3 papers

title:	Ultrafast materials probing with the LLNL Thomson X-ray source
format:	conference procceeding
conference:	2002 Linear Accelerator Conference
year:	2002
24 authors:	A. Tremaine | S. Anderson | W. Brown | C. Barty | R. Cauble | J. Crane | H. Cynn | C. Ebbers | D. Fittinghoff | D. Gibson | F. Hartemann | I. Jovanovich | J. Kuba | G. P. Le Sage | A. McMahan | R. Minich | J. Moriarty | B. Remington | D. Slaughter | P. Springer | F. H. Steitz | C. S. Yoo | J. B. Rosenzweig | T. Ditmire
abstract:	The use of short laser pulses to generate very high brightness, ultra short (fs to ps) x-ray pulses is a topic of great interest. In principle, femtosecond-scale pump-probe experiments can be used to temporally resolve structural dynamics of materials on the time scale of atomic motion. The development of sub?ps x-ray pulses will make possible a wide range of materials and plasma physics studies with unprecedented time resolution. PLEIADES (Picosecond Laser Electron Interaction for Dynamic Evaluation of Structures), the Thomson scattering project at LLNL, will provide such a novel x-ray source of high power using short laser pulses and a high brightness, relativistic electron bunch. The system is based on a 5 mm-mrad normalized emittance photoinjector, 100 MeV electron RF linac, and a 300 mJ, 35 fs solid-state laser system. PLEIADES will produce ultra fast pulses with x-ray energies (60 keV) capable of probing into high-Z metals.
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title:	RF photoinjector development for a short-pulse, hard X-ray Thomson scattering source
format:	conference procceeding
conference:	9th Advanced Accelerator Concepts Workshop
year:	2001
6 authors:	G. P. Le Sage | S. G. Anderson | T. E. Cowan | J. K. Crane | T. Ditmire | J. B. Rosenzweig
abstract:	An important motivation in the development of the next generation X-ray light sources is to achieve picosecond and sub-ps pulses of hard X-rays for dynamic studies of a variety of physical, chemical anti biological processes. Present hard X-ray sources are either pulse-width or intensity limited, which allows ps-scale temporal resolution only for signal averaging of highly repetitive processes. A much faster and brighter hard X-ray source is being developed at LLNL, based on Thomson scattering of fs-laser pulses by a relativistic electron beam, which will enable X-ray characterization of the transient structure of a sample in a single shot. Experimental and diagnostic techniques relevant to the development of next generation sources including the Linac Coherent Light Source can be tested with the Thomson scattering hard X-ray source. This source will combine an RF photoinjector with a 100 MeV S-band linac. The photoinjector and linac also provide an ideal test-bed for examining space-charge induced emittance growth effects. A program of beam dynamics and diagnostic experiments are planned in parallel with Thomson source development. Our experimental progress and future plans will be discussed.
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title:	Ultrafast X-ray generation and applications using laser-linac interactions
format:	conference procceeding
conference:	1999 IEEE LEOS Annual Meeting
year:	1999
9 authors:	T. Ditmire | T. E. Cowan | G. LeSage | M. Allen | G. Hays | K. B. Wharton | M. D. Perry | H. T. Powell | James Rosenzweig
abstract:	At LLNL we have been working to integrate an intense short-pulse laser with a low-emittance relativistic electron beam utilizing a 100 MeV S-band linac. This project uses a 100 TW, 35 fs laser, which is currently under development. (3 References).
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