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Michel, P.

Paper Title Page
WPAP007 Status of the 3½ Cell Superconducting RF Gun Project in Rossendorf 1081
 
  • R. Xiang, H. Buettig, P. Evtushenko, D. Janssen, U. Lehnert, P. Michel, K. Moeller, Ch. Schneider, R. Schurig, F. Staufenbiel, J. Teichert
    FZR, Dresden
  • T.  Kamps, D. Lipka
    BESSY GmbH, Berlin
  • W.-D. Lehmann
    IfE, Dresden
  • J. Stephan
    IKST, Drsden
  • V. Volkov
    BINP SB RAS, Novosibirsk
  • I. Will
    MBI, Berlin
 
  In the paper, we report on the status and progress of the superconducting rf gun project in Rossendorf. The gun is designed for cw operation mode with 1mA current and 10 MeV electron energy. The gun will be installed at the ELBE superconducting electron linear accelerator. It will have a 3½ cell niobium cavity operating at 1.3 GHz. The cavity consists of three cells with TESLA geometry and a specially designed half-cell in which the photocathode will be placed. Two Nb cavities, with RRR 300 and 40 respectively, will be finished at the beginning of 2005. After delivery, the rf tests will be performed and the treatment of the cavities will be started. At the same time, the design of the cryostat is finished and the fabrication of its components is under way. Further activities are the design of the diagnostic beam line, the assembling of the new photocathode preparation system, and the upgrade of the 262 nm driver laser system.  
TPAE019 Experimental Progress on a 1 GeV Laser Accelerator at LBNL
 
  • W. Leemans, E. Esarey, C.G.R. Geddes, P. Michel, B. Nagler, K. Nakamura, C.B. Schroeder, C. Toth, J. Van Tilborg
    LBNL, Berkeley, California
  • T.E. Cowan, C. Filip, E. Michel
    University of Nevada, Reno, Reno, Nevada
  • A.J. Gonsalves, S.M. Hooker, D. J. Spence
    OXFORDphysics, Oxford, Oxon
 
  Funding: This work supported by US DoE, DE-AC03-76SF0098 and in part by the Research Councils UK, Basic Technology Programme (GR/R88090) and DOE/NNSA under UNR grant DE-FC52-01NV14050.

Experimental progress towards the realization of a 1 GeV laser-driven plasma-based accelerator at the L’OASIS facility of LBNL will be discussed. The design of the 1 GeV accelerator module consists of two components: (1) an all-optical electron injector and (2) a plasma channel for laser guiding and electron acceleration to high energy via the laser wakefield acceleration (LWFA) mechanism. Experimental results on the injector development include the demonstration of laser guiding at relativistic intensities in preformed plasmas and production of quasi-monochromatic electron beams with energy around 100 MeV. Recently guiding experiments using the 100 TW-class laser upgrade of the L’OASIS facility have been started with capillary discharges. The capillary system provides multi-cm scale plasma channels in hydrogen gas at densities on the order of 1018 cm-3. Such densities are required to have sufficiently high phase velocity of the plasma wave to result in GeV electron beams.