IRIM: an imaging magnetograph for high-resoultion solar observations in the near-infrared

Carsten J. Denker; J. Ma; Jingshan Wang; Leonid V. Didkovsky; John R. Varsik; Haimin Wang; Philip R. Goode

doi:10.1117/12.460294

11 February 2003 IRIM: An Imaging Magnetograph for High-Resoultion Solar Observations in the Near-Infrared

Carsten J. Denker, J. Ma, Jingshan Wang, Leonid V. Didkovsky, John R. Varsik, Haimin Wang, Philip R. Goode

Proceedings Volume 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics; (2003) https://doi.org/10.1117/12.460294
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The InfraRed Imaging Magnetograph (IRIM) is an innovative magnetograph system for near-infrared (NIR)observations of the Sun. IRIM will provide high spatial resolution (0.2" per pixel image scale), high temporal resolution (1-2 minutes), moderate spectral resolution (14.0 pm), and high magnetic sensitivity covering a substantial field-of-view (FOV: 170" circular). The bandpass of the instrument is reduced in three steps while still providing high transmission: (1) a 4 nm interference filter, (2) a 0.25 nm Lyot-filter, and (3) a 14.0 pm tunable Fabry-Perot etalon. The innovative NIR Lyot-filter was developed at the New Jersey Institute of Technology (NJIT) and is currently being assembled at Cambridge Research Instruments. It is the first of its kind and provides a large angle of acceptance, thus solving many problems encountered with dual Fabry-Perot systems. The two-dimensional line profiles will be recorded by a 1024 × 1024 pixel, 12-bit Complex Metal Oxide Semiconductor (CMOS) focal plane array (FPA) manufactured by Rockwell Scientific Imaging, which can obtain images at a rate of 50 fps. IRIM will utilize the remodelled Coude-feed of the 65 cm vacuum telescope at the Big Bear Solar Observatory (BBSO) and will benefit from an image stabilization and correction system of independently operating Correlation Tracking (CT) and Adaptive Optics (AO) systems.

Citation Download Citation

Carsten J. Denker, J. Ma, Jingshan Wang, Leonid V. Didkovsky, John R. Varsik, Haimin Wang, and Philip R. Goode "IRIM: An Imaging Magnetograph for High-Resoultion Solar Observations in the Near-Infrared", Proc. SPIE 4853, Innovative Telescopes and Instrumentation for Solar Astrophysics, (11 February 2003); https://doi.org/10.1117/12.460294

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