Lawrence Livermore National Laboratory originally built the Beamlet
laser to serve as the scientific prototype of the National Ignition Facility.
An effective way to do this, which overcomes space charge limits, is to produce these high current beams by merging a large number of high-current beamlets
With IMRT it is now possible to vary dose intensity using thousands of radiation beamlets
and "paint" an irregularly shaped target with radiation while sculpting the dose to avoid adjacent organs.
Here, wavefront rotation has been induced on the laser beam, leading to a spatial splitting of this attosecond pulse train into a collection of beamlets
containing isolated attosecond pulses.
Typically, tens of thousands of beamlets
are included in a TomoTherapy radiation treatment.
Optical filaments are highly intense and non-diffracting self-guided beamlets
that form within ultra-short pulsed laser beams.