Model-Based Optimization of Tapered Free-Electron Lasers
Mak, Alan LU ; Curbis, Francesca LU
and Werin, Sverker
LU
(2015)
In Physical Review Special Topics - Accelerators and Beams
18(4).
- Abstract
- The energy extraction efficiency is a figure of merit for a free-electron laser (FEL). It can be enhanced by the technique of undulator tapering, which enables the sustained growth of radiation power beyond the initial saturation point. In the development of a single-pass x-ray FEL, it is important to exploit the full potential of this technique and optimize the taper profile aw(z). Our approach to the optimization is based on the theoretical model by Kroll, Morton, and Rosenbluth, whereby the taper profile aw(z) is not a predetermined function (such as linear or exponential) but is determined by the physics of a resonant particle. For further enhancement of the energy extraction efficiency, we propose a modification to the model, which... (More)
- The energy extraction efficiency is a figure of merit for a free-electron laser (FEL). It can be enhanced by the technique of undulator tapering, which enables the sustained growth of radiation power beyond the initial saturation point. In the development of a single-pass x-ray FEL, it is important to exploit the full potential of this technique and optimize the taper profile aw(z). Our approach to the optimization is based on the theoretical model by Kroll, Morton, and Rosenbluth, whereby the taper profile aw(z) is not a predetermined function (such as linear or exponential) but is determined by the physics of a resonant particle. For further enhancement of the energy extraction efficiency, we propose a modification to the model, which involves manipulations of the resonant particle’s phase. Using the numerical simulation code GENESIS, we apply our model-based optimization methods to a case of the future FEL at the MAX IV Laboratory (Lund, Sweden), as well as a case of the LCLS-II facility (Stanford, USA). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5323062
- author
- Mak, Alan
LU
; Curbis, Francesca
LU
and Werin, Sverker
LU
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Special Topics - Accelerators and Beams
- volume
- 18
- issue
- 4
- article number
- 040702
- publisher
- American Physical Society
- external identifiers
-
- wos:000353330400001
- scopus:84929376713
- ISSN
- 1098-4402
- DOI
- 10.1103/PhysRevSTAB.18.040702
- language
- English
- LU publication?
- yes
- id
- 45be4cdc-1478-4d62-b284-ccfd29a53dbf (old id 5323062)
- alternative location
- http://journals.aps.org/prstab/abstract/10.1103/PhysRevSTAB.18.040702
- date added to LUP
- 2016-04-01 14:41:37
- date last changed
- 2022-03-06 20:41:03
@article{45be4cdc-1478-4d62-b284-ccfd29a53dbf,
abstract = {{The energy extraction efficiency is a figure of merit for a free-electron laser (FEL). It can be enhanced by the technique of undulator tapering, which enables the sustained growth of radiation power beyond the initial saturation point. In the development of a single-pass x-ray FEL, it is important to exploit the full potential of this technique and optimize the taper profile aw(z). Our approach to the optimization is based on the theoretical model by Kroll, Morton, and Rosenbluth, whereby the taper profile aw(z) is not a predetermined function (such as linear or exponential) but is determined by the physics of a resonant particle. For further enhancement of the energy extraction efficiency, we propose a modification to the model, which involves manipulations of the resonant particle’s phase. Using the numerical simulation code GENESIS, we apply our model-based optimization methods to a case of the future FEL at the MAX IV Laboratory (Lund, Sweden), as well as a case of the LCLS-II facility (Stanford, USA).}},
author = {{Mak, Alan and Curbis, Francesca and Werin, Sverker}},
issn = {{1098-4402}},
language = {{eng}},
number = {{4}},
publisher = {{American Physical Society}},
series = {{Physical Review Special Topics - Accelerators and Beams}},
title = {{Model-Based Optimization of Tapered Free-Electron Lasers}},
url = {{http://dx.doi.org/10.1103/PhysRevSTAB.18.040702}},
doi = {{10.1103/PhysRevSTAB.18.040702}},
volume = {{18}},
year = {{2015}},
}