The Haleakala Stokes polarimeter

Details The Haleakala Stokes polarimeter The Haleakala Stokes polarimeter

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...97..223m&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 97, June 1985, p. 223-238.

Physics

Optics

97

Polarimeters, Solar Instruments, Solar Spectra, Stokes Law Of Radiation, Computer Techniques, Fiber Optics, Instrument Errors, Modulators, Optical Coupling, Optical Fibers, Solar Spectrometers

Scientific paper

A versatile Stokes polarimeter for solar observations has been developed at the University of Hawaii. Recent improvements to the instrument include a high-resolution echelle spectrometer coupled to the telescope by optical fibers, and 128-element diode array detectors. The on-axis design of the telescope and polarimeter limit instrumental polarization to 10-4, and the spectrometer detector combination provides spectral resolving power of 160,000 for any wavelength between 4000 and 11,000 Å. This paper describes the Haleakala polarimeter and in particular the spectrometer with its fiber-optic coupling. Examples of Stokes line profiles observed in a sunspot are presented, together with derived vector magnetic field maps.

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