用于PicSat任务的小型轻型光纤光度计
A Compact and Lightweight Fibered Photometer for the PicSat Mission
摘要：
PicSat是一颗纳米卫星，用于观测巨行星β Picaib的凌日，预计将于2017年底发射。其科学目标是：观测巨行星希尔球的过境，探测系统中的外彗星，以及对星周盘不均匀性的精细监测。为了实现这些目标，在质量和功率预算方面不超过3单元立方体卫星的可能性，设计了一个小型但雄心勃勃的2公斤光电机械有效载荷。该仪器专门用于高精度测光，使用3.5厘米有效孔径望远镜，将光注入连接到雪崩光电二极管的单模光纤中。为了保证光纤中光注入的稳定性，使用了基于双轴压电致动系统的精细指向系统。该系统将达到亚弧秒精度，并确保可以达到至少200 ppm/hr的总体光度精度。
英文摘要：
PicSat is a nanosatellite developed to observe the transit of the giant planet beta Pictoris b, expected in late 2017. Its science objectives are: the observation of the transit of the giant planet's Hill sphere, the detection of exocomets in the system, and the fine monitoring of the circumstellar disk inhomogeneities. To answer these objectives without exceeding the possibilities of a 3-unit Cubesat in terms of mass and power budget, a small but ambitious 2 kg opto-mechanical payload was designed. The instrument, specifically made for high precision photometry, uses a 3.5 cm effective aperture telescope which injects the light in a single-mode optical fiber linked to an avalanche photodiode. To ensure the stability of the light injection in the fiber, a fine pointing system based on a two-axis piezoelectric actuation system, is used. This system will achieve a sub-arcsecond precision, and ensure that an overall photometric precision of at least 200 ppm/hr can be reached.
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。
