Design of the CHIRON high-resolution spectrometer at CTIO
Design of the CHIRON high-resolution spectrometer at CTIO
复制标题
CTIO 的 CHIRON 高分辨率光谱仪设计
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
D. Fischer
中科院分区：
文献类型：
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作者：
C. Schwab;J. Spronck;A. Tokovinin;D. Fischer
小型望远镜与高分辨率光谱仪相结合是多普勒行星搜索的有力工具。它们允许高节奏的观测和灵活的调度;然而，这样的设施很少。我们提出了一个创新的和廉价的设计CHIRON，高分辨率（R~80.000）的中阶梯光谱仪的1.5米望远镜在CTIO。性能和吞吐量非常好，在410至870 nm的整个光谱范围内，碘吸收区的峰值效率为15%。光谱仪将采用光纤馈电，并使用碘池进行波长校准。图像分割器允许适度的光束尺寸。我们使用市售的高性能光学元件，这是快速高效实施的关键。我们讨论了光学设计，光学机械公差和由此产生的图像质量。
Small telescopes coupled to high resolution spectrometers are powerful tools for Doppler planet searches. They allow for high cadence observations and flexible scheduling; yet there are few such facilities. We present an innovative and inexpensive design for CHIRON, a high resolution (R~80.000) Echelle spectrometer for the 1.5m telescope at CTIO. Performance and throughput are very good, over the whole spectral range from 410 to 870nm, with a peak efficiency of 15% in the iodine absorption region. The spectrograph will be fibre-fed, and use an iodine cell for wavelength calibration. An image slicer permits a moderate beam size. We use commercially available, high performance optical components, which is key for quick and efficient implementation. We discuss the optical design, opto-mechanical tolerances and resulting image quality.