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首页> 外文会议>Proceedings of the 32nd International Cosmic Ray Conference >The Potential of Spaced-based High-Energy Neutrino Measurements via the Airshower Cherenkov Signal
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The Potential of Spaced-based High-Energy Neutrino Measurements via the Airshower Cherenkov Signal

机译：通过Airshower Cherenkov信号进行基于空间的高能中微子测量的潜力

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Future space-based experiments, such as OWL [1] and JEM-EUSO [2], view large atmospheric and terres-trialneutrino targets. With energy thresholds slightly above 1019eV for observing airshowers via air fluorescence, thepotential for observing the cosmogenic neutrino flux associated with the GZK effect is limited. However, the forwardCherenkov signal associated with the airshower can be observed at much lower energies. A simulation was developed todetermine the Cherenkov signal strength and spatial extent at low-Earth orbit for upward-moving airshowers. A modelof tau neutrino interactions in the Earth was employed to determine the event rate of interactions that yielded a tau leptonwhich would induce an upward-moving airshower observable by a space-based instrument. The effect of neutrino attenu-ationby the Earth forces the viewing of the Earth's limb to observe the u0017 -induced Cherenkov airshower signal at abovethe OWL Cherenkov energy threshold of -1016.5eV for limb-viewed events. Furthermore, the neutrino attenuation lim-itsthe effective terrestrial neutrino target area to -3 × 105km2at 1017eV, for an orbit of 1000 km and an instrumentalfull Field-of-View of 45. This translates into an observable cosmogenic neutrino event rate of 1/year based upon twodifferent models of the cosmogenic neutrino flux, assuming neutrino oscillations and a 10% duty cycle for observation.
机译：未来的太空实验，例如OWL [1]和JEM-EUSO [2]，将观察到较大的大气和地面-中微子目标。对于通过空气荧光观察空气淋浴的能量阈值略高于1019eV，用于观察与GZK效应相关的宇宙中微子通量的潜力受到限制。但是，可以在低得多的能量下观察到与空气淋浴器相关的正切伦科夫信号。开发了一种模拟方法，用于确定低空轨道上的契伦科夫信号强度和空间范围，以用于向上移动的空气淋浴器。利用地球中tau中微子相互作用的模型来确定产生tau轻子的相互作用的事件速率，该tau轻子会引起天基仪器观测到的向上移动的空气淋浴器。地球对中微子的衰减作用迫使观察地球的肢体，以在肢体观察事件的OWL Cherenkov能量阈值-1016.5eV之上观察u0017引起的Cherenkov空气淋浴信号。此外，中微子衰减将其有效地球中微子目标面积限制为1017eV时的-3×105km2，轨道为1000 km，仪器的完整视场为45。这转化为可观测的宇宙成因中微子事件发生率，为每年1。基于宇宙中微子通量的两个不同模型，假设中微子振荡和观察的占空比为10％。

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