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VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NET-IT TOWERDATA ACQUISITION AND DATA TRANSPORT
ELECTRONICSCARLO A. NICOLAU
ON BEHALF OF THEKM3NET – ITALY COLLABORATION
Outline:
• KM3NeT-Italy Layout
• Tower Layout
• Data and Timing Link
• Floor Electronics
• Optical Module Electronics
• Conclusions
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
375 VDC
KM3NeT – IT Layout
Shore Laboratory in Capo Passero harbour
Control Room
Guest House
DAQPower Feeding
Equipment
ON-SHORE OFF-SHORE
20 x opt. fibers
up to 10 kV
~100 km
MVC Opt. Splitter
JunctionBox
JunctionBox
KM3NeTString DUs
TB
FCM
FCM
FCM
FCMKM3NeT-ITTowers
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Tower Layout
TB
FCM
FCM
FCM
FCM
Tower Base
Floor #1
Floor #2
Floor #13
Floor #14
JunctionBox
375 VDC
2 opt. fibers
Detection Unit Characteristics
• Design based on NEMO• All data to shore approach• Tower
• 14 Floors• Vertical floor spacing is 20m• Star connection topology
• Base Module• Optical link distribution DWDM• Power control and distribution
• Floor• 8 m long• Floor Control Module Vessel• 6 Optical Modules• 2 Hydrophones
• Optical Module• Single 10” PMT• Front End Module• LED Beacon (2 per floor)
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Tower Base
TOWER BASE
E
MAN
IFO
LD
1
2
...
JUN
CTIO
N B
OX
E
OO
13
14
FLOOR 1
FLOOR 14
E
OELECTRONICS POD
POWER POD
PHOTONICS POD
E O E O
E O
E O E O
E O
Tower Base Module
• Contains 3 vessels• Photonics Pod• MUX/DEMUX lambdas from/to floors
• Power Pod• Distribution, Control, Monitoring
• Electronics Pod• Communication, Monitoring,
Laser beacon control
uCAD
V-I M
onito
r
375
V
F1 F2 …. F14
Power Pod Photonics Pod
DRO
PAD
D
OptAmp
OptAmp
BTS
BTS
To Floors & E. Pod
From Floors & E. Pod
Electronics Pod
Tower Base Control Module
Board(same as Floor)
PSS Board375 V
Power PodRS232
Photonics PodRS232
HydrophoneAES3
Laser Beacon Controller
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Floor Layout
FCM
KM3NeT-ITFloor
To/fromother5 OMs
To/from2 x Digital St. Hydr.
Front End Module Board
HVPSU
OpticalModule
Center - FloorVessel
PSSBoard
Floor Control Module Board
375 V
To/f
rom
Tow
er B
ase
Power, ClockData IN/OUT
12V, ClockAES3
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Data & Timing Link Model
GPS
GPS
Tim
e D
istr
ibuti
on
DWDMMUX
DWDMMUX~100km
FCM
KM3NeT-ITFloor
• Point to point link
• Each Floor is assigned a couple of
lambdas (rx/tx) in DWDM spectrum
• Standard component
• Lambda drift monitoring and tuning
• Fully synchronous link
• Clock, Data and Timing embedded
in a single 8b/10b stream
• Each device is time-stamp aware
• Fixed latency
• Round-trip time monitoring
+ pre-deployment calibration
GPS TimeDistrib. FCM FEM
Phase Noise JitterLab Measures
(Agilent E5052B SSA)
10 MHz38.5 ps rms
80 MHz9.7 ps rms
Recovered80 MHz
35.2 ps rms
Sampling Clock200 MHz
52.3 ps rms
DAQFPGA (short)
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Center Floor Electronics
OM #0
RS232 PortCompass (+3.3V)
RS232 PortExt Instrument(Isolated, +12V)
2 x Digital AES3Hydrophone
Spare RS232 Port(Isolated, +12V)
OM #1OM #2
OM #3OM #4
OM #5
375 V
Power Connectors1.2 V, 3.3 V, 5 V, 12 V(V & I Measurement)
Spartan 6 FPGA• Fixed-latency transceiver• No external PLL• 6 x OM interfaces (clock distribution, data rx / tx), 2 x AES3• Host a microblaze-based system on-chip
• Slow control communication• Slow-control functions (OM power control and monitoring)• Voltage and Current Monitoring• I2C bus, Serial Ports• Flash Read/Write
• Full remote safe reprogrammability with multiboot (3 full images + data)
Power Supply System
Floor Control Module
H/TSensor
DC/DC Converters 375 V -> 5 V 5 V -> 12 V 5 V -> 1.2V, 2.5V, 3.3V
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Optical Module Layout
HVPSU
CLOCK
DIN / VCC
DOUT / GND
TO/
FRO
M F
CM
USER CONN(Power, AIN, GPIO, I2C, RS232, ...)
