Demonstration of Transient Collisional Excitation X-Ray Lasers in Gases

2002 ◽  
Author(s):  
P. Lu
Keyword(s):  
Collisional Excitation ◽  
X Ray

Transient collisional excitation X-ray laser generation with picoseconds laser pulses

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-39-Pr2-42 ◽  
Author(s):  
M. Kado ◽  
T. Kawachi ◽  
N. Hasegawa ◽  
M. Tanaka ◽  
K. Sukegawa ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Laser Generation ◽  
Collisional Excitation ◽  
X Ray

Gain profile of transient collisional excitation X-ray laser

2001 ◽  
Vol 11 (PR2) ◽  
pp. Pr2-55-Pr2-57
Author(s):  
M. Tanaka ◽  
T. Kawachi ◽  
M. Kado ◽  
N. Hasegawa ◽  
K. Sukegawa ◽  
...  
Keyword(s):  
Collisional Excitation ◽  
X Ray ◽  
Gain Profile

scholarly journals Review of the soft-X-ray laser research at CEL-V

1991 ◽  
Vol 9 (2) ◽  
pp. 493-499
Author(s):  
D. Naccache ◽  
J-L. Bourgade ◽  
P. Combis ◽  
C. J. Keane ◽  
J-P. Le Breton ◽  
...  
Keyword(s):  
Atomic Number ◽  
Collisional Excitation ◽  
X Ray ◽  
Order Of Magnitude ◽  
Laser Experiments ◽  
Magnitude Increase

We present some significant results of collisional excitation X-ray laser experiments in plasmas produced by a laser. We studied the amplification in Ne- and Ni-like ions by varying both the nature and the thickness of targets, the irradiation, and the wavelength of the driving laser. Some potentially interesting scalings as a function of the atomic number of the lasing element are demonstrated in the Ne-like system. An order-of-magnitude increase in gain in the Ni-like experiments was determined.

Transient collisional excitation X-ray lasers with 1-ps tabletop drivers

1999 ◽  
Vol 5 (6) ◽  
pp. 1441-1446 ◽  
Author(s):  
J. Dunn ◽  
A.I. Osterheld ◽  
Yuelin Li ◽  
J. Nilsen ◽  
V.N. Shlyaptsev
Keyword(s):  
Collisional Excitation ◽  
X Ray

Longitudinal-Pumping and Transient Collisional Excitation of High Performance Ni-Like Soft-X-Ray Lasers

2001 ◽  
Vol 40 (Part 1, No. 2B) ◽  
pp. 1018-1021 ◽  
Author(s):  
Tsuneyuki Ozaki ◽  
Keiichi Yamamoto ◽  
Ruxin Li ◽  
Hiroto Kuroda
Keyword(s):  
High Performance ◽  
Collisional Excitation ◽  
X Ray

scholarly journals Recent Advances in Atomic Modeling

1990 ◽  
Vol 115 ◽  
pp. 21-31
Author(s):  
W. H. Goldstein
Keyword(s):  
Accretion Disks ◽  
Inertial Confinement Fusion ◽  
Large Scale ◽  
Inertial Confinement ◽  
Collisional Excitation ◽  
Laboratory Plasma ◽  
X Ray ◽  
Laboratory Plasmas ◽  
Confinement Fusion ◽  
Solar Plasmas

AbstractPrecision spectroscopy of solar plasmas has historically been the goad for advances in calculating the atomic physics and dynamics of highly ionized atoms. Recent efforts to understand the laboratory plasmas associated with magnetic and inertial confinement fusion, and with X-ray laser research, have played a similar role. Developments spurred by laboratory plasma research are applicable to the modeling of high-resolution spectra from both solar and cosmic X-ray sources, such as the photo-ionized plasmas associated with accretion disks. Three of these developments in large scale atomic modeling are reviewed: a new method for calculating large arrays of collisional excitation rates, a sum rule based method for extending collisional-radiative models and modeling the effects of autoionizing resonances, and a detailed level accounting calculation of resonant excitation rates in FeXVII.

NEAR FIELD IMAGING OF THE TRANSIENT COLLISIONAL EXCITATION Ni-LIKE Ag X-RAY LASER

2002 ◽  
Vol 09 (01) ◽  
pp. 641-644 ◽  
Author(s):  
MOMOKO TANAKA ◽  
TETSUYA KAWACHI ◽  
MASATAKA KADO ◽  
NOBORU HASEGAWA ◽  
KOUTA SUKEGAWA ◽  
...  
Keyword(s):  
Near Field ◽  
Target Surface ◽  
Imaging Method ◽  
Collisional Excitation ◽  
Spatial Profile ◽  
X Ray ◽  
Near Field Imaging ◽  
Field Imaging

The spatial profile of the transient collisional excitation Ni-like Ag X-ray laser in various plasma lengths was observed using the near field imaging method. The gain region was the size of 50 μm and 30–50 μm distant from the target surface. The shapes of the gain region were crescent shape or consisted of two spots.

Collisional excitation x-ray lasers: Toward a compact x-ray source

1996 ◽  
Vol 33 (1-3) ◽  
pp. 255-260
Author(s):  
Yoshiaki Kato ◽  
Hiroyuki Daido ◽  
Ryosuke Kodama ◽  
Kensuke Murai ◽  
Fumihiro Koike
Keyword(s):  
Collisional Excitation ◽  
X Ray

The Soft X-Ray Laser Program at Livermore

1988 ◽  
Vol 102 ◽  
pp. 221
Author(s):  
R.A. London ◽  
N.M. Ceglio ◽  
D.C. Eder ◽  
A.U. Hazi ◽  
C.J. Keane ◽  
...  
Keyword(s):  
Laser Light ◽  
Thin Foil ◽  
Dielectronic Recombination ◽  
Theoretical Modelling ◽  
Collisional Excitation ◽  
X Ray ◽  
Dense Plasmas ◽  
Spatial And Temporal Distributions ◽  
Laser Facility ◽  
Optical Laser

AbstractWe describe the experiments and supporting theoretical modelling to develop and characterize soft x-ray lasers. The x-ray lasers are created in dense plasmas produced by optical laser irradiation of solid targets with line focussed beams. We use mainly thin foil targets, which upon appropriate illumination, produce rather uniform plasmas. We consider laser schemes pumped by electron collisional excitation and dielectronic recombination in Ne-like and Ni-like ions, and schemes pumped by collisional and radiative recombination following rapid cooling for H-like and Li-like ions.Experimental measurements of the time and space resolved spectra taken both along the lasing axis and at other viewing angles, in addition to data on the angular pattern of x-ray laser radiation and on the absorption and scattering of the optical laser light are presented. These data allow us the determine the characteristics of the plasmas which have been created, as well as the properties of the x-ray lasers, such as the gain coefficients for the inverted transitions, and their spatial and temporal distributions. The modelling includes calculations of the absorption of the optical laser light, the hearing and hydrodynamics of the targets and the evolution of the atomic level populations within the plasma. Transfer of the emitted radiation is calculated, including resonance line trapping, amplification for inverted transitions, and refraction of the x-ray laser beam due to electron density gradients. Results are used to optimize x-ray laser designs before the experiments and to interpret the measured spectra.The latest experimental results from the NOVA laser facility on the performance of several laser schemes and on the use of multilayer mirrors to produce x-ray laser cavities are reported. These results arc compared to the models to test and improve our understanding of the complex physics involved in making x-ray lasers. Based on current experiments, we show how the modelling can be use to design shorter wavelength and more efficient schemes for use in applications such as x-ray holography.

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