FEL2015 - Table of Session: MOB (FEL Prize Talks)

Paper	Title	Page
MOB01	Three-Plus Decades of Tapered Undulator FEL Physics	5
	W.M. Fawley Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy W.M. Fawley SLAC, Menlo Park, California, USA
	Beginning with the classic 1981 work of Kroll-Morton-Rosenbluth (), multiple generations of FEL scientists have studied and used experimentally undulator tapering to improve and optimize the radiation output of both amplifier and oscillator FELs. Tapering has undergone a renaissance of interest, in part to make possible TW instantaneous power levels from x-ray FELs. In this talk, I will give a highly personalized (and undoubtedly strongly biased) historical survey of tapering studies beginning with the ELF 35-GHz experiments at Livermore in the mid-1980's and continuing up to quite recent studies at the LCLS at both soft and hard x-ray wavelengths. () N.M. Kroll, P.L. Morton, and M.N. Rosenbluth, IEEE J. Quantum Elec., QE-17, 1436 (1981).
	Slides MOB01 [2.106 MB]
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MOB02	X-Ray FEL R&D: Brighter, Better and Cheaper	7
	Z. Huang SLAC, Menlo Park, California, USA
	The X-ray free-electron lasers (FELs), with nine to ten orders of magnitude improvement in peak brightness over the third-generation light sources, have demonstrated remarkable scientific capabilities. Despite the early success, X-ray FELs can still undergo dramatic transformations with accelerator and FEL R&D. In this talk, I will show examples of recent R&D efforts to increase X-ray coherence and brightness, to obtain better control of X-ray temporal and spectral properties, and to develop concepts for compact coherent sources.
	Slides MOB02 [18.004 MB]
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MOB03	Transforming the FEL: Coherence, Complex Structures, and Exotic Beams	10
	E. Hemsing SLAC, Menlo Park, California, USA
	Modern high brightness electron beams used in FELs are extremely versatile and highly malleable. This flexibility can be used to precisely tailor the properties of the FEL light for improved temporal coherence (as in external seeding), but can also be exploited in new ways to generate exotic FEL modes of twisted light that carry orbital angular momentum (OAM) for new science. In this talk, I will describe how lasers and undulator harmonics can be combined to produce both simple and complex e-beam distributions that emit intense, coherent, and highly tunable OAM light in future FELs.
	Slides MOB03 [12.208 MB]
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Paper

Title

Page

Three-Plus Decades of Tapered Undulator FEL Physics

5

W.M. Fawley
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
W.M. Fawley
SLAC, Menlo Park, California, USA

Beginning with the classic 1981 work of Kroll-Morton-Rosenbluth (*), multiple generations of FEL scientists have studied and used experimentally undulator tapering to improve and optimize the radiation output of both amplifier and oscillator FELs. Tapering has undergone a renaissance of interest, in part to make possible TW instantaneous power levels from x-ray FELs. In this talk, I will give a highly personalized (and undoubtedly strongly biased) historical survey of tapering studies beginning with the ELF 35-GHz experiments at Livermore in the mid-1980's and continuing up to quite recent studies at the LCLS at both soft and hard x-ray wavelengths.
(*) N.M. Kroll, P.L. Morton, and M.N. Rosenbluth, IEEE J. Quantum Elec., QE-17, 1436 (1981).

Slides MOB01 [2.106 MB]

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MOB02

X-Ray FEL R&D: Brighter, Better and Cheaper

7

Z. Huang
SLAC, Menlo Park, California, USA

The X-ray free-electron lasers (FELs), with nine to ten orders of magnitude improvement in peak brightness over the third-generation light sources, have demonstrated remarkable scientific capabilities. Despite the early success, X-ray FELs can still undergo dramatic transformations with accelerator and FEL R&D. In this talk, I will show examples of recent R&D efforts to increase X-ray coherence and brightness, to obtain better control of X-ray temporal and spectral properties, and to develop concepts for compact coherent sources.

Slides MOB02 [18.004 MB]

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MOB03

Transforming the FEL: Coherence, Complex Structures, and Exotic Beams

10

E. Hemsing
SLAC, Menlo Park, California, USA

Modern high brightness electron beams used in FELs are extremely versatile and highly malleable. This flexibility can be used to precisely tailor the properties of the FEL light for improved temporal coherence (as in external seeding), but can also be exploited in new ways to generate exotic FEL modes of twisted light that carry orbital angular momentum (OAM) for new science. In this talk, I will describe how lasers and undulator harmonics can be combined to produce both simple and complex e-beam distributions that emit intense, coherent, and highly tunable OAM light in future FELs.

Slides MOB03 [12.208 MB]

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reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)