scholarly journals Design and simulation study of ultra-fast beam bunches split for three orthogonal planes high-energy electron dynamic radiography

2017 ◽  
Vol 35 (4) ◽  
pp. 579-586 ◽  
Author(s):  
Q.T. Zhao ◽  
S.C. Cao ◽  
X.K. Shen ◽  
Y.R. Wang ◽  
Y. Zong ◽  
...  
Keyword(s):  
Simulation Study ◽  
High Energy ◽  
Energy Electron ◽  
Dynamics Simulation ◽  
High Energy Electron ◽  
Electron Dynamic ◽  
Radiography System ◽  
Beam Parameters ◽  
Beam Dynamics Simulation ◽  
Split System

AbstractHere a compact three orthogonal planes high-energy electron radiography system was proposed. One of the critical technologies, the ultra-fast beam bunches split from the bunch train are studied. The separated bunches could be transported to the three orthogonal planes of the target for dynamic radiography diagnostics. The key elements of the ultra-fast bunches split system are transverse deflecting cavity (TDC) and the twin septum magnet (TSM). The principle of TDC and TSM are briefly introduced. An example of the beam bunches split system for test experiment (40 MeV electron beam) with TDC and TSM is designed and studied by particle-tracking simulation and it confirms this method is valid and feasible. Especially with TSM, a compact three orthogonal planes radiography system can be realized. The evolution of the beam parameters along the beam line from simulation are investigated. The detailed design of the beam split system and beam dynamics simulation study are presented in this paper.

Influence of high energy electron irradiation on beam parameters measurement system

2012 ◽  
Vol 24 (4) ◽  
pp. 949-952
Author(s):  
王远 Wang Yuan ◽  
谢宇彤 Xie Yutong ◽  
陈思富 Chen Sifu ◽  
江孝国 Jiang Xiaoguo ◽  
朱隽 Zhu Jun ◽  
...  
Keyword(s):  
Electron Irradiation ◽  
Measurement System ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Beam Parameters ◽  
Parameters Measurement

SU-D-19A-06: The Effect of Beam Parameters On Very High-Energy Electron Radiotherapy: A Planning Study

2014 ◽  
Vol 41 (6Part3) ◽  
pp. 111-111
Author(s):  
B Palma ◽  
M Bazalova ◽  
B Hardemark ◽  
E Hynning ◽  
B Qu ◽  
...  
Keyword(s):  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Planning Study ◽  
Very High Energy ◽  
Beam Parameters ◽  
Electron Radiotherapy ◽  
Very High

Kinematic Approximations in TED and RHEED Analysis of Reconstructed Surfaces

1990 ◽  
Vol 48 (2) ◽  
pp. 396-397
Author(s):  
L. -M. Peng ◽  
M. J. Whelan
Keyword(s):  
Electron Diffraction ◽  
Kinematic Analysis ◽  
Incident Beam ◽  
High Energy ◽  
Energy Electron ◽  
Great Success ◽  
High Energy Electron ◽  
Kinematic Approximation ◽  
Reconstructed Surfaces

In recent years there has been a trend in the structure determination of reconstructed surfaces to use high energy electron diffraction techniques, and to employ a kinematic approximation in analyzing the intensities of surface superlattice reflections. Experimentally this is motivated by the great success of the determination of the dimer adatom stacking fault (DAS) structure of the Si(111) 7 × 7 reconstructed surface.While in the case of transmission electron diffraction (TED) the validity of the kinematic approximation has been examined by using multislice calculations for Si and certain incident beam directions, far less has been done in the reflection high energy electron diffraction (RHEED) case. In this paper we aim to provide a thorough Bloch wave analysis of the various diffraction processes involved, and to set criteria on the validity for the kinematic analysis of the intensities of the surface superlattice reflections.The validity of the kinematic analysis, being common to both the TED and RHEED case, relies primarily on two underlying observations, namely (l)the surface superlattice scattering in the selvedge is kinematically dominating, and (2)the superlattice diffracted beams are uncoupled from the fundamental diffracted beams within the bulk.

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