scholarly journals Using the XFEL to drive the gain of inner-shell x-ray lasers using photo-ionization and photo-excitation processes

2015 ◽  
Author(s):  
Joseph Nilsen
Keyword(s):  
X Ray ◽  
Excitation Processes ◽  
Photo Ionization

Study of innershell photo-ionization-pumped L23M1 transition in Ca for the development of femtosecond X-ray laser

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-225-Pr2-231
Author(s):  
D. Kim ◽  
S. H. Son ◽  
J. H. Kim ◽  
Cs. Toth ◽  
C. P.J. Barty
Keyword(s):  
X Ray ◽  
Photo Ionization

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

Systematics of inner-shell photo-ionization X-ray lasers with constant pump rates

1995 ◽  
Vol 60 (6) ◽  
pp. 513-518 ◽  
Author(s):  
G. L. Strobel ◽  
R. A. London ◽  
D. C. Eder
Keyword(s):  
X Ray ◽  
Photo Ionization

Short wavelength X-ray laser scheme based on inner-shell photo-ionization of magnesium

1994 ◽  
Author(s):  
G. L. Strobel ◽  
D. C. Eder ◽  
P. Amendt ◽  
R. A. London ◽  
M. D. Rosen
Keyword(s):  
Short Wavelength ◽  
X Ray ◽  
Photo Ionization

scholarly journals A VO-based solution to the origin of soft X-ray emission in obscured AGN

2006 ◽  
Vol 2 (14) ◽  
pp. 582-582
Author(s):  
Matteo Guainazzi ◽  
I. Barbarisi ◽  
Stefano Bianchi ◽  
Miguel Cerviño ◽  
Pedro Osuna ◽  
...  
Keyword(s):  
High Resolution ◽  
Galactic Nuclei ◽  
High Resolution Spectroscopy ◽  
Striking Similarity ◽  
X Ray ◽  
Line Region ◽  
Resolution Imaging ◽  
Narrow Line Region ◽  
Photo Ionization ◽  
Intense Star Formation

Recent high-resolution imaging observations with Chandra have unveiled a striking similarity between the Narrow Line Region (NLR) and the diffuse soft (0.1-keV) emission-line dominated X-ray morphologies in a number of obscured Active Galactic Nuclei (AGN) on scales as large as 0.1-2kpc (Bianchi et al., 2006, A&, 448, 499). This discovery suggests a strong link between these components, which points toward a common physical origin. AGN photo-ionization is a natural explanation, consistent with soft X-ray high-resolution spectroscopy (Guainazzi & Bianchi, 2006, submitted). However, the possibility that the bulk of this component is generated by ‘local’ photo-ionization induced by shocks in the interaction between a radio jet and the interstellar matter, or by mechanical heating in regions of intense star formation cannot be ruled out yet.

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