HR: 1330h
AN: SH13C-13    [Abstracts]
TI: A Calcium-Based Magneto-Optical Filter
AU: * Rodgers, W
EM: wayner@eddyco.com
AF: Eddy Company , 13590 Niabi Street , Apple Valley, CA 92308 United States
AU: Murphy, N
EM: neil.murphy@jpl.nasa.gov
AF: Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Jefferies, S M
EM: stuartj@msrc.unm.edu
AF: Maui Scientific Research Center, University of New Mexico, 590 Lipoa Parkway, Ste 262, Kihei, HI 96753 United States
AB: The magneto-optical filter, MOF [1], has been used for imaged Doppler and magnetic field observations of the Sun for nearly three decades. The strengths of the MOF lie in its wavelength stability, its narrow pass-band (approx. 0.005nm) and high throughput. Until recently, its main limitation has been that it has only been available for use with the Na I (sodium) and K I (potassium) D-lines. We will discuss some developments in the technology for building the vapor cells for the MOF and will show preliminary results for a calcium-based MOF. The Ca I line at 422nm is formed in the mid-chromosphere and can thus provide a probe for velocity and magnetic field information for this region. [1] Cacciani and Fofi, Solar Phys. 59, 1978
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7507 Chromosphere
DE: 7522 Helioseismology
DE: 7524 Magnetic fields
DE: 7594 Instruments and techniques
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly