منابع مشابه
Coronal Magnetic Field Measurements
A long-standing solar problem has been to measure the coronal magnetic field. We believe it determines the coronal structure and dynamics from the upper chromosphere out into the heliospheric environment. It is only recently that Zeeman splitting observations of infrared coronal emission lines have been successfully used to deduce the coronal magnetic flux density. Here we extend this technique...
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This article reviews the use of gyroresonance emission at radio wavelengths to measure coronal magnetic fields. The spiralling motion of electrons in the 200– 2000 G fields in the solar corona produces sufficient opacity to render the corona optically thick, making it easy to recognize such sources in microwave images from their coronal brightness temperatures. Where gyroresonance sources are p...
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The paper i l l u s t r a t e s the most recent techniques i n the f i e l d o f l a rge-sca le magnetic measurements. The main problems r e l a t e d t o f i e l d mapping a re discussed. The development o f microelect ron ics dur ing the l a s t few years has created a r e v o l u t i o n i n magnetic measurement systems. Modular hardware and software as we l l as widely used i n d u s t r i ...
متن کاملMagnetic field measurements using very sensitive SQUIDs
SQUID systems, using either high temperature or low temperature superconductors, were developed for sensitive measurements in magnetically disturbed environments. They include the SQUIDs and fast SQUID electronics. Magnetometer SQUID systems are used for geophysical sounding, where they show superiority when compared to conventional induction coils for very deep sounding or fast measurement. Hi...
متن کاملThe Solar Coronal Magnetic Field Measurements With SOLARC
Direct solar coronal magnetic field measurements have become possible since recent development of high-sensitivity infrared detection technology. The SOLARC instrument installed on Mt. Haleakala is such a polarimetric coronagraph that was designed for routinely observing Stokes parameter profiles in near infrared (NIR) wavelengthes. The Fe 1075 nm forbidden coronal emission line (CEL) is potent...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20053295