Improving performance of inverse Compton sources through laser chirping
We present a new method for computation of radiation spectra in the non-linear regime of operation of inverse Compton sources characterized by high laser intensities. The resulting simulations agree well with the experiments. Increasing the laser intensity changes the longitudinal velocity of the el...
Saved in:
Published in | Europhysics letters Vol. 126; no. 1; pp. 12003 - 12009 |
---|---|
Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
EDP Sciences, IOP Publishing and Società Italiana di Fisica
01.04.2019
IOP Publishing |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | We present a new method for computation of radiation spectra in the non-linear regime of operation of inverse Compton sources characterized by high laser intensities. The resulting simulations agree well with the experiments. Increasing the laser intensity changes the longitudinal velocity of the electrons during their collision, leading to considerable non-linear broadening in the scattered radiation spectra. The effects of such ponderomotive broadening are so deleterious that most inverse Compton sources either remain at low laser intensities or pay a steep price to operate at a small fraction of the physically possible peak spectral output. This ponderomotive broadening can be reduced by a suitable frequency modulation (also referred to as "chirping", which is not necessarily linear) of the incident laser pulse, thereby drastically increasing the peak spectral density. This frequency modulation, included in the new code as an optional functionality, is used in simulations to motivate the experimental implementation of this transformative technique. |
---|---|
Bibliography: | istex:F7BCF985FC59C7367526B0B435E6AB2C26034CB2 publisher-ID:epl19636 href:https://epljournal.edpsciences.org/0295-5075/126/i=1/a=12003/article ark:/67375/80W-8B60XK7P-7 JLAB-ACC-19-3000; DOE/OR/23177-4757; arXiv:1902.04240 USDOE AC05-06OR23177 |
ISSN: | 0295-5075 1286-4854 1286-4854 |
DOI: | 10.1209/0295-5075/126/12003 |