skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultrahigh intensity Compton scattering focused X-ray source

Abstract

At ultrahigh intensities, where the normalized vector potential associated with the laser wave exceeds unity, the electron axial velocity modulation due to radiation pressure yields nonlinear Compton backscattered spectra. For applications requiring a narrow Doppler upshifted linewidth, such as the future {gamma}-{gamma} collider or focused X-ray generation, this can pose a serious problem. It is shown that temporal laser pulse shaping using spectral filtering at the Fourier plane of a chirped pulse laser amplifier, or similar approaches, can alleviate this problem, and that this technique can be scaled to the required multi-TW range. Compton backscattered spectra are derived in three cases: hyperbolic secant, hybrid pulses (hyperbolic secant transient and flat-top), and square optical pulses similar to those experimentally obtained by Weiner et al. It is found that the optimum laser pulse shapes correspond to square pulses, yielding a high contrast ratio between the main spectral line and the transient lines. The corresponding spectral filter function is also determined, and its practical implementation in a CPA laser is addressed.

Authors:
 [1]; ; ; ; ;  [1]
  1. Univ. of California, Davis, CA (United States)
Publication Date:
Sponsoring Org.:
Department of Defense, Washington, DC (United States); Lawrence Livermore National Lab., CA (United States)
OSTI Identifier:
330582
Report Number(s):
CONF-970559-
Journal ID: ISSN 0730-9244; TRN: IM9915%%98
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 24. IEEE international conference on plasma science, San Diego, CA (United States), 19-23 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of IEEE conference record -- Abstracts; PB: 354 p.
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; COMPTON EFFECT; BACKSCATTERING; LASER RADIATION; ELECTROMAGNETIC PULSES; BEAM SHAPING; X-RAY LASERS

Citation Formats

Hartemann, F V, Nonlinear Technologies, Oakland, CA, Troha, A L, LeSage, G P, Bennett, C V, Kolner, B H, and Luhmann, Jr, N C. Ultrahigh intensity Compton scattering focused X-ray source. United States: N. p., 1997. Web.
Hartemann, F V, Nonlinear Technologies, Oakland, CA, Troha, A L, LeSage, G P, Bennett, C V, Kolner, B H, & Luhmann, Jr, N C. Ultrahigh intensity Compton scattering focused X-ray source. United States.
Hartemann, F V, Nonlinear Technologies, Oakland, CA, Troha, A L, LeSage, G P, Bennett, C V, Kolner, B H, and Luhmann, Jr, N C. Wed . "Ultrahigh intensity Compton scattering focused X-ray source". United States.
@article{osti_330582,
title = {Ultrahigh intensity Compton scattering focused X-ray source},
author = {Hartemann, F V and Nonlinear Technologies, Oakland, CA and Troha, A L and LeSage, G P and Bennett, C V and Kolner, B H and Luhmann, Jr, N C},
abstractNote = {At ultrahigh intensities, where the normalized vector potential associated with the laser wave exceeds unity, the electron axial velocity modulation due to radiation pressure yields nonlinear Compton backscattered spectra. For applications requiring a narrow Doppler upshifted linewidth, such as the future {gamma}-{gamma} collider or focused X-ray generation, this can pose a serious problem. It is shown that temporal laser pulse shaping using spectral filtering at the Fourier plane of a chirped pulse laser amplifier, or similar approaches, can alleviate this problem, and that this technique can be scaled to the required multi-TW range. Compton backscattered spectra are derived in three cases: hyperbolic secant, hybrid pulses (hyperbolic secant transient and flat-top), and square optical pulses similar to those experimentally obtained by Weiner et al. It is found that the optimum laser pulse shapes correspond to square pulses, yielding a high contrast ratio between the main spectral line and the transient lines. The corresponding spectral filter function is also determined, and its practical implementation in a CPA laser is addressed.},
doi = {},
journal = {},
issn = {0730-9244},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {12}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: