Storage ring FEL dynamics: an analytical treatment

1988 ◽  
Vol 101 (6) ◽  
pp. 703-714 ◽  
Author(s):  
G. Dattoli ◽  
L. Giannessi ◽  
H. Fang ◽  
A. Renieri ◽  
A. Torre
Keyword(s):  
Storage Ring ◽  
Analytical Treatment

Atomic Imaging of Crystals using Large-Angle Electron Scattering in STEM

1990 ◽  
Vol 48 (1) ◽  
pp. 74-75
Author(s):  
D.E. Jesson ◽  
S. J. Pennycook
Keyword(s):  
Wave Function ◽  
Electron Scattering ◽  
Numerical Solutions ◽  
Large Angle ◽  
Real Space ◽  
High Angle ◽  
Analytical Treatment ◽  
Order Zero ◽  
Experimental Conditions ◽  
Ewald Sphere

It is well known that conventional atomic resolution electron microscopy is a coherent imaging process best interpreted in reciprocal space using contrast transfer function theory. This is because the equivalent real space interpretation involving a convolution between the exit face wave function and the instrumental response is difficult to visualize. Furthermore, the crystal wave function is not simply related to the projected crystal potential, except under a very restrictive set of experimental conditions, making image simulation an essential part of image interpretation. In this paper we present a different conceptual approach to the atomic imaging of crystals based on incoherent imaging theory. Using a real-space analysis of electron scattering to a high-angle annular detector, it is shown how the STEM imaging process can be partitioned into components parallel and perpendicular to the relevant low index zone-axis.It has become customary to describe STEM imaging using the analytical treatment developed by Cowley. However, the convenient assumption of a phase object (which neglects the curvature of the Ewald sphere) fails rapidly for large scattering angles, even in very thin crystals. Thus, to avoid unpredictive numerical solutions, it would seem more appropriate to apply pseudo-kinematic theory to the treatment of the weak high angle signal. Diffraction to medium order zero-layer reflections is most important compared with thermal diffuse scattering in very thin crystals (<5nm). The electron wave function ψ(R,z) at a depth z and transverse coordinate R due to a phase aberrated surface probe function P(R-RO) located at RO is then well described by the channeling approximation;

Scientific program of DERICA — prospective accelerator and storage ring facility for radioactive ion beam research

2018 ◽  
Vol 189 (07) ◽  
pp. 721-738
Author(s):  
Leonid V. Grigorenko ◽  
Boris Yu. Sharkov ◽  
Andrei S. Fomichev ◽  
Aleksei L. Barabanov ◽  
V. Bart ◽  
...  
Keyword(s):  
Storage Ring ◽  
Ion Beam ◽  
Scientific Program ◽  
Radioactive Ion Beam ◽  
And Storage

scholarly journals Kinetics of 1- and 2-methylallyl + O2 reaction, investigated by photoionisation using synchrotron radiation

2021 ◽  
Author(s):  
Domenik Schleier ◽  
Engelbert Reusch ◽  
Marius Gerlach ◽  
Tobias Preitschopf ◽  
Deb Pratim Mukhopadhyay ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Reaction Kinetics ◽  
Molecular Oxygen ◽  
Light Source ◽  
Storage Ring ◽  
Vacuum Ultraviolet ◽  
Flow Tube ◽  
Tube Reactor ◽  
Swiss Light Source ◽  
Kinetics Of

The reaction kinetics of the isomers of the methylallyl radical with molecular oxygen has been studied in a flow tube reactor at the vacuum ultraviolet (VUV) beamline of the Swiss Light Source storage ring.

scholarly journals Continuously tunable narrowband pulses in the THz gap from laser-modulated electron bunches in a storage ring

2017 ◽  
Vol 20 (2) ◽  
Author(s):  
P. Ungelenk ◽  
M. Höner ◽  
H. Huck ◽  
S. Khan ◽  
C. Mai ◽  
...  
Keyword(s):  
Storage Ring ◽  
Electron Bunches

scholarly journals Vertical-longitudinal coupling induced by wakefields at the Cornell Electron-Positron Storage Ring Test Accelerator

2018 ◽  
Vol 21 (2) ◽  
Author(s):  
S. T. Wang ◽  
J. D. Perrin ◽  
S. Poprocki ◽  
W. Hartung ◽  
D. L. Rubin
Keyword(s):  
Storage Ring ◽  
Ring Test ◽  
Electron Positron

scholarly journals Simulation of the transit-time optical stochastic cooling process in the Cornell Electron Storage Ring

2021 ◽  
Vol 24 (6) ◽  
Author(s):  
S. T. Wang ◽  
M. B. Andorf ◽  
I. V. Bazarov ◽  
W. F. Bergan ◽  
V. Khachatryan ◽  
...  
Keyword(s):  
Transit Time ◽  
Storage Ring ◽  
Cooling Process ◽  
Electron Storage ◽  
Cornell Electron Storage Ring ◽  
Optical Stochastic Cooling
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