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A. M. Tremaine

First Name: A.

Middle Name: M.

Last Name: Tremaine

Full Name: A. M. Tremaine

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4 papers

title: Commissioning of a High-Brightness Photoinjector for Compton Scattering X-Ray Sources

format: journal article

year: 2007

13 authors: S. G. Anderson | C. P. J. Barty | D. J. Gibson | F. V. Hartemann | M. Messerly | M. Shverdin | C. W. Siders | A. M. Tremaine | H. Badakov | P. Frigola | A. Fukasawa | B. OShea | J. B. Rosenzweig

abstract: Compton scattering of intense laser pulses with ultra- relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV ener- gies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free- electron lasers and laser and plasma based advanced accel- erators. We describe the development and commissioning of a 1.6 cell RF photoinjector for use in Compton scatter- ing experiments at LLNL. Injector development issues such as RF cavity design, beam dynamics simulations, emit- tance diagnostic development, results of sputtered magne- sium photo-cathode experiments, and UV laser pulse shap- ing are discussed. Initial operation of the photoinjector is described.

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title: Experimental characterization of an ultrafast Thomson scattering x-ray source with three-dimensional time and frequency-domain analysis

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year: 2004

18 authors: W. J. Brown | S. G. Anderson | C. P. J. Barty | S. M. Betts | R. Booth | J. K. Crane | R. R. Cross | D. N. Fittinghoff | D. J. Gibson | F. V. Hartemann | E. P. Hartouni | J. Kuba | G. P. Le Sage | D. R. Slaughter | A. M. Tremaine | A. J. Wootton | P. T. Springer | J. B. Rosenzweig

abstract: We present a detailed comparison of the measured characteristics of Thomson backscattered xrays produced at the 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 photons produced from linear Thomson scattering for both bandwidth-limited and chirped incident laser pulses. Spectral broadening of the scattered x-ray pulse resulting from the incident laser bandwidth, perpendicular wave vector components in the laser focus, and the transverse and longitudinal phase spaces of the electron beam are included. Electron beam energy, energy spread, and transverse phase space measurements of the electron beam at the interaction point are presented, and the corresponding predicted x-ray characteristics are determined. In addition, time-integrated measurements of the xrays produced from the interaction are presented and shown to agree well with the simulations.

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title: Production of femtosecond pulses and

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9 authors: S. G. Anderson | D. J. Gibson | F. V. Hartemann | J. S. Jacob | A. M. Tremaine | J. K. Lim | P. Frigola | J. B. Rosenzweig | G. Travish

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title: HIgh Energy, High Brightness X-Rays Produced by Compton Back Scattering at the Livermore PLEIADES facility

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11 authors: A. M. Tremaine | S. G. Anderson | S. Betts | J. Crane | J. Gibson | F. V. Hartemann | J. S. Jacob | P. Frigola | J. Lim | J. Rosenzweig | G. Travish

abstract: PLEIADES (Picosecond Laser Electron Interaction for the Dynamic Evaluation of Structures) produces tunable 30-140 keV x-rays with 0.3-5 ps pulse lengths and up to 10^7 photons/pulse by colliding a high brightness electron beam with a high power laser. The electron beam is created by an rf photo-injector system, accelerated by a 120 MeV linac, and focused to 20 μm with novel permanent magnet quadrupoles. To produce Compton back scattered x-rays, the electron bunch is overlapped with a Ti:Sapphire laser that delivers 500 mJ, 100 fs, pulses to the interaction point. K-edge radiography at 115 keV on Uranium has verified the angle correlated energy spectrum inherent in Compton scattering and high-energy tunability of the Livermore source. Current upgrades to the facility will allow laser pumping of targets synchronized to the x-ray source enabling dynamic diffraction and time-resolved studies of high Z materials. Near future plans include extending the radiation energies to >400 keV, allowing for nuclear fluorescence studies of materials.

