Projects per year
Abstract
The development of ultrahigh intensity laser facilities requires a detailed understanding of how accelerating charged particles interact with their own radiation fields. The AbrahamLorentzDirac (ALD) equation  the standard description of radiation reaction  is beset with difficulties, but when handled with care can provide useful information.
A kinetic theory has been developed, based on the exact ALD equation. Although the
unphysical solutions of the ALD equation obstruct the reduction of this theory to the
usual VlasovMaxwell system in the appropriate limit, its moments give rise to a
fluid theory which does have the correct limiting behaviour. As a simple illustration of the theory, the radiative damping of Langmuir waves gives rise to a modified dispersion relation. A new unphysical instability is found, originating from the runaway solutions of
the ALD equation, which must be rejected, leaving the physical solutions which display
the correct slow damping.
A kinetic theory has been developed, based on the exact ALD equation. Although the
unphysical solutions of the ALD equation obstruct the reduction of this theory to the
usual VlasovMaxwell system in the appropriate limit, its moments give rise to a
fluid theory which does have the correct limiting behaviour. As a simple illustration of the theory, the radiative damping of Langmuir waves gives rise to a modified dispersion relation. A new unphysical instability is found, originating from the runaway solutions of
the ALD equation, which must be rejected, leaving the physical solutions which display
the correct slow damping.
Original language  English 

Title of host publication  Central Laser Facility Annual Report 20102011 
Editors  Brian Wyborn 
Pages  28 
Number of pages  1 
Publication status  Published  2011 
Keywords
 radiation reaction
 lasers
Projects
 4 Finished

Extreme light infrastructure (ELI)
STFC Science and Technology Facilities Council
1/04/08 → 31/03/11
Project: Research