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Title: Combining harmonic generation and laser chirping to achieve high spectral density in Compton sources

Abstract

Recently various laser-chirping schemes have been investigated with the goal of reducing or eliminating ponderomotive line broadening in Compton or Thomson scattering occurring at high laser intensities. Moreover, as a next level of detail in the spectrum calculations, we have calculated the line smoothing and broadening expected due to incident beam energy spread within a one-dimensional plane wave model for the incident laser pulse, both for compensated (chirped) and unchirped cases. The scattered compensated distributions are treatable analytically within three models for the envelope of the incident laser pulses: Gaussian, Lorentzian, or hyperbolic secant. We use the new results to demonstrate that the laser chirping in Compton sources at high laser intensities: (i) enables the use of higher order harmonics, thereby reducing the required electron beam energies; and (ii) increases the photon yield in a small frequency band beyond that possible with the fundamental without chirping. We found that this combination of chirping and higher harmonics can lead to substantial savings in the design, construction and operational costs of the new Compton sources. This is of particular importance to the widely popular laser-plasma accelerator based Compton sources, as the improvement in their beam quality enters the regime where chirping ismore » most effective.« less

Authors:
; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1249725
Alternate Identifier(s):
OSTI ID: 1248816
Report Number(s):
JLAB-ACP-16-2151; DOE/OR/23177-3790
Journal ID: ISSN 2469-9888; PRABFM; 044403
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 19; Journal Issue: 4; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Terzić, Balša, Reeves, Cody, and Krafft, Geoffrey A. Combining harmonic generation and laser chirping to achieve high spectral density in Compton sources. United States: N. p., 2016. Web. doi:10.1103/PhysRevAccelBeams.19.044403.
Terzić, Balša, Reeves, Cody, & Krafft, Geoffrey A. Combining harmonic generation and laser chirping to achieve high spectral density in Compton sources. United States. doi:10.1103/PhysRevAccelBeams.19.044403.
Terzić, Balša, Reeves, Cody, and Krafft, Geoffrey A. Mon . "Combining harmonic generation and laser chirping to achieve high spectral density in Compton sources". United States. doi:10.1103/PhysRevAccelBeams.19.044403.
@article{osti_1249725,
title = {Combining harmonic generation and laser chirping to achieve high spectral density in Compton sources},
author = {Terzić, Balša and Reeves, Cody and Krafft, Geoffrey A.},
abstractNote = {Recently various laser-chirping schemes have been investigated with the goal of reducing or eliminating ponderomotive line broadening in Compton or Thomson scattering occurring at high laser intensities. Moreover, as a next level of detail in the spectrum calculations, we have calculated the line smoothing and broadening expected due to incident beam energy spread within a one-dimensional plane wave model for the incident laser pulse, both for compensated (chirped) and unchirped cases. The scattered compensated distributions are treatable analytically within three models for the envelope of the incident laser pulses: Gaussian, Lorentzian, or hyperbolic secant. We use the new results to demonstrate that the laser chirping in Compton sources at high laser intensities: (i) enables the use of higher order harmonics, thereby reducing the required electron beam energies; and (ii) increases the photon yield in a small frequency band beyond that possible with the fundamental without chirping. We found that this combination of chirping and higher harmonics can lead to substantial savings in the design, construction and operational costs of the new Compton sources. This is of particular importance to the widely popular laser-plasma accelerator based Compton sources, as the improvement in their beam quality enters the regime where chirping is most effective.},
doi = {10.1103/PhysRevAccelBeams.19.044403},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 19,
place = {United States},
year = {2016},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.19.044403

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Cited by: 2 works
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