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title:	Commissioning of a High-Brightness Photoinjector for Compton Scattering X-Ray Sources
format:	journal article
year:	2007
13 authors:	S. G. Anderson \| C. P. J. Barty \| D. J. Gibson \| F. V. Hartemann \| M. Messerly \| M. Shverdin \| C. W. Siders \| A. M. Tremaine \| H. Badakov \| P. Frigola \| A. Fukasawa \| B. OShea \| J. B. Rosenzweig
abstract:	Compton scattering of intense laser pulses with ultra- relativistic electron beams has proven to be an attractive source of high-brightness x-rays with keV to MeV ener- gies. This type of x-ray source requires the electron beam brightness to be comparable with that used in x-ray free- electron lasers and laser and plasma based advanced accel- erators. We describe the development and commissioning of a 1.6 cell RF photoinjector for use in Compton scatter- ing experiments at LLNL. Injector development issues such as RF cavity design, beam dynamics simulations, emit- tance diagnostic development, results of sputtered magne- sium photo-cathode experiments, and UV laser pulse shap- ing are discussed. Initial operation of the photoinjector is described.
keywords:	pbpl
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title:	Experimental characterization of an ultrafast Thomson scattering x-ray source with three-dimensional time and frequency-domain analysis
format:	journal article
year:	2004
18 authors:	W. J. Brown \| S. G. Anderson \| C. P. J. Barty \| S. M. Betts \| R. Booth \| J. K. Crane \| R. R. Cross \| D. N. Fittinghoff \| D. J. Gibson \| F. V. Hartemann \| E. P. Hartouni \| J. Kuba \| G. P. Le Sage \| D. R. Slaughter \| A. M. Tremaine \| A. J. Wootton \| P. T. Springer \| J. B. Rosenzweig
abstract:	We present a detailed comparison of the measured characteristics of Thomson backscattered xrays produced at the 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 photons produced from linear Thomson scattering for both bandwidth-limited and chirped incident laser pulses. Spectral broadening of the scattered x-ray pulse resulting from the incident laser bandwidth, perpendicular wave vector components in the laser focus, and the transverse and longitudinal phase spaces of the electron beam are included. Electron beam energy, energy spread, and transverse phase space measurements of the electron beam at the interaction point are presented, and the corresponding predicted x-ray characteristics are determined. In addition, time-integrated measurements of the xrays produced from the interaction are presented and shown to agree well with the simulations.
keywords:	pbpl
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title:	Production of femtosecond pulses and
format:	journal article
year:
9 authors:	S. G. Anderson \| D. J. Gibson \| F. V. Hartemann \| J. S. Jacob \| A. M. Tremaine \| J. K. Lim \| P. Frigola \| J. B. Rosenzweig \| G. Travish
abstract:
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title:	HIgh Energy, High Brightness X-Rays Produced by Compton Back Scattering at the Livermore PLEIADES facility
format:	journal article
year:
11 authors:	A. M. Tremaine \| S. G. Anderson \| S. Betts \| J. Crane \| J. Gibson \| F. V. Hartemann \| J. S. Jacob \| P. Frigola \| J. Lim \| J. Rosenzweig \| G. Travish
abstract:	PLEIADES (Picosecond Laser Electron Interaction for the Dynamic Evaluation of Structures) produces tunable 30-140 keV x-rays with 0.3-5 ps pulse lengths and up to 10^7 photons/pulse by colliding a high brightness electron beam with a high power laser. The electron beam is created by an rf photo-injector system, accelerated by a 120 MeV linac, and focused to 20 μm with novel permanent magnet quadrupoles. To produce Compton back scattered x-rays, the electron bunch is overlapped with a Ti:Sapphire laser that delivers 500 mJ, 100 fs, pulses to the interaction point. K-edge radiography at 115 keV on Uranium has verified the angle correlated energy spectrum inherent in Compton scattering and high-energy tunability of the Livermore source. Current upgrades to the facility will allow laser pumping of targets synchronized to the x-ray source enabling dynamic diffraction and time-resolved studies of high Z materials. Near future plans include extending the radiation energies to >400 keV, allowing for nuclear fluorescence studies of materials.
keywords:	pbpl
Download \| View \| Details \| edit \| delete

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