scholarly journals X‐Ray Modeling of Very Young Early‐Type Stars in the Orion Trapezium: Signatures of Magnetically Confined Plasmas and Evolutionary Implications

2003 ◽  
Vol 595 (1) ◽  
pp. 365-383 ◽  
Author(s):  
N. S. Schulz ◽  
C. Canizares ◽  
D. Huenemoerder ◽  
K. Tibbets
Keyword(s):  
Early Type ◽  
X Ray ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Early Type Stars ◽  
Orion Trapezium ◽  
Magnetically Confined Plasmas

Calibration of space-resolving VUV and soft X-ray spectrographs for plasma diagnostics

1998 ◽  
Vol 5 (3) ◽  
pp. 762-765 ◽  
Author(s):  
Masayuki Yoshikawa ◽  
Naohiro Yamaguchi ◽  
Tatsuya Aota ◽  
Katsunori Ikeda ◽  
Yuuji Okamoto ◽  
...  
Keyword(s):  
Vacuum Ultraviolet ◽  
High Energy ◽  
X Ray ◽  
Confined Plasmas ◽  
High Energy Accelerator ◽  
Magnetically Confined ◽  
Flat Field ◽  
Important Means ◽  
Magnetically Confined Plasmas ◽  
Aberration Corrected

Vacuum ultraviolet (VUV) and soft X-ray measurements are important means of diagnosing impurities in magnetically confined plasmas used in fusion research. Recently, space- and time-resolving flat-field VUV (150–1050 Å) and soft X-ray (20–350 Å) spectrographs have been constructed by using aberration-corrected concave gratings with varied-spacing grooves which give a wide simultaneous spectral coverage on a microchannel-plate intensified detector. Calibration experiments have been performed at beamlines 11A and 11C at the Photon Factory of the High Energy Accelerator Research Organization. The relative efficiency of the VUV spectrograph has been measured for P-polarization geometry in the spectrograph. In the soft X-ray spectrograph, efficiencies have been obtained for several different points of irradiation on the grating along the groove direction and for two (S and P) polarization geometries.

scholarly journals Chemical Abundances of Early Type Stars

1998 ◽  
Vol 188 ◽  
pp. 224-225
Author(s):  
S. Tanaka ◽  
S. Kitamoto ◽  
T. Suzuki ◽  
K. Torii ◽  
M.F. Corcoran ◽  
...  
Keyword(s):  
Surface Layer ◽  
Stellar Wind ◽  
Nuclear Reactions ◽  
X Rays ◽  
Early Type ◽  
Chemical Abundances ◽  
X Ray ◽  
Low Metallicity ◽  
Early Type Stars

X-rays from early-type stars are emitted by the corona or the stellar wind. The materials in the surface layer of early-type stars are not contaminated by nuclear reactions in the stellar inside. Therefore, abundance study of the early-type stars provides us an information of the abundances of the original gas. However, the X-ray observations indicate low-metallicity, which is about 0.3 times of cosmic abundances. This fact raises the problem on the cosmic abundances.

X‐Ray Emission from Early‐Type Stars in the Orion Nebula Cluster

2005 ◽  
Vol 160 (2) ◽  
pp. 557-581 ◽  
Author(s):  
B. Stelzer ◽  
E. Flaccomio ◽  
T. Montmerle ◽  
G. Micela ◽  
S. Sciortino ◽  
...  
Keyword(s):  
Orion Nebula ◽  
Early Type ◽  
X Ray ◽  
Early Type Stars

scholarly journals The field line map approach for simulations of magnetically confined plasmas

2016 ◽  
Vol 198 ◽  
pp. 139-153 ◽  
Author(s):  
Andreas Stegmeir ◽  
David Coster ◽  
Omar Maj ◽  
Klaus Hallatschek ◽  
Karl Lackner
Keyword(s):  
Field Line ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas ◽  
Map Approach

scholarly journals Turbulent transport across shear layers in magnetically confined plasmas

2014 ◽  
Vol 21 (10) ◽  
pp. 102304 ◽  
Author(s):  
B. Nold ◽  
P. Manz ◽  
T. T. Ribeiro ◽  
G. Fuchert ◽  
G. Birkenmeier ◽  
...  
Keyword(s):  
Turbulent Transport ◽  
Shear Layers ◽  
Confined Plasmas ◽  
Magnetically Confined ◽  
Magnetically Confined Plasmas
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