Results 101 to 110 of about 50,958 (240)

Multiplate focusing collimator [PDF]

, 1975
An appartus is described for scanning relatively small near sources of penetrating radiation to obtain the energy distribution thereof, wherein a collimator assembly is interposed between a radiation source and a radiation detector.
Hoover, R. B., Underwood, J. H.
core   +1 more source

First simultaneous observation of co- and counter-current fast-ion losses in the ASDEX Upgrade tokamak

Nuclear Fusion
In ITER and future fusion power plants, the source of the fusion born alpha particles is almost isotropic in pitch angle, thus having co- and counter-current populations.
A. Reyner-Viñolas, J. Hidalgo-Salaverri, J. Galdon-Quiroga, J. Rueda-Rueda, J. Gonzalez-Martin, J.M. Ordoñez-Jimenez, R. Marques, M. Jimenez-Comez, P.A. Schneider, R. Bilato, M. Garcia-Muñoz, the ASDEX Upgrade Team, the EUROfusion Tokamak Exploitation Team   +12 more
doaj   +1 more source

X-ray emission from high temperature plasmas [PDF]

The physical processes occurring in plasma focus devices were studied. These devices produce dense high temperature plasmas, which emit X rays of hundreds of KeV energy and one to ten billion neutrons per pulse.
Harries, W. L.
core   +2 more sources

Quantitative imaging of anisotropic material properties with vectorial ptychography

, 2018
Following the recent establishment of the formalism of vectorial ptychography [Ferrand et al., Opt. Lett. 40, 5144 (2015)], first measurements are reported in the optical range, demonstrating the capability of the proposed method to map the four ...
Allain, Marc, Baroni, Arthur, Chamard, Virginie, Ferrand, Patrick   +3 more
core   +3 more sources

Development of a real-time gamma camera for high radiation fields

Nuclear Engineering and Technology
In high radiation fields, gamma cameras suffer from pulse pile-up, resulting in poor energy resolution, count losses, and image distortion. To overcome this problem, various methods have been introduced to reduce the size of the aperture or pixel, reject
Minju Lee, Yoonhee Jung, Sang-Han Lee
doaj   +1 more source

Test method for telescopes using a point source at a finite distance [PDF]

A test method for telescopes that makes use of a focused ring formed by an annular aperture when using a point source at a finite distance is evaluated theoretically and experimentally.
Griner, D. B., Korsch, D., Zissa, D. E.
core   +1 more source

Research in extreme ultraviolet and far ultraviolet astronomy [PDF]

The Far Ultraviolet imager (FUVI) was flown on the Aries class sounding rocket 24.015, producing outstanding results. The diffuse extreme ultraviolet (EUV) background spectrometer which is under construction is described. It will be launched on the Black
Bowyer, C. S.
core   +1 more source

Comparison between Radionuclide Ventriculography and Echocardiography for Quantification of Left Ventricular Systolic Function in Rats Exposed to Doxorubicin

Arquivos Brasileiros de Cardiologia
Background: Radionuclide ventriculography (RV) is a validated method to evaluate the left ventricular systolic function (LVSF) in small rodents. However, no prior study has compared the results of RV with those obtained by other imaging methods in this ...
Luciano Fonseca Lemos de Oliveira, João Lucas O'Connell, Eduardo Elias Vieira de Carvalho, Érica Carolina Campos Pulici, Minna Moreira Dias Romano, Benedito Carlos Maciel, Marcus Vinicius Simões   +6 more
doaj   +1 more source

Interferometric measurement of the velocity of radiating particles [PDF]

, 1972
Electro-optical system for measuring very small Doppler shift displacements of spectral wavelengths emitted by atoms and ions in high velocity plasma beam is discussed.
Aisenberg, S.
core   +1 more source

Oblique focus ICCD laboratory evaluation [PDF]

An oblique focus intensified charge coupled device (ICCD) was constructed and operated in a vacuum system. Special gratings were obtained and an optical system set up to try to model a candidate UV spectrometer (Milieu Interstellaire et Intergalactique ...
York, D. G.
core   +1 more source