Time-of-flight electron energy loss spectroscopy by longitudinal phase space manipulation with microwave cavities

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Uittreksel

The possibility to perform high-resolution time-resolved electron energy loss spectroscopy has the potential to impact a broad range of research fields. Resolving small energy losses with ultrashort electron pulses, however, is an enormous challenge due to the low average brightness of a pulsed beam. In this paper, we propose to use time-of-flight measurements combined with longitudinal phase space manipulation using resonant microwave cavities. This allows for both an accurate detection of energy losses with a high current throughput and efficient monochromation. First, a proof-of-principle experiment is presented, showing that with the incorporation of a compression cavity the flight time resolution can be improved significantly. Then, it is shown through simulations that by adding a cavity-based monochromation technique, a full-width-at-half-maximum energy resolution of 22 meV can be achieved with 3.1 ps pulses at a beam energy of 30 keV with currently available technology. By combining state-of-the-art energy resolutions with a pulsed electron beam, the technique proposed here opens up the way to detecting short-lived excitations within the regime of highly collective physics.

TaalEngels
Artikelnummer051101
Aantal pagina's8
TijdschriftStructural Dynamics
Volume5
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 1 sep 2018

Vingerafdruk

Electron energy loss spectroscopy
manipulators
Energy dissipation
energy dissipation
Microwaves
electron energy
microwaves
cavities
Full width at half maximum
spectroscopy
flight time
Luminance
Electron beams
Physics
Throughput
pulses
high current
energy
Electrons
brightness

Citeer dit

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title = "Time-of-flight electron energy loss spectroscopy by longitudinal phase space manipulation with microwave cavities",
abstract = "The possibility to perform high-resolution time-resolved electron energy loss spectroscopy has the potential to impact a broad range of research fields. Resolving small energy losses with ultrashort electron pulses, however, is an enormous challenge due to the low average brightness of a pulsed beam. In this paper, we propose to use time-of-flight measurements combined with longitudinal phase space manipulation using resonant microwave cavities. This allows for both an accurate detection of energy losses with a high current throughput and efficient monochromation. First, a proof-of-principle experiment is presented, showing that with the incorporation of a compression cavity the flight time resolution can be improved significantly. Then, it is shown through simulations that by adding a cavity-based monochromation technique, a full-width-at-half-maximum energy resolution of 22 meV can be achieved with 3.1 ps pulses at a beam energy of 30 keV with currently available technology. By combining state-of-the-art energy resolutions with a pulsed electron beam, the technique proposed here opens up the way to detecting short-lived excitations within the regime of highly collective physics.",
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Time-of-flight electron energy loss spectroscopy by longitudinal phase space manipulation with microwave cavities. / Verhoeven, W.; van Rens, J.F.M.; Toonen, W.F.; Kieft, E.R.; Mutsaers, P.H.A.; Luiten, O.J.

In: Structural Dynamics, Vol. 5, Nr. 5, 051101, 01.09.2018.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

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