Polarimetry is a crucial method to investigate solar magnetic fields. From the viewpoint of space weather, the magnetic field in solar filaments, which occasionally erupt and develop into interplanetary flux ropes, is of particular interest. To measure the magnetic field in filaments, high-performance polarimetry in the near-infrared wavelengths employing a high-speed, large-format detector is required; however, so far, this has been difficult to be realized. Thus, the development of a new infrared camera for advanced solar polarimetry has been started, employing a HAWAII-2RG (H2RG) array by Teledyne, which has $$2048~\times 2048$$ 2048 × 2048 pixels, focusing on the wavelengths in the range of $$1.0\;{-}\;1.6\;~\mu {\text{m}} $$ 1.0 - 1.6 μ m . We solved the problem of the difficult operation of the H2RGs under “fast readout mode” synchronizing with high-speed polarization modulation by introducing a “MACIE” (Markury ASIC Control and Interface Electronics) interface card and new assembly codes provided by Markury Scientific. This enables polarization measurements with high frame-rates, such as 29–117 frames per seconds, using a H2RG. We conducted experimental observations of the Sun and confirmed the high polarimetric performance of the camera.

中文翻译：

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HAWAII-2RG 红外热像仪在快速读取模式下运行，用于太阳偏振测量

旋光法是研究太阳磁场的重要方法。从太空天气的角度来看，偶尔爆发并发展成行星际通量绳的太阳灯丝中的磁场特别令人感兴趣。为了测量灯丝中的磁场，需要使用高速大尺寸探测器在近红外波长中进行高性能极化；然而，到目前为止，这很难实现。因此，已经开始开发用于先进太阳偏振测量的新型红外相机，采用 Teledyne 的 HAWAII-2RG (H2RG) 阵列，具有 $$2048~\times 2048$$2048 × 2048 像素，专注于$$1.0\;{-}\;1.6\;~\mu {\text{m}} $$ 1.0 - 1.6 μ m 的范围。我们通过引入“MACIE”（Markury ASIC Control and Interface Electronics）接口卡和Markury Scientific提供的新汇编代码，解决了H2RG在与高速偏振调制同步的“快速读出模式”下难以操作的问题。这可以使用 H2RG 以高帧速率（例如每秒 29-117 帧）进行极化测量。我们对太阳进行了实验观测，并证实了相机的高偏振性能。