Angular distribution of X-ray transition radiation from regular radiators

2012 ◽  
Vol 696 ◽  
pp. 141-143 ◽  
Author(s):  
V.M. Grichine
Keyword(s):  
Angular Distribution ◽  
Transition Radiation ◽  
X Ray

scholarly journals Fine structure of angular distribution of x-ray transition radiation from multilayered radiator in Geant4

2020 ◽  
Vol 15 (06) ◽  
pp. C06024-C06024
Author(s):  
A.A. Savchenko ◽  
A.A. Tishchenko ◽  
D.Yu. Sergeeva ◽  
N. Belyaev ◽  
M. Cherry ◽  
...  
Keyword(s):  
Fine Structure ◽  
Angular Distribution ◽  
Transition Radiation ◽  
X Ray

Angular Distribution and Thickness Dependence of Transition Radiation from Thin Aluminum Foils

1965 ◽  
Vol 139 (5A) ◽  
pp. A1455-A1458 ◽  
Author(s):  
R. J. Herickhoff ◽  
W. F. Hanson ◽  
E. T. Arakawa ◽  
R. D. Birkhoff
Keyword(s):  
Angular Distribution ◽  
Transition Radiation ◽  
Thickness Dependence ◽  
Thin Aluminum

scholarly journals Reorientation of α-Fe2O3crystallites in an external magnetic field

2014 ◽  
Vol 70 (a1) ◽  
pp. C165-C165
Author(s):  
Michał Stękiel ◽  
Radosław Przeniosło ◽  
Dariusz Wardecki ◽  
Thomas Buslaps ◽  
Jacek Jasiński
Keyword(s):  
Magnetic Field ◽  
Angular Distribution ◽  
External Field ◽  
Intensity Distribution ◽  
Azimuthal Angle ◽  
Magnetic Interaction ◽  
Cylindrical Container ◽  
Ambient Conditions ◽  
X Ray ◽  
Weak Ferromagnetic

The magnetic interaction between the crystallites of weak ferromagnetic α-Fe2O3 has been studied by combining SR based X-ray diffraction with an externally applied magnetic field. The measurements were performed with several polycrystalline α-Fe2O3 [1,2] samples (dry or in suspensions) placed in a half-filled cylindrical container in ambient conditions. The axis of the cylindrical container was oriented vertically parallel to the applied dc magnetic field. The polycrystalline sample had a free surface, so the α-Fe2O3 crystallites were free to move. The full Debye-Scherrer diffraction rings were measured with a 2D pixel detector at the beamline ID-15B at ESRF. In the absence of the magnetic field the intensity distribution over azimuthal angle was a uniform, i.e. there was no texture. The applied maximal field, B=0.9T was too small to change the magnetic ordering of α-Fe2O3 but it was sufficiently strong to reorient large amount of crystallites in order to minimize the angle between their ferromagnetic moment direction and the external field. Pronounced texture patterns with clear maxima in the angular distribution of the intensity across each Debye-Scherrer ring were observed. The observed textured intensity distribution was analyzed quantitatively by using a model based on the magnetic anisotropy observed in single crystals of α-Fe2O3. The analysis yielded two important parameters: (i) the width of the angular distribution of the ferromagnetic moments directions around the external field direction, and (ii) the relative quantity of the crystallites that did reorient in the external field. The α-Fe2O3 samples were also characterized with TEM technique. The analysis of X-ray and TEM studies provide new conclusions about the magnetic interaction between the α-Fe2O3 crystallites [3]. The proposed measurement technique can be applied to study other weak ferromagnetic materials.

Detection of x-ray transition radiation with multiwire proportional chambers

1971 ◽  
Vol 97 (2) ◽  
pp. 389-393 ◽  
Author(s):  
H. Uto ◽  
Luke C.L. Yuan ◽  
G.F. Dell ◽  
C.L. Wang
Keyword(s):  
Transition Radiation ◽  
X Ray ◽  
Multiwire Proportional Chambers

scholarly journals Effects of Compton scattering on the neutron star radius constraints in rotation-powered millisecond pulsars

2019 ◽  
Vol 627 ◽  
pp. A39 ◽  
Author(s):  
Tuomo Salmi ◽  
Valery F. Suleimanov ◽  
Juri Poutanen
Keyword(s):  
Angular Distribution ◽  
Neutron Star ◽  
Energy Spectrum ◽  
Compton Scattering ◽  
Electron Scattering ◽  
Exact Formulation ◽  
Millisecond Pulsars ◽  
X Ray ◽  
Synthetic Phase ◽  
Neutron Star Radius

The aim of this work is to study the possible effects and biases on the radius constraints for rotation-powered millisecond pulsars when using Thomson approximation to describe electron scattering in the atmosphere models, instead of using exact formulation for Compton scattering. We compare the differences between the two models in the energy spectrum and angular distribution of the emitted radiation. We also analyse a self-generated, synthetic, phase-resolved energy spectrum, based on Compton atmosphere and the most X-ray luminous, rotation-powered millisecond pulsars observed by the Neutron star Interior Composition ExploreR (NICER). We derive constraints for the neutron star parameters using both the Compton and Thomson models. The results show that the method works by reproducing the correct parameters with the Compton model. However, biases are found in both the size and the temperature of the emitting hotspot, when using the Thomson model. The constraints on the radius are still not significantly changed, and therefore the Thomson model seems to be adequate if we are interested only in the radius measurements using NICER.

Design and Analysis of Resonance Transition Radiation X-ray Source for Tabletop Synchrotron

2007 ◽  
Author(s):  
Koji Sugano ◽  
Weiyu Sun ◽  
Toshiyuki Tsuchiya ◽  
Osamu Tabata
Keyword(s):  
Transition Radiation ◽  
Resonance Transition ◽  
X Ray
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