stefano russo universita’ di napoli federico ii & infn km3net meeting pylos 16–19/4/2007 the...

stefano russo Universita’ di Napoli Federico II & INFN Km3Net meeting Pylos 16–19/4/2007

The NEMO DAQ electronics:

Actual characteristics and new features

NEMO tower layout

Secondary

Junction-Box

Tower Base

FCM

(Floor Control Module)OM-PMT &

FE electronics

Electrical link

Optical link

Optical link

40m

40m

40m

150m

Floor 16

Floor 15

Floor 2

Floor 1

PMT1 PMT2

PMT3 PMT4

10m

10Mbps

•The basic self consistent element is the tower

•Main components: o Optical module (PMT and FE)o Floor Control Moduleo Junction Box


•One floor data is received on shore by twin FCM board plugged on host machine

Data transmission

•Optical module data coming from 4 Front End modules (FEM)

FEM#2 FEM#3

FEM#0 FEM#1Sea

Shore

Storage and data manager

•Off shore data concentration is carried out by Floor Control Module Board (FCMB)


Front End Module Board

•Signal sampling: •double 100 MHz 8 bit ADC’s•quasi-logarithmic compression (13 bits)•On board calibration circuit

•PMT HV management •Low power •Safe configuration from remote•Optical Module housekeeping


Floor Control Module Board

•Off shore - On shore link •FEM interface•Fiber Optic interface DWDM transceiver

•Communication with other electronics: •Slow control board•Time Calibration

•Other features: •Safe remote reconfiguration


Floor Control Module Board data bridge

Electrical Interfaces for 4 Optical Modules

(up to 8)

3 Differential Lines: Tx Clock line (5 MHz) Tx Data line (5 Mbps) Rx Data line (20 Mbps)

Spartan-3 FPGAbridges optics and

OMs

Electro-Optical Interface:

Ser-Des (up to 1.4 Gbps) + DWDM

compliant Transceiver


Freescale DSP56301 with PCI 32/33 interface:• Board Debug• System control and management• On-shore data and slow control extraction• Measured sustained performance: 60MBps

Slow Control board connector: electrical link

with SPI interface

Time calibration connector:

• set calibration parameters• trigger optical pulses to OMs

Power Area: linear LDO regulators to minimize

noise.

On-shoreClock Input

Floor Control Module Board interfaces


Clock distribution:On shore

Time station (GPS)

Slow clock

PLL

Sys clock

Data

Data + clk to off shore

Sys clock


Clock distribution:Off shore

Sys clock

Data

Data + clk from on shore

Clock and data on the same fiber


The FCMB forNEMO phase 2

•FE embedded on FCMB

•New AD converters: one 12 bit 200 MHZ ADC per PMT

•New on shore interface (1 Gbit Ethernet or PCI Express)

Secondary

Junction-Box

Tower Base

FCM

(Floor Control Module)

OM-PMT

Analog signals

electrical link

Optical link

40m

40m

40m

150m

Floor 16

Floor 15

Floor 2

Floor 1 PMT1 PMT2

PMT3 PMT4

10m


The new FCMB

Optical Communication

Mezzanine

FPGAXilinx V5

FE Section

ADC #1

ADC #2

ADC #3

ADC #4

Amp & Co.

Amp & Co.

Amp & Co.

Amp & Co.

12 pairs LVDS

12 pairs LVDS

12 pairs LVDS

12 pairs LVDS

Debug

On shore Com

JTAG

Mem

FlashSRam

RS2323#1

PCIe

RS2323#2

Clk @ 200 MHz

RS232

PLL

Clk from shore

Localoscillat

or

From Time station

RJ 451GB

RJ 45

SystemClk

power

DC/DC

from floor module

Power to PMT and OM

Off shore instrumentation

hydrophones


NEMO phase 2

•FE embedded on FCMB

•One 12 bit 200 MHZ ADC per PMT

•Gbit Ethernet or PCI Express on shore interface

DC/DC power

•FE into OM

•Two 8 bit 100 MHZ ADC’s per PMT

•PCI on shore interface

•AC/DC power

NEMO phase 1 VS


The next phase:Copper data link

Secondary

Junction-Box

Tower Base

FCM

(Floor Control Module)OM-PMT &

FE electronics

Analog signals

electrical link

Optical link

40m

40m

40m

150m

Floor 16

Floor 15

Floor 2

Floor 1

PMT1 PMT2

PMT3 PMT4

10m


NewCommunication

Mezzanine

FPGAXilinx V5

FE Section

ADC #1

ADC #2

ADC #3

ADC #4

Amp & Co.

Amp & Co.

Amp & Co.

Amp & Co.

12 pairs LVDS

12 pairs LVDS

12 pairs LVDS

12 pairs LVDS

Debug

On shore Com

JTAG

Mem

FlashSRam

RS2323#1

PCIe

RS2323#2

Clk @ 200 MHz

RS232

PLL

Clk from shore

Localoscillat

or

From Time station

RJ 451GB

RJ 45

SystemClk

power

DC/DC

from floor module

Power to PMT and OM

Off shore instrumentation

hydrophones

The next phase:Copper data link

stefano russo universita’ di napoli federico ii & infn km3net meeting pylos 16–19/4/2007 the...

Documents

napoli federico

infnkm3net meeting pylos

floor data

vsstefano russo universita

omsstefano russo universita

fiberstefano russo universita

board debug system control

tx data line