Coherent science at the SwissFEL x-ray laser

Pàtterson, B. D.; Abela, R.; Braun, Hans-Heinrich; Flechsig, U.; Ganter, R.; Kim, Y.; Kirk, E.; Oppelt, A.; Pedrozzi, M.; Reiche, S.; Rivkin, Leonid; Schmidt, Th.; Schmitt, B.; Strocov, Vladimir N.; Tsujino, S.; Wrulich, A.

doi:10.1088/1367-2630/12/3/035012

Cited by 135 publications

(90 citation statements)

References 27 publications

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“…Research on field emitter arrays (FEAs) has been actively pursued [1][2][3][4][5][6][7][8][9][10][11][12][13] with the aim of realizing high current and high current density cathodes, e.g., for compact microwave vacuum electronic amplifiers, such as traveling wave tubes (TWTs) [14][15][16][17] and compact free electron lasers. 7,18 FEAs are expected to help simplify the gun design and extend the operation range of such TWTs.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of metallic double-gate field emitter arrays and their electron beam collimation characteristics

Helfenstein¹,

Jefimovs²,

Kirk³

et al. 2012

Journal of Applied Physics

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The fabrication of double-gate metallic field emitter arrays with large collimation gate apertures and their field emission beam characteristics are reported. The device fabrication steps, including the molding technique for array fabrication, the electron extraction gate fabrication by the self-aligned resist etch-back method, and the fabrication of the collimation gate electrode using a focused ion beam assisted method are described in detail. The experimental results of 2 × 2 tip arrays with the proposed double-gate structure demonstrate an order of magnitude enhancement in beam brightness with minimal current loss.

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Section: Introductionmentioning

confidence: 99%

“…7,18 FEAs are expected to help simplify the gun design and extend the operation range of such TWTs. 1,15 A recent report on a 5 GHz TWT using a single-gate Spindt FEA with 100 W output 17 demonstrates the practical feasibility of FEA-based TWTs.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of metallic double-gate field emitter arrays and their electron beam collimation characteristics

Helfenstein¹,

Jefimovs²,

Kirk³

et al. 2012

Journal of Applied Physics

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“…The results show that the proposed double-gate field emission cathodes are promising for high current and high brightness electron beam applications such as free-electron lasers and THz power devices. The extremely high brightness of field emission electron beams has enabled the realization of electron microscopes with single-atom resolution 1 and has stimulated high current and high current density applications such as free-electron lasers 2,3 and THz vacuum electronic devices. [4][5][6][7] Field emitters can produce high brightness electron beams via quantum tunneling by applying a strong electric field in the order of GV/m to solid surfaces.…”

mentioning

confidence: 99%

Electron beam collimation with a 40 000 tip metallic double-gate field emitter array and in-situ control of nanotip sharpness distribution

Helfenstein

Guzenko

Fink

et al. 2013

Journal of Applied Physics

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Electron beam collimation with a 40 000 tip metallic double-gate field emitter array and in-situ control of nanotip sharpness distributionHelfenstein, P; Guzenko, V A; Fink, H W; Tsujino, S Abstract: The generation of highly collimated electron beams from a double-gate field emitter array with 40000 metallic tips and large collimation gate apertures is reported. Field emission beam measurements demonstrated the reduction of the beam envelope down to the array size by applying a negative potential to the on-chip gate electrode for the collimation of individual field emission beamlets. Owing to the optimized gate structure, the concomitant decrease of the emission current was minimal, leading to a net enhancement of the current density. Furthermore, a noble gas conditioning process was successfully applied to the double-gate device to improve the beam uniformity in-situ with orders of magnitude increase of the active emission area. The results show that the proposed double-gate field emission cathodes are promising for high current and high brightness electron beam applications such as free-electron lasers and THz power devices.

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“…Future hard x-ray FEL facility either have been proposed or are under construction [1][2][3]. The first successful single pass SASE FEL at 32 nm with a pulse duration of 25 femtosecond FWHM has been reported in 2006 [4].…”

Section: Introductionmentioning

confidence: 99%

Attosecond X-ray free electron laser

Kumar

Kang

Kim

2013

EPJ Web of Conferences

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Abstract. For a real, meaningful pump-probe experiment with attosecond temporal resolution, an isolated attosecond pulse is in demand. In this vein we report the generation of an isolated ~ 148 attosecond pulse duration radiation pulse at 0.1 angstrom wavelength using current enhanced self-amplified spontaneous emission free electron laser. We consider the 10-GeV PAL-XFEL e-beam for enhanced self-amplified spontaneous emission (ESASE) scheme. In ESASE, X-ray SASE FEL is combined with a femtosecond laser system. An 800 nm wavelength, 5 fs FWHM carrier envelope phase stabilized laser was employed in ESASE scheme.

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Coherent science at the SwissFEL x-ray laser

Cited by 135 publications

References 27 publications

Fabrication of metallic double-gate field emitter arrays and their electron beam collimation characteristics

Fabrication of metallic double-gate field emitter arrays and their electron beam collimation characteristics

Electron beam collimation with a 40 000 tip metallic double-gate field emitter array and in-situ control of nanotip sharpness distribution

Attosecond X-ray free electron laser

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