Modeling of generation of characteristic x-ray radiation under vacuum heating of electrons of nanocylinders

2021 ◽  
Vol 28 (10) ◽  
pp. 103104
Author(s):  
O. F. Kostenko
Keyword(s):  
X Ray ◽  
Vacuum Heating

An X-ray camera for single-crystal studies at high temperatures under controlled atmosphere

1982 ◽  
Vol 15 (2) ◽  
pp. 236-240 ◽  
Author(s):  
W. Aldhart ◽  
N. Tzafaras ◽  
S. Sueno ◽  
H. Jagodzinski ◽  
H. Huber
Keyword(s):  
Power Supply ◽  
Thermal Gradient ◽  
Pid Controller ◽  
Room Temperature ◽  
Absolute Temperature ◽  
Controlled Atmosphere ◽  
X Ray ◽  
Vacuum Heating ◽  
The Stability ◽  
Better Than

A vacuum heating camera has been developed for extremely low background X-ray film work between room temperature and 2000 K. It can be used with modified conventional Weissenberg goniometers and with a specially designed focusing goniometer. The temperature control is maintained by a Pt/Pt–10% Rh thermocouple, a three-term proportional, integral and derivative (PID) controller and a programmable power supply. The accuracy in the absolute temperature setting is 10 K, the stability better than 1 K and the maximum thermal gradient over the crystal 7 K mm−1 at 1330 K. A small oxygen pressure can be applied, depending on the temperature, to control oxidation or reduction reactions of the sample.

Ultra-high-vacuum heating camera forin situsynchrotron radiation X-ray topographic studies: erratum

1982 ◽  
Vol 15 (6) ◽  
pp. 632-632
Author(s):  
J. Gastaldi ◽  
C. Jourdan ◽  
P. Marzo ◽  
C. Allasia ◽  
J. N. Jullien
Keyword(s):  
High Vacuum ◽  
Ultra High Vacuum ◽  
X Ray ◽  
Vacuum Heating

scholarly journals Characteristic X-rays generation under the action of femtosecond laser pulses on nano-structured targets

2011 ◽  
Vol 29 (2) ◽  
pp. 249-254 ◽  
Author(s):  
A.V. Ovchinnikov ◽  
O.F. Kostenko ◽  
O.V. Chefonov ◽  
O.N. Rosmej ◽  
N.E. Andreev ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Line Emission ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Relative Increase ◽  
Metal Foil ◽  
X Rays ◽  
Fast Electrons ◽  
X Ray ◽  
Vacuum Heating

AbstractEnhancement of Kα yield from a metal foil covered with metal rods of submicron sizes, with low aspect ratio, irradiated by a p-polarized femtosecond laser pulses of about 1017 W/cm2 intensity is demonstrated. Obtained relative increase in Kα X-ray line emission is explained with a model of vacuum heating of fast electrons.

Ultra-high vacuum heating camera forin situsynchrotron radiation X-ray topographic studies

1982 ◽  
Vol 15 (4) ◽  
pp. 391-395 ◽  
Author(s):  
J. Gastaldi ◽  
C. Jourdan ◽  
P. Marzo ◽  
C. Allasia ◽  
J. N. Jullien
Keyword(s):  
High Vacuum ◽  
Ultra High Vacuum ◽  
X Ray ◽  
Vacuum Heating

A compact high vacuum heating chamber for in-situ x-ray scattering studies

2012 ◽  
Vol 83 (8) ◽  
pp. 083904 ◽  
Author(s):  
F. Bertram ◽  
C. Deiter ◽  
K. Pflaum ◽  
O. H. Seeck
Keyword(s):  
High Vacuum ◽  
Heating Chamber ◽  
X Ray ◽  
X Ray Scattering ◽  
Vacuum Heating ◽  
Ray Scattering

Space and Time Distribution of Hard X-Ray Emission in a Loop at the Beginning of a Flare

1994 ◽  
Vol 144 ◽  
pp. 275-277
Author(s):  
M. Karlický ◽  
J. C. Hénoux
Keyword(s):  
Time Distribution ◽  
Electron Bombardment ◽  
Spatial Evolution ◽  
Superthermal Electrons ◽  
Flare Loop ◽  
X Ray ◽  
Superthermal Electron ◽  
Flare Loops ◽  
Chromospheric Evaporation ◽  
Temporal And Spatial

AbstractUsing a new ID hybrid model of the electron bombardment in flare loops, we study not only the evolution of densities, plasma velocities and temperatures in the loop, but also the temporal and spatial evolution of hard X-ray emission. In the present paper a continuous bombardment by electrons isotropically accelerated at the top of flare loop with a power-law injection distribution function is considered. The computations include the effects of the return-current that reduces significantly the depth of the chromospheric layer which is evaporated. The present modelling is made with superthermal electron parameters corresponding to the classical resistivity regime for an input energy flux of superthermal electrons of 109erg cm−2s−1. It was found that due to the electron bombardment the two chromospheric evaporation waves are generated at both feet of the loop and they propagate up to the top, where they collide and cause temporary density and hard X-ray enhancements.

Some Problems in Understanding the Solar Corona

1994 ◽  
Vol 144 ◽  
pp. 1-9
Author(s):  
A. H. Gabriel
Keyword(s):  
Solar Corona ◽  
Solar Atmosphere ◽  
Theoretical Modelling ◽  
Total System ◽  
Major Advance ◽  
X Ray ◽  
Proper Perspective ◽  
Space Observations

The development of the physics of the solar atmosphere during the last 50 years has been greatly influenced by the increasing capability of observations made from space. Access to images and spectra of the hotter plasma in the UV, XUV and X-ray regions provided a major advance over the few coronal forbidden lines seen in the visible and enabled the cooler chromospheric and photospheric plasma to be seen in its proper perspective, as part of a total system. In this way space observations have stimulated new and important advances, not only in space but also in ground-based observations and theoretical modelling, so that today we find a well-balanced harmony between the three techniques.

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