scholarly journals Synchrotron radiation from a runaway electron distribution in tokamaks

2013 ◽  
Vol 20 (9) ◽  
pp. 093302 ◽  
Author(s):  
A. Stahl ◽  
M. Landreman ◽  
G. Papp ◽  
E. Hollmann ◽  
T. Fülöp
Keyword(s):  
Synchrotron Radiation ◽  
Electron Distribution ◽  
Runaway Electron

scholarly journals Models of primary runaway electron distribution in the runaway vortex regime

2017 ◽  
Vol 24 (11) ◽  
pp. 112508 ◽  
Author(s):  
Zehua Guo ◽  
Xian-Zhu Tang ◽  
Christopher J. McDevitt
Keyword(s):  
Electron Distribution ◽  
Runaway Electron

scholarly journals Runaway electron synchrotron radiation in a vertically translated plasma

2020 ◽  
Vol 60 (9) ◽  
pp. 094002
Author(s):  
M. Hoppe ◽  
G. Papp ◽  
T. Wijkamp ◽  
A. Perek ◽  
J. Decker ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Runaway Electron ◽  
Electron Synchrotron

Study of charge transfer in FeTi

1983 ◽  
Vol 41 ◽  
pp. 296-297
Author(s):  
J. Taft∅
Keyword(s):  
Charge Transfer ◽  
Charge Distribution ◽  
Electron Scattering ◽  
Periodic System ◽  
Electron Distribution ◽  
Scattering Amplitude ◽  
Transition Elements ◽  
Hartree Fock ◽  
Cscl Structure ◽  
The Right

It is well known that for reflections corresponding to large interplanar spacings (i.e., sin θ/λ small), the electron scattering amplitude, f, is sensitive to the ionicity and to the charge distribution around the atoms. We have used this in order to obtain information about the charge distribution in FeTi, which is a candidate for storage of hydrogen. Our goal is to study the changes in electron distribution in the presence of hydrogen, and also the ionicity of hydrogen in metals, but so far our study has been limited to pure FeTi. FeTi has the CsCl structure and thus Fe and Ti scatter with a phase difference of π into the 100-ref lections. Because Fe (Z = 26) is higher in the periodic system than Ti (Z = 22), an immediate “guess” would be that Fe has a larger scattering amplitude than Ti. However, relativistic Hartree-Fock calculations show that the opposite is the case for the 100-reflection. An explanation for this may be sought in the stronger localization of the d-electrons of the first row transition elements when moving to the right in the periodic table. The tabulated difference between fTi (100) and ffe (100) is small, however, and based on the values of the scattering amplitude for isolated atoms, the kinematical intensity of the 100-reflection is only 5.10-4 of the intensity of the 200-reflection.

Direct Observation of Monolayer Zones in Al-wt 4% Cu

1990 ◽  
Vol 48 (1) ◽  
pp. 14-15
Author(s):  
B. Jouffrey ◽  
D. Dorignac ◽  
A. Bourret
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Direct Observation ◽  
Supersaturated Solid Solution ◽  
Original Model ◽  
X Ray ◽  
Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

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