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Laser System for Photoelectron and X-Ray Production in the PLEIADES Compton Light Source

Description: The PLEIADES (Picosecond Laser-Electron Interaction for the Dynamic Evaluation of Structures) facility provides tunable short x-ray pulses with energies of 30-140 keV and pulse durations of 0.3-5 ps by scattering an intense, ultrashort laser pulse off a 35-75 MeV electron beam. Synchronization of the laser and electron beam is obtained by using a photoinjector gun, and using the same laser system to generate the electrons and the scattering laser. The Ti Ti:Sapphire, chirped pulse amplification… more
Date: April 21, 2005
Creator: Gibson, D J; Barty, C J; Betts, S M; Crane, J K & Jovanovic, I
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Partner: UNT Libraries Government Documents Department
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High Power Picosecond Laser Pulse Recirculation

Description: We demonstrate a nonlinear crystal-based short pulse recirculation cavity for trapping the second harmonic of an incident high power laser pulse. This scheme aims to increase the efficiency and flux of Compton-scattering based light sources. We demonstrate up to 36x average power enhancement of frequency doubled sub-millijoule picosecond pulses, and 17x average power enhancement of 177 mJ, 10 ps, 10 Hz pulses.
Date: April 12, 2010
Creator: Shverdin, M Y; Jovanovic, I; Semenov, V A; Betts, S M; Brown, C; Gibson, D J et al.
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Partner: UNT Libraries Government Documents Department
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Optimal Design of a Tunable Thomson-Scattering Based Gamma-Ray Source

Description: Thomson-Scattering based systems offer a path to high-brightness high-energy (> 1 MeV) x-ray and {gamma}-ray sources due to their favorable scaling with electron energy. LLNL is currently engaged in an effort to optimize such a device, dubbed the ''Thomson-Radiated Extreme X-Ray'' (T-REX) source, targeting up to 680 keV photon energy. Such a system requires precise design of the interaction between a high-intensity laser pulse and a high-brightness electron beam. Presented here are the optim… more
Date: June 7, 2007
Creator: Gibson, D J; Anderson, S G; Betts, S M; Hartemann, F V; Jovanovic, I; McNabb, D P et al.
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Partner: UNT Libraries Government Documents Department
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Advanced Compton scattering light source R&D at LLNL

Description: We report the design and current status of a monoenergetic laser-based Compton scattering 0.5-2.5 MeV {gamma}-ray source. Previous nuclear resonance fluorescence results and future linac and laser developments for the source are presented. At MeV photon energies relevant for nuclear processes, Compton scattering light sources are attractive because of their relative compactness and improved brightness above 100 keV, compared to typical 4th generation synchrotrons. Recent progress in accelerator… more
Date: February 16, 2010
Creator: Albert, F.; Anderson, S. G.; Anderson, G.; Betts, S. M.; Chu, T. S.; Gibson, D. J. et al.
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Partner: UNT Libraries Government Documents Department
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Fiber-Based, Spatially and Temporally Shaped Picosecond UV Laser for Advanced RF Gun Applications

Description: The fiber-based, spatially and temporally shaped, picosecond UV laser system described here has been specifically designed for advanced rf gun applications, with a special emphasis on the production of high-brightness electron beams for free-electron lasers and Compton scattering light sources. The laser pulse can be shaped to a flat-top in both space and time with a duration of 10 ps at full width of half-maximum (FWHM) and rise and fall times under 1 ps. The expected pulse energy is 50 {micro… more
Date: June 8, 2007
Creator: Shverdin, M Y; Anderson, S G; Betts, S M; Gibson, D J; Hartemann, F V; Hernandez, J E et al.
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Partner: UNT Libraries Government Documents Department
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High-energy Picosecond Laser Pulse Recirculation for Compton Scattering

Description: Frequency upconversion of laser-generated photons by inverse Compton scattering for applications such as nuclear spectroscopy and gamma-gamma collider concepts on the future ILC would benefit from an increase of average source brightness. The primary obstacle to higher average brightness is the relatively small Thomson scattering cross section. It has been proposed that this limitation can be partially overcome by use of laser pulse recirculation. The traditional approach to laser recirculation… more
Date: June 12, 2007
Creator: Jovanovic, I; Anderson, S G; Betts, S M; Brown, C; Gibson, D J; Hartemann, F V et al.
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Partner: UNT Libraries Government Documents Department
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Design and Operation of a tunable MeV-level Compton-scattering-based (gamma-ray) source

Description: A mono-energetic gamma-ray (MEGa-ray) source based on Compton-scattering, targeting nuclear physics applications such as nuclear resonance fluorescence, has been constructed and commissioned at Lawrence Livermore National Laboratory. In this paper, the overall architecture of the system, as well as some of the critical design decisions made in the development of the source, are discussed. The performances of the two laser systems (one for electron production, one for scattering), the electron p… more
Date: July 7, 2009
Creator: Gibson, D. J.; Albert, F.; Anderson, S. G.; Betts, S. M.; Messerly, M. J.; Phan, H. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compton Scattering and Its Applications: The PLEIADES Femtosecond X-ray Source at Lawrence Livermore National Laboratory

