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Title: Improving performance of inverse Compton sources through laser chirping

Abstract

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.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1547298
Report Number(s):
JLAB-ACC-19-3000; DOE/OR/23177-4757; arXiv:1902.04240
Journal ID: ISSN 1286-4854
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Journal Article
Journal Name:
Europhysics Letters (Online)
Additional Journal Information:
Journal Volume: 126; Journal Issue: 1; Journal ID: ISSN 1286-4854
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

Citation Formats

Terzić, B., Brown, A., Drebot, I., Hagerman, T., Johnson, E., Krafft, G. A., Maroli, C., Petrillo, V., and Ruijter, M. Improving performance of inverse Compton sources through laser chirping. United States: N. p., 2019. Web. doi:10.1209/0295-5075/126/12003.
Terzić, B., Brown, A., Drebot, I., Hagerman, T., Johnson, E., Krafft, G. A., Maroli, C., Petrillo, V., & Ruijter, M. Improving performance of inverse Compton sources through laser chirping. United States. doi:10.1209/0295-5075/126/12003.
Terzić, B., Brown, A., Drebot, I., Hagerman, T., Johnson, E., Krafft, G. A., Maroli, C., Petrillo, V., and Ruijter, M. Wed . "Improving performance of inverse Compton sources through laser chirping". United States. doi:10.1209/0295-5075/126/12003. https://www.osti.gov/servlets/purl/1547298.
@article{osti_1547298,
title = {Improving performance of inverse Compton sources through laser chirping},
author = {Terzić, B. and Brown, A. and Drebot, I. and Hagerman, T. and Johnson, E. and Krafft, G. A. and Maroli, C. and Petrillo, V. and Ruijter, M.},
abstractNote = {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.},
doi = {10.1209/0295-5075/126/12003},
journal = {Europhysics Letters (Online)},
issn = {1286-4854},
number = 1,
volume = 126,
place = {United States},
year = {2019},
month = {5}
}