[en] This work describes the present situation of Pelletron-Linac Project and the steps that we accomplished last year. (author)

[en] A copy of PhD thesis by Dr. Seung Lee, supported by this grant and submitted during this contract period - ''Nonlinear Plasma Wakefield Acceleration: Models and Experiments''

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[en] In the last two decades a variety of novel concepts of electrons acceleration have been suggested and investigated. According to the interaction mechanism, these can be classified into three main groups: inverse radiation processes, space-charge wakes and electromagnetic wakes. In the first case, electrons are injected in structures that in 'normal' situations would generate radiation. Electromagnetic radiation is actually injected into the system and it accelerates a bunch of electrons. In the second case, a space-charge wake is generated in plasma by an intense laser pulse or short bunch of electrons. This space-charge wake may also accelerate a bunch of electrons. In the third case, an intense electron beam (bunch) generates radiation in a structure. This radiation is guided into an acceleration structure. Based on this classification, we shall review the basic concepts behind the first and the third group

[en] In the latter part of this year an exhibit treating the historical development of high energy particle accelerators and detectors will open in Washington, DC, at the National Museum of History and Technology of the Smithsonian Institution. Filling 8000 square feet with historical hardware, the exhibit, which will continue for several years, is the product of a collaboration between ERDA and the Smithsonian, with essential contributions from several ERDA-funded accelerator laboratories. A discussion is given of the exhibit's displays and floorplan

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[en] Dielectric wakefield accelerators have shown great promise toward high-gradient acceleration. We investigate the performances of a possible experiment under consideration at the FLASH facility in DESY to explore wakefield acceleration with an enhanced transformer ratio. The experiment capitalizes on a unique pulse shaping capability recently demonstrated at this facility. In addition, the facility incorporates a superconducting linear accelerator that could generate bunch trains with closely spaced bunches thereby opening the exploration of potential dynamical effects in dielectric wakefield accelerators.

[en] We presented experimental and theoretical progress since the last Advanced Accelerator Concepts Workshop in Lake Arrowhead. We also addressed the charge: to identify an optimized design for a 1000 MeV plasma accelerator demonstration and a 1 GeV demonstration

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