Electro-optical measurement of sub-ps structures in low charge electron bunches

Müller, F.; Peier, Peter; Schlott, V.; Steffen, B.; Feurer, Thomas; Kuske, P.

doi:10.1103/physrevstab.15.070701

Cited by 26 publications

(21 citation statements)

References 12 publications

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“…Electro-optic technique [33][34][35][36], transverse deflecting cavity [37] can be employed to measure the separation of the electron pulses. Here we only analyze the case with a deflecting cavity, which is employed in our experiment in the following section.…”

Section: B Analysis Of Time Resolutionmentioning

confidence: 99%

High time resolution beam-based measurement of the rf-to-laser jitter in a photocathode rf gun

Zhang

Liu

et al. 2014

Phys. Rev. ST Accel. Beams

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Characterizing the rf-to-laser jitter in the photocathode rf gun and its possible origins is important for improving the synchronization and beam quality of the linac based on the photocathode rf gun. A new method based on the rf compression effect in the photocathode rf gun is proposed to measure the rf-to-laser jitter in the gun. By taking advantage of the correlation between the rf compression and the laser injection phase, the error caused by the jitter of the accelerating field in the gun is minimized and thus 10 fs time resolution is expected. Experimental demonstration at the Tsinghua Thomson scattering x-ray source with a time resolution better than 35 fs is reported in this paper. The experimental results are successfully used to obtain information on the possible cause of the jitter and the accompanying drifts.

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Section: B Analysis Of Time Resolutionmentioning

confidence: 99%

High time resolution beam-based measurement of the rf-to-laser jitter in a photocathode rf gun

Zhang

Liu

et al. 2014

Phys. Rev. ST Accel. Beams

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“…The crystal can be moved towards the electron beam orbit and was placed -for the data shownat a distance of ≈ 4 mm from the electron bunch. The quarter-wave plate and half-wave plate (see Figure 3) are adjusted so that the system is operated near extinc-tion [29,49], in order to obtain high sensitivity. The light exiting the low-power port of the beam-splitter is injected in a single-mode fiber and transported back for analysis in the remote photonic analysis station (placed outside of the storage ring shielding).…”

Section: Near-field Electro-optic Sampling Setupmentioning

confidence: 99%

From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer

Bielawski¹,

Blomley²,

Brosi³

et al. 2019

Sci Rep

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In recent and future synchrotron radiation facilities, relativistic electron bunches with increasingly high charge density are needed for producing brilliant light at various wavelengths, from X-rays to terahertz. In such conditions, interaction of electron bunches with their own emitted electromagnetic fields leads to instabilities and spontaneous formation of complex spatial structures. Understanding these instabilities is therefore key in most electron accelerators. However, investigations suffer from the lack of non-destructive recording tools for electron bunch shapes. In storage rings, most studies thus focus on the resulting emitted radiation. Here, we present measurements of the electric field in the immediate vicinity of the electron bunch in a storage ring, over many turns. For recording the ultrafast electric field, we designed a photonic time-stretch analog-to-digital converter with terasamples/second acquisition rate. We could thus observe the predicted link between spontaneous pattern formation and giant bursts of coherent synchrotron radiation in a storage ring.

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“…This also concerns FEL projects based on high repetition rate LINACs 3,4 and Energy Recovery LINACs (ERLs). 2 In part of the existing setups, the principle is to convert the unknown pulse shape into a longitudinal laser pulse modulation, [5][6][7] or a transverse profile. 8,9 If the laser pulse is chirped, then a single-shot optical spectrum analyzer can provide the pulse shape information.…”

Section: Introductionmentioning

confidence: 99%

“…This method is particularly efficient for single-shot bunch shape monitoring. [5][6][7] However the extension of these methods to high acquisition rates is strongly limited by the finite speed of available cameras (pixel readout rate).…”

Section: Introductionmentioning

confidence: 99%

A single-shot, high-repetition rate scheme for electro-optic detection of short pulses

Roussel

Évain

Parquier³

et al. 2015

Advances in X-Ray Free-Electron Lasers Instrumentation III

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We consider the problem of shot-by-shot acquisition of pulse shapes at high repetition rate in accelerator-based systems. More specifically, we examine the two-step strategy consisting in (i) encoding the pulse information onto a laser pulse, and (ii) use the so-called time-stretch strategy to "slow-down" the information before recording. We thus show that the repetition rate of already existing electro-optic sampling setups can be straightforwardly increased up to the 100 ×10 6 pulses/s range, and make a demonstration for the detection of coherent THz pulses. The strategy is however not limited to electro-optic sampling of THz pulses or electron bunches. It can be applied to other types of wavelengths, provided the desired information (as e.g., FEL pulses or electron bunches shapes) can be imprinted onto a laser pulse.

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Electro-optical measurement of sub-ps structures in low charge electron bunches

Cited by 26 publications

References 12 publications

High time resolution beam-based measurement of the rf-to-laser jitter in a photocathode rf gun

High time resolution beam-based measurement of the rf-to-laser jitter in a photocathode rf gun

From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizer

A single-shot, high-repetition rate scheme for electro-optic detection of short pulses

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