HR: 09:00h
AN: SH31B-04    [Abstracts]
TI: Magnetic Field Measurements from The Coronal Multi-Channel Polarimeter
AU: * Tomczyk, S
EM: tomczyk@ucar.edu
AF: HAO/NCAR , P.O. Box 3000 , Boulder, CO 80307 United States
AB: We have constrcted a filter-based polarimeter optimized for the measurement of magnetic fileds in the solar corona. The instrument will observe the coronal emission lines of FeXIII at 1074.7 and 1079.8 nm as well as the chromospheric HeI emission line at 1083 nm. The instrument consists of a polarimeter allowing complete Stokes I,Q,U,V measurement followed by a Lyot birefringent filter with dual passbands of 0.14 nm width. Both the polarimeter and filter employ liquid crystals for rapid electro-optical tuning. Measurement of the longitudinal Zeeman effect provides information on the strength of the line-of-sight component of the magnetic field while the observation of resonance scattering will constrain the plane-of-sky field direction. Precise measurement of plasma velocity is also possible. Such measurements are critical for addressing many outstanding problems in coronal physics. This instrument was deployed to the 20-cm One Shot coronagraph at NSO's Sacramento Peak Observatory in January of 2004. Observations were obtained during observing runs in March, May and August of 2004. Results from these observing runs will be presented.
DE: 7509 Corona
DE: 7594 Instruments and techniques
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2004 AGU Fall Meeting