WALTA school-network cosmic ray detectors

R. Jeffrey Wilkes, Hans Gerd Berns, T. H. Burnett, Richard Gran

Research output: Contribution to journalConference articlepeer-review


The Washington Area Large-scale Time coincidence Array (WALTA) is placing particle detector arrays in secondary schools in the Seattle area to build up a large-scale ultra-high energy cosmic ray detector network, one of several such projects around the world. Scintillation counters salvaged from the CASA experiment in cooperation with the CROP group at the University of Nebraska at Lincoln are refurbished by teachers and students, tested, calibrated, and installed in four-fold arrays at high school sites. To identify time coincidences, a GPS time synchronization system is employed. Data are acquired using a custom low-cost DAQ card. Here we will describe the logistics and status of WALTA and show samples of data taken with a prototype array at the University of Washington.

Original languageEnglish (US)
Article numberN26-87
Pages (from-to)801-803
Number of pages3
JournalIEEE Nuclear Science Symposium Conference Record
StatePublished - 2003
Event2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference - Portland, OR, United States
Duration: Oct 19 2003Oct 25 2003


  • Air Showers
  • Cosmic Rays
  • Secondary Schools


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