Review of coherent SASE schemes

Lawrence Campbell, David Dunning, James Robert Henderson, Brian McNeil, Neil Thompson

Research output: Contribution to conferencePaper

1 Citation (Scopus)
213 Downloads (Pure)

Abstract

A review of some methods that have recently been proposed to improve the temporal coherence of SASE output is presented. These methods do not require any external laser seed field, or the use of the so-called self-seeding methods, where the SASE radiation is optically filtered and improved at an early stage of the interaction before re-injection and amplification to saturation. By using methods that introduce an additional relative propagation between the electron beam and the radiation field, the localised collective interaction, which leads to the formation of the ‘spiking’ associated with normal SASE output, is removed. The result is output pulses which are close to the fourier transform limit without the need for any external seeds or intermediate optics.

We acknowledge STFC MoA 4132361; ARCHIE-WeSt HPC, EPSRC grant EP/K000586/1; John von Neumann Institute for Computing (NIC) on JUROPA at Julich Supercomputing Centre (JSC), under project HHH20.
Original languageEnglish
Publication statusPublished - Aug 2014
Event36th International Free Electron Laser Conference - Basel, Switzerland
Duration: 25 Aug 201429 Aug 2014

Conference

Conference36th International Free Electron Laser Conference
Abbreviated titleFEL 2014
CountrySwitzerland
CityBasel
Period25/08/1429/08/14

Fingerprint

Seed
Radiation
seeds
output
Amplification
Electron beams
Optics
spiking
Fourier transforms
inoculation
radiation distribution
Lasers
interactions
optics
electron beams
injection
saturation
propagation
radiation
pulses

Keywords

  • free-electron laser
  • SASE schemes
  • FEL
  • self-amplified stimulated emission

Cite this

Campbell, L., Dunning, D., Henderson, J. R., McNeil, B., & Thompson, N. (2014). Review of coherent SASE schemes. Paper presented at 36th International Free Electron Laser Conference, Basel, Switzerland.
Campbell, Lawrence ; Dunning, David ; Henderson, James Robert ; McNeil, Brian ; Thompson, Neil. / Review of coherent SASE schemes. Paper presented at 36th International Free Electron Laser Conference, Basel, Switzerland.
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abstract = "A review of some methods that have recently been proposed to improve the temporal coherence of SASE output is presented. These methods do not require any external laser seed field, or the use of the so-called self-seeding methods, where the SASE radiation is optically filtered and improved at an early stage of the interaction before re-injection and amplification to saturation. By using methods that introduce an additional relative propagation between the electron beam and the radiation field, the localised collective interaction, which leads to the formation of the ‘spiking’ associated with normal SASE output, is removed. The result is output pulses which are close to the fourier transform limit without the need for any external seeds or intermediate optics. We acknowledge STFC MoA 4132361; ARCHIE-WeSt HPC, EPSRC grant EP/K000586/1; John von Neumann Institute for Computing (NIC) on JUROPA at Julich Supercomputing Centre (JSC), under project HHH20.",
keywords = "free-electron laser, SASE schemes, FEL, self-amplified stimulated emission",
author = "Lawrence Campbell and David Dunning and Henderson, {James Robert} and Brian McNeil and Neil Thompson",
note = "Presented at FEL 2014 by Brian McNeil.; 36th International Free Electron Laser Conference, FEL 2014 ; Conference date: 25-08-2014 Through 29-08-2014",
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Campbell, L, Dunning, D, Henderson, JR, McNeil, B & Thompson, N 2014, 'Review of coherent SASE schemes' Paper presented at 36th International Free Electron Laser Conference, Basel, Switzerland, 25/08/14 - 29/08/14, .

Review of coherent SASE schemes. / Campbell, Lawrence; Dunning, David; Henderson, James Robert; McNeil, Brian; Thompson, Neil.

2014. Paper presented at 36th International Free Electron Laser Conference, Basel, Switzerland.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Review of coherent SASE schemes

AU - Campbell, Lawrence

AU - Dunning, David

AU - Henderson, James Robert

AU - McNeil, Brian

AU - Thompson, Neil

N1 - Presented at FEL 2014 by Brian McNeil.

PY - 2014/8

Y1 - 2014/8

N2 - A review of some methods that have recently been proposed to improve the temporal coherence of SASE output is presented. These methods do not require any external laser seed field, or the use of the so-called self-seeding methods, where the SASE radiation is optically filtered and improved at an early stage of the interaction before re-injection and amplification to saturation. By using methods that introduce an additional relative propagation between the electron beam and the radiation field, the localised collective interaction, which leads to the formation of the ‘spiking’ associated with normal SASE output, is removed. The result is output pulses which are close to the fourier transform limit without the need for any external seeds or intermediate optics. We acknowledge STFC MoA 4132361; ARCHIE-WeSt HPC, EPSRC grant EP/K000586/1; John von Neumann Institute for Computing (NIC) on JUROPA at Julich Supercomputing Centre (JSC), under project HHH20.

AB - A review of some methods that have recently been proposed to improve the temporal coherence of SASE output is presented. These methods do not require any external laser seed field, or the use of the so-called self-seeding methods, where the SASE radiation is optically filtered and improved at an early stage of the interaction before re-injection and amplification to saturation. By using methods that introduce an additional relative propagation between the electron beam and the radiation field, the localised collective interaction, which leads to the formation of the ‘spiking’ associated with normal SASE output, is removed. The result is output pulses which are close to the fourier transform limit without the need for any external seeds or intermediate optics. We acknowledge STFC MoA 4132361; ARCHIE-WeSt HPC, EPSRC grant EP/K000586/1; John von Neumann Institute for Computing (NIC) on JUROPA at Julich Supercomputing Centre (JSC), under project HHH20.

KW - free-electron laser

KW - SASE schemes

KW - FEL

KW - self-amplified stimulated emission

UR - http://www.fel2014.ch/

M3 - Paper

ER -

Campbell L, Dunning D, Henderson JR, McNeil B, Thompson N. Review of coherent SASE schemes. 2014. Paper presented at 36th International Free Electron Laser Conference, Basel, Switzerland.