SVD DAQ 25 Jan 2011 Belle2 DAQ T. Tsuboyama (KEK)

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Presentation transcript:

SVD DAQ 25 Jan 2011 Belle2 DAQ T. Tsuboyama (KEK)

Outline Outline Outline FADC FADC FTB and Timing distribution FTB and Timing distribution Schedule Schedule 2 25 Jan 2011 SVD DAQ Toru Tsuboyama (KEK) This talk is based on slides shown in Krakow meeting in Dec and B2GM in Nov. 2010, especially by M. Friedl and W. Ostrowicz.

System Overview The SVDDAQ consists of Frontend, Junction box, FADC, FTB. The timing and trigger control, nor the link to PXD, is not shown in this slide APV25 chips Front-end hybridsRad-hard voltage regulators Analog level translation, data sparsification and hit time reconstruction Unified Belle II DAQ system ~2m copper cable Junction box ~10m Thicker copper cable FADC+PROC C O P P E R Unified optical data link (>20m) Finesse Transmitter Board (FTB) 3 25 Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Front end --- APV25 The APV25 chips are designed for CMS at LHC Intrinsically radiation hard, short-shaping and pipe-lined. Suitable for Belle2 SVD. The analog information can be used for wave form fit and hit time reconstruction for further background reduction Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

More on APV25 APV25 has a 192-cell pipe line in each channel. 32 bit queue for readout. In order to accommodate the 5  sec trigger latency, APV25 will be operated with 32 MH clock sacrifying 20% slower readout time. Dead time at front end. With a trigger rush, the readout queue may be filled up. Then further triggers can not be treated correctly, which causes dead time. We should send “busy” to CDAQ in a such case. For the recognition of “queue full” in APV25, an APV25 queue emulator will be implemented in the FADC timing controller Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

The Belle detector upgrade 625 Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Junction Box Just connectors and rad-hard voltage regulators (possibly with remote sensing to hybrids) APV Operation voltage 2.5V Absolute maximum voltage 2.7V Only 20 / 50 pins of hybrid cable are signals  merge 2 front-end cables into one (same) signal cable to FADC PXD may need a similar box. Junction box 7 25 Jan 2011 SVD DAQ Toru Tsuboyama (KEK) ?

FADC We proved that APV25 can drive 100  twisted line for > 10 m. Repeaters are not necessary. Analog Signal receivers can be very simple. 24 channels/board. (80 boards necessary.) Integrating repeater (level translation) into FADC boards 24 inputs per board (6 x 4 or 4 x 6 APVs x hybrids)  80+ VME boards in total Needs to become more compact to fit onto a single board 8 25 Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

FADC Scheme: Baseline Level Translation at front-end interface Majority of board operates at ground (earth) levels Follows existing scheme 9 25 Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

FADC Scheme: Alternative Level Translation at module rear Generally I do not consider this scheme very practical Probably the only kind of advantage is that all translations become digital Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Existing REBO Optocouplers (slow controls) REBO3 uses single optocouplers for digital slow controls Amplifiers (signals & CLK/TRG) –REBO3 uses two amplifiers per channel, one on each HV and LV sides Voltage Level Translation Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Level Translation – Digital Existing REBO3 HCPL0701 (1 optocoupler per SO8 package) used for digital slow controls (I2C and reset) Alternative 1 HCPL0731 has 2 couplers in the same package Alternative 2 Use digital isolators such as ADuM couplers in SO16 package (~2 x SO8) Faster versions would even allow translation of CLK and TRG Need to evaluate noise performance and operation frequency Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Existing REBO3 first amp is actually attenuator and thus unnecessary Future circuit AD8132 to be replaced by simple resistor (or divider) EL5173 could be replaced by EL5373 (3 channels), but ~3x bigger Level Translation – Analog Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

SVD DAQ Toru Tsuboyama (KEK) ADC Input Existing FADC AD8128 equalizer to compensate frequency-dependent cable loss EL5173 to convert AD8128 output back to differential Even more amplifiers on ADC daughter board Parallel ADC data output Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

FADC Improvements No need to drive CAT7 cable anymore  reduce overall number of amplifiers in readout chain Frequency response in the cable will be corrected by a digital FIR filter inside FPGA (feasibility study will be made in soon) in order to retain fully differential signal path. Dual-ADC (AD9218) with 10 bit parallel outputs  8-channel ADC (AD9212) with serial outputs (has ~same size as the dual ADC) 5 old (but cheap) FPGAs (Altera Stratix 1 – EP1S20)  single powerful FPGA (Altera Stratix 4GX – EP4SGX180KF40C4N Communication between VME FPGA and other FPGAs was done by parallel busses  serial communication between VME and central FPGA Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

APV25 Sufficient thinned & non-thinned devices exist V DD voltage must be kept ≤ 2.7V Junction box scheme established Connectors and rad-hard voltage regulators Several improvements suggested for FADC Simplification of voltage level translation ADC inputs (FIR filter) Serial links instead of parallel busses Location for FADC racks On top of yellow rail beams Possibly with power supplies Summary Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

