Space-charge limited density of consecutively injected electron pulses with uniform separation

Yao Li Liu, Peng Zhang, Shih Hung Chen, Lay Kee Ang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A one-dimensional model to study the space-charge limited density injection of a train of multiple electron pulse into a diode is presented. It is found that there is a maximal value of charge density per pulse for N number of pulse of equal time separation that can be injected. By comparing with numerical solutions, we obtain an analytical formula, which can quickly provide such upper limit of charge density injection once the values of gap spacing, gap voltage and the initial time separation between the pulses are provided. The model has been verified with the numerical solutions of the equation of motion up to a few MeV of beam energy for which the relativistic effect is included. This work should be useful in the design of multiple pulses of electron guns in the application of ultra-fast electron microscopy or free electron lasers.

Original languageEnglish
Title of host publicationProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479971107
DOIs
StatePublished - 25 Aug 2015
Event16th IEEE International Vacuum Electronics Conference, IVEC 2015 - Beijing, China
Duration: 27 Apr 201529 Apr 2015

Publication series

NameProceedings of 2015 IEEE International Vacuum Electronics Conference, IVEC 2015

Conference

Conference16th IEEE International Vacuum Electronics Conference, IVEC 2015
Country/TerritoryChina
CityBeijing
Period27/04/1529/04/15

Keywords

  • charge sheet model
  • consecutive electron pulses
  • equation of motion (EOM)
  • space charge effect
  • ultra-fast electron microscopy (UEM)

Fingerprint

Dive into the research topics of 'Space-charge limited density of consecutively injected electron pulses with uniform separation'. Together they form a unique fingerprint.

Cite this