近地轨道太阳轴子到X射线地磁转换测量的可行性研究
Feasibility Study for Measuring Geomagnetic Conversion of Solar Axions to X-rays in Low Earth Orbits
摘要：
我们提出了一个详细的计算的预期率的太阳轴子的地磁转换为X射线（GECOSAX）沿轨道的X射线卫星。我们使用真实的卫星轨道和传播时间。一个现实的地球磁场，它正确地占其空间不均匀性模型，使用。我们还考虑了地球大气对X射线传播的影响，计算了轴子-光子转换概率。为了估计轴子-光子耦合g_{aγ}可能的灵敏度，我们使用SUZAKU卫星对预期背景的实际测量。假设探测器面积为10^3 cm ^2，数据约为10^6 s，我们证明，对于质量m_a<10^{-4} eV的轴子，从GECOSAX得到的2 σ极限g_{aγ} <（4.7-6.6）乘以10 ^{-11} GeV^{-1}是可以实现的。这显著超过了当前实验室对g_{aγ}的敏感性。
英文摘要：
We present a detailed computation of the expected rate for Geomagnetic Conversion of Solar Axions to X-rays (GECOSAX) along the orbit of an x-ray satellite. We use realistic satellite orbits and propagation in time. A realistic model for the Earth's magnetic field, which properly accounts for its spatial non-uniformity, is used. We also account for the effect of the Earth's atmosphere on the propagation of x-rays in our calculation of axion-photon conversion probability. To estimate possible sensitivities to the axion-photon coupling g_{aγ}, we use an actual measurement of the expected backgrounds by the SUZAKU satellite. Assuming a detector area of 10^3 cm^2 and about 10^6 s of data, we show that a 2 σlimit of g_{aγ} < (4.7-6.6) times 10^{-11} GeV^{-1} from GECOSAX is achievable, for axion masses m_a<10^{-4} eV. This significantly exceeds current laboratory sensitivities to g_{aγ}.
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