PC-based Grating Control System for the Horizontal Spectrogram of the Domeless Solar Telescope

September 30, 2020Technical Reports from Astronomical Observatory Graduate School of Science Kyoto UniversityOpen Access

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Key Points

To develop an automated diffraction grating control system for the horizontal spectrometer of a dome-less solar telescope.
Developed a hardware module consisting of digital IO, photo-coupler circuits, and terminal blocks.
Created software libraries for digital IO signal transmission and IDL procedures for controlling the telescope.
Implemented a system to input grating number and wavelength from the observation PC to drive the diffraction grating angle.
Achieved wavelength accuracy primarily determined by the diffraction grating angle command resolution of 1 arc minute.
Obtained a measurement precision of approximately 8x (diffraction order) Å for the three diffraction gratings.
Presented a solar spectrum atlas acquired using the horizontal spectrometer.

Develops a PC-based control system to enhance spectroscopy in solar observations, suggesting improved accuracy.

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川手 et al. (2020) studied this question.

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