The Wide-Field Imager for Solar Probe Plus (WISPR)
The Wide-Field Imager for Solar Probe Plus (WISPR)
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DOI：
10.1007/s11214-014-0114-y
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发表时间：
2014-12
影响因子：
10.3
通讯作者：
A. Vourlidas;R. Howard;S. Plunkett;C. Korendyke;A. Thernisien;D. Wang;N. Rich;M. T. Carter
中科院分区：
文献类型：
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作者：
A. Vourlidas;R. Howard;S. Plunkett;C. Korendyke;A. Thernisien;D. Wang;N. Rich;M. T. Carter
Solar Probe Plus（WISPR）的宽视场成像仪是计划于2018年发射的Solar Probe Plus（SPP）使命上的唯一成像仪。SPP将是一个独特的使命，设计轨道接近700万公里（9.86太阳半径），从太阳中心。WISPR采用95厘米径向58厘米横向视场来拍摄日冕的精细结构，导出大尺度日冕的3D结构，并确定太阳附近是否存在无尘区。WISPR是迄今为止最小的日光层成像仪，但它包括两个嵌套的宽视场望远镜，带有大格式（2 K × 2 K）APS CMOS探测器，以优化其各自视场的性能，并最大限度地减少灰尘损害的风险，这可能相当接近太阳。WISPR的电子设备非常灵活，可以在近日点以1秒的频率收集单个图像，或者在航天器远离太阳时将多个图像相加，以增加信噪比。汤姆逊散射发射的日冕上的成像几何形状的依赖性，决定了WISPR将是非常敏感的发射等离子体接近航天器的情况下，从地球轨道成像。WISPR将是第一个“本地”成像仪，为大规模日冕和原位测量提供重要联系。
The Wide-field Imager for Solar PRobe Plus (WISPR) is the sole imager aboard the Solar Probe Plus (SPP) mission scheduled for launch in 2018. SPP will be a unique mission designed to orbit as close as 7 million km (9.86 solar radii) from Sun center. WISPR employs a 95∘radial by 58∘transverse field of view to image the fine-scale structure of the solar corona, derive the 3D structure of the large-scale corona, and determine whether a dust-free zone exists near the Sun. WISPR is the smallest heliospheric imager to date yet it comprises two nested wide-field telescopes with large-format (2 K × 2 K) APS CMOS detectors to optimize the performance for their respective fields of view and to minimize the risk of dust damage, which may be considerable close to the Sun. The WISPR electronics are very flexible allowing the collection of individual images at cadences up to 1 second at perihelion or the summing of multiple images to increase the signal-to-noise when the spacecraft is further from the Sun. The dependency of the Thomson scattering emission of the corona on the imaging geometry dictates that WISPR will be very sensitive to the emission from plasma close to the spacecraft in contrast to the situation for imaging from Earth orbit. WISPR will be the first ‘local’ imager providing a crucial link between the large-scale corona and thein-situmeasurements.