GATE In
PMT signal
HVPSUPowerControlFeedback
LED BeaconPowerTrigger
Front EndModule
PMTLPFADC14 bit
200 Mhz
L0-Trigrising and falling
thresholds
FIFO2048 Samples+ timestamp
Timestamping
8b/10b enc.To FCM
20 Mbps
Data Acquisition Chain
current pulses~3 ns rising time
voltage pulses~15 ns rising time
Samples14 bit / 200 Mhz
Timestamp (5 ns) + SamplesEvents: Timestamp (5 ns) Waveforms
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Front End Module
Analog Front End• Differential shaping filter• Linear• Fully passive• Adjustable Offset
T/H I2C sensor
Slow DACs/ADCsAFE conditioning (pedestal)HVPSU Control / monitoringLED-Beacon control
LED Beacon VDC/DC based generator (24V)
Clock out driver
DC/DCs LMZ10501
Line Interface• Clock (LVDS)• DATA IN/OUT (LVDS)• GND/VCC on COM
Fast ADC TI ADS4149Differential 200 MHz 14 bit
Spartan 6LX25 FPGA• Level 0 trigger (zero-skipping)• Programmable threshold• Programmable number of tail samples• 2 ksample FIFO• Timestamping• Lossless compression on spe• Line interface encode/decode• Rate monitoring in realtime• Sustained spe rate up to ~150kHz• Microblaze-based SOC• Full remote safe reprogrammability with multiboot (3 images + data)
DAQ Core
FSL
H/T SensorSensirion SHT21
3 x Ext. Serial Ports
Micron N25Q032FlashI2C
16bit DAC
16bit ADC
HVPSU Control& monitor
uBlazeSPI
UART
16bit DAC
16bit ADC
AFE Control & Monitor
AD414914bit/200MHz
Config.
64kB
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Front End Module
Data acquired by tower #0 in 2014/nov
nhits : ~150k mean : 9.5 pC std : 6.2 pC
spe peak
~1/4 speEquivalent threshold
Pedestal
Linear analog frontend fixed relation ADC channel vs input current
( ~0.0228 pC per ADC channel)
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Conclusions
Dissipative linearvoltage regulators Active low noise DC/DC
5 different boards 2 boards
7 processing units3 architectures(Xilinx FPGA, Microchip PIC,Freescale DSP)
1 processing unit1 architecture(Xilinx FPGA w/ uBlaze MCU)
Previous Design(NEMO)
KM3NeT-IT
Dissipative linearvoltage regulators Active low noise DC/DC
2 x 8 bit ADC (100 Msps)Non-Linear Analog Comp.
Single ADC 14 bitLinear Front end
2 processing units2 architectures(Xilinx FPGA, Freescale DSP)
1 processing unit1 architecture(Xilinx FPGA w/ uBlaze MCU)Same codebase as FCM
Floo
r Con
trol
Mod
ule
Fron
t End
Mod
ule
Easier code maintainance• From VHDL / DSPASM / C To VHDL / C++• One common code-base for all slow-control functions and communication
Simplified elaborationNo need to “decompress” signalsSimplified calibration processNo need to calibrate each single FEM at different temperatures
Reduced power consumptionFEM : From ~2 W / OM To ~1 W / OMFCM: From ~7.5 W To ~3 W
Simplified integration, lower cost
VLVnT 2015 – Very Large Volume Neutrino Telescope 14 – 16 September 2015, University “Sapienza”, Rome - Italy
Carlo A. Nicolau – INFN Sez. [email protected]
KM3NeT-IT Tower – Data Acquisition and Data Transport Electronics
Thank You