Overview of the Solar Ultraviolet Magnetograph Investigation

Edward A. West; Jason G. Porter; John M. Davis; G. Allen Gary; Douglas M. Rabin; Roger J. Thomas; Joseph M. Davila

doi:10.1117/12.410534

18 December 2000 Overview of the Solar Ultraviolet Magnetograph Investigation

Edward A. West, Jason G. Porter, John M. Davis, G. Allen Gary, Douglas M. Rabin, Roger J. Thomas, Joseph M. Davila

Proceedings Volume 4139, Instrumentation for UV/EUV Astronomy and Solar Missions; (2000) https://doi.org/10.1117/12.410534
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

Traditional magnetographs measure the solar magnetic field at the visible 'surface' of the Sun, the photosphere. The Solar Ultraviolet Magnetograph Investigation (SUMI) is a hardware development study for an instrument to measure the solar magnetic field higher in the atmosphere, in the upper chromosphere and in the transition region at the base of the corona. The magnetic pressure at these levels is much stronger than the gas pressure (in contrast to the situation at the photosphere), so the field controls the structure and dynamics of the atmosphere. Rapid changes in the magnetic structure of the atmosphere become possible at this height, with the release of energy. Measurements of the vector magnetic field in this region will significantly improve our understanding of the physical processes heating the Sun's upper atmosphere and driving transient phenomena such as flares and coronal mass ejections. The instrument will incorporate new technologies to achieve the polarization efficiencies required to measure the magnetic splitting of lines in the VUV an UV (C_IV at 1550 angstrom and Mg_II at 2800 angstrom). We describe the scientific goals, the optical components that are being developed for a sounding rocket program, and the SUMI baseline design.

Citation Download Citation

Edward A. West, Jason G. Porter, John M. Davis, G. Allen Gary, Douglas M. Rabin, Roger J. Thomas, and Joseph M. Davila "Overview of the Solar Ultraviolet Magnetograph Investigation", Proc. SPIE 4139, Instrumentation for UV/EUV Astronomy and Solar Missions, (18 December 2000); https://doi.org/10.1117/12.410534

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