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Title: A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction

Abstract

A 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 electronmore » beam diagnostics of accelerators used by accelerator physicists.« less

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [1];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. ShanghaiTech Univ., Shanghai (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1576224
Report Number(s):
BNL-212362-2019-JAAM
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Yang, Xi, Li, Junjie, Fedurin, Mikhail, Smaluk, Victor, Yu, Lihua, Wu, Lijun, Wan, Weishi, Zhu, Yimei, and Shaftan, Timur. A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction. United States: N. p., 2019. Web. doi:10.1038/s41598-019-53824-9.
Yang, Xi, Li, Junjie, Fedurin, Mikhail, Smaluk, Victor, Yu, Lihua, Wu, Lijun, Wan, Weishi, Zhu, Yimei, & Shaftan, Timur. A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction. United States. doi:10.1038/s41598-019-53824-9.
Yang, Xi, Li, Junjie, Fedurin, Mikhail, Smaluk, Victor, Yu, Lihua, Wu, Lijun, Wan, Weishi, Zhu, Yimei, and Shaftan, Timur. Wed . "A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction". United States. doi:10.1038/s41598-019-53824-9. https://www.osti.gov/servlets/purl/1576224.
@article{osti_1576224,
title = {A novel nondestructive diagnostic method for mega-electron-volt ultrafast electron diffraction},
author = {Yang, Xi and Li, Junjie and Fedurin, Mikhail and Smaluk, Victor and Yu, Lihua and Wu, Lijun and Wan, Weishi and Zhu, Yimei and Shaftan, Timur},
abstractNote = {A 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.},
doi = {10.1038/s41598-019-53824-9},
journal = {Scientific Reports},
number = 1,
volume = 9,
place = {United States},
year = {2019},
month = {11}
}

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