`Hooker and his collaborators achieved both goals by directing ring-shaped pulses from an auxiliary laser into a gas cell. These pulses ionized the gas and created a cylindrical plasma channel 110 mm long with favorable radial and axial density profiles. When pulses from the main laser entered the channel, electrons in the low-density plasma at the channel entrance were injected and accelerated in the main body of the channel.`

https://physics.aps.org/articles/v16/s177

#electronLaser #freeElectronLaser #FEL

Creating Fast Bunches of Electrons with Lasers

The judicious shaping of a tube of plasma by one laser enhances the properties of electron bunches accelerated by another.

Physics

(prelude to khranentitia.com, 5/y)

„I need to say that the surface world around here is already quite an experience.“

She sighs. „Oh yes, it is. It's a good contrast to the daily work underground.“ 

Finally, after walking along a huge mound stretched into a straight line for about one kilometer, they enter one of the tin-like buildings that give access to what lies underneath this mound: The x-ray #electronlaser, a huge facility that manages to depict the activity of molecules.

(#story)...