Slitless Solar Spectroscopy

Kamalabadi, Farzad
Öktem, Sevinç Figen
Davila, Joseph M


Slitless solar spectroscopy
Oneill, John; Davila, Joseph M; Öktem, Sevinç Figen (null; 2014-06-05)
Spectrographs have traditionally suffered from the inability to obtain line intensities, widths, and Doppler shifts over large spatial regions of the Sun quickly because of their narrow instantaneous field of view. This has limited the spectroscopic analysis of rapidly varying solar features like, flares, CME eruptions, coronal jets, and reconnection regions. Imagers, on the other hand, have provided high time resolution images of the full Sun with limited spectral resolution.In this paper we present recent...
Slitless Solar Imaging Spectroscopy
Davila, Joseph M.; Öktem, Sevinç Figen; Kamalabadi, Farzad (American Astronomical Society, 2019-09-20)
Spectrometers provide our most detailed diagnostics of the solar coronal plasma, and spectral data is routinely used to measure the temperature, density, and flow velocity in coronal features. However, spectrographs suffer from a limited instantaneous field of view (IFOV). Conversely, imaging instruments can provide a relatively large IFOV, but extreme-ultraviolet (EUV) multilayer imaging offers very limited spectral resolution. In this paper, we suggest an instrument concept that combines the large IFOV of...
Dimensionless parameter approach for oxygen delignification kinetics
Dogan, Ismail; Gueruez, Gueniz (American Chemical Society (ACS), 2008-08-20)
In this study, the kinetic analysis of oxygen delignification of Turkish southern hardwood Kraft pulp was carried out. The kinetic rate data were collected in a high pressure batch reactor at industrially significant conditions of temperature, alkali charge, and oxygen partial pressure. The mass transfer effects were examined for the system studied. After eliminating the mass transfer resistances in the delignification system, the kinetics of oxygen delignification was studied and the governing rate equatio...
Grain refinement of al-si-mg cast alloys with niobium – boron addition
Aldoğan, Enver Burak; Kalkanlı, Ali; Department of Metallurgical and Materials Engineering (2021-2-15)
The aim of this thesis is to observe the grain refinement effect of aluminum (Al), niobium (Nb) and boron (B) alloy for silicon and magnesium-based aluminum cast alloys, especially A357. When the silicon content exceeds the 3 % w.t on the aluminum, silicon and magnesium-based alloy, effectiveness of Al-Ti-B grain refiner decreases due to formation of titanium silicide precipitates, called as poisoning effect. The surface of the grain refining constitues are coated with titanium silicide, and number of TiB2 ...
Dose dependence effect of thermoluminescence process in TlInS2:Nd single crystals
Kadari, Ahmed; Delice, Serdar; Hasanlı, Nızamı (2017-01-01)
In this paper, thermoluminescence (TL) properties of TlInS2:Nd single crystals were modeled using an interactive model (one trap and one kind of recombination center). The simulated work presented here was based on the experiment conducted by Delice et al. The thermoluminescence glow curve of TlInS2:Nd single crystals has been characterized by one main peak at 26 K, which confirm the presence of one active electron trap level in the forbidden band of this material. The model used in this work is similar to ...
Citation Formats
F. Kamalabadi, S. F. Öktem, and J. M. Davila, “Slitless Solar Spectroscopy,” 2014, Accessed: 00, 2021. [Online]. Available: