Research and calibration of acoustic sensors in ice within the SPATS (South Pole Acoustic Test Setup) project
We present development work aiming towards a large scale ice-based hybrid detector including acoustic sensors for the detection of neutrinos in the GZK range. A facility for characterization and calibration of acoustic sensors in clear (bubble-free) ice has been developed and the first measurements done at this facility are presented. Further, a resonant sensor intended primarily for characterization of the ambient noise in the ice at the South Pole has been developed and some data from its performance are given. (C) 2010 Elsevier B.V. All rights reserved.