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The Antares collaboration
Astronomy with a Neutrino Teslescope
ANTARES
And Abyssal RESearch
180 physicists, astronomers and sea science
specialists
Main goal search for high energy cosmic
neutrinos, indirect search of non baryonic dark
matter, neutrino oscillations
Principle of the detection Detection of upward
going muon produced in a neutrino interaction in
the medium surrounding the detector. The muon
emits Cherenkov light which is detected by a
network of photo-sensors.
Scheme of the Antares detector
The detector site
14.5 m
The MILOM insrumentation line operating since
April 11th 2005
Local control module hardware devices
(LCM) Contains all the off-shore electronics.
Sends to the shore the digitized PMTs signals.
Mini Instrumentation Line with Optical Modules
Goals

• Environmental parameters Measurements
• Genisea Sound-velocity meter for acoustic
  positioning
• C-STAR water light attenuation meter
• RDI Acoustic Doppler Current profiler
• SEABIRD Conductivity Temperature sensor
• GURALP wide-band seismometer
• Calibration devices control
• Acoustic positioning hydrophones and pingers
• Optical calibration devices
• LASER Beacon _at_bottom
• LED Beacon
• Acoustic environmental noise measurements The
  Spy Hydrophone system
• A long term at large depth observatory in the
  mediterranean sea

Optical detection string
ITEP Spy-hydrophone
POWER_BOX
Inside a Local Control Module
LED Beacon

Acoustic Current Profiler
Sound-velocity meter
Acoustic positionning Hydrophone
Optical Modules
x 3
x 4 in case of LED beacon
Seabird Conductivity temperature
LED Beacon
COMPASS_MB
CSTAR light transmissiometer
HydroSpy DAQ Board
Power Junction Box
Acoustic positionning Hydrophone and pinger
Laser Beacon
Seismometer

• Low cost Embedded Ethernet Microcontroller
• RCM3200 RabbitCore
• 100 Base-T Etherrnet
• Rabbit 3000 microprocessor up to 44.2 MHz
• Low-EMI features
• 512K Flash, 512K SRAM (program), 256K SRAM (data)
  
• 52 digital I/O, 6 serial ports

An embedded DAQ system for acoustic signals in
Mediterranean deep sea
BidiPhoton Ethernet bi-directional Optical link

• Sea ambient noise studies, biological, navy
  sounds
• Acoustic detection of High Energy Particles
  (10-50KHz range )
• Acoustic positioning device
• Development of a low cost autonomous ,
  continuous and embedded DAQ system with high
  resolution(16 Bits ADC) and high rate(400KHz).

• Burr-Brown ads8322
• High-speed parallel interface
• 500 kHz Maximum sampling rate
• Low power 85mW at 500kHz

FPGA Altera 10K50E for ADC control
Client / Server Application
Graphical User Interface

• Maximum acquisition speed 3Mbps
• Continuous acquisition within 0.5 s.
• at 400 kHz sampling frequency
• Ethernet transfer latency 1s.
• Absolute timing tag of data frames less than 1µs
  (ANTARES clock system 100ps jitter)
• Positioning accuracy 5cm

Java program running on Linux (ON-SHORE)
OFF-SHORE embeddedAcoustic detection system
Network (TCP/IP)
Server Application running on RCM3200
microcontroller
Onshore Client Application
Controls acoustic detection system
Listens for incoming instructions
Sends sampled data to Client application
Receives data from server and stores in files
Triggered events
Auguste LE VAN SUU CPPM Marseille-CNRS/IN2P3-Franc
e Levansuu_at_cppm.in2p3.fr On behalf of the
ANTARES collaboration http//antares.in2p3.fr