Development of SCIDAR for solar observations
Development of SCIDAR for solar observations
复制标题
用于太阳观测的 SCIDAR 的开发
DOI：
10.1117/12.504232
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
T. Rimmele
中科院分区：
文献类型：
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作者：
J. Beckers;T. Rimmele
在夜间天文学中，Vernin及其同事提出并随后开发了所谓的SCIDAR（闪烁探测和测距）技术来探测Cn 2（h）。它利用双阴影带（或闪烁）图案形成的望远镜孔径的两个组成部分的一个双星星。我们正在开发这种技术的变体用于太阳天文学。它在太阳图像上使用直径小于等晕斑的成对小孔径（“人造双星”）。在等晕斑内，大气波前扰动的复振幅（强度和相位）是恒定的。Solar SCIDAR（或S-SCIDAR）利用了这一点。我们将提出的第一个（非决定性的）实验的结果，这种S-SCIDAR技术上使用的76厘米口径邓恩太阳望远镜（DST）和152厘米口径的McMath-Pierce设施（McM-P）的美国国家太阳天文台。它使用一个45 x 45的小透镜阵列放置在太阳图像中。小透镜的大小在DST上为2.25 x 2.25弧秒，在McM-P上为1.67 x 1.67弧秒; DST上小透镜对的间距（以及人造双星的间距）从2.25弧秒到140弧秒不等。小透镜阵列在CCD检测器上形成光瞳图像阵列。
In nighttime astronomy Vernin and co-workers have proposed and subsequently developed the so-called SCIDAR (SCIntillation Detection And Ranging) technique to probe Cn2(h). It makes use of the double shadow band (or scintillation) pattern formed on a telescope aperture by the two components of a binary star. We are developing a variant of this technique for solar astronomy. It uses pairs of small apertures on the solar image with diameters smaller than the isoplanatic patch (“artificial double stars”). Within the isoplanatic patch the complex amplitude (intensity and phase) of the atmospheric wavefront disturbances is constant. Solar SCIDAR (or S-SCIDAR) makes use of this. We will present the results of the first (inconclusive) experiments of this S-SCIDAR technique as used on the 76 cm aperture Dunn Solar Telescope (DST) and the 152 cm aperture McMath-Pierce facility (McM-P) of the US National Solar Observatory. It uses a 45 x 45 lenslet array placed in the solar image. The size of the lenslets corresponds to 2.25 x 2.25 arcsec at the DST and 1.67 x 1.67 arcsec at the McM-P; the separation of lenslet pairs on the DST (and hence of the separations of the artificial double stars) ranges from 2.25 arcsec to 140 arcsec. The lenslet array forms an array of pupil images on a CCD detector.