Transform-limited X-ray pulse generation from a high-brightness self-amplified spontaneous-emission free-electron laser

Brian McNeil, Neil Thompson, David Dunning

Research output: Contribution to journalLetter

42 Citations (Scopus)

Abstract

A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The method uses repeated nonequal electron beam delays to delocalize the collective FEL interaction and break the radiation coherence length dependence on the FEL cooperation length. The method requires no external seeding or photon optics and so is applicable at any wavelength or repetition rate. It is demonstrated, using linear theory and numerical simulations, that the radiation coherence length can be increased by approximately 2 orders of magnitude over SASE with a corresponding increase in spectral brightness. Examples are shown of HB-SASE generating transform-limited FEL pulses in the soft x-ray and near transform-limited pulses in the hard x-ray. Such pulses may greatly benefit existing applications and may also open up new areas of scientific research.
LanguageEnglish
Article number134802
Number of pages5
JournalPhysical Review Letters
Volume110
Issue number13
DOIs
Publication statusPublished - 26 Mar 2013

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free electron lasers
spontaneous emission
brightness
pulses
x rays
radiation
inoculation
repetition
optics
electron beams
photons
wavelengths
simulation
interactions

Keywords

  • X-ray
  • self amplified laser
  • emission free-electron laser

Cite this

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title = "Transform-limited X-ray pulse generation from a high-brightness self-amplified spontaneous-emission free-electron laser",
abstract = "A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The method uses repeated nonequal electron beam delays to delocalize the collective FEL interaction and break the radiation coherence length dependence on the FEL cooperation length. The method requires no external seeding or photon optics and so is applicable at any wavelength or repetition rate. It is demonstrated, using linear theory and numerical simulations, that the radiation coherence length can be increased by approximately 2 orders of magnitude over SASE with a corresponding increase in spectral brightness. Examples are shown of HB-SASE generating transform-limited FEL pulses in the soft x-ray and near transform-limited pulses in the hard x-ray. Such pulses may greatly benefit existing applications and may also open up new areas of scientific research.",
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Transform-limited X-ray pulse generation from a high-brightness self-amplified spontaneous-emission free-electron laser. / McNeil, Brian; Thompson, Neil; Dunning, David.

In: Physical Review Letters, Vol. 110, No. 13, 134802, 26.03.2013.

Research output: Contribution to journalLetter

TY - JOUR

T1 - Transform-limited X-ray pulse generation from a high-brightness self-amplified spontaneous-emission free-electron laser

AU - McNeil, Brian

AU - Thompson, Neil

AU - Dunning, David

PY - 2013/3/26

Y1 - 2013/3/26

N2 - A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The method uses repeated nonequal electron beam delays to delocalize the collective FEL interaction and break the radiation coherence length dependence on the FEL cooperation length. The method requires no external seeding or photon optics and so is applicable at any wavelength or repetition rate. It is demonstrated, using linear theory and numerical simulations, that the radiation coherence length can be increased by approximately 2 orders of magnitude over SASE with a corresponding increase in spectral brightness. Examples are shown of HB-SASE generating transform-limited FEL pulses in the soft x-ray and near transform-limited pulses in the hard x-ray. Such pulses may greatly benefit existing applications and may also open up new areas of scientific research.

AB - A method to achieve high-brightness self-amplified spontaneous emission (HB-SASE) in the free-electron laser (FEL) is described. The method uses repeated nonequal electron beam delays to delocalize the collective FEL interaction and break the radiation coherence length dependence on the FEL cooperation length. The method requires no external seeding or photon optics and so is applicable at any wavelength or repetition rate. It is demonstrated, using linear theory and numerical simulations, that the radiation coherence length can be increased by approximately 2 orders of magnitude over SASE with a corresponding increase in spectral brightness. Examples are shown of HB-SASE generating transform-limited FEL pulses in the soft x-ray and near transform-limited pulses in the hard x-ray. Such pulses may greatly benefit existing applications and may also open up new areas of scientific research.

KW - X-ray

KW - self amplified laser

KW - emission free-electron laser

UR - http://prl.aps.org/abstract/PRL/v110/i13/e134802

U2 - 10.1103/PhysRevLett.110.134802

DO - 10.1103/PhysRevLett.110.134802

M3 - Letter

VL - 110

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 13

M1 - 134802

ER -