AMANDA TWR (Transient Waveform Recorders) DAQ 2002/2003

•         The AMANDA TWR (Transient Waveform Recorders) DAQ Photo

  
  THE 2 RACKS WITH 6 VME CRATES CONTAINING 72 TWR MODULES
  
  

  Quickguide for Operations

  System Overview

  Technical Performance of the TWR System

  Hardware Manuals and Documentation: (Cable Maps, Channel Maps, Offset Times, Thresholds, etc)

  Software Manuals and Documentation: (Waveform Visualization, Merging Programs, Filtering, Raw Data Reader, Merged Data Reader, etc.)

  Older References

  First TWR Waveforms

  
  
  
  The Transient Waveform Recorder System (TWR) is designed to extend the integrated dynamic range of each OM in AMANDA-II by approximately a factor of 100, relative to the standard AMANDA DAQ. The TWR system can handle the normal muon trigger rates with virtually no dead time. The "discriminator" thresholds for each channel can be set to values significantly lower than 50mV, the lowest operational values available in the DMAD. This too helps to improve performance by making 1 pe detection more efficient. The added capability should improve the energy resolution and background rejection for high energy phenomena, including the search for EHE nu's in the downgoing direction, the search for high energy cascades, and GRBs. It should also help to improve the angular resolution of higher energy muons (muons that cross the array with an excess of 100 TeV). The TWR DAQ suppresses waveforms with OM signals and extracts waveform "features" for additional compression.
  • 576 OM channels (nearly all usable channels)
  • 6 VME crate
  • M=24 trigger from DMAD (no string, no SPASE)
  • Trigger rate ~ 80 Hz, no dead time
  • Data rate - 50GB/day uncompressed, 25 GB/day with bzip2
  • TWR data archived to SDLTs
  • M=80 merged data sent via satellite (1 GB/day)
  • Pre-scaled M=24 merged data sent via satellite
  
   
   
   
   
   
   
   
   
  Steve Barwick 
  Last modified: Feb 13 2003