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Title: FEL system with homogeneous average output

Abstract

A method of varying the output of a free electron laser (FEL) on very short time scales to produce a slightly broader, but smooth, time-averaged wavelength spectrum. The method includes injecting into an accelerator a sequence of bunch trains at phase offsets from crest. Accelerating the particles to full energy to result in distinct and independently controlled, by the choice of phase offset, phase-energy correlations or chirps on each bunch train. The earlier trains will be more strongly chirped, the later trains less chirped. For an energy recovered linac (ERL), the beam may be recirculated using a transport system with linear and nonlinear momentum compactions M.sub.56, which are selected to compress all three bunch trains at the FEL with higher order terms managed.

Inventors:
; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1417315
Patent Number(s):
9,871,337
Application Number:
14/708,259
Assignee:
JEFFERSON SCIENCE ASSOCIATES, LLC (Newport News, VA) TJNAF
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 May 10
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Douglas, David R., Legg, Robert, Whitney, R. Roy, Neil, George, and Powers, Thomas Joseph. FEL system with homogeneous average output. United States: N. p., 2018. Web.
Douglas, David R., Legg, Robert, Whitney, R. Roy, Neil, George, & Powers, Thomas Joseph. FEL system with homogeneous average output. United States.
Douglas, David R., Legg, Robert, Whitney, R. Roy, Neil, George, and Powers, Thomas Joseph. Tue . "FEL system with homogeneous average output". United States. https://www.osti.gov/servlets/purl/1417315.
@article{osti_1417315,
title = {FEL system with homogeneous average output},
author = {Douglas, David R. and Legg, Robert and Whitney, R. Roy and Neil, George and Powers, Thomas Joseph},
abstractNote = {A method of varying the output of a free electron laser (FEL) on very short time scales to produce a slightly broader, but smooth, time-averaged wavelength spectrum. The method includes injecting into an accelerator a sequence of bunch trains at phase offsets from crest. Accelerating the particles to full energy to result in distinct and independently controlled, by the choice of phase offset, phase-energy correlations or chirps on each bunch train. The earlier trains will be more strongly chirped, the later trains less chirped. For an energy recovered linac (ERL), the beam may be recirculated using a transport system with linear and nonlinear momentum compactions M.sub.56, which are selected to compress all three bunch trains at the FEL with higher order terms managed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {1}
}

Patent:

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Works referenced in this record:

Multiple-beam free-electron lasers
journal, July 2003

  • Freund, H. P.; Douglas, D.; O’Shea, P. G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 507, Issue 1-2, p. 373-377
  • DOI: 10.1016/S0168-9002(03)00947-1