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Title: Method for energy dither of a particle beam

Abstract

A method for varying the wavelength of a free electron laser (FEL) by applying an energy dither to the charged particles supplying the FEL. Bunches of charged particle beams are accelerated by cavities that are operated at a harmonic of the bunch repetition rate. The method involves adding one or more secondary radiofrequency accelerator cavities after the primary beam transport and near the wiggler to apply a fluctuation between individual bunches with a pseudo-random distribution. The secondary radiofrequency accelerator cavities provide fine variations of the beam energy about a nominal operating point. Operating a free electron laser (FEL) with a 1% change in the electron beam energy via the added secondary cavities will result in a 2% wavelength variation of the FEL output.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1600311
Patent Number(s):
10483712
Application Number:
16/292,474
Assignee:
Jefferson Science Associates, LLC (Newport News, VA)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Patent
Resource Relation:
Patent File Date: 03/05/2019
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Powers, Thomas Joseph, Douglas, David R., Evtushenko, Pavel, Benson, Stephen V., and Neil, George. Method for energy dither of a particle beam. United States: N. p., 2019. Web.
Powers, Thomas Joseph, Douglas, David R., Evtushenko, Pavel, Benson, Stephen V., & Neil, George. Method for energy dither of a particle beam. United States.
Powers, Thomas Joseph, Douglas, David R., Evtushenko, Pavel, Benson, Stephen V., and Neil, George. Tue . "Method for energy dither of a particle beam". United States. https://www.osti.gov/servlets/purl/1600311.
@article{osti_1600311,
title = {Method for energy dither of a particle beam},
author = {Powers, Thomas Joseph and Douglas, David R. and Evtushenko, Pavel and Benson, Stephen V. and Neil, George},
abstractNote = {A method for varying the wavelength of a free electron laser (FEL) by applying an energy dither to the charged particles supplying the FEL. Bunches of charged particle beams are accelerated by cavities that are operated at a harmonic of the bunch repetition rate. The method involves adding one or more secondary radiofrequency accelerator cavities after the primary beam transport and near the wiggler to apply a fluctuation between individual bunches with a pseudo-random distribution. The secondary radiofrequency accelerator cavities provide fine variations of the beam energy about a nominal operating point. Operating a free electron laser (FEL) with a 1% change in the electron beam energy via the added secondary cavities will result in a 2% wavelength variation of the FEL output.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}

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Works referenced in this record:

Free-electron laser
patent, February 1989