scholarly journals Modeling the influence of electron beam energy distribution on quality of radiation processing

2018 ◽  
Keyword(s):  
Electron Beam ◽  
Energy Distribution ◽  
Beam Energy ◽  
Computer Experiments ◽  
International Standards ◽  
Energy Spread ◽  
Electron Beam Energy ◽  
Radiation Processing ◽  
Empirical Formulas ◽  
Depth Dose

The obtained values of most probable energy and practical range have been compared to values calculated according to the formula proposed by the internationally recognized documents. The presented results of the study are focused on the issue of the influence of electron beam energy spread on the depth dose distribution and practical range of electron beam in the irradiated material. The computational experiments have been performed using the Monte-Carlo simulation method for modeling the electron beam energy spectra and depth dose distributions of electrons in aluminum target. Obtained values of most probable energy Ep and practical range Rp have been compared to the values calculated according to formula proposed by the internationally recognized report. The value of a practical range of electrons Rp strongly depends on electron beam energy spread, even in case when value of most probable energy Ep of electrons in the beam is unchanged. Results of computer experiments show that in case of a large energy spread, and presence of asymmetry of electron energy distribution, the electrons energy can’t be determined properly by empirical formulas included to the international standards.

scholarly journals Control of electron beam energy-spread by beam loading effects in a laser-plasma accelerator

2020 ◽  
Vol 62 (5) ◽  
pp. 055004 ◽  
Author(s):  
Guangyu Li ◽  
Quratul Ain ◽  
Song Li ◽  
Muhammad Saeed ◽  
Daniel Papp ◽  
...  
Keyword(s):  
Electron Beam ◽  
Laser Plasma ◽  
Beam Energy ◽  
Plasma Accelerator ◽  
Energy Spread ◽  
Electron Beam Energy ◽  
Beam Loading ◽  
Loading Effects ◽  
Laser Plasma Accelerator

scholarly journals Estimation of the Electron Beam Energy Spread for TEM Information Limit

2002 ◽  
Vol 8 (S02) ◽  
pp. 480-481 ◽  
Author(s):  
Michael A. O'Keefe ◽  
Peter C. Tiemeijer ◽  
Maxim V. Sidorov
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Energy Spread ◽  
Electron Beam Energy

scholarly journals A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Xi Yang ◽  
Junjie Li ◽  
Mikhail Fedurin ◽  
Victor Smaluk ◽  
Lihua Yu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electron Diffraction ◽  
Diffraction Pattern ◽  
Real Time ◽  
Beam Energy ◽  
Energy Spread ◽  
Radial Mode ◽  
Electron Beam Energy ◽  
Ultrafast Electron Diffraction ◽  
Electron Volt

AbstractA real-time, nondestructive, Bragg-diffracted electron beam energy, energy-spread and spatial-pointing jitter monitor is experimentally verified by encoding the electron beam energy and spatial-pointing jitter information into the mega-electron-volt ultrafast electron diffraction pattern. The shot-to-shot fluctuation of the diffraction pattern is then decomposed to two basic modes, i.e., the distance between the Bragg peaks as well as its variation (radial mode) and the overall lateral shift of the whole pattern (drift mode). Since these two modes are completely decoupled, the Bragg-diffraction method can simultaneously measure the shot-to-shot energy fluctuation from the radial mode with 2·10−4 precision and spatial-pointing jitter from the drift mode having wide measurement span covering energy jitter range from 10−4 to 10−1. The key advantage of this method is that it allows us to extract the electron beam energy spread concurrently with the ongoing experiment and enables online optimization of the electron beam especially for future high charge single-shot ultrafast electron diffraction (UED) and ultrafast electron microscopy (UEM) experiments. Furthermore, real-time energy measurement enables the filtering process to remove off-energy shots, improving the resolution of time-resolved UED. As a result, this method can be applied to the entire UED user community, beyond the traditional electron beam diagnostics of accelerators used by accelerator physicists.

scholarly journals Compensating the electron beam energy spread by the natural transverse gradient of laser undulator in all-optical x-ray light sources

2014 ◽  
Vol 22 (11) ◽  
pp. 13880 ◽  
Author(s):  
Tong Zhang ◽  
Chao Feng ◽  
Haixiao Deng ◽  
Dong Wang ◽  
Zhimin Dai ◽  
...  
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Energy Spread ◽  
Light Sources ◽  
Electron Beam Energy ◽  
X Ray ◽  
All Optical ◽  
Transverse Gradient ◽  
Natural Transverse

scholarly journals Undulator-Based Laser Wakefield Accelerator Electron Beam Energy Spread and Emittance Diagnostic

2010 ◽  
Author(s):  
M. S. Bakeman ◽  
J. Van Tilborg ◽  
K. Nakamura ◽  
A. Gonsalves ◽  
J. Osterhoff ◽  
...  
Keyword(s):  
Electron Beam ◽  
Beam Energy ◽  
Energy Spread ◽  
Electron Beam Energy ◽  
Laser Wakefield ◽  
Wakefield Accelerator ◽  
Laser Wakefield Accelerator
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