scholarly journals A brief review of the intensity of lines 3C and 3D in neon-like Fe XVII

2008 ◽  
Vol 86 (1) ◽  
pp. 199-208 ◽  
Author(s):  
G V Brown
Keyword(s):  
Electron Beam ◽  
Cross Sections ◽  
Ion Trap ◽  
Diagnostic Utility ◽  
The Sun ◽  
Model Calculations ◽  
Atomic Theory ◽  
X Ray ◽  
Electron Beam Ion Trap ◽  
Intercombination Line

X-ray emission from neon-like Fe XVII has been measured with high-resolution spectrometers from laboratory or celestial sources for nearly seven decades. Two of the strongest lines regularly identified in these spectra are the 1P1 → 1S0 resonance and the 3D1 → 1S0 intercombination line, known as 3C and 3D, respectively. This paper gives a brief overview of measurements of the intensities of the lines 3C and 3D from laboratory and celestial sources and their comparison to model calculations, with an emphasis on measurements completed using an electron beam ion trap. It includes a discussion of the measured absolute cross sections compared with results from modern atomic theory calculations as well as the diagnostic utility of the relative intensity, R = I3C/I3CD, as it applies to the interpretation of spectra measured from the Sun and extra-solar sources. PACS Nos.: 32.30.Rj, 32.30.–r, 32.70.Cs, 52.72.+v, 95.85.Nv, 96.60.P–, 97.10.Ex

Soft-X-ray spectra of highly charged Au ions in an electron-beam ion trap

2001 ◽  
Vol 79 (2-3) ◽  
pp. 153-162 ◽  
Author(s):  
E Träbert ◽  
P Beiersdorfer ◽  
K B Fournier ◽  
S B Utter ◽  
K L Wong
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Large Scale ◽  
Ion Trap ◽  
Electron Beam Energy ◽  
X Ray ◽  
Maximum Charge ◽  
Electron Beam Ion Trap ◽  
Atomic Structure Calculations ◽  
Structure Calculations

Systematic variation of the electron-beam energy in an electron-beam ion trap has been employed to produce soft-X-ray spectra (20 to 60 Å) of Au with well-defined maximum charge states ranging from Br- to Co-like ions. Guided by large-scale relativistic atomic structure calculations, the strongest Δn = 0 (n = 4 to n' = 4) transitions in Rb- to Cu-like ions (Au42+ – Au50+) have been identified. PACS Nos.: 32.30Rj, 39.30+w, 31.50+w, 32.20R

scholarly journals Measurements of L‐shell X‐ray emission lines of neonlike europium on an electron beam ion trap

2019 ◽  
Vol 49 (1) ◽  
pp. 21-24 ◽  
Author(s):  
Peter Beiersdorfer ◽  
Natalie Hell ◽  
Dmytro Panchenko ◽  
Greg V. Brown ◽  
Elmar Träbert ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Emission Lines ◽  
X Ray ◽  
Electron Beam Ion Trap

X-ray spectroscopy and spectropolarimetry of high energy density plasma complemented by LLNL electron beam ion trap experiments

2003 ◽  
Vol 74 (3) ◽  
pp. 1947-1950 ◽  
Author(s):  
A. S. Shlyaptseva ◽  
D. A. Fedin ◽  
S. M. Hamasha ◽  
S. B. Hansen ◽  
C. Harris ◽  
...  
Keyword(s):  
Electron Beam ◽  
Energy Density ◽  
Ion Trap ◽  
High Energy ◽  
High Energy Density ◽  
X Ray ◽  
Electron Beam Ion Trap ◽  
Density Plasma

Electron–ion interactions for trapped highly charged Ge ions

2006 ◽  
Vol 84 (1) ◽  
pp. 67-81 ◽  
Author(s):  
G Machtoub ◽  
J.R. Crespo López-Urrutia ◽  
X Zhang ◽  
H Tawara
Keyword(s):  
Electron Beam ◽  
Cross Sections ◽  
Ion Trap ◽  
Dielectronic Recombination ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Theoretical Simulation ◽  
X Ray ◽  
New Information ◽  
Excitation Processes

A theoretical simulation of complex K X-ray spectra including those from dielectronic recombination and excitation processes is presented for trapped highly charged germanium ions ( Geq+, q = 27–30) interacting with a dense electron beam. We carried out numerical calculations of transition rates, level energies, transition wavelengths, resonance and collision strengths, and satellite intensity factors. Analytical results related to cross sections of B- through He-like Ge ions were obtained as well. The simulated spectra, including the contribution from different charge states of Ge27+–Ge30+, show good overall agreement over a wide electron energy range with the available X-ray measurements from the Heidelberg electron beam ion trap (EBIT). We have also predicted the electron impact excitation cross-section ratios for different transitions of Ge29+ and Ge30+ ions. It should be emphasized that the present analysis can also provide new information and clues of possible temperature measurements for EBIT and other plasma diagnostics.PACS No.: 32.30.Rj

Wide-band, high-resolution soft x-ray spectrometer for the Electron Beam Ion Trap

1999 ◽  
Vol 70 (1) ◽  
pp. 280-283 ◽  
Author(s):  
G. V. Brown ◽  
P. Beiersdorfer ◽  
K. Widmann
Keyword(s):  
Electron Beam ◽  
High Resolution ◽  
Ion Trap ◽  
Wide Band ◽  
X Ray ◽  
Electron Beam Ion Trap

Absolute calibration of an x-ray spectrometer on the NIST electron-beam ion trap: control, design and systematics

1997 ◽  
Vol T73 ◽  
pp. 400-402 ◽  
Author(s):  
D Paterson ◽  
C T Chantler ◽  
C Q Tran ◽  
L T Hudson ◽  
F G Serpa ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
Control Design ◽  
Absolute Calibration ◽  
X Ray ◽  
Electron Beam Ion Trap

X-ray measurement of the ionization balance in an electron beam ion trap

1992 ◽  
Vol 72 (2) ◽  
pp. 234-238 ◽  
Author(s):  
K.L. Wong ◽  
P. Beiersdorfer ◽  
R.E. Marrs ◽  
B.M. Penetrante ◽  
K.J. Reed ◽  
...  
Keyword(s):  
Electron Beam ◽  
Ion Trap ◽  
X Ray ◽  
Electron Beam Ion Trap ◽  
Ionization Balance

Compact soft x-ray spectrometer for plasma diagnostics at the Heidelberg Electron Beam Ion Trap

2007 ◽  
Vol 78 (12) ◽  
pp. 123105 ◽  
Author(s):  
A. Lapierre ◽  
J. R. Crespo López-Urrutia ◽  
T. M. Baumann ◽  
S. W. Epp ◽  
A. Gonchar ◽  
...  
Keyword(s):  
Electron Beam ◽  
Plasma Diagnostics ◽  
Ion Trap ◽  
X Ray ◽  
Electron Beam Ion Trap
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