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arXiv 1010.2841astro-ph.IM
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使用South Pole声学测试装置进行声学瞬态事件重建和灵敏度研究

Acoustic transient event reconstruction and sensitivity studies with the South Pole Acoustic Test Setup

Jens Berdermann

摘要:

南极声学测试装置(SPATS)由四根弦组成,每根弦上装有七个声学传感器和发射器,部署在IceCube孔的上部500米处。自2008年8月底以来,SPATS以瞬态模式运行,其中每个串的三个传感器通道位于三个不同的深度,用于在10至100 kHz频率范围内采集触发数据。这允许以高精度重建声学信号源在南极冰中的位置。识别来自重新冻结IceCube孔的声学信号。所有探测到的声学事件都与南极人类活动造成的源有关。此外,已通过模拟确定了IceCube仪器区以外的中微子相互作用的敏感体积,并推导出高能中微子的通量极限。

英文摘要:

The South Pole Acoustic Test Setup (SPATS) consists of four strings instrumented with seven acoustic sensors and transmitters each, which are deployed in the upper 500 m of the IceCube holes. Since end of August 2008 SPATS is operating in transient mode, where three sensor channels of each string, located at three different depth levels, are used for triggered data taking within the 10 to 100 kHz frequency range. This allows to reconstruct the position of the source of acoustic signals in the antarctic ice with high precision. Acoustic signals from re-freezing IceCube holes are identified. All detected acoustic events seen are associated to sources caused by human activities at the South Pole. Further, the sensitive volume for neutrino interactions outside the IceCube instrumented area has been determined by simulation and a flux limit for high energy neutrinos was derived.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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