Not exact matches
When an
intense laser
pulse strikes a plasma of
electrons and positive ions, it shoves the lighter
electrons forward, separating the charges and creating a secondary electric field that pulls the ions along behind the light like water in the wake of a speedboat.
As each flash is
intense enough to completely ionise a neon atom and release an
electron, the researchers could use those
electrons like a flashgun, to illuminate some of the original 2.5 femtosecond trigger
pulses of laser light.
Intense extreme ultraviolet FEL
pulses were directed at the clusters and the resultant energy distribution of
electrons knocked out of the clusters was measured using a «velocity map imaging spectrometer».
Since the FEL
pulse is so
intense, many
electrons become loosely bound in the clusters at the same time; meaning many atoms become excited.
The investigation of cluster explosion dynamics under
intense extreme - ultraviolet (XUV)
pulses has so far been limited to large scale facilities like free -
electron lasers.
This strategy makes use of the
intense electric fields associated with
pulsed, high - energy laser beams to accelerate
electrons and protons to «relativistic» velocities (i.e. speeds approaching that of light).
These accelerators work by shooting
pulses of
intense laser light into plasma to create a wave rippling through the cloud of ionised gas, leaving a wake of
electrons akin to those that form behind a speedboat in water.
Porous silicon has been made to glow under many types of excitation, including X-rays,
intense pulses of infrared photons, and
electron and ion beams.
Late last year two groups published papers in Science showing how
intense laser
pulses could be used to liberate
electrons not only from the highest molecular orbital but also from the next orbital below.
«The work shows how magnetization of nanoscale magnets can be steered by
intense ultrashort
electron pulses,» said Alexander Schäffer, a doctoral student at Martin - Luther - Universität Halle - Wittenberg in Halle, Germany, and lead author of the paper.