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No pain-no gain: The complex art of soft x-ray laser target design and analysis

Description: We review our methodologies in the design and analysis of soft x-ray laser experiments. We convolve large-scale 2-D hydro code output with detailed atomic data bases in a kinetics code with 1-D or 2-D line transfer. The time and space dependent level population data is then post processed further with a beam transport code, including refraction, to predict actual experimental results. While mysteries do remain, we present many examples that show how this complex modeling procedure is crucial in… more
Date: January 12, 1988
Creator: Rosen, M. D.; London, R. A.; Hagelstein, P. L.; Maxon, M. S.; Eder, D. C.; Whitten, B. L. et al.
Partner: UNT Libraries Government Documents Department
open access

Recent advances in atomic modeling

Description: Precision 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 photoionize… more
Date: October 12, 1988
Creator: Goldstein, W.H.
Partner: UNT Libraries Government Documents Department
open access

Premartensitic microstructures as seen in the high-resolution electron microscope: A study of a Ni-Al alloy

Description: The present study indicates that the B2 ..beta..-phase in quenched Ni/sub 62.5/Al/sub 37.5/ is distorted by displacement waves involving a planar shufflin of atoms resembling the final 7R martensite structure and with wavelenghts of the order of 1.3 nm. The appearance of a <110><110> type modulation with the indicated periodicity corresponds well with recent inelastic neutron scattering results which reveal nonlinear behavior in the TA<110> phonon dispersion curve around the same wavelengths in… more
Date: February 12, 1988
Creator: Schryvers, D.; Tanner, L. & Van Tendeloo, G.
Partner: UNT Libraries Government Documents Department
open access

Overview of sigma, /rho/ and dsigma/dt in high energy proton-antiproton scattering

Description: Recent results on the total cross section, real-to-imaginary ratio of the forward scattering amplitude, and the slope parameter are discussed. The ability of future Tevatron data to distinguish between alternative explanations of the large value of /rho/ measured by UA-4 is emphasized. 8 refs., 1 tab.
Date: July 12, 1988
Creator: Cahn, R.N.
Partner: UNT Libraries Government Documents Department
open access

A hard x-ray spectrometer for high angular resolution observations of cosmic sources

Description: LAXRIS (large area x-ray imaging spectrometer) is an experimental, balloon-borne, hard x-ray telescope that consists of a coaligned array of x-ray imaging spectrometer modules capable of obtaining high angular resolution (1--3 arcminutes) with moderate energy resolution in the 20- to 300-keV region. Each spectrometer module consists of a CsI(Na) crystal coupled to a position-sensitive phototube with a crossed-wire, resistive readout. Imaging is provided by a coded aperture mask with a 4-m focal… more
Date: August 12, 1988
Creator: Hailey, C. J.; Ziock, K. P.; Harrison, F.; Kahn, S. M.; Liedahl, D.; Lubin, P. M. et al.
Partner: UNT Libraries Government Documents Department
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