Description: Remarkable developments in critical technologies including terawatt-class lasers using chirped-pulse amplification, high brightness photoinjectors, high-gradient accelerators, and superconducting linacs make it possible to design and operate compact, tunable, subpicosecond Compton scattering x-ray sources with a wide variety of applications. In such novel radiation sources, the collision between a femtosecond laser pulse and a low emittance relativistic electron bunch in a small ({micro}m{sup 3… more
Date: May 1, 2003
Creator: Hartemann, F V; Brown, W J; Anderson, S G; Barty, C P J; Betts, S M; Booth, R et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PLEIADES: A Picosecond Compton Scattering X-Ray Source for Advanced Backlighting and Time-Resolved Material Studies

Description: The PLEIADES (Picosecond Laser-Electron Inter-Action for the Dynamical Evaluation of Structures) facility has produced first light at 70 keV. This milestone offers a new opportunity to develop laser-driven, compact, tunable x-ray sources for critical applications such as diagnostics for the National Ignition Facility and time-resolved material studies. The electron beam was focused to 50 {micro}m rms, at 57 MeV, with 260 C of charge, a relative energy spread of 0.2%, and a normalized emittance … more
Date: October 20, 2003
Creator: Gibson, D J; Anderson, S G; Barty, C P; Betts, S M; Booth, R; Brown, W J et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PLEIADES: High Peak Brightness, Subpicosecond Thomson Hard-X-ray source

Description: The Picosecond Laser-Electron Inter-Action for the Dynamic Evaluation of Structures (PLEIADES) facility, is a unique, novel, tunable (10-200 keV), ultrafast (ps-fs), hard x-ray source that greatly extends the parameter range reached by existing 3rd generation sources, both in terms of x-ray energy range, pulse duration, and peak brightness at high energies. First light was observed at 70 keV early in 2003, and the experimental data agrees with 3D codes developed at LLNL. The x-rays are generate… more
Date: December 15, 2003
Creator: Kuba, J.; Anderson, S. G.; Barty, C. J.; Betts, S. M.; Booth, R.; Brown, W. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Short Pulse High Brightness X-ray Production with the PLEIADES Thomson Scattering Source

Description: We describe PLEIADES, a compact, tunable, high-brightness, ultra-short pulse, Thomson x-ray source. The peak brightness of the source is expected to exceed 10{sup 20} photons/s/0.1% bandwidth/mm{sup 2}/mrad{sup 2}. Initial results are reported and compared to theoretical calculations.
Date: July 1, 2003
Creator: Anderson, S G; Barty, C P J; Betts, S M; Brown, W J; Crane, J K; Cross, R R et al.
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Partner: UNT Libraries Government Documents Department
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Experimental Characterization of an Ultra-Fast Thomson Scattering X-Ray Source With Three-Dimensional Time and Frequency-Domain Analysis

Description: We present a detailed comparison of the measured characteristics of Thomson backscattered x-rays produced at the PLEIADES (Picosecond Laser-Electron Interaction for the Dynamic Evaluation of Structures) facility at Lawrence Livermore National Laboratory to predicted results from a newly developed, fully three-dimensional time and frequency-domain code. Based on the relativistic differential cross section, this code has the capability to calculate time and space dependent spectra of the x-ray ph… more
Date: January 27, 2004
Creator: Kuba, J; Slaughter, D R; Fittinghoff, D N; Barty, C J; Hartouni, E P; Anderson, S G et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser Technology for Precision Monoenergetic Gamma-Ray Source R&D at Llnl

Description: Generation of mono-energetic, high brightness gamma-rays requires state of the art lasers to both produce a low emittance electron beam in the linac and high intensity, narrow linewidth laser photons for scattering with the relativistic electrons. Here, we overview the laser systems for the 3rd generation Monoenergetic Gamma-ray Source (MEGa-ray) currently under construction at Lawrence Livermore National Lab (LLNL). We also describe a method for increasing the efficiency of laser Compton scatt… more
Date: April 20, 2010
Creator: Shverdin, M. Y.; Bayramian, A.; Albert, F.; Anderson, S. G.; Betts, S. M.; Chu, T. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Overview of Mono-Energetic Gamma-Ray Sources & Applications

Description: Recent progress in accelerator physics and laser technology have enabled the development of a new class of tunable gamma-ray light sources based on Compton scattering between a high-brightness, relativistic electron beam and a high intensity laser pulse produced via chirped-pulse amplification (CPA). A precision, tunable Mono-Energetic Gamma-ray (MEGa-ray) source driven by a compact, high-gradient X-band linac is currently under development and construction at LLNL. High-brightness, relativisti… more
Date: May 18, 2010
Creator: Hartemann, F. V.; Albert, F.; Anderson, G. G.; Anderson, S. G.; Bayramian, A. J.; Betts, S. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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