CDF

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Simon Bevan Dave Waters

• What are we trying to do ?
• Status of the project

• ARENA 06

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Neutrino Astronomy
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Acoustic Detection
Mechanism first described by Askaryan (1957)
Hydrodynamical emission of tracks of ionising
particles in stable liquids.
slow heat diffusion
Temperature or Volume
fast thermal energy deposition
Time (arbitrary units)
?t
h
h
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Detection Methods
optical cerenkov
radio
acoustic
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Detection Media

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ACORNE Project

• Record data from an existing MoD hydrophone array
  at RONA.
• Develop a deployable realistic emulation
  device.
• Develop simulation, signal processing and event
  reconstrution techniques.

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ACORNE Project Status

• Hydrophone Studies
• Fish tank at Sheffield in place - being used to
  study hydrophone response and test calibrator
  ideas.
• Calibration Device
• Lasers high power LEDs have been the main
  focus so far..
• Proving tricky to put 1 Joule into water in 10?s
  quietly! Work is proceeding on a number of
  fronts
• heating elements with mechanical acoustic
  couplings suitable suppressed
• using a line array to project acoustic pulse with
  the right geometry
• Simulation Signal Processing
• A lot of progress over the last year. We have
  developed new models for
• shower simulations at UHE using Korsika their
  parameterisation
• acoustic pulse shape simulations
• simulations of hydrophone response and test beam
  data
• signal processing.

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ACORNE Project Status

• RONA Data Recording
• Delayed for several months due to an MoD upgrade
  of the hydrophone array (although we will benefit
  from this).
• Recording equipment being installed this month.
  Due to the delay we upgraded the specs
• We will record 8 hydrophones simultaneously.
• We will be able to record constantly by
  physically switching TB raid arrays once per
  month.
• First data in a matter of weeks.
• The analysis of RONA data is what we are
  concentrating on here at UCL.
• Will have a copy of the data at UCL.
• Simon in developing high level reconstruction
  algorithms ?

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Long Term Strategy

• At the end of ACORNE we will have quantified the
  promise of acoustic detection.
• During that time, decide which direction to go
  in, in terms of next generation multi-detection
  technique (OAR) arrays - e.g. ICE3

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• ARENA workshops are helping to define the
  parameters of this future multi-km3 detector.
• The next in the series is being hosted in the UK,
  with ACORNE the local organising committee.
• These workshops are extremely interesting and
  attract the global leaders in this field.
• Come and learn more in June !