Single-shot electron diffraction using a cold atom electron source

  title={Single-shot electron diffraction using a cold atom electron source},
  author={Rory W. Speirs and Corey T. Putkunz and Andrew J McCulloch and Keith A. Nugent and B. M. Sparkes and Robert Scholten},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
Cold atom electron sources (CAESs) are a promising alternative to traditional photocathode sources for use in ultrafast electron diffraction due to greatly reduced electron temperature at creation, and the potential for a corresponding increase in brightness. Here we demonstrate single-shot, nanosecond electron diffraction from monocrystalline gold using cold electron bunches generated in a CAES. The diffraction patterns have sufficient signal to allow registration of multiple single-shot… 

Electron diffraction using a cold atom source

Observing matter on atomic length and time scales simultaneously is now routinely achieved in ultrafast electron and X-ray imaging techniques, but continued advances in both approaches promise to

Cold electron sources using laser-cooled atoms

Since the first observation of electron diffraction in 1927, electrons have been used to probe the structure of matter. High-brightness sources of thermal electrons have recently emerged that are

Stimulated Raman Adiabatic Passage for Improved Performance of a Cold Atom Electron and Ion Source

We implement high-efficiency coherent excitation to a Rydberg state using stimulated Raman adiabatic passage in a cold atom electron and ion source. We achieve an efficiency of 60% averaged over the

Extraction dynamics of electrons from magneto-optically trapped atoms

Pulsed photoionization of laser-cooled atoms in a magneto-optical trap (MOT) has the potential to create cold electron beams of few meV bandwidths and few ps pulse lengths. Such a source would be

Compact ultracold electron source based on a grating magneto-optical trap

The ultrafast and ultracold electron source, based on near-threshold photoionisation of a laser-cooled and trapped atomic gas, offers a unique combination of low transverse beam emittance and high

From ultracold electrons to coherent soft X-rays

Electromagnetic radiation in the soft x-ray spectral range ($1-100~\rm{nm}$ wavelengths or $0.01-1~\rm{keV}$ photon energies) is rapidly gaining importance in both fundamental research and industrial

Time-resolved brightness measurements by streaking

Brightness is a key figure of merit for charged particle beams, and time-resolved brightness measurements can elucidate the processes involved in beam creation and manipulation. Here we report on a

An ultracold and ultrafast electron source

We present measurements of the pulse length of ultracold electron bunches generated by near-threshold two-photon photoionisation of a laser-cooled gas. The pulse length has been measured using a

Pulse length of ultracold electron bunches extracted from a laser cooled gas

Measurements of the pulse length of ultracold electron bunches generated by near-threshold two-photon photoionization of a laser-cooled gas are presented and Rydberg states which slowly ionize on microsecond time scales are produced.

The Advantage of Cold Electron Source in Electron Diffraction

In this paper, a model for discussing the influence of transverse coherence of electron beams on electron diffraction is established. With reference to Fedele's thermalwave model, the transverse



Single-shot ultrafast electron diffraction with a laser-accelerated sub-MeV electron pulse

We have demonstrated single-shot measurement of electron diffraction patterns for a single-crystal gold foil using 340 keV electron pulses accelerated by intense femtosecond laser pulses with an

High quality single shot diffraction patterns using ultrashort megaelectron volt electron beams from a radio frequency photoinjector.

High quality images with spatial resolution sufficient to distinguish closely spaced peaks in the Debye-Scherrer ring pattern have been recorded by scattering the 1.5 MeV electron beam generated in the rf photoinjector off a 100-nm-thick Au foil.

Electron source concept for single-shot sub-100 fs electron diffraction in the 100 keV range

We present a method for producing sub-100 fs electron bunches that are suitable for single-shot ultrafast electron diffraction experiments in the 100 keV energy range. A combination of analytical

Ultrafast electron diffraction using an ultracold source

Diffraction patterns from graphite are presented, obtained with bunches from an ultracold electron source, based on femtosecond near-threshold photoionization of a laser-cooled atomic gas, and their suitability for protein crystal diffraction is confirmed.

High-coherence picosecond electron bunches from cold atoms

It is demonstrated that a two-colour process with femtosecond excitation followed by nanosecond photoionization can produce picosecond electron bunches with high transverse coherence, paving the way for single-shot electron diffraction from crystalline biological samples.

Ultracold Electron Sources

Ultra-cold plasmas with electron temperatures of ~10 K can be created by photo-ionization just above threshold of a cloud of laser-cooled atoms. Recently it was shown 7 by GPT particle tracking

Ultracold electron source.

Results of simulations in a realistic setting are presented, showing that an ultracold plasma has an enormous potential as a bright electron source.

Note: Single-shot continuously time-resolved MeV ultrafast electron diffraction.

A single-shot, high quality, streaked diffraction pattern allowed structural information within several picoseconds to be continuously temporally resolved with an approximately 200 fs resolution.

Outrun radiation damage with electrons?

  • R. Egerton
  • Physics
    Advanced Structural and Chemical Imaging
  • 2015
The diffract-before-destroy method, using 50- to 100-fs x-ray pulses from a free-electron laser, was designed to determine the three-dimensional structure of biological macromolecules in close to