We have constructed an instrument to measure the polarization of light emitted by the solar corona in order to constrain the strength and orientation of coronal magnetic fields. We call this instrument the Coronal Multichannel Polarimeter (CoMP). The CoMP is integrated into the Coronal One Shot coronagraph at Sacramento Peak Observatory and employs a combination birefringent filter and polarimeter to form images in two wavelengths simultaneously over a 2.8R ⊙ field of view. The CoMP measures the complete polarization state at the 1074.7 and 1079.8 Fe xiii coronal emission lines, and the 1083.0 nm He i chromospheric line. In this paper we present design drivers for the instrument, provide a detailed description of the instrument, describe the calibration methodology, and present some sample data along with estimates of the uncertainty of the measured magnetic field.
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机译：为了限制日冕磁场的强度和方向，我们构造了一种测量太阳日冕发出的光的偏振的仪器。我们将此仪器称为冠状多通道旋光仪（CoMP）。 CoMP被集成到萨克拉曼多山顶天文台的日冕一发式日冕仪中，并采用双折射滤光片和偏振计的组合在2.8R ⊙视场上同时形成两个波长的图像。 CoMP测量在1074.7和1079.8 Fe xiii日冕发射线和1083.0 nm He i色球线上的完全极化状态。在本文中，我们介绍了该仪器的设计驱动程序，提供了该仪器的详细说明，描述了校准方法，并提供了一些样本数据以及对测量磁场不确定性的估计。
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