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Title: Beam conditioner for free electron lasers and synchrotrons

Abstract

A focused optical is been used to introduce an optical pulse, or electromagnetic wave, colinearly with the electron beam in a free electron laser or synchrotron thereby adding an axial field component that accelerates the electrons on the radial outside of the distribution of electrons in the electron beam. This invention consists of using the axial electrical component of a TEM.sub.10 mode Gaussian beam in vacuum to condition the electron beam and speed up the outer electrons in the beam. The conditioning beam should possess about the same diameter as the electron beam. The beam waist of the conditioning wave must be located around the entrance of the undulator longitudinally to have a net energy exchange between the electrons in the outer part of the distribution and the conditioning wave owing to the natural divergence of a Gaussian beam. By accelerating the outer electrons, the outer and core electrons are caused to stay in phase. This increases the fraction of the electron beam energy that is converted to light thereby improving the efficiency of conversion of energy to light and therefore boosting the power output of the free electron laser and synchrotron.

Inventors:
 [1];  [1]
  1. (Williamsburg, VA)
Issue Date:
Research Org.:
SOUTHEASTERN UNIV RESCH ASSN
OSTI Identifier:
871833
Patent Number(s):
5805620
Assignee:
Southeastern Universities Research Association (Newport News, VA) TJNAF
DOE Contract Number:  
AC05-84ER40150
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
beam; conditioner; free; electron; lasers; synchrotrons; focused; optical; introduce; pulse; electromagnetic; wave; colinearly; laser; synchrotron; adding; axial; field; component; accelerates; electrons; radial; outside; distribution; consists; electrical; 10; mode; gaussian; vacuum; condition; speed; outer; conditioning; possess; diameter; waist; located; entrance; undulator; longitudinally; net; energy; exchange; natural; divergence; accelerating; core; caused; stay; phase; increases; fraction; converted; light; improving; efficiency; conversion; boosting; power; output; magnetic wave; optical pulse; power output; electron beam; electron laser; free electron; beam energy; electromagnetic wave; axial field; net energy; gaussian beam; electron lasers; field component; core electrons; axial electric; focused optical; energy exchange; electrical component; /372/

Citation Formats

Liu, Hongxiu, and Neil, George R. Beam conditioner for free electron lasers and synchrotrons. United States: N. p., 1998. Web.
Liu, Hongxiu, & Neil, George R. Beam conditioner for free electron lasers and synchrotrons. United States.
Liu, Hongxiu, and Neil, George R. Thu . "Beam conditioner for free electron lasers and synchrotrons". United States. https://www.osti.gov/servlets/purl/871833.
@article{osti_871833,
title = {Beam conditioner for free electron lasers and synchrotrons},
author = {Liu, Hongxiu and Neil, George R.},
abstractNote = {A focused optical is been used to introduce an optical pulse, or electromagnetic wave, colinearly with the electron beam in a free electron laser or synchrotron thereby adding an axial field component that accelerates the electrons on the radial outside of the distribution of electrons in the electron beam. This invention consists of using the axial electrical component of a TEM.sub.10 mode Gaussian beam in vacuum to condition the electron beam and speed up the outer electrons in the beam. The conditioning beam should possess about the same diameter as the electron beam. The beam waist of the conditioning wave must be located around the entrance of the undulator longitudinally to have a net energy exchange between the electrons in the outer part of the distribution and the conditioning wave owing to the natural divergence of a Gaussian beam. By accelerating the outer electrons, the outer and core electrons are caused to stay in phase. This increases the fraction of the electron beam energy that is converted to light thereby improving the efficiency of conversion of energy to light and therefore boosting the power output of the free electron laser and synchrotron.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

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