Transient Waveform Recorder System 

Data Acquisition System Documentation

Summer Season
(Dec 2001 ~ Feb 2002)

Pole Team
  • Wolfgang Wagner 
  • Thomas Feser 
  • Yuan Yan 
  • Steve Barwick 

The Transient Waveform Recorder System is designed to extend the integrated dynamic range by approximately a factor of 100, relative to the standard AMANDA DAQ. 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. The goal is to assess the performance and reliability. If the results are encouraging, the plan is to extend the system to all channels. (Since the new capabilities are so advanced, maybe the new configuration with all channels connected to TWR should be changed to  "AMANDA-XE" (for eXtreme Energy), the successor of AMANDA-II ;-)

The following links show figures of  the electrical and computer connections for the Transient Waveform Recorder DAQ at the end of the Feb 2002 summer campaign. The prototype system was installed in Jan. 2002. The electrical waveforms were taken from the spare fast output of the ORM/ORB. All TWR channels are connected to fiber optic channels. The Laser Diode dAOMs are connected to an ORM with only one fast out. Therefore, to keep these channels in the muon DAQ, we inserted a linear fan out (linear to -3V, Vout/Vin ~ 0.85, AC coupled with 6us decay time).

The following documentation is available on this page:

  1. TWR daq manual in postscript format and in pdf format (by Wolfgang Wagner)
  2. TWR data flow at south pole (by Thomas Feser)
  3. TWR - system layout as a block diagram (by Wolfgang Wagner)
  4. TWR / muon - DAQ trigger connection (by Wolfgang Wagner)
  5. wavemerger documentation (by Thomas Feser)
  6. TWR module documentation (by Struck company)
  7. GPS latch documentation (by Holger Leich)
  8. MBS system introduction (by GSI)
  9. our current (!) list of selected optical modules connected to TWR system an our cable map
  10. A first TWR Analysis and a Method for TWR Time Calibration Talk given at Zeuthen October 2002 (by Andrea Silvestri)
The following downloads are available (all are un'tar'ed by giving the >> tar xfvz << command) :
  1. wavemerger gzipped tar archive version 1.0
  2. waveviewer gzipped tar archive in an early development state (but working)
  3. wavehisto gzipped tar arvive in an even earlier development state (use with care!!!)
The TWR VME Crate
The VME Crate

Some general info (Jan 2002)

First Look Assessment of Technical Performance
Technical information can be found in the TWR daq manual  in postscript format written by W. Wagner.   In addition, History of progress of TWR DAQ Last updated: February 11, 2002