EUV Spectroscopy of Solar Transition Zone Plasmas

Which solar EUV indices are best for reconstructing the solar EUV irradiance ?

Zone of Transition in Seljuq Dome Chambers of Iran

Architecturally, the Seljuqs' dominion makes a significant shift from the Pre-Islamic Sassanid squinches into a sophisticated transition mechanism employed to change the walls of a square chamber to an octagonal base to set a dome which this initiated a new construction methodology to hybridize the previous experiences of Sassanid domes with new architectural tendencies since the previous under...

EUV spectroscopy on the SSPX spheromak

Extreme ultraviolet (EUV) plasma spectroscopy is one the diagnostics implemented at the Sustained Spheromak Physics Experiment (SSPX) at the Lawrence Livermore National Laboratory. A grating spectrometer covering the spectral region of 25 450 Å with a resolution of 0.3 Å was used as an impurity diagnostic to monitor the plasmas and to carry out atomic physics research. Several low-Z impurities ...

Radio Versus EUV/X{Ray Observations of the Solar Atmosphere

This paper 1 reviews the contrasting properties of radio and EUV/X{ray observations for the study of the solar atmosphere. The emphasis is placed on explaining the nature of radio observations to an EUV/X{ray audience. Radio emission is produced by mechanisms which are well-understood within classical physics. Bremsstrahlung tends to be dominant at low frequencies, while gyroresonance emission ...

Hinode EUV Imaging Spectrometer Observations of Solar Active Region Dynamics

The EUV Imaging Spectrometer (EIS) on the Hinode satellite is capable of measuring emission line center positions for Gaussian line profiles to a fraction of a spectral pixel, resulting in relative solar Dopplershift measurements with an accuracy of less than a km s for strong lines. We show an example of the application of that capability to an active region sit-and-stare observation in which ...