论文标题
伽马射线太空仪器的轨道和背景
Orbits and background of gamma-ray space instruments
论文作者
论文摘要
空间中的伽马射线望远镜被大量的带电颗粒，光子和次级中子轰击。这些颗粒和辐射对卫星的标称操作构成威胁，并限制了伽马射线仪器的检测灵敏度。通过撞击颗粒而产生的背景噪声总是比要检测到的天体物理信号高得多。在本章中，我们介绍了适合伽马射线任务的不同类型的轨道，讨论了它们的优势和缺点，以及在平流层气球中发挥的实验的价值。然后，我们回顾不同轨道和平流层中所有背景成分的物理特性。
Gamma-ray telescopes in space are bombarded by large fluxes of charged particles, photons and secondary neutrons. These particles and radiation pose a threat to the nominal operation of satellites and limit the detection sensitivity of gamma-ray instruments. The background noise generated in gamma-ray space detectors by impinging particles is always much higher than the astrophysical signal to be detected. In this chapter, we present the different types of orbits suitable for gamma-ray missions, discussing their advantages and disadvantages, as well as the value of experiments embarked in stratospheric balloons. We then review the physical properties of all the background components in the different orbits and the stratosphere.
