arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0903.2398astro-ph.IMastro-ph.HE
收藏

使用LOFAR进行空气簇射测量

Air Shower Measurements with LOFAR

A. Horneffer, L. Bähren, S. Buitink, H. Falcke, J. R. Hörandel, J. Kuijpers, S. Lafebre, A. Nigl, O. Scholten, K. Singh

摘要:

来自宇宙射线的空气簇射发射出短而强的无线电脉冲。LOFAR是一种新的射电望远镜,正在荷兰和欧洲建造。LOFAR主要设计为无线电干涉仪,其核心将拥有高密度的无线电天线,这些天线将得到非常好的校准。这使得LOFAR成为研究单个空气簇射的无线电特性的独特工具。触发来自空气簇射的无线电发射意味着检测短无线电脉冲并将真实事件与无线电干扰区分开来。在LOFAR,我们计划在数字数据流中搜索脉冲--无论是来自单个天线还是来自已经波束形成的数据--并计算表征脉冲形状的几个参数,以在第二阶段中挑选出真实的事件。此外,我们将有一个小型闪烁体阵列来测试和确认无线电触发器的性能。

英文摘要:

Air showers from cosmic rays emit short, intense radio pulses. LOFAR is a new radio telescope, that is being built in the Netherlands and Europe. Designed primarily as a radio interferometer, the core of LOFAR will have a high density of radio antennas, which will be extremely well calibrated. This makes LOFAR a unique tool for the study of the radio properties of single air showers. Triggering on the radio emission from air showers means detecting a short radio pulse and discriminating real events from radio interference. At LOFAR we plan to search for pulses in the digital data stream - either from single antennas or from already beam-formed data - and calculate several parameters characterizing the pulse shape to pick out real events in a second stage. In addition, we will have a small scintillator array to test and confirm the performance of the radio only trigger.

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。

↑