Photo-triggered pulsed cavity compressor for bright electron bunches in ultrafast electron diffraction

Kassier, Günther; Erasmus, N.; Haupt, K.; Boshoff, Ilana; Siegmund, R.; Coelho, Sergio M.M.; Schwoerer, H.

doi:10.1007/s00340-012-5207-2

Cited by 31 publications

(21 citation statements)

References 22 publications

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“…Several noteworthy features of the pulse compression scheme are evident from (13), (15), (17) and (19): 1. At the lowest order, net velocity change is independent of pulse duration parameter ξ 0 and pulse shape g.…”

Section: Theorymentioning

confidence: 99%

“…This demonstrates the ability of the proposed scheme to focus ultrashort electron pulses without inducing temporal resolution-limiting distortions in them. The − Uw 0 4 dependence in (13) and (17) implies that significant energy savings are possible with tighter focusing. Decreasing the beam waist radius, however, enhances higher-order distortions that limit the maximum achievable compression.…”

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confidence: 99%

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All-Optical, Three-Dimensional Electron Pulse Compression

et al. 2015

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We propose an all-optical, three-dimensional electron pulse compression scheme in which HermiteGaussian optical modes are used to fashion a three-dimensional optical trap in the electron pulse's rest frame. We show that the correct choices of optical incidence angles are necessary for optimal compression. We obtain analytical expressions for the net impulse imparted by Hermite-Gaussian freespace modes of arbitrary order. Although we focus on electrons, our theory applies to any charged particle and any particle with non-zero polarizability in the Rayleigh regime. We verify our theory numerically using exact solutions to Maxwell's equations for first-order Hermite-Gaussian beams, demonstrating single-electron pulse compression factors of >10 2 in both longitudinal and transverse dimensions with experimentally realizable optical pulses. The proposed scheme is useful in ultrafast electron imaging for both single-and multi-electron pulse compression, and as a means of circumventing temporal distortions in magnetic lenses when focusing ultrashort electron pulses. Other applications include the creation of flat electron beams and ultrashort electron bunches for coherent terahertz emission.

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Section: Theorymentioning

confidence: 99%

mentioning

confidence: 99%

All-Optical, Three-Dimensional Electron Pulse Compression

et al. 2015

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“…Nevertheless, with accurately timed, phase-locked laser pulses and appropriate spectral compression methods, e.g., by RF-cavities [138,148,218] an optical field emission electron gun could in principle lead to enhanced temporal resolution at low electron energies. A main drawback of such an electron source would be the limited repetition rate within a pump / probe scheme.…”

Section: Optical Field Emission Electron Gunmentioning

confidence: 99%

Development of an Ultrafast Low-Energy Electron Diffraction Setup

Gulde

2015

Springer Theses

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“…15,16 It has been shown that highly charged photo-emitted electron pulses can be compressed to femtosecond duration using an RF cavity buncher. [15][16][17] These electron pulses have been used in tabletop setups to capture ultrafast induced dynamics in condensed matter. 18,19 In all cases, it is essential to accurately measure the duration of the electron pulses on target, as well as the arrival time of the electron pulses relative to the laser pulses.…”

Section: Introductionmentioning

confidence: 99%

Implementation and modeling of a femtosecond laser-activated streak camera

Zandi

Wilkin

Centurion

2017

Review of Scientific Instruments

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A laser-activated streak camera was built to measure the duration of femtosecond electron pulses. The streak velocity of the device is 1.89 mrad/ps, which corresponds to a sensitivity of 34.9 fs/pixels. The streak camera also measures changes in the relative time of arrival between the laser and electron pulses with a resolution of 70 fs RMS. A full circuit analysis of the structure is presented to describe the streaking field and the general behavior of the device. We have developed a general mathematical model to analyze the streaked images. The model provides an accurate method to extract the pulse duration based on the changes of the electron beam profile when the streaking field is applied. Published by AIP Publishing. [http://dx

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Photo-triggered pulsed cavity compressor for bright electron bunches in ultrafast electron diffraction

Cited by 31 publications

References 22 publications

All-Optical, Three-Dimensional Electron Pulse Compression

All-Optical, Three-Dimensional Electron Pulse Compression

Development of an Ultrafast Low-Energy Electron Diffraction Setup

Implementation and modeling of a femtosecond laser-activated streak camera

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