 m Front-end bus ~ 3 m  16 Control Network (I 2 C-serial link) Control Network (I 2 C-serial link) Trigger L0 NEAR PATCH PANEL Analog serial link (10 MHz)  0.5 m Analog serial link (10 MHz)  0.5 m Read-Out modules

14. ALICE Rad.Tolerant Electronics, 30 Aug 2004Børge Svane Nielsen, NBI14 Summary Electronics components of FMD:  Preamp-shaper-multiplexer on hybrid: VA1_ALICE in 0.35 µm technology by IDEAS, Oslo Rad.level 200-3300 Gy  FMD Digitizer: use ALTROs and TPC FEC schematics + VA1 read-out protocol with common 10 MHz clock, to be built at NBI, Copenhagen Need to be aware of higher rad. levels than at TPC Rad.level 100-1000 Gy  RCU identical to the one from TPC and PHOS Rad.level 10-100 Gy