Beam conditioner for free electron lasers and synchrotrons

Patent · Thu Jan 01 00:00:00 EST 1998

OSTI ID:871833

Liu, Hongxiu ^[1]; Neil, George R ^[1]

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1. Williamsburg, VA

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.

• Research Organization: Southeastern Universities Research Associations (SURA), Washington, DC (United States)
• DOE Contract Number: AC05-84ER40150
• Assignee: Southeastern Universities Research Association (Newport News, VA)
• Patent Number(s): US 5805620
• OSTI ID: 871833
• Country of Publication: United States
• Language: English

Related Subjects

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
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