FTB (Finesse transmitter Board) 1. FTB design: a. SVD Electronics - general view b. Two boards - one set c. Results of meeting with Zhen’an Liu, Hao Xu and Mikihiko Nakao. 2. Prototype design: a. Prototype – double functionality b. Prototype - tests setup Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

SVD Electronics - g eneral view PIXEL DAQ Giessen Box opt F E E l e c t r o n i c s TTD RJ45 #1 #81 #80 RJ45 … #2 COPPER#40 opt FRB COPPER#2 opt FRB COPPER#1 opt FRB … #1#40 FTB#80 opt FADC#80 RJ45 FTB#2 opt FADC#2 RJ45 FTB#1 opt FADC#1 RJ45 SVD electronics SVD-CONTROLLER (SVDctlr) FCRB RJ45 SVD tracker Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Two boards - one set HSD Link (k) k=1..40 From/to TTD (2k-1) From/to TTD (2k) To PXD (k)DATA (2k-1) + (2k) 1. The same PCB 2. The same module 3. The same firmware DATA (2k-1) DATA (2k) DATA (2k) + (2k-1) FTB#(2k-1) OpTr FTB fmw RJ45 Unified core 2 Unified core 1 FPGA FTB#(2k) OpTr FTB fmw RJ45 Unified core 2 Unified core 1 FPGA From/to FADC (2k-1) From/to FADC (2k) Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

FPGA CDC readout FPGA HSLRB Line rate=1.5Gbps CLK_Lk=200MHz, CLK_FEE=125MHz CLK_Lk=200MHz, CLK_CO=42.3MHz Results of meeting … 1. Belle2Link: a. Line rate 1,5 Gbps (3 Gbps works) b. Clock sources (common clock from TTD = 127MHz): - On-board = 200MHz - RJ pair = 127MHz - FINESSE-C RCK pair = 42MHz c. Common CLK via RJ45 in case of test without TTD? There is no ‘busy’ signal via Belle2Link – I prefer to have such signal between FADC and FTB (FTB busy). But …???

REGISTERS FTB FPGA UNIFIED CORE COPPER Belle2Link Exactly the same protocol & timing for REGS HSLB CSBLRWLA[6..0]LD[7..0] CSBLRWLA[6..0]LD[7..0] Mandatory Registers implemented on both sides.It is unique information for every single board (TYPE[15..0], SERIAL#[15..0])How to keep information after power down? -> nonvolatile memory (EPROM) on FTB.FADCs do not need user defined registers for parameters loading/reading. It will be usedother solution. (Nakao was interested which way…) Results of meeting … d. Registers: mandatory and user defined Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Results of meeting … Future (near???): - universal firmware? – in plans - modules for sub-groups for testing? – they plan… - any NOTE describing rules and requirements – not yet but… Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Results of meeting … 2. TTD link: ACK, TRG, CLK, RSV. a) ‘ACK signal (1-2 pair) is a serialized response information to the central timing system’ – is it the same/similar as ‘BUSY’ signal? - similar. Any description how to manage the ACK signal. – not yet b) any RESET via TTD link? – yes. As minimum TRGnb = 0, clear Data Fifos, no reload the firmware. What does RESET mean for FADC? c) any firmware? – maybe soon?? d) any NOTE describing rules and requirements – not yet but… 3. JTAG link e) For firmware loading – one cable per one board? – not decided yet f) After firmware loading – what with info in mandatory regs? – ext. EPROM

FTB functionality + tests possibility FPGA Spartan6 RJ45 Prototype – double functionality OpTr DRIVERS POWER OSC 42MHz 160 pin connector ext POWER Regs handler FTB components + test components DRIVERS Clock distrib RJ45 config Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

SVD FINESSE COPPER in Cracow Prototype - tests setup FPGA Spartan6 RJ45 OpTr DRIVERS POWER OSC 42MHz 160 pin connector ext POWER Regs handl DRIVERS Clock distrib RJ45 config FPGA Spartan6 RJ45 OpTr DRIVERS POWER OSC 42MHz 160 pin connector ext POWER Regs handl DRIVERS Clock distrib RJ45 config FTB prototype – FINESSE adapter SVD FINESSE 42 MHz Power Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

At side of KLM Accessible during running Or on top of KLM (but then locked) When I showed this slide at the B2GM, I noticed that Haba-san shook his head… Location for FADCs Approximately here 1 rack on each side (forward, backward) is enough Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

24 Jan 2011 Location for FADCs There is a lot of space on top of the yellow rail beams No conflict with existing installations so far (probably PXD also think of this space) Need to build access infrastructure. This is not an obstacle. Although we can not access to this area when accelerator is in operation We may put FADC racks (1 forward, 1 backward) + power suppplies there Jan 2011 SVD DAQ Toru Tsuboyama (KEK)

Schedule Jan 2011 SVD DAQ Toru Tsuboyama (